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KASAN: null-ptr-deref Write in vfs_rmdir

Status: upstream: reported C repro on 2024/04/11 09:39
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+4e62caa04a7928cf10c7@syzkaller.appspotmail.com
First crash: 177d, last: 1h18m
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/04/12 android14-6.1 (ToT) 354782156070 C [report] KASAN: null-ptr-deref Write in vfs_rmdir
2024/04/12 lts (merge base) 883d1a956208 C Didn't crash
2024/04/12 upstream (ToT) 586b5dfb51b9 C Didn't crash
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 KASAN: null-ptr-deref Write in vfs_rmdir origin:downstream C 4906 12h26m 177d 0/2 upstream: reported C repro on 2024/04/11 17:58
android-54 KASAN: null-ptr-deref Write in vfs_rmdir C 137 48d 177d 0/2 upstream: reported C repro on 2024/04/11 05:33
android-5-10 KASAN: null-ptr-deref Write in vfs_rmdir C 13746 21m 177d 0/2 upstream: reported C repro on 2024/04/11 05:14
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/06/21 07:45 14m retest repro android14-6.1 report log
2024/05/29 09:28 14m retest repro android14-6.1 report log
2024/05/29 09:28 10m retest repro android14-6.1 report log

Sample crash report:
R13: 0000555556e066c0 R14: 00007fffc383ebc0 R15: 0000000000000001
 </TASK>
---[ 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-executor238/297

CPU: 0 PID: 297 Comm: syz-executor238 Tainted: G        W          6.1.90-syzkaller-00003-gbe8ff39d2e99 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __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:283 [inline]
 vfs_rmdir+0x268/0x500 fs/namei.c:4205
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1995
 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:258 [inline]
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:285 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x99/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff9a94079a7
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:00007fffc383da98 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff9a94079a7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffc383db50
RBP: 00007fffc383db50 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007fffc383ebc0
R13: 0000555556e066c0 R14: 00007fffc383ebc0 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: 0 PID: 297 Comm: syz-executor238 Tainted: G    B   W          6.1.90-syzkaller-00003-gbe8ff39d2e99 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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 d1 bf a8 ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 a0 df ef 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 54 c3 a8
RSP: 0018:ffffc90000e27b70 EFLAGS: 00010246
RAX: ffff88811d658000 RBX: 0000000000000001 RCX: ffff88811d658000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e27b80 R08: ffffffff814495f3 R09: fffffbfff0f2d6fd
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110247d8cce
R13: ffff88811cfcfee0 R14: 0000000000000000 R15: 1ffff110239f9fe2
FS:  0000555556e05380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 00000001213cf000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:283 [inline]
 vfs_rmdir+0x268/0x500 fs/namei.c:4205
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1995
 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:258 [inline]
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:285 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x99/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff9a94079a7
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:00007fffc383da98 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff9a94079a7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffc383db50
RBP: 00007fffc383db50 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000202 R12: 00007fffc383ebc0
R13: 0000555556e066c0 R14: 00007fffc383ebc0 R15: 0000000000000001
 </TASK>
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 d1 bf a8 ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 a0 df ef 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 54 c3 a8
RSP: 0018:ffffc90000e27b70 EFLAGS: 00010246
RAX: ffff88811d658000 RBX: 0000000000000001 RCX: ffff88811d658000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e27b80 R08: ffffffff814495f3 R09: fffffbfff0f2d6fd
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110247d8cce
R13: ffff88811cfcfee0 R14: 0000000000000000 R15: 1ffff110239f9fe2
FS:  0000555556e05380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 00000001213cf000 CR4: 00000000003506b0
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 d1 bf a8 ff       	call   0xffa8bfe5
  14:	49 8d be 70 01 00 00 	lea    0x170(%r14),%rdi
  1b:	be 04 00 00 00       	mov    $0x4,%esi
  20:	e8 a0 df ef ff       	call   0xffefdfc5
  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:	54                   	push   %rsp
  3e:	c3                   	ret
  3f:	a8                   	.byte 0xa8

Crashes (3986):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/09 15:22 android14-6.1 be8ff39d2e99 a83d9288 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/07/15 01:54 android14-6.1 96d66062d076 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/07/13 04:33 android14-6.1 96d66062d076 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/07/13 03:31 android14-6.1 96d66062d076 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/07/13 02:27 android14-6.1 96d66062d076 eaeb5c15 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/04/12 00:47 android14-6.1 ca4095789fda 95ed9ece .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/04/11 10:32 android14-6.1 be55946e207c 33b9e058 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/04/11 09:34 android14-6.1 be55946e207c 33b9e058 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/06 01:01 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/05 21:44 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/05 14:34 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/05 14:32 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/05 06:53 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/04 21:42 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/04 05:02 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/03 15:43 android14-6.1 6f2e0215d71c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/03 06:13 android14-6.1 1cdc168f1ef0 a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/03 03:11 android14-6.1 1cdc168f1ef0 a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/02 17:58 android14-6.1 1cdc168f1ef0 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/02 14:20 android14-6.1 1cdc168f1ef0 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/02 11:59 android14-6.1 1cdc168f1ef0 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/02 05:39 android14-6.1 1cdc168f1ef0 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/02 01:27 android14-6.1 1cdc168f1ef0 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/02 01:27 android14-6.1 1cdc168f1ef0 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/01 12:08 android14-6.1 a43e7c2c12af ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/10/01 07:55 android14-6.1 5162f9a67b7d bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/30 19:42 android14-6.1 5162f9a67b7d bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/30 12:54 android14-6.1 110595418159 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/30 12:54 android14-6.1 110595418159 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/30 08:44 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/30 06:40 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/30 05:36 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/29 15:57 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/29 13:03 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/29 08:42 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/28 10:43 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/28 07:45 android14-6.1 110595418159 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/27 23:19 android14-6.1 5a912daf8731 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/27 20:42 android14-6.1 5a912daf8731 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/27 18:18 android14-6.1 5a912daf8731 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/27 12:18 android14-6.1 5a912daf8731 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 22:56 android14-6.1 bcc435d3749c 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 22:56 android14-6.1 bcc435d3749c 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 18:59 android14-6.1 9e167c1c27c5 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 16:45 android14-6.1 9e167c1c27c5 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 11:13 android14-6.1 9e167c1c27c5 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 08:53 android14-6.1 9e167c1c27c5 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 06:48 android14-6.1 9e167c1c27c5 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 06:44 android14-6.1 9e167c1c27c5 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/26 05:37 android14-6.1 9e167c1c27c5 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/25 22:44 android14-6.1 9e167c1c27c5 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/09/25 09:51 android14-6.1 03b93dc707ed 349a68c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
2024/04/11 09:06 android14-6.1 be55946e207c 33b9e058 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: null-ptr-deref Write in vfs_rmdir
* Struck through repros no longer work on HEAD.