Extracting prog: 1m10.828089007s
Minimizing prog: 7m9.663611765s
Simplifying prog options: 0s
Extracting C: 23.381700271s
Simplifying C: 11m20.410265099s


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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 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=34.305959713s, {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}}): mkdir-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(0x0, 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(0x0, &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', 0x0, 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', 0x0, &(0x7f0000000040), 0x0, 0x0)

program did not crash
testing program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000000540)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000000)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
simplifying C reproducer
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program did not crash
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program did not crash
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program did not crash
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=34.305959713s, {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}}): mkdir-mount$bind-mount$incfs
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
reproducing took 20m4.283686412s
repro crashed as (corrupted=false):
R13: 000055557cf836c0 R14: 00007ffd4e4d5380 R15: 0000000000000001
 </TASK>
---[ end trace 6b84121080844964 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:426
Write of size 4 at addr 0000000000000170 by task syz-executor338/291

CPU: 1 PID: 291 Comm: syz-executor338 Tainted: G        W         5.15.173-syzkaller-00161-gb4bd207b0380 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:431 [inline]
 kasan_report+0x16f/0x1c0 mm/kasan/report.c:444
 kasan_check_range+0x293/0x2a0 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_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
 ihold+0x20/0x60 fs/inode.c:426
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x201/0x470 fs/namei.c:4162
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150
 task_work_run+0x129/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1f9e196a47
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:00007ffd4e4d4258 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1f9e196a47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd4e4d4310
RBP: 00007ffd4e4d4310 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd4e4d5380
R13: 000055557cf836c0 R14: 00007ffd4e4d5380 R15: 0000000000000001
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000170
#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: 291 Comm: syz-executor338 Tainted: G    B   W         5.15.173-syzkaller-00161-gb4bd207b0380 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x25/0x60 fs/inode.c:426
Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 61 92 ae ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 80 ec f0 ff bb 01 00 00 00 <f0> 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 e4 95 ae
RSP: 0018:ffffc900009d7cc8 EFLAGS: 00010246
RAX: ffff888122f70000 RBX: 0000000000000001 RCX: ffff888122f70000
RDX: 0000000000000000 RSI: 0000000000000286 RDI: 00000000ffffffff
RBP: ffffc900009d7cd8 R08: ffffffff8141a43b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888120a62cc0 R14: 0000000000000000 R15: 1ffff1102414c59e
FS:  000055557cf82380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 00000001063e6000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x201/0x470 fs/namei.c:4162
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150
 task_work_run+0x129/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1f9e196a47
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:00007ffd4e4d4258 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1f9e196a47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd4e4d4310
RBP: 00007ffd4e4d4310 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd4e4d5380
R13: 000055557cf836c0 R14: 00007ffd4e4d5380 R15: 0000000000000001
 </TASK>
Modules linked in:
CR2: 0000000000000170
---[ end trace 6b84121080844965 ]---
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x25/0x60 fs/inode.c:426
Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 61 92 ae ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 80 ec f0 ff bb 01 00 00 00 <f0> 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 e4 95 ae
RSP: 0018:ffffc900009d7cc8 EFLAGS: 00010246
RAX: ffff888122f70000 RBX: 0000000000000001 RCX: ffff888122f70000
RDX: 0000000000000000 RSI: 0000000000000286 RDI: 00000000ffffffff
RBP: ffffc900009d7cd8 R08: ffffffff8141a43b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888120a62cc0 R14: 0000000000000000 R15: 1ffff1102414c59e
FS:  000055557cf82380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 00000001063e6000 CR4: 00000000003506a0
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:	00 55 48             	add    %dl,0x48(%rbp)
   7:	89 e5                	mov    %esp,%ebp
   9:	41 56                	push   %r14
   b:	53                   	push   %rbx
   c:	49 89 fe             	mov    %rdi,%r14
   f:	e8 61 92 ae ff       	call   0xffae9275
  14:	49 8d be 70 01 00 00 	lea    0x170(%r14),%rdi
  1b:	be 04 00 00 00       	mov    $0x4,%esi
  20:	e8 80 ec f0 ff       	call   0xfff0eca5
  25:	bb 01 00 00 00       	mov    $0x1,%ebx
* 2a:	f0 41 0f c1 9e 70 01 	lock xadd %ebx,0x170(%r14) <-- trapping instruction
  31:	00 00
  33:	ff c3                	inc    %ebx
  35:	bf 02 00 00 00       	mov    $0x2,%edi
  3a:	89 de                	mov    %ebx,%esi
  3c:	e8                   	.byte 0xe8
  3d:	e4 95                	in     $0x95,%al
  3f:	ae                   	scas   %es:(%rdi),%al

final repro crashed as (corrupted=false):
R13: 000055557cf836c0 R14: 00007ffd4e4d5380 R15: 0000000000000001
 </TASK>
---[ end trace 6b84121080844964 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:426
Write of size 4 at addr 0000000000000170 by task syz-executor338/291

CPU: 1 PID: 291 Comm: syz-executor338 Tainted: G        W         5.15.173-syzkaller-00161-gb4bd207b0380 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:431 [inline]
 kasan_report+0x16f/0x1c0 mm/kasan/report.c:444
 kasan_check_range+0x293/0x2a0 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_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
 ihold+0x20/0x60 fs/inode.c:426
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x201/0x470 fs/namei.c:4162
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150
 task_work_run+0x129/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1f9e196a47
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:00007ffd4e4d4258 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1f9e196a47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd4e4d4310
RBP: 00007ffd4e4d4310 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd4e4d5380
R13: 000055557cf836c0 R14: 00007ffd4e4d5380 R15: 0000000000000001
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000170
#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: 291 Comm: syz-executor338 Tainted: G    B   W         5.15.173-syzkaller-00161-gb4bd207b0380 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x25/0x60 fs/inode.c:426
Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 61 92 ae ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 80 ec f0 ff bb 01 00 00 00 <f0> 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 e4 95 ae
RSP: 0018:ffffc900009d7cc8 EFLAGS: 00010246
RAX: ffff888122f70000 RBX: 0000000000000001 RCX: ffff888122f70000
RDX: 0000000000000000 RSI: 0000000000000286 RDI: 00000000ffffffff
RBP: ffffc900009d7cd8 R08: ffffffff8141a43b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888120a62cc0 R14: 0000000000000000 R15: 1ffff1102414c59e
FS:  000055557cf82380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 00000001063e6000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x201/0x470 fs/namei.c:4162
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150
 task_work_run+0x129/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1f9e196a47
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:00007ffd4e4d4258 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1f9e196a47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd4e4d4310
RBP: 00007ffd4e4d4310 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd4e4d5380
R13: 000055557cf836c0 R14: 00007ffd4e4d5380 R15: 0000000000000001
 </TASK>
Modules linked in:
CR2: 0000000000000170
---[ end trace 6b84121080844965 ]---
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x25/0x60 fs/inode.c:426
Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 61 92 ae ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 80 ec f0 ff bb 01 00 00 00 <f0> 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 e4 95 ae
RSP: 0018:ffffc900009d7cc8 EFLAGS: 00010246
RAX: ffff888122f70000 RBX: 0000000000000001 RCX: ffff888122f70000
RDX: 0000000000000000 RSI: 0000000000000286 RDI: 00000000ffffffff
RBP: ffffc900009d7cd8 R08: ffffffff8141a43b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888120a62cc0 R14: 0000000000000000 R15: 1ffff1102414c59e
FS:  000055557cf82380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 00000001063e6000 CR4: 00000000003506a0
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:	00 55 48             	add    %dl,0x48(%rbp)
   7:	89 e5                	mov    %esp,%ebp
   9:	41 56                	push   %r14
   b:	53                   	push   %rbx
   c:	49 89 fe             	mov    %rdi,%r14
   f:	e8 61 92 ae ff       	call   0xffae9275
  14:	49 8d be 70 01 00 00 	lea    0x170(%r14),%rdi
  1b:	be 04 00 00 00       	mov    $0x4,%esi
  20:	e8 80 ec f0 ff       	call   0xfff0eca5
  25:	bb 01 00 00 00       	mov    $0x1,%ebx
* 2a:	f0 41 0f c1 9e 70 01 	lock xadd %ebx,0x170(%r14) <-- trapping instruction
  31:	00 00
  33:	ff c3                	inc    %ebx
  35:	bf 02 00 00 00       	mov    $0x2,%edi
  3a:	89 de                	mov    %ebx,%esi
  3c:	e8                   	.byte 0xe8
  3d:	e4 95                	in     $0x95,%al
  3f:	ae                   	scas   %es:(%rdi),%al