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:00007ffc74791b58 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff5caa72d07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc74791c10
RBP: 00007ffc74791c10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffc74792d00
R13: 0000555555d56800 R14: 431bde82d7b634db R15: 00007ffc74793d90
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:452
Write of size 4 at addr 0000000000000170 by task syz-executor124/294
CPU: 0 PID: 294 Comm: syz-executor124 Tainted: G W 6.1.75-syzkaller-00015-gbe55946e207c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
print_report+0xe1/0x4e0 mm/kasan/report.c:430
kasan_report+0x13c/0x170 mm/kasan/report.c:531
kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189
__kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline]
ihold+0x20/0x60 fs/inode.c:452
d_delete_notify include/linux/fsnotify.h:281 [inline]
vfs_rmdir+0x268/0x500 fs/namei.c:4211
incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1962
deactivate_locked_super+0xad/0x110 fs/super.c:334
deactivate_super+0xbe/0xf0 fs/super.c:365
cleanup_mnt+0x485/0x510 fs/namespace.c:1186
__cleanup_mnt+0x19/0x20 fs/namespace.c:1193
task_work_run+0x24d/0x2e0 kernel/task_work.c:179
ptrace_notify+0x29e/0x350 kernel/signal.c:2376
ptrace_report_syscall include/linux/ptrace.h:420 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]
syscall_exit_work kernel/entry/common.c:252 [inline]
syscall_exit_to_user_mode_prepare kernel/entry/common.c:279 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:284 [inline]
syscall_exit_to_user_mode+0xa2/0x140 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff5caa72d07
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:00007ffc74791b58 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff5caa72d07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc74791c10
RBP: 00007ffc74791c10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffc74792d00
R13: 0000555555d56800 R14: 431bde82d7b634db R15: 00007ffc74793d90
==================================================================
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: 294 Comm: syz-executor124 Tainted: G B W 6.1.75-syzkaller-00015-gbe55946e207c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:440 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline]
RIP: 0010:ihold+0x25/0x60 fs/inode.c:452
Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 f1 47 a9 ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 b0 2a f0 ff bb 01 00 00 00 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 74 4b a9
RSP: 0018:ffffc90000e67b70 EFLAGS: 00010246
RAX: ffff8881095a3c00 RBX: 0000000000000001 RCX: ffff8881095a3cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e67b80 R08: ffffffff814470c3 R09: fffffbfff0ee5efd
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11022574547
R13: ffff88811f4d2aa0 R14: 0000000000000000 R15: 1ffff11023e9a55a
FS: 0000555555d4d480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 0000000121675000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
d_delete_notify include/linux/fsnotify.h:281 [inline]
vfs_rmdir+0x268/0x500 fs/namei.c:4211
incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1962
deactivate_locked_super+0xad/0x110 fs/super.c:334
deactivate_super+0xbe/0xf0 fs/super.c:365
cleanup_mnt+0x485/0x510 fs/namespace.c:1186
__cleanup_mnt+0x19/0x20 fs/namespace.c:1193
task_work_run+0x24d/0x2e0 kernel/task_work.c:179
ptrace_notify+0x29e/0x350 kernel/signal.c:2376
ptrace_report_syscall include/linux/ptrace.h:420 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]
syscall_exit_work kernel/entry/common.c:252 [inline]
syscall_exit_to_user_mode_prepare kernel/entry/common.c:279 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:284 [inline]
syscall_exit_to_user_mode+0xa2/0x140 kernel/entry/common.c:297
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff5caa72d07
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:00007ffc74791b58 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff5caa72d07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc74791c10
RBP: 00007ffc74791c10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffc74792d00
R13: 0000555555d56800 R14: 431bde82d7b634db R15: 00007ffc74793d90
Modules linked in:
CR2: 0000000000000170
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:440 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline]
RIP: 0010:ihold+0x25/0x60 fs/inode.c:452
Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 f1 47 a9 ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 b0 2a f0 ff bb 01 00 00 00 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 74 4b a9
RSP: 0018:ffffc90000e67b70 EFLAGS: 00010246
RAX: ffff8881095a3c00 RBX: 0000000000000001 RCX: ffff8881095a3cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e67b80 R08: ffffffff814470c3 R09: fffffbfff0ee5efd
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11022574547
R13: ffff88811f4d2aa0 R14: 0000000000000000 R15: 1ffff11023e9a55a
FS: 0000555555d4d480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 0000000121675000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 48 83 c4 08 add $0x8,%rsp
4: 5b pop %rbx
5: 5d pop %rbp
6: c3 ret
7: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
e: 00 00 00
11: c3 ret
12: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
19: 00 00 00
1c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
21: b8 a6 00 00 00 mov $0xa6,%eax
26: 0f 05 syscall
* 28: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
2e: 77 01 ja 0x31
30: c3 ret
31: 48 c7 c2 b8 ff ff ff mov $0xffffffffffffffb8,%rdx
38: f7 d8 neg %eax
3a: 64 89 02 mov %eax,%fs:(%rdx)
3d: b8 .byte 0xb8