Extracting prog: 5m12.485326641s
Minimizing prog: 23m6.734697088s
Simplifying prog options: 0s
Extracting C: 53.272808435s
Simplifying C: 24m46.594736482s


extracting reproducer from 30 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-socket-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
socket(0xa, 0x3, 0x3a)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
single: failed to extract reproducer
bisect: bisecting 30 programs with base timeout 30s
testing program (duration=37s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): [5, 9, 5, 1, 5, 12, 4, 3, 5, 5, 1, 23, 3, 5, 1, 3, 5, 12, 12, 3, 2, 14, 5, 1, 3, 3, 3, 9, 7, 5]
detailed listing:
executing program 2:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000000)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendmsg$unix(r1, &(0x7f00000018c0)={0x0, 0x0, 0x0, 0x0, &(0x7f0000001780)=ANY=[@ANYBLOB="14000000000000000100000001000000", @ANYRES32=r1], 0x18}, 0x0)
close(r1)
sendmsg$inet(r0, 0x0, 0x0)
close(r0)
executing program 2:
mmap(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x2, 0x5031, 0xffffffffffffffff, 0xc2dcc000)
bind$inet6(0xffffffffffffffff, &(0x7f0000000000)={0xa, 0x4e23, 0x7, @private1, 0x5}, 0x1c)
futex(&(0x7f0000000040)=0x2, 0xb, 0x2, 0x0, &(0x7f0000000100)=0x1, 0x2)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, 0x0)
wait4(0x0, 0x0, 0x8, 0x0)
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDFONTOP_SET(r0, 0x4b52, &(0x7f0000000140)={0x0, 0x1, 0x6, 0x2, 0x200, 0x0})
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x6c304000)
futex(&(0x7f0000000040)=0x1, 0x6, 0x0, &(0x7f0000000080)={0x77359400}, 0x0, 0x1)
executing program 0:
bpf$PROG_LOAD(0x5, &(0x7f0000000100)={0x0, 0x5, &(0x7f0000000000)=ANY=[@ANYBLOB="1800000000000000000000000000000085000000a8000000850000005000000095"], 0x0, 0x4000000, 0x0, 0x0, 0x0, 0x48, '\x00', 0x0, @fallback=0x1e, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff}, 0x94)
bpf$PROG_LOAD(0x5, &(0x7f0000000a00)={0x1f, 0x5, &(0x7f0000000000)=ANY=[], &(0x7f0000000040)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x1f, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94)
socket$inet6_tcp(0xa, 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
bpf$PROG_BIND_MAP(0xa, &(0x7f0000000340), 0xc)
executing program 2:
syz_emit_vhci(0x0, 0x7)
executing program 0:
write$cgroup_subtree(0xffffffffffffffff, &(0x7f0000000100)=ANY=[@ANYBLOB="00070000420091"], 0xfe33)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket$packet(0x11, 0x2, 0x300)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'erspan0\x00', <r2=>0x0})
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000018c0)={&(0x7f00000000c0)=ANY=[@ANYBLOB, @ANYRES32=r2, @ANYBLOB="ebffffffffffffff280012800b00010065727370616e000018000280040012000500163001000000080015"], 0x48}}, 0x0)
executing program 2:
r0 = bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000780)={0x6, 0x4, &(0x7f0000000580)=ANY=[@ANYBLOB], &(0x7f00000005c0)='GPL\x00'}, 0x94)
r1 = socket(0x10, 0x803, 0x8)
sendmsg$IPVS_CMD_SET_INFO(r1, &(0x7f0000000b00)={0x0, 0x0, &(0x7f0000000ac0)={0x0, 0x2d}, 0x1, 0x0, 0x0, 0x8801}, 0x8000)
r2 = socket$netlink(0x10, 0x3, 0x0)
getsockname$packet(r1, &(0x7f0000000600)={0x11, 0x0, <r3=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000180)=0x14)
sendmsg$nl_route(r2, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000640)=ANY=[@ANYBLOB="3c0000001000850600000000ff6122314a000800", @ANYRES32=r3, @ANYBLOB="00001000252155b21c0012000c000100626f6e64"], 0x3c}}, 0x40000)
r4 = socket$netlink(0x10, 0x3, 0x0)
r5 = socket(0x10, 0x803, 0x4)
sendmsg$IPVS_CMD_SET_INFO(r5, &(0x7f0000000b00)={0x0, 0x0, &(0x7f0000000ac0)={0x0, 0x14}}, 0x0)
getsockname$packet(r5, &(0x7f0000000340)={0x11, 0x0, <r6=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14)
sendmsg$nl_route(r4, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000840)=ANY=[@ANYBLOB="4800000010001fff000000008000000000000000", @ANYRES32=0x0, @ANYBLOB='\x00\x00\x00\x00\x00?\x00\x00\b\x00\n\x00', @ANYRES32=r6, @ANYBLOB="200012800e0001006970366772657461700000000c00028008000100", @ANYRES32], 0x48}, 0x1, 0x0, 0x0, 0x2000c0c1}, 0x40000)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f0000000440)={r0, r3, 0x25, 0x0, @val=@netkit}, 0x1c)
executing program 3:
r0 = bpf$MAP_CREATE(0x0, &(0x7f0000000880)=@base={0x6, 0x4, 0xfff, 0x7, 0x88}, 0xa3)
bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="180000000000000000000000400000", @ANYRES32=r0, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb70300000e41621eb70400000000000085000000c300000095"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94)
r1 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x4, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000040)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback=0x24, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94)
bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f00000003c0)={r1, 0x2000300, 0xe, 0xfffffd83, &(0x7f0000000000)="63eced8e46dc3f0adf3389f7b986", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x50)
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$ethtool(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$ETHTOOL_MSG_DEBUG_SET(r0, &(0x7f0000001540)={0x0, 0x0, &(0x7f0000001500)={&(0x7f0000000140)=ANY=[@ANYBLOB='H\x00\x00\x00', @ANYRES16=r1, @ANYBLOB="010028bd70000000000008000000180001801400020073797a5f74756e0000000000000000001c0002801800038010"], 0x48}}, 0x0)
executing program 3:
socket$inet_tcp(0x2, 0x1, 0x0)
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x19, &(0x7f00000000c0)=0x100000001, 0x4)
connect$inet(r0, &(0x7f00000010c0)={0x2, 0x4e22, @dev={0xac, 0x14, 0x14, 0xb}}, 0x10)
ppoll(&(0x7f0000000380), 0x0, 0x0, 0x0, 0x0)
executing program 2:
bpf$PROG_LOAD(0x5, &(0x7f0000000100)={0x0, 0x5, &(0x7f0000000000)=ANY=[@ANYBLOB="1800000000000000000000000000000085000000a8000000850000005000000095"], 0x0, 0x4000000, 0x0, 0x0, 0x0, 0x48, '\x00', 0x0, @fallback=0x1e, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff}, 0x94)
bpf$PROG_LOAD(0x5, &(0x7f0000000a00)={0x1f, 0x5, &(0x7f0000000000)=ANY=[], &(0x7f0000000040)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x1f, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94)
socket$inet6_tcp(0xa, 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
bpf$PROG_BIND_MAP(0xa, &(0x7f0000000340), 0xc)
executing program 0:
syz_emit_vhci(0x0, 0x7)
executing program 2:
r0 = bpf$MAP_CREATE(0x0, 0x0, 0x0)
bpf$MAP_GET_NEXT_KEY(0x2, &(0x7f0000000080)={r0, 0x0, &(0x7f0000000200)=""/166}, 0x20)
prlimit64(0x0, 0xe, &(0x7f0000000240)={0x8, 0x244}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7)
r1 = getpid()
sched_setaffinity(0x0, 0x1, &(0x7f00000002c0)=0x2)
sched_setscheduler(r1, 0x2, &(0x7f0000000200)=0x6)
ioctl$TIOCGPGRP(0xffffffffffffffff, 0x540f, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0xffffe000)
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000540)={<r2=>0xffffffffffffffff, <r3=>0xffffffffffffffff})
connect$unix(r2, &(0x7f00000004c0)=@abs={0x0, 0x0, 0x4e21}, 0x6e)
sendmmsg$unix(r3, &(0x7f0000000000), 0x651, 0x0)
recvmmsg(r2, &(0x7f00000000c0), 0x3fffffffffffeda, 0x2, 0x0)
unshare(0x62040200)
r4 = socket$inet_icmp_raw(0x2, 0x3, 0x1)
setsockopt$SO_BINDTODEVICE(r4, 0x1, 0x19, &(0x7f0000000040)='veth1_virt_wifi\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount(0x0, &(0x7f0000000080)='./file0\x00', &(0x7f0000000040)='cgroup2\x00', 0x0, 0x0)
mount$overlay(0x0, &(0x7f0000000140)='./file0\x00', 0x0, 0x0, &(0x7f00000003c0)={[{@xino_auto}, {@lowerdir={'lowerdir', 0x3d, './file0'}, 0x3a}], [], 0x2f})
mount$overlay(0x0, &(0x7f0000000140)='./file0\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)={[{@xino_auto}, {@lowerdir={'lowerdir', 0x3d, './file0'}, 0x3a}], [], 0x2f})
newfstatat(0xffffffffffffff9c, &(0x7f0000000340)='./file0\x00', &(0x7f0000000500), 0x0)
r5 = socket$netlink(0x10, 0x3, 0x0)
writev(r5, 0x0, 0x0)
executing program 4:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_MCAST_JOIN_GROUP(r0, 0x29, 0x2a, &(0x7f0000000140)={0x0, {{0xa, 0x10, 0x0, @mcast2}}}, 0x88)
syz_emit_ethernet(0x4e, &(0x7f0000000200)={@multicast, @remote, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "120008", 0x18, 0x3a, 0x0, @remote, @mcast2, {[@hopopts={0x84}], @ndisc_ra={0x86, 0x0, 0x0, 0x0, 0xd5, 0x4, 0x40, 0x1ff}}}}}}, 0x0)
executing program 0:
write$cgroup_subtree(0xffffffffffffffff, &(0x7f0000000100)=ANY=[@ANYBLOB="00070000420091"], 0xfe33)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket$packet(0x11, 0x2, 0x300)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'erspan0\x00', <r2=>0x0})
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000018c0)={&(0x7f00000000c0)=ANY=[@ANYBLOB, @ANYRES32=r2, @ANYBLOB="ebffffffffffffff280012800b00010065727370616e000018000280040012000500163001000000080015"], 0x48}}, 0x0)
executing program 4:
syz_emit_ethernet(0x52, &(0x7f0000000440)={@local, @random='\x00 \x00\x00\x00\b', @void, {@ipv4={0x800, @tcp={{0xc, 0x4, 0x0, 0x0, 0x44, 0x0, 0x0, 0x4, 0x6, 0x0, @initdev={0xac, 0x1e, 0x0, 0x0}, @dev={0xac, 0x14, 0x14, 0xd}, {[@lsrr={0x83, 0x7, 0xd7, [@multicast2]}, @timestamp={0x44, 0xc, 0x5, 0x3, 0x0, [0x787, 0x0]}, @cipso={0x86, 0x6}]}}, {{0x0, 0x0, 0x41424344, 0x41424344, 0x0, 0x0, 0x5}}}}}}, 0x0)
executing program 4:
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x40082, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00')
mount$9p_fd(0x0, &(0x7f0000000300)='.\x00', &(0x7f0000000080), 0x804000, &(0x7f0000000180)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX=r0, @ANYBLOB=',wfdno='])
executing program 4:
r0 = socket$inet6_sctp(0xa, 0x5, 0x84)
setsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX_OLD(r0, 0x84, 0x6b, &(0x7f0000000080)=[@in6={0xa, 0x4e21, 0xd9a, @remote, 0x9}], 0x1c)
setsockopt(r0, 0x84, 0x7f, &(0x7f0000000040)="02000000", 0x4)
setsockopt$inet_sctp6_SCTP_I_WANT_MAPPED_V4_ADDR(r0, 0x84, 0xc, &(0x7f0000000100), 0x4)
recvmsg(r0, &(0x7f0000000300)={0x0, 0x0, 0x0}, 0x0)
executing program 1:
r0 = openat$binderfs(0xffffffffffffff9c, &(0x7f00000000c0)='./binderfs/binder0\x00', 0x0, 0x0)
ioctl$BINDER_SET_CONTEXT_MGR_EXT(r0, 0x4018620d, &(0x7f0000000780))
r1 = openat$binderfs(0xffffffffffffff9c, &(0x7f0000000140)='./binderfs/binder0\x00', 0x0, 0x0)
ioctl$BINDER_WRITE_READ(r1, 0xc0306201, &(0x7f0000000080)={0x8, 0x0, &(0x7f0000000400)=[@increfs], 0x0, 0x0, 0x0})
r2 = openat$binderfs(0xffffffffffffff9c, &(0x7f0000000040)='./binderfs/binder0\x00', 0x0, 0x0)
mmap$binder(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x1, 0x11, r2, 0x0)
ioctl$BINDER_SET_CONTEXT_MGR_EXT(r2, 0x4018620d, &(0x7f0000004a80)={0x73622a85, 0x100, 0x1})
ioctl$BINDER_WRITE_READ(0xffffffffffffffff, 0xc0306201, &(0x7f00000004c0)={0x8, 0x0, &(0x7f0000000000)=[@acquire], 0x0, 0x0, 0x0})
ioctl$BINDER_WRITE_READ(0xffffffffffffffff, 0xc0306201, &(0x7f00000001c0)={0x4c, 0x0, &(0x7f0000000fc0)=[@transaction_sg={0x40486311, {0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x48, 0x18, &(0x7f0000000300)={@flat=@weak_binder={0x77622a85, 0x100a, 0x8000000000}, @flat=@weak_binder={0x77622a85, 0x1100, 0x3}}, &(0x7f0000000200)={0x0, 0x18, 0x30}}}], 0x0, 0x0, 0x0})
ioctl$BINDER_WRITE_READ(r2, 0xc0306201, &(0x7f0000000180)={0x0, 0x0, 0x0, 0x50, 0x0, &(0x7f0000000580)="b3185d7bb56f70f003360fa8bf71ac3086aedebf6fff904f92849a7a07395ee7f0e4cb1d78001c08a0ab73ffcf5ad07693727980eea946e6cba1723e81bfa5c3688803c8a124dcb27df7938e7ddfdd52"})
ioctl$BINDER_THREAD_EXIT(r2, 0x40046208, 0x0)
ioctl$BINDER_WRITE_READ(r0, 0xc0306201, &(0x7f0000000480)={0x4c, 0x0, &(0x7f0000000500)=[@transaction_sg={0x40486311, {0x1, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}], 0x0, 0x0, 0x0})
executing program 0:
r0 = bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000780)={0x6, 0x4, &(0x7f0000000580)=ANY=[@ANYBLOB], &(0x7f00000005c0)='GPL\x00'}, 0x94)
r1 = socket(0x10, 0x803, 0x8)
sendmsg$IPVS_CMD_SET_INFO(r1, &(0x7f0000000b00)={0x0, 0x0, &(0x7f0000000ac0)={0x0, 0x2d}, 0x1, 0x0, 0x0, 0x8801}, 0x8000)
r2 = socket$netlink(0x10, 0x3, 0x0)
getsockname$packet(r1, &(0x7f0000000600)={0x11, 0x0, <r3=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000180)=0x14)
sendmsg$nl_route(r2, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000640)=ANY=[@ANYBLOB="3c0000001000850600000000ff6122314a000800", @ANYRES32=r3, @ANYBLOB="00001000252155b21c0012000c000100626f6e64"], 0x3c}}, 0x40000)
r4 = socket$netlink(0x10, 0x3, 0x0)
r5 = socket(0x10, 0x803, 0x4)
sendmsg$IPVS_CMD_SET_INFO(r5, &(0x7f0000000b00)={0x0, 0x0, &(0x7f0000000ac0)={0x0, 0x14}}, 0x0)
getsockname$packet(r5, &(0x7f0000000340)={0x11, 0x0, <r6=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14)
sendmsg$nl_route(r4, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000840)=ANY=[@ANYBLOB="4800000010001fff000000008000000000000000", @ANYRES32=0x0, @ANYBLOB='\x00\x00\x00\x00\x00?\x00\x00\b\x00\n\x00', @ANYRES32=r6, @ANYBLOB="200012800e0001006970366772657461700000000c00028008000100", @ANYRES32], 0x48}, 0x1, 0x0, 0x0, 0x2000c0c1}, 0x40000)
bpf$BPF_LINK_CREATE_XDP(0x1c, &(0x7f0000000440)={r0, r3, 0x25, 0x0, @val=@netkit}, 0x1c)
executing program 3:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$ethtool(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$ETHTOOL_MSG_DEBUG_SET(r0, &(0x7f0000001540)={0x0, 0x0, &(0x7f0000001500)={&(0x7f0000000140)=ANY=[@ANYBLOB='H\x00\x00\x00', @ANYBLOB="010028bd70000000000008000000180001801400020073797a5f74756e0000000000000000001c0002801800038010"], 0x48}}, 0x0)
executing program 3:
sendmsg$NFT_BATCH(0xffffffffffffffff, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000100)={{0x14}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz0\x00'}]}], {0x14}}, 0x48}}, 0x0)
syz_emit_ethernet(0x66, &(0x7f0000000c00)={@broadcast, @remote, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, '\x00\x00\b', 0x30, 0x3a, 0xff, @local, @mcast2, {[], @ndisc_redir={0x87, 0x0, 0x0, '\x00', @local, @mcast2={0xe}, [{0x1, 0x1, "2025b07f3c58"}]}}}}}}, 0x0)
executing program 4:
r0 = openat$udambuf(0xffffffffffffff9c, &(0x7f0000000040), 0x2)
r1 = memfd_create(&(0x7f0000000080)='y\x105\xfb\xf7u\x83%:r\xc2\xb9x\xa4q\xc1\xea\x7f\x8cZ7`_4t\xcda\x9b\x11\x11\x0e\xa1\xcf\x00'/51, 0x6)
ftruncate(r1, 0x2000000)
prlimit64(0x0, 0xe, &(0x7f0000000480)={0x7, 0x100}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000240)=0x7)
r2 = getpid()
sched_setscheduler(r2, 0x2, &(0x7f0000000200)=0x7)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0x0)
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000200)={<r3=>0xffffffffffffffff})
connect$unix(r3, &(0x7f000057eff8)=@abs, 0x6e)
recvmmsg(r3, &(0x7f00000000c0), 0x10106, 0x2, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000000)=0x6)
fcntl$addseals(r1, 0x409, 0x7)
ioctl$UDMABUF_CREATE(r0, 0x40187542, &(0x7f0000000000)={r1, 0x1f, 0x0, 0x1000000})
executing program 1:
bpf$PROG_LOAD(0x5, &(0x7f0000000100)={0x0, 0x5, &(0x7f0000000000)=ANY=[@ANYBLOB="1800000000000000000000000000000085000000a8000000850000005000000095"], 0x0, 0x4000000, 0x0, 0x0, 0x0, 0x48, '\x00', 0x0, @fallback=0x1e, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff}, 0x94)
bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f0000000340)={0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x48)
socket$inet6_tcp(0xa, 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
bpf$PROG_BIND_MAP(0xa, &(0x7f0000000340), 0xc)
executing program 1:
syz_emit_vhci(0x0, 0x7)
executing program 3:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_MCAST_MSFILTER(r0, 0x29, 0x30, &(0x7f0000000380)=ANY=[@ANYBLOB="0b000000000000000a00000000000000ff020000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000020000000a00000000000000fe8000000000000000000000000000bb00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a00000000000000fe8000000000000000000000000000bb"], 0x190)
syz_emit_ethernet(0x4e, &(0x7f0000000200)={@multicast, @remote, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "120008", 0x18, 0x3a, 0x0, @remote, @mcast2, {[@hopopts={0x84}], @ndisc_ra={0x86, 0x0, 0x0, 0x0, 0xd5, 0x4, 0x40, 0x1ff}}}}}}, 0x0)
executing program 1:
r0 = getpid()
r1 = syz_pidfd_open(r0, 0x0)
open_by_handle_at(r1, &(0x7f0000000000)=@shmem={0xc, 0x1, {0x3ff, 0x5}}, 0x40080)
executing program 1:
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x40082, 0x0)
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00')
mount$9p_fd(0x0, &(0x7f0000000300)='.\x00', &(0x7f0000000080), 0x804000, &(0x7f0000000180)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX=r0, @ANYBLOB=',wfdno='])
executing program 3:
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000100)={0x19, 0x3, &(0x7f00000003c0)=ANY=[@ANYBLOB="1800000001000000000000000000000095"], &(0x7f0000000200)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x9, '\x00', 0x0, @cgroup_sockopt=0x16, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94)
r1 = fsopen(&(0x7f0000000000)='cgroup2\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r1, 0x6, 0x0, 0x0, 0x0)
r2 = fsmount(r1, 0x0, 0x80)
bpf$BPF_LINK_CREATE(0x1c, &(0x7f00000000c0)={r0, r2, 0x16, 0x0, @void}, 0x10)
setsockopt(0xffffffffffffffff, 0x84, 0x7f, &(0x7f0000000040)="02", 0x1)
r3 = socket(0x2b, 0x80801, 0x1)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
setsockopt$inet6_tcp_int(r3, 0x6, 0x9, &(0x7f0000000040)=0x400, 0x4)
executing program 4:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
socket(0xa, 0x3, 0x3a)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)
executing program 1:
r0 = socket(0x40000000015, 0x5, 0x0)
setsockopt$sock_int(r0, 0x1, 0x23, &(0x7f0000000000)=0x2, 0x4)
bind$inet(r0, &(0x7f00008a5ff0)={0x2, 0x0, @loopback}, 0x10)
recvmmsg(r0, 0x0, 0x0, 0x0, 0x0)
sendto$inet(r0, 0x0, 0x0, 0x0, &(0x7f0000000200)={0x2, 0x0, @loopback}, 0x10)

program did not crash
replaying the whole log did not cause a kernel crash
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-socket-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
socket(0xa, 0x3, 0x3a)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-socket-mmap
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
socket(0xa, 0x3, 0x3a)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-socket-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
socket(0xa, 0x3, 0x3a)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300))
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(0x0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, 0x0, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, 0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(0x0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, 0x0, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(0x0, 0x0, 0x2)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
simplifying C reproducer
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-mmap-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f00000000c0)={0x0, 0x21, 0x2}, &(0x7f0000000300)=<r0=>0x0)
fcntl$lock(0xffffffffffffffff, 0x26, &(0x7f0000000040)={0x0, 0x0, 0x10001, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(r0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x300000b, 0x204031, 0xffffffffffffffff, 0x42795000)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
reproducing took 58m21.101478475s
repro crashed as (corrupted=false):
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in dvb_device_open+0xc4/0x360 drivers/media/dvb-core/dvbdev.c:99
Read of size 8 at addr ffff88802c7cac18 by task syz.0.19/5817

CPU: 1 UID: 0 PID: 5817 Comm: syz.0.19 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 dvb_device_open+0xc4/0x360 drivers/media/dvb-core/dvbdev.c:99
 chrdev_open+0x4d0/0x5f0 fs/char_dev.c:411
 do_dentry_open+0x83d/0x13e0 fs/open.c:947
 vfs_open+0x3b/0x350 fs/open.c:1079
 do_open fs/namei.c:4699 [inline]
 path_openat+0x2e43/0x38a0 fs/namei.c:4858
 do_file_open+0x23e/0x4a0 fs/namei.c:4887
 do_sys_openat2+0x113/0x200 fs/open.c:1364
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1381
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f066b92d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffcabd656e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055558b0cd500 RCX: 00007f066b92d60e
RDX: 0000000000000002 RSI: 00007ffcabd657c0 RDI: ffffffffffffff9c
RBP: 00007ffcabd657c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f066bbe5fac R14: 00007f066bbe5fa0 R15: 00007f066bbe5fa0
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x3a6/0x690 mm/slub.c:5419
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 dvb_register_device+0x2fd/0x21e0 drivers/media/dvb-core/dvbdev.c:472
 dvb_register_frontend+0x631/0x920 drivers/media/dvb-core/dvb_frontend.c:3051
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:438 [inline]
 vidtv_bridge_probe+0x9aa/0xf80 drivers/media/test-drivers/vidtv/vidtv_bridge.c:510
 platform_probe+0xf9/0x190 drivers/base/platform.c:1418
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x267/0xaf0 drivers/base/dd.c:709
 __driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
 __driver_attach+0x34c/0x640 drivers/base/dd.c:1295
 bus_for_each_dev+0x23e/0x2c0 drivers/base/bus.c:383
 bus_add_driver+0x348/0x670 drivers/base/bus.c:756
 driver_register+0x23a/0x320 drivers/base/driver.c:249
 vidtv_bridge_init+0x28/0x50 drivers/media/test-drivers/vidtv/vidtv_bridge.c:600
 do_one_initcall+0x250/0x870 init/main.c:1392
 do_initcall_level+0x104/0x190 init/main.c:1454
 do_initcalls+0x59/0xa0 init/main.c:1470
 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
 kernel_init+0x1d/0x1d0 init/main.c:1593
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 5816:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6250 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6565
 dvb_free_device drivers/media/dvb-core/dvbdev.c:616 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:629 [inline]
 dvb_device_open+0x2d6/0x360 drivers/media/dvb-core/dvbdev.c:113
 chrdev_open+0x4d0/0x5f0 fs/char_dev.c:411
 do_dentry_open+0x83d/0x13e0 fs/open.c:947
 vfs_open+0x3b/0x350 fs/open.c:1079
 do_open fs/namei.c:4699 [inline]
 path_openat+0x2e43/0x38a0 fs/namei.c:4858
 do_file_open+0x23e/0x4a0 fs/namei.c:4887
 do_sys_openat2+0x113/0x200 fs/open.c:1364
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1381
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802c7cac00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 freed 512-byte region [ffff88802c7cac00, ffff88802c7cae00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2c7c8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88801a00bc80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801a00bc80 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0080000000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 14028135008, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858
 prep_new_page mm/page_alloc.c:1866 [inline]
 get_page_from_freelist+0x27c8/0x2840 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x33c/0x3d0 mm/slub.c:7255
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x373/0x720 mm/slub.c:4651
 alloc_from_pcs mm/slub.c:4749 [inline]
 slab_alloc_node mm/slub.c:4883 [inline]
 __kmalloc_cache_noprof+0x44e/0x690 mm/slub.c:5414
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 bus_add_driver+0x165/0x670 drivers/base/bus.c:740
 driver_register+0x23a/0x320 drivers/base/driver.c:249
 usb_register_driver+0x1e4/0x390 drivers/usb/core/driver.c:1078
 pvr_init+0x4c/0xb0 drivers/media/usb/pvrusb2/pvrusb2-main.c:112
 do_one_initcall+0x250/0x870 init/main.c:1392
 do_initcall_level+0x104/0x190 init/main.c:1454
 do_initcalls+0x59/0xa0 init/main.c:1470
 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
 kernel_init+0x1d/0x1d0 init/main.c:1593
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802c7cab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802c7cab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802c7cac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff88802c7cac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802c7cad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in dvb_device_open+0xc4/0x360 drivers/media/dvb-core/dvbdev.c:99
Read of size 8 at addr ffff88802c7cac18 by task syz.0.19/5817

CPU: 1 UID: 0 PID: 5817 Comm: syz.0.19 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 dvb_device_open+0xc4/0x360 drivers/media/dvb-core/dvbdev.c:99
 chrdev_open+0x4d0/0x5f0 fs/char_dev.c:411
 do_dentry_open+0x83d/0x13e0 fs/open.c:947
 vfs_open+0x3b/0x350 fs/open.c:1079
 do_open fs/namei.c:4699 [inline]
 path_openat+0x2e43/0x38a0 fs/namei.c:4858
 do_file_open+0x23e/0x4a0 fs/namei.c:4887
 do_sys_openat2+0x113/0x200 fs/open.c:1364
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1381
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f066b92d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffcabd656e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055558b0cd500 RCX: 00007f066b92d60e
RDX: 0000000000000002 RSI: 00007ffcabd657c0 RDI: ffffffffffffff9c
RBP: 00007ffcabd657c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f066bbe5fac R14: 00007f066bbe5fa0 R15: 00007f066bbe5fa0
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x3a6/0x690 mm/slub.c:5419
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 dvb_register_device+0x2fd/0x21e0 drivers/media/dvb-core/dvbdev.c:472
 dvb_register_frontend+0x631/0x920 drivers/media/dvb-core/dvb_frontend.c:3051
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:438 [inline]
 vidtv_bridge_probe+0x9aa/0xf80 drivers/media/test-drivers/vidtv/vidtv_bridge.c:510
 platform_probe+0xf9/0x190 drivers/base/platform.c:1418
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x267/0xaf0 drivers/base/dd.c:709
 __driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
 __driver_attach+0x34c/0x640 drivers/base/dd.c:1295
 bus_for_each_dev+0x23e/0x2c0 drivers/base/bus.c:383
 bus_add_driver+0x348/0x670 drivers/base/bus.c:756
 driver_register+0x23a/0x320 drivers/base/driver.c:249
 vidtv_bridge_init+0x28/0x50 drivers/media/test-drivers/vidtv/vidtv_bridge.c:600
 do_one_initcall+0x250/0x870 init/main.c:1392
 do_initcall_level+0x104/0x190 init/main.c:1454
 do_initcalls+0x59/0xa0 init/main.c:1470
 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
 kernel_init+0x1d/0x1d0 init/main.c:1593
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 5816:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6250 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6565
 dvb_free_device drivers/media/dvb-core/dvbdev.c:616 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:629 [inline]
 dvb_device_open+0x2d6/0x360 drivers/media/dvb-core/dvbdev.c:113
 chrdev_open+0x4d0/0x5f0 fs/char_dev.c:411
 do_dentry_open+0x83d/0x13e0 fs/open.c:947
 vfs_open+0x3b/0x350 fs/open.c:1079
 do_open fs/namei.c:4699 [inline]
 path_openat+0x2e43/0x38a0 fs/namei.c:4858
 do_file_open+0x23e/0x4a0 fs/namei.c:4887
 do_sys_openat2+0x113/0x200 fs/open.c:1364
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1381
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802c7cac00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 freed 512-byte region [ffff88802c7cac00, ffff88802c7cae00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2c7c8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88801a00bc80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801a00bc80 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0080000000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 14028135008, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858
 prep_new_page mm/page_alloc.c:1866 [inline]
 get_page_from_freelist+0x27c8/0x2840 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x33c/0x3d0 mm/slub.c:7255
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x373/0x720 mm/slub.c:4651
 alloc_from_pcs mm/slub.c:4749 [inline]
 slab_alloc_node mm/slub.c:4883 [inline]
 __kmalloc_cache_noprof+0x44e/0x690 mm/slub.c:5414
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 bus_add_driver+0x165/0x670 drivers/base/bus.c:740
 driver_register+0x23a/0x320 drivers/base/driver.c:249
 usb_register_driver+0x1e4/0x390 drivers/usb/core/driver.c:1078
 pvr_init+0x4c/0xb0 drivers/media/usb/pvrusb2/pvrusb2-main.c:112
 do_one_initcall+0x250/0x870 init/main.c:1392
 do_initcall_level+0x104/0x190 init/main.c:1454
 do_initcalls+0x59/0xa0 init/main.c:1470
 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
 kernel_init+0x1d/0x1d0 init/main.c:1593
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802c7cab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802c7cab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802c7cac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff88802c7cac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802c7cad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================