Extracting prog: 1m24.751233073s
Minimizing prog: 6m39.200956082s
Simplifying prog options: 0s
Extracting C: 55.864872683s
Simplifying C: 7m57.789554841s


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: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}}): syz_mount_image$ext4-openat-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000340)='./file1\x00', 0x200000, &(0x7f0000000500)={[{@stripe={'stripe', 0x3d, 0x4}}, {}, {@nodioread_nolock}, {@norecovery}, {@dioread_nolock}, {@oldalloc}, {@oldalloc}, {@sysvgroups}, {@norecovery}]}, 0x3, 0x566, &(0x7f00000015c0)="$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")
openat(0xffffffffffffff9c, 0x0, 0x4842, 0x0)
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, &(0x7f0000000040))

program crashed: KASAN: use-after-free Write in pppol2tp_release
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=31.310051613s, {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}}): syz_mount_image$ext4-openat-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000340)='./file1\x00', 0x200000, &(0x7f0000000500)={[{@stripe={'stripe', 0x3d, 0x4}}, {}, {@nodioread_nolock}, {@norecovery}, {@dioread_nolock}, {@oldalloc}, {@oldalloc}, {@sysvgroups}, {@norecovery}]}, 0x3, 0x566, &(0x7f00000015c0)="$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")
openat(0xffffffffffffff9c, 0x0, 0x4842, 0x0)
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)

program did not crash
testing program (duration=31.310051613s, {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}}): syz_mount_image$ext4-openat-socket$pppl2tp-socket$inet6_udp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000340)='./file1\x00', 0x200000, &(0x7f0000000500)={[{@stripe={'stripe', 0x3d, 0x4}}, {}, {@nodioread_nolock}, {@norecovery}, {@dioread_nolock}, {@oldalloc}, {@oldalloc}, {@sysvgroups}, {@norecovery}]}, 0x3, 0x566, &(0x7f00000015c0)="$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")
openat(0xffffffffffffff9c, 0x0, 0x4842, 0x0)
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, &(0x7f0000000040))

program did not crash
testing program (duration=31.310051613s, {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}}): syz_mount_image$ext4-openat-socket$pppl2tp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000340)='./file1\x00', 0x200000, &(0x7f0000000500)={[{@stripe={'stripe', 0x3d, 0x4}}, {}, {@nodioread_nolock}, {@norecovery}, {@dioread_nolock}, {@oldalloc}, {@oldalloc}, {@sysvgroups}, {@norecovery}]}, 0x3, 0x566, &(0x7f00000015c0)="$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")
openat(0xffffffffffffff9c, 0x0, 0x4842, 0x0)
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, &(0x7f0000000040))

program did not crash
testing program (duration=31.310051613s, {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}}): syz_mount_image$ext4-openat-socket$inet6_udp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000340)='./file1\x00', 0x200000, &(0x7f0000000500)={[{@stripe={'stripe', 0x3d, 0x4}}, {}, {@nodioread_nolock}, {@norecovery}, {@dioread_nolock}, {@oldalloc}, {@oldalloc}, {@sysvgroups}, {@norecovery}]}, 0x3, 0x566, &(0x7f00000015c0)="$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")
openat(0xffffffffffffff9c, 0x0, 0x4842, 0x0)
r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(0xffffffffffffffff, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r0, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(0xffffffffffffffff, 0x80487436, &(0x7f0000000040))

program did not crash
testing program (duration=31.310051613s, {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}}): syz_mount_image$ext4-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000340)='./file1\x00', 0x200000, &(0x7f0000000500)={[{@stripe={'stripe', 0x3d, 0x4}}, {}, {@nodioread_nolock}, {@norecovery}, {@dioread_nolock}, {@oldalloc}, {@oldalloc}, {@sysvgroups}, {@norecovery}]}, 0x3, 0x566, &(0x7f00000015c0)="$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")
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, &(0x7f0000000040))

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, &(0x7f0000000040))

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, 0x0, 0x0)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, &(0x7f0000000040))

program did not crash
testing program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
extracting C reproducer
testing compiled C program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
simplifying C reproducer
testing compiled C program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
a never seen crash title: KASAN: use-after-free Read in pppol2tp_sock_to_session, ignore
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false 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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
a never seen crash title: KASAN: use-after-free Read in pppol2tp_sock_to_session, ignore
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
testing program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, 0x0)

program crashed: KASAN: use-after-free Write in rcu_segcblist_enqueue
validation run: crashed=true
testing program (duration=31.310051613s, {Threaded:false Repeat:false 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: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$pppl2tp-ioctl$PPPIOCGL2TPSTATS
detailed listing:
executing program 0:
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e)
ioctl$PPPIOCGL2TPSTATS(r0, 0x80487436, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
reproducing took 18m34.969838083s
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 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
Write of size 8 at addr ffff8881102f7950 by task syz.2.17/373

CPU: 1 PID: 373 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 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]
 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
 mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1335
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe85600ee59
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:00007ffc23bf57d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffc23bf58c0 RCX: 00007fe85600ee59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000005ced R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b33020000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe856287fac R14: 00007fe856287fa8 R15: 00007fe856287fa0
 </TASK>

Allocated by task 373:
 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:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 __kmalloc+0x13d/0x2c0 mm/slub.c:4436
 kmalloc include/linux/slab.h:624 [inline]
 kzalloc include/linux/slab.h:750 [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:1922 [inline]
 __sys_connect+0x3cb/0x450 net/socket.c:1939
 __do_sys_connect net/socket.c:1949 [inline]
 __se_sys_connect net/socket.c:1946 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1946
 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 373:
 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:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xaf/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:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1335
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff8881102f7800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff8881102f7800, ffff8881102f7a00)
The buggy address belongs to the page:
page:ffffea000440bd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1102f4
head:ffffea000440bd00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 0000000100000001 ffff888100042f00
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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 104, ts 4098341879, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6207
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2542
 unix_dgram_sendmsg+0x6f3/0x19b0 net/unix/af_unix.c:1816
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 sock_write_iter+0x2a6/0x3a0 net/socket.c:1079
 call_write_iter include/linux/fs.h:2212 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x831/0xfd0 fs/read_write.c:594
 ksys_write+0x14a/0x260 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:656
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881102f7800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881102f7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881102f7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881102f7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881102f7a00: 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 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
Write of size 8 at addr ffff8881102f7950 by task syz.2.17/373

CPU: 1 PID: 373 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 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]
 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:169 [inline]
 mutex_lock+0x8e/0x1c0 kernel/locking/mutex.c:288
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1335
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe85600ee59
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:00007ffc23bf57d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffc23bf58c0 RCX: 00007fe85600ee59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000005ced R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b33020000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe856287fac R14: 00007fe856287fa8 R15: 00007fe856287fa0
 </TASK>

Allocated by task 373:
 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:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 __kmalloc+0x13d/0x2c0 mm/slub.c:4436
 kmalloc include/linux/slab.h:624 [inline]
 kzalloc include/linux/slab.h:750 [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:1922 [inline]
 __sys_connect+0x3cb/0x450 net/socket.c:1939
 __do_sys_connect net/socket.c:1949 [inline]
 __se_sys_connect net/socket.c:1946 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1946
 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 373:
 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:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xaf/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:649 [inline]
 sock_close+0xb8/0x200 net/socket.c:1335
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff8881102f7800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff8881102f7800, ffff8881102f7a00)
The buggy address belongs to the page:
page:ffffea000440bd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1102f4
head:ffffea000440bd00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 0000000100000001 ffff888100042f00
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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 104, ts 4098341879, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x210/0x730 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6207
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2542
 unix_dgram_sendmsg+0x6f3/0x19b0 net/unix/af_unix.c:1816
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 sock_write_iter+0x2a6/0x3a0 net/socket.c:1079
 call_write_iter include/linux/fs.h:2212 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x831/0xfd0 fs/read_write.c:594
 ksys_write+0x14a/0x260 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:656
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881102f7800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881102f7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881102f7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881102f7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881102f7a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================