Extracting prog: 1m0.399352392s
Minimizing prog: 7m39.82991681s
Simplifying prog options: 0s
Extracting C: 30.27805029s
Simplifying C: 12m2.20086997s
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}}): mkdirat-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=33.082946884s, {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$bind
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
program did not crash
testing program (duration=33.082946884s, {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$incfs
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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}}): mount$bind-mount$incfs
detailed listing:
executing program 0:
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(0x0, &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', 0x0, 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', 0x0, &(0x7f0000000000), 0x0, 0x0)
program did not crash
testing program (duration=33.082946884s, {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, &(0x7f0000000280)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000080)='./file0\x00', &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0)
program did not crash
extracting C reproducer
testing compiled C program (duration=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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=33.082946884s, {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 21m12.708210963s
repro crashed as (corrupted=false):
RSP: 002b:00007ffeb08731a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe416d81a87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb0873260
RBP: 00007ffeb0873260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffeb08742d0
R13: 000055555c7cd6c0 R14: 00007ffeb08742d0 R15: 0000000000000001
---[ end trace 621f193e49a8fce9 ]---
==================================================================
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+0x1b/0x50 fs/inode.c:421
Write of size 4 at addr 0000000000000160 by task syz-executor554/351
CPU: 1 PID: 351 Comm: syz-executor554 Tainted: G W 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
__kasan_report+0xe9/0x120 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+0x272/0x280 mm/kasan/generic.c:191
atomic_add_return include/asm-generic/atomic-instrumented.h:71 [inline]
atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
ihold+0x1b/0x50 fs/inode.c:421
d_delete_notify include/linux/fsnotify.h:227 [inline]
vfs_rmdir+0x1e0/0x3c0 fs/namei.c:4040
incfs_kill_sb+0x105/0x200 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa8/0x110 fs/super.c:335
deactivate_super+0x1e2/0x2a0 fs/super.c:366
cleanup_mnt+0x44e/0x500 fs/namespace.c:1102
task_work_run+0x140/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fe416d81a87
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:00007ffeb08731a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe416d81a87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb0873260
RBP: 00007ffeb0873260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffeb08742d0
R13: 000055555c7cd6c0 R14: 00007ffeb08742d0 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: 1 PID: 351 Comm: syz-executor554 Tainted: G B W 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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+0x20/0x50 fs/inode.c:421
Code: 0f 1f 84 00 00 00 00 00 66 90 55 53 48 89 fb e8 46 d4 c2 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 d5 91 f2 ff bd 01 00 00 00 <f0> 0f c1 ab 60 01 00 00 ff c5 bf 02 00 00 00 89 ee e8 0a d7 c2 ff
RSP: 0018:ffff8881ef6e7ca0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881ef5f8fc0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: 0000000000000001 R08: ffffffff813ae535 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881eed330f0 R15: 0000000000000000
FS: 000055555c7cc380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001e064b000 CR4: 00000000003406a0
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+0x1e0/0x3c0 fs/namei.c:4040
incfs_kill_sb+0x105/0x200 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa8/0x110 fs/super.c:335
deactivate_super+0x1e2/0x2a0 fs/super.c:366
cleanup_mnt+0x44e/0x500 fs/namespace.c:1102
task_work_run+0x140/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fe416d81a87
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:00007ffeb08731a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe416d81a87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb0873260
RBP: 00007ffeb0873260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffeb08742d0
R13: 000055555c7cd6c0 R14: 00007ffeb08742d0 R15: 0000000000000001
Modules linked in:
CR2: 0000000000000160
---[ end trace 621f193e49a8fcea ]---
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+0x20/0x50 fs/inode.c:421
Code: 0f 1f 84 00 00 00 00 00 66 90 55 53 48 89 fb e8 46 d4 c2 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 d5 91 f2 ff bd 01 00 00 00 <f0> 0f c1 ab 60 01 00 00 ff c5 bf 02 00 00 00 89 ee e8 0a d7 c2 ff
RSP: 0018:ffff8881ef6e7ca0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881ef5f8fc0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: 0000000000000001 R08: ffffffff813ae535 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881eed330f0 R15: 0000000000000000
FS: 000055555c7cc380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001e064b000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
7: 00
8: 66 90 xchg %ax,%ax
a: 55 push %rbp
b: 53 push %rbx
c: 48 89 fb mov %rdi,%rbx
f: e8 46 d4 c2 ff call 0xffc2d45a
14: 48 8d bb 60 01 00 00 lea 0x160(%rbx),%rdi
1b: be 04 00 00 00 mov $0x4,%esi
20: e8 d5 91 f2 ff call 0xfff291fa
25: bd 01 00 00 00 mov $0x1,%ebp
* 2a: f0 0f c1 ab 60 01 00 lock xadd %ebp,0x160(%rbx) <-- trapping instruction
31: 00
32: ff c5 inc %ebp
34: bf 02 00 00 00 mov $0x2,%edi
39: 89 ee mov %ebp,%esi
3b: e8 0a d7 c2 ff call 0xffc2d74a
final repro crashed as (corrupted=false):
RSP: 002b:00007ffeb08731a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe416d81a87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb0873260
RBP: 00007ffeb0873260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffeb08742d0
R13: 000055555c7cd6c0 R14: 00007ffeb08742d0 R15: 0000000000000001
---[ end trace 621f193e49a8fce9 ]---
==================================================================
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+0x1b/0x50 fs/inode.c:421
Write of size 4 at addr 0000000000000160 by task syz-executor554/351
CPU: 1 PID: 351 Comm: syz-executor554 Tainted: G W 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
__kasan_report+0xe9/0x120 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+0x272/0x280 mm/kasan/generic.c:191
atomic_add_return include/asm-generic/atomic-instrumented.h:71 [inline]
atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
ihold+0x1b/0x50 fs/inode.c:421
d_delete_notify include/linux/fsnotify.h:227 [inline]
vfs_rmdir+0x1e0/0x3c0 fs/namei.c:4040
incfs_kill_sb+0x105/0x200 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa8/0x110 fs/super.c:335
deactivate_super+0x1e2/0x2a0 fs/super.c:366
cleanup_mnt+0x44e/0x500 fs/namespace.c:1102
task_work_run+0x140/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fe416d81a87
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:00007ffeb08731a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe416d81a87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb0873260
RBP: 00007ffeb0873260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffeb08742d0
R13: 000055555c7cd6c0 R14: 00007ffeb08742d0 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: 1 PID: 351 Comm: syz-executor554 Tainted: G B W 5.4.289-syzkaller-00011-g39762b7a60e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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+0x20/0x50 fs/inode.c:421
Code: 0f 1f 84 00 00 00 00 00 66 90 55 53 48 89 fb e8 46 d4 c2 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 d5 91 f2 ff bd 01 00 00 00 <f0> 0f c1 ab 60 01 00 00 ff c5 bf 02 00 00 00 89 ee e8 0a d7 c2 ff
RSP: 0018:ffff8881ef6e7ca0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881ef5f8fc0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: 0000000000000001 R08: ffffffff813ae535 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881eed330f0 R15: 0000000000000000
FS: 000055555c7cc380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001e064b000 CR4: 00000000003406a0
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+0x1e0/0x3c0 fs/namei.c:4040
incfs_kill_sb+0x105/0x200 fs/incfs/vfs.c:1944
deactivate_locked_super+0xa8/0x110 fs/super.c:335
deactivate_super+0x1e2/0x2a0 fs/super.c:366
cleanup_mnt+0x44e/0x500 fs/namespace.c:1102
task_work_run+0x140/0x170 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fe416d81a87
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:00007ffeb08731a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe416d81a87
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeb0873260
RBP: 00007ffeb0873260 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffeb08742d0
R13: 000055555c7cd6c0 R14: 00007ffeb08742d0 R15: 0000000000000001
Modules linked in:
CR2: 0000000000000160
---[ end trace 621f193e49a8fcea ]---
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+0x20/0x50 fs/inode.c:421
Code: 0f 1f 84 00 00 00 00 00 66 90 55 53 48 89 fb e8 46 d4 c2 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 d5 91 f2 ff bd 01 00 00 00 <f0> 0f c1 ab 60 01 00 00 ff c5 bf 02 00 00 00 89 ee e8 0a d7 c2 ff
RSP: 0018:ffff8881ef6e7ca0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881ef5f8fc0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: 0000000000000001 R08: ffffffff813ae535 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881eed330f0 R15: 0000000000000000
FS: 000055555c7cc380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001e064b000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
7: 00
8: 66 90 xchg %ax,%ax
a: 55 push %rbp
b: 53 push %rbx
c: 48 89 fb mov %rdi,%rbx
f: e8 46 d4 c2 ff call 0xffc2d45a
14: 48 8d bb 60 01 00 00 lea 0x160(%rbx),%rdi
1b: be 04 00 00 00 mov $0x4,%esi
20: e8 d5 91 f2 ff call 0xfff291fa
25: bd 01 00 00 00 mov $0x1,%ebp
* 2a: f0 0f c1 ab 60 01 00 lock xadd %ebp,0x160(%rbx) <-- trapping instruction
31: 00
32: ff c5 inc %ebp
34: bf 02 00 00 00 mov $0x2,%edi
39: 89 ee mov %ebp,%esi
3b: e8 0a d7 c2 ff call 0xffc2d74a