Extracting prog: 1m11.748130109s
Minimizing prog: 12m4.71749045s
Simplifying prog options: 0s
Extracting C: 22.308854684s
Simplifying C: 14m53.297262709s
extracting reproducer from 1 programs
testing a last program of every proc
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE-mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, 0x0, 0x50)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE-mkdirat-mount$bind
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, 0x0, 0x50)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE-mkdirat-mount$incfs
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, 0x0, 0x50)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE-mount$bind-mount$incfs
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, 0x0, 0x50)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(0x0, &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', 0x0, 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(0x0, &(0x7f0000000080)='./file0\x00', &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', 0x0, &(0x7f0000000180), 0x0, 0x0)
program did not crash
testing program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000000)='./file0\x00', &(0x7f0000000080)='./file0\x00', 0x0, 0x0, 0x0)
program did not crash
extracting C reproducer
testing compiled C program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
simplifying C reproducer
testing compiled C program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program did not crash
testing compiled C program (duration=33.21340792s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program did not crash
testing compiled C program (duration=33.21340792s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program did not crash
testing compiled C program (duration=33.21340792s, {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:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=33.21340792s, {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:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
reproducing took 28m32.071771101s
repro crashed as (corrupted=false):
RSP: 002b:00007ffd0ae3d728 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2cc00ac7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0ae3d7e0
RBP: 00007ffd0ae3d7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd0ae3e850
R13: 00005555775516c0 R14: 00007ffd0ae3e850 R15: 0000000000000001
---[ end trace 3d36ab41456401eb ]---
==================================================================
BUG: KASAN: null-ptr-deref in atomic_add_return include/asm-generic/atomic-instrumented.h:71 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:421
Write of size 4 at addr 0000000000000160 by task syz-executor501/336
CPU: 0 PID: 336 Comm: syz-executor501 Tainted: G W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack+0x1e/0x20 lib/dump_stack.c:77
dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
__kasan_report+0xe4/0x120 mm/kasan/report.c:520
kasan_report+0x30/0x60 mm/kasan/common.c:653
check_memory_region_inline mm/kasan/generic.c:141 [inline]
check_memory_region+0x274/0x280 mm/kasan/generic.c:191
__kasan_check_write+0x14/0x20 mm/kasan/common.c:99
atomic_add_return include/asm-generic/atomic-instrumented.h:71 [inline]
atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
ihold+0x20/0x60 fs/inode.c:421
d_delete_notify include/linux/fsnotify.h:227 [inline]
vfs_rmdir+0x247/0x3e0 fs/namei.c:4040
incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa0/0x100 fs/super.c:335
deactivate_super+0x14f/0x1d0 fs/super.c:366
cleanup_mnt+0x446/0x500 fs/namespace.c:1102
__cleanup_mnt+0x19/0x20 fs/namespace.c:1109
task_work_run+0x146/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x195/0x1b0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f2a2cc00ac7
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd0ae3d728 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2cc00ac7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0ae3d7e0
RBP: 00007ffd0ae3d7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd0ae3e850
R13: 00005555775516c0 R14: 00007ffd0ae3e850 R15: 0000000000000001
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000160
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 336 Comm: syz-executor501 Tainted: G B W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline]
RIP: 0010:atomic_add_return include/asm-generic/atomic-instrumented.h:72 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:421
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 61 c8 c5 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 a0 9c f3 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 60 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 81
RSP: 0018:ffff8881eef9fc40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881f32dcec0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffff8881eef9fc50 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0ca7a5c R11: 1ffffffff0ca7a5c R12: 1ffff1103b9bc9e2
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS: 0000555577550380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001ef7a6000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
d_delete_notify include/linux/fsnotify.h:227 [inline]
vfs_rmdir+0x247/0x3e0 fs/namei.c:4040
incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa0/0x100 fs/super.c:335
deactivate_super+0x14f/0x1d0 fs/super.c:366
cleanup_mnt+0x446/0x500 fs/namespace.c:1102
__cleanup_mnt+0x19/0x20 fs/namespace.c:1109
task_work_run+0x146/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x195/0x1b0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f2a2cc00ac7
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd0ae3d728 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2cc00ac7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0ae3d7e0
RBP: 00007ffd0ae3d7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd0ae3e850
R13: 00005555775516c0 R14: 00007ffd0ae3e850 R15: 0000000000000001
Modules linked in:
CR2: 0000000000000160
---[ end trace 3d36ab41456401ec ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline]
RIP: 0010:atomic_add_return include/asm-generic/atomic-instrumented.h:72 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:421
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 61 c8 c5 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 a0 9c f3 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 60 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 81
RSP: 0018:ffff8881eef9fc40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881f32dcec0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffff8881eef9fc50 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0ca7a5c R11: 1ffffffff0ca7a5c R12: 1ffff1103b9bc9e2
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS: 0000555577550380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001ef7a6000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 55 push %rbp
5: 48 89 e5 mov %rsp,%rbp
8: 41 56 push %r14
a: 53 push %rbx
b: 48 89 fb mov %rdi,%rbx
e: e8 61 c8 c5 ff call 0xffc5c874
13: 48 8d bb 60 01 00 00 lea 0x160(%rbx),%rdi
1a: be 04 00 00 00 mov $0x4,%esi
1f: e8 a0 9c f3 ff call 0xfff39cc4
24: 41 be 01 00 00 00 mov $0x1,%r14d
* 2a: f0 44 0f c1 b3 60 01 lock xadd %r14d,0x160(%rbx) <-- trapping instruction
31: 00 00
33: 41 ff c6 inc %r14d
36: bf 02 00 00 00 mov $0x2,%edi
3b: 44 89 f6 mov %r14d,%esi
3e: e8 .byte 0xe8
3f: 81 .byte 0x81
final repro crashed as (corrupted=false):
RSP: 002b:00007ffd0ae3d728 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2cc00ac7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0ae3d7e0
RBP: 00007ffd0ae3d7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd0ae3e850
R13: 00005555775516c0 R14: 00007ffd0ae3e850 R15: 0000000000000001
---[ end trace 3d36ab41456401eb ]---
==================================================================
BUG: KASAN: null-ptr-deref in atomic_add_return include/asm-generic/atomic-instrumented.h:71 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:421
Write of size 4 at addr 0000000000000160 by task syz-executor501/336
CPU: 0 PID: 336 Comm: syz-executor501 Tainted: G W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack+0x1e/0x20 lib/dump_stack.c:77
dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
__kasan_report+0xe4/0x120 mm/kasan/report.c:520
kasan_report+0x30/0x60 mm/kasan/common.c:653
check_memory_region_inline mm/kasan/generic.c:141 [inline]
check_memory_region+0x274/0x280 mm/kasan/generic.c:191
__kasan_check_write+0x14/0x20 mm/kasan/common.c:99
atomic_add_return include/asm-generic/atomic-instrumented.h:71 [inline]
atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
ihold+0x20/0x60 fs/inode.c:421
d_delete_notify include/linux/fsnotify.h:227 [inline]
vfs_rmdir+0x247/0x3e0 fs/namei.c:4040
incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa0/0x100 fs/super.c:335
deactivate_super+0x14f/0x1d0 fs/super.c:366
cleanup_mnt+0x446/0x500 fs/namespace.c:1102
__cleanup_mnt+0x19/0x20 fs/namespace.c:1109
task_work_run+0x146/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x195/0x1b0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f2a2cc00ac7
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd0ae3d728 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2cc00ac7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0ae3d7e0
RBP: 00007ffd0ae3d7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd0ae3e850
R13: 00005555775516c0 R14: 00007ffd0ae3e850 R15: 0000000000000001
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000160
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 336 Comm: syz-executor501 Tainted: G B W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline]
RIP: 0010:atomic_add_return include/asm-generic/atomic-instrumented.h:72 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:421
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 61 c8 c5 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 a0 9c f3 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 60 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 81
RSP: 0018:ffff8881eef9fc40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881f32dcec0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffff8881eef9fc50 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0ca7a5c R11: 1ffffffff0ca7a5c R12: 1ffff1103b9bc9e2
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS: 0000555577550380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001ef7a6000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
d_delete_notify include/linux/fsnotify.h:227 [inline]
vfs_rmdir+0x247/0x3e0 fs/namei.c:4040
incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa0/0x100 fs/super.c:335
deactivate_super+0x14f/0x1d0 fs/super.c:366
cleanup_mnt+0x446/0x500 fs/namespace.c:1102
__cleanup_mnt+0x19/0x20 fs/namespace.c:1109
task_work_run+0x146/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x195/0x1b0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f2a2cc00ac7
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd0ae3d728 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2a2cc00ac7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0ae3d7e0
RBP: 00007ffd0ae3d7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd0ae3e850
R13: 00005555775516c0 R14: 00007ffd0ae3e850 R15: 0000000000000001
Modules linked in:
CR2: 0000000000000160
---[ end trace 3d36ab41456401ec ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline]
RIP: 0010:atomic_add_return include/asm-generic/atomic-instrumented.h:72 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:421
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 61 c8 c5 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 a0 9c f3 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 60 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 81
RSP: 0018:ffff8881eef9fc40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881f32dcec0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffff8881eef9fc50 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0ca7a5c R11: 1ffffffff0ca7a5c R12: 1ffff1103b9bc9e2
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS: 0000555577550380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001ef7a6000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 55 push %rbp
5: 48 89 e5 mov %rsp,%rbp
8: 41 56 push %r14
a: 53 push %rbx
b: 48 89 fb mov %rdi,%rbx
e: e8 61 c8 c5 ff call 0xffc5c874
13: 48 8d bb 60 01 00 00 lea 0x160(%rbx),%rdi
1a: be 04 00 00 00 mov $0x4,%esi
1f: e8 a0 9c f3 ff call 0xfff39cc4
24: 41 be 01 00 00 00 mov $0x1,%r14d
* 2a: f0 44 0f c1 b3 60 01 lock xadd %r14d,0x160(%rbx) <-- trapping instruction
31: 00 00
33: 41 ff c6 inc %r14d
36: bf 02 00 00 00 mov $0x2,%edi
3b: 44 89 f6 mov %r14d,%esi
3e: e8 .byte 0xe8
3f: 81 .byte 0x81