Aug  4 15:36:27 syzkaller kern.alert kernel: [   40.011928][  T548] Write-error on swap-device (8:0:787838)
Aug  4 1[   40.224735][  T552] overlayfs: upper fs does not support tmpfile.
5:36:27 syzkaller kern.alert kernel: [   40.019674][  T548] Write-error on swap-device (8:0:787846)
Aug  4 15:36:27 syzkaller k[   40.244082][  T295] ------------[ cut here ]------------
ern.alert kernel[   40.250996][  T295] WARNING: CPU: 0 PID: 295 at fs/inode.c:340 drop_nlink+0xce/0x110 fs/inode.c:340
: [   40.027182][   40.261079][  T295] Modules linked in:
[  T548] Write-e[   40.266479][  T295] CPU: 0 UID: 0 PID: 295 Comm: syz-executor Not tainted syzkaller #0 1c659cfea3877f078df945e50c8eb7045fd035a9
rror on swap-dev[   40.280492][  T295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
ice (8:0:787854)[   40.293977][  T295] RIP: 0010:drop_nlink+0xce/0x110 fs/inode.c:340

Aug  4 15:36:28 [   41.023028][   T92] SELinux: inode_doinit_use_xattr:  getxattr returned 5 for dev=sda1 ino=2001
syzkaller kern.a[   41.030333][  T295] R10: dffffc0000000000 R11: fffffbfff1176d29 R12: 0000000000000000
lert kernel: [  [   41.030351][  T295] R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
 40.904955][  T2[   41.030367][  T295] FS:  00005555911f4500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
95] BUG: kernel [   41.030418][  T295] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
NULL pointer der[   41.030477][  T295] CR2: 0000000000000168 CR3: 00000001316c4000 CR4: 00000000003526b0
eference, addres[   41.030566][  T295] DR0: 0000000000000000 DR1: 0000000000000071 DR2: 0000000000000000
s: 0000000000000[   41.030652][  T295]  <TASK>
168
Aug  4 15:36:28 [   41.155918][  T295]  task_work_run+0x1e8/0x260 kernel/task_work.c:246
syzkaller kern.a[   41.156725][   T92] SELinux: inode_doinit_use_xattr:  getxattr returned 5 for dev=sda1 ino=2001
lert kernel: [  [   41.162531][  T295]  ? ksys_umount fs/namespace.c:2053 [inline]
lert kernel: [  [   41.162531][  T295]  ? __do_sys_umount fs/namespace.c:2058 [inline]
lert kernel: [  [   41.162531][  T295]  ? __se_sys_umount fs/namespace.c:2056 [inline]
lert kernel: [  [   41.162531][  T295]  ? __x64_sys_umount+0x12e/0x180 fs/namespace.c:2056
 40.913327][  T2[   41.162765][  T295]  resume_user_mode_work+0x35/0x50 include/linux/resume_user_mode.h:50
95] #PF: supervi[   41.205687][  T295]  exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
95] #PF: supervi[   41.205687][  T295]  exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
95] #PF: supervi[   41.205687][  T295]  __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
95] #PF: supervi[   41.205687][  T295]  syscall_exit_to_user_mode+0x63/0xb0 kernel/entry/common.c:218
sor write access[   41.222703][  T295]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
 in kernel mode[   41.230086][  T295] RIP: 0033:0x7f35d259f257

Aug  4 15:36:28[   41.236394][  T295] Code: a2 c7 05 9c 44 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
 syzkaller kern.[   41.258392][  T295] RSP: 002b:00007fff837a0c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
alert kernel: [ [   41.268828][  T295] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f35d259f257
  40.919883][  T[   41.279092][  T295] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff837a0cc0
295] #PF: error_[   41.289588][  T295] RBP: 00007fff837a0cc0 R08: 00007fff837a1cc0 R09: 00000000ffffffff
code(0x0002) - n[   41.299567][  T295] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff837a1d50
ot-present page[   41.309871][  T295] R13: 00007f35d263445c R14: 0000000000009cfd R15: 00007fff837a1d90