Extracting prog: 2m6.530984085s
Minimizing prog: 11m45.624418951s
Simplifying prog options: 0s
Extracting C: 46.201660691s
Simplifying C: 3m0.713008311s


extracting reproducer from 30 programs
testing a last program of every proc
single: executing 9 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:false 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}}): socket$nl_route-ioctl$sock_SIOCGIFINDEX-socketpair$unix-socket$nl_generic-syz_genetlink_get_family_id$ethtool-ioctl$ifreq_SIOCGIFINDEX_batadv_hard-sendmsg$ETHTOOL_MSG_EEE_SET-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000040)={'bridge0\x00', <r1=>0x0})
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000200)={0xffffffffffffffff, <r2=>0xffffffffffffffff})
r3 = socket$nl_generic(0x10, 0x3, 0x10)
r4 = syz_genetlink_get_family_id$ethtool(&(0x7f0000000000), 0xffffffffffffffff)
ioctl$ifreq_SIOCGIFINDEX_batadv_hard(r2, 0x8933, &(0x7f0000000040)={'batadv_slave_0\x00', <r5=>0x0})
sendmsg$ETHTOOL_MSG_EEE_SET(r3, &(0x7f0000000740)={0x0, 0x0, &(0x7f0000000700)={&(0x7f0000000540)=ANY=[@ANYBLOB="59c51744", @ANYRES16=r4, @ANYBLOB="010026bd7000fcdbdf25180000002000018008000100", @ANYRES32=r5, @ANYBLOB="14000200776c616e3100"/20], 0x34}}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000180)={&(0x7f00000001c0)=ANY=[@ANYBLOB="580000001000ffff27bd7000fedbdf2500000000", @ANYRES32=0x0, @ANYBLOB="150c0000000000001c00128009000100766c616e000000000c000280060001000400000008000500595e602dd9918d5b15ce375c7b835405c3737769615e127aac909294d6bb9117135376143cd465281f79efacdd4ccd442165a92aacfe2a8487b1fed92f9adc82bb42d511e05546c48c89bdddf44ad839487a2aa12017023143966eaf8f50e9cd7ee35ccb35c42abe4bc777288d6bf42fb8a3531fdf3f476722d8bff766853600bde2166f22e4462cbd7e933b7c055bb67353b015c851f29c13c7c8e944009b20292e2de75b", @ANYRES32=r1, @ANYBLOB='\b\x00\n\x00', @ANYRES32=r1, @ANYBLOB="0a000100aaaaaaaaaa160000"], 0x58}, 0x1, 0x0, 0x0, 0x28001}, 0x8000)

program did not crash
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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-write$cgroup_subtree-syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211-sendmsg$NL80211_CMD_FLUSH_PMKSA-ioctl$NILFS_IOCTL_DELETE_CHECKPOINT-syz_mount_image$vfat
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r3, &(0x7f0000004340)={0x2020, 0x0, <r4=>0x0, 0x0, <r5=>0x0}, 0x2020)
r6 = open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
write$cgroup_subtree(r6, &(0x7f0000000140)=ANY=[@ANYBLOB='1-6:5', @ANYRESOCT=r5, @ANYRES64=r4], 0x31)
r7 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000400), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00', <r8=>0x0})
sendmsg$NL80211_CMD_FLUSH_PMKSA(r2, &(0x7f00000006c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x200}, 0xc, &(0x7f0000000500)={&(0x7f00000004c0)={0x1c, r7, 0x300, 0x70bd26, 0x25dfdbfd, {{}, {@val={0x8, 0x3, r8}, @void}}, ["", ""]}, 0x1c}, 0x1, 0x0, 0x0, 0x20040009}, 0x80)
ioctl$NILFS_IOCTL_DELETE_CHECKPOINT(r0, 0x40086e81, &(0x7f0000000700)=0x7)
syz_mount_image$vfat(&(0x7f0000000040), &(0x7f0000000080)='./file0\x00', 0x8400, &(0x7f0000000540)=ANY=[@ANYBLOB="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"], 0x1, 0x312, &(0x7f00000000c0)="$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")

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
single: successfully extracted reproducer
found reproducer with 15 syscalls
minimizing guilty program
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-write$cgroup_subtree-syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211-sendmsg$NL80211_CMD_FLUSH_PMKSA-ioctl$NILFS_IOCTL_DELETE_CHECKPOINT
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r3, &(0x7f0000004340)={0x2020, 0x0, <r4=>0x0, 0x0, <r5=>0x0}, 0x2020)
r6 = open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
write$cgroup_subtree(r6, &(0x7f0000000140)=ANY=[@ANYBLOB='1-6:5', @ANYRESOCT=r5, @ANYRES64=r4], 0x31)
r7 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000400), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00', <r8=>0x0})
sendmsg$NL80211_CMD_FLUSH_PMKSA(r2, &(0x7f00000006c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x200}, 0xc, &(0x7f0000000500)={&(0x7f00000004c0)={0x1c, r7, 0x300, 0x70bd26, 0x25dfdbfd, {{}, {@val={0x8, 0x3, r8}, @void}}, ["", ""]}, 0x1c}, 0x1, 0x0, 0x0, 0x20040009}, 0x80)
ioctl$NILFS_IOCTL_DELETE_CHECKPOINT(r0, 0x40086e81, &(0x7f0000000700)=0x7)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_del_work
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-write$cgroup_subtree-syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211-sendmsg$NL80211_CMD_FLUSH_PMKSA
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r3, &(0x7f0000004340)={0x2020, 0x0, <r4=>0x0, 0x0, <r5=>0x0}, 0x2020)
r6 = open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
write$cgroup_subtree(r6, &(0x7f0000000140)=ANY=[@ANYBLOB='1-6:5', @ANYRESOCT=r5, @ANYRES64=r4], 0x31)
r7 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000400), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00', <r8=>0x0})
sendmsg$NL80211_CMD_FLUSH_PMKSA(r2, &(0x7f00000006c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x200}, 0xc, &(0x7f0000000500)={&(0x7f00000004c0)={0x1c, r7, 0x300, 0x70bd26, 0x25dfdbfd, {{}, {@val={0x8, 0x3, r8}, @void}}, ["", ""]}, 0x1c}, 0x1, 0x0, 0x0, 0x20040009}, 0x80)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-write$cgroup_subtree-syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r2, &(0x7f0000004340)={0x2020, 0x0, <r3=>0x0, 0x0, <r4=>0x0}, 0x2020)
r5 = open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
write$cgroup_subtree(r5, &(0x7f0000000140)=ANY=[@ANYBLOB='1-6:5', @ANYRESOCT=r4, @ANYRES64=r3], 0x31)
syz_genetlink_get_family_id$nl80211(&(0x7f0000000400), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-write$cgroup_subtree-syz_genetlink_get_family_id$nl80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r2, &(0x7f0000004340)={0x2020, 0x0, <r3=>0x0, 0x0, <r4=>0x0}, 0x2020)
r5 = open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
write$cgroup_subtree(r5, &(0x7f0000000140)=ANY=[@ANYBLOB='1-6:5', @ANYRESOCT=r4, @ANYRES64=r3], 0x31)
syz_genetlink_get_family_id$nl80211(&(0x7f0000000400), 0xffffffffffffffff)

program did not crash
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-write$cgroup_subtree-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r2, &(0x7f0000004340)={0x2020, 0x0, <r3=>0x0, 0x0, <r4=>0x0}, 0x2020)
r5 = open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
write$cgroup_subtree(r5, &(0x7f0000000140)=ANY=[@ANYBLOB='1-6:5', @ANYRESOCT=r4, @ANYRES64=r3], 0x31)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-open-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r2, &(0x7f0000004340)={0x2020}, 0x2020)
open(&(0x7f0000000000)='./cgroup.cpu/cpuset.cpus\x00', 0x1a1342, 0x0)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-read$FUSE-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
read$FUSE(r2, &(0x7f0000004340)={0x2020}, 0x2020)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-syz_open_procfs-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
syz_open_procfs(0x0, &(0x7f0000000080)='net/udplite6\x00')
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-socket$nl_generic-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-writev-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000440)="ee", 0x1}], 0x1)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$inet6-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @loopback, 0xfffffffc}, 0x1c)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program did not crash
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program did not crash
testing program (duration=31.446811551s, {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:false 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}}): socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(0xffffffffffffffff, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r0, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program did not crash
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, 0x0, 0x0)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f0000000480)={'wlan0\x00'})

program did not crash
testing program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
extracting C reproducer
testing compiled C program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Write in pppol2tp_release
simplifying C reproducer
testing compiled C program (duration=31.446811551s, {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:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.446811551s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false 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}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
testing program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, 0x0)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
validation run: crashed=true
testing program (duration=31.446811551s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$sock_SIOCGIFINDEX_80211
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x4, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0xffff, @ipv4={'\x00', '\xff\xff', @empty}}}}, 0x32)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
reproducing took 19m32.414433511s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
Write of size 8 at addr ffff8881111ec150 by task syz.2.17/395

CPU: 0 PID: 395 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
 mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f964a300e99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffca0475928 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffca0475a10 RCX: 00007f964a300e99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000091dc R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2c620000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f964a588fac R14: 00007f964a588fa8 R15: 00007f964a588fa0

Allocated by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x19f/0x330 mm/slub.c:4038
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772
 __sys_connect_file net/socket.c:1867 [inline]
 __sys_connect+0x3ce/0x450 net/socket.c:1884
 __do_sys_connect net/socket.c:1894 [inline]
 __se_sys_connect net/socket.c:1891 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1891
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xb2/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:439
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff8881111ec000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff8881111ec000, ffff8881111ec200)
The buggy address belongs to the page:
page:ffffea0004447b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1111ec
head:ffffea0004447b00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 391, ts 37358950751, free_ts 37341191875
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x35c/0xb30 net/netlink/af_netlink.c:2443
 netlink_rcv_skb+0x267/0x430 net/netlink/af_netlink.c:2514
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x467/0x620 net/socket.c:2007
 __do_sys_sendto net/socket.c:2019 [inline]
 __se_sys_sendto net/socket.c:2015 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2015
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_ifinfo_build_skb+0x75/0x180 net/core/rtnetlink.c:3848
 rtmsg_ifinfo_event net/core/rtnetlink.c:3884 [inline]
 rtmsg_ifinfo+0x7a/0x130 net/core/rtnetlink.c:3893

Memory state around the buggy address:
 ffff8881111ec000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881111ec080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881111ec100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881111ec180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881111ec200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
Write of size 8 at addr ffff8881111ec150 by task syz.2.17/395

CPU: 0 PID: 395 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
 mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f964a300e99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffca0475928 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffca0475a10 RCX: 00007f964a300e99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000091dc R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2c620000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f964a588fac R14: 00007f964a588fa8 R15: 00007f964a588fa0

Allocated by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x19f/0x330 mm/slub.c:4038
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772
 __sys_connect_file net/socket.c:1867 [inline]
 __sys_connect+0x3ce/0x450 net/socket.c:1884
 __do_sys_connect net/socket.c:1894 [inline]
 __se_sys_connect net/socket.c:1891 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1891
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 395:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xb2/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:439
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff8881111ec000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff8881111ec000, ffff8881111ec200)
The buggy address belongs to the page:
page:ffffea0004447b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1111ec
head:ffffea0004447b00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 391, ts 37358950751, free_ts 37341191875
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x35c/0xb30 net/netlink/af_netlink.c:2443
 netlink_rcv_skb+0x267/0x430 net/netlink/af_netlink.c:2514
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x467/0x620 net/socket.c:2007
 __do_sys_sendto net/socket.c:2019 [inline]
 __se_sys_sendto net/socket.c:2015 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2015
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_ifinfo_build_skb+0x75/0x180 net/core/rtnetlink.c:3848
 rtmsg_ifinfo_event net/core/rtnetlink.c:3884 [inline]
 rtmsg_ifinfo+0x7a/0x130 net/core/rtnetlink.c:3893

Memory state around the buggy address:
 ffff8881111ec000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881111ec080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881111ec100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881111ec180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881111ec200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================