syzbot


general protection fault in mark_buffer_dirty_inode

Status: upstream: reported on 2024/04/19 10:58
Reported-by: syzbot+04298256545591946a3d@syzkaller.appspotmail.com
First crash: 57d, last: 57d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 general protection fault in mark_buffer_dirty_inode (2) C error 1 565d 565d 0/1 upstream: reported C repro on 2022/11/28 03:52
linux-4.19 general protection fault in mark_buffer_dirty_inode 1 1504d 1504d 0/1 auto-closed as invalid on 2020/08/30 19:17
upstream general protection fault in mark_buffer_dirty_inode (2) udf C 32 406d 564d 22/27 fixed on 2023/06/08 14:41
android-49 general protection fault in mark_buffer_dirty_inode 2 2143d 2170d 0/3 auto-closed as invalid on 2019/02/22 14:57
upstream general protection fault in mark_buffer_dirty_inode exfat 1 1883d 1879d 0/27 auto-closed as invalid on 2019/10/16 22:48
android-54 KASAN: null-ptr-deref Write in mark_buffer_dirty_inode fat 1 499d 499d 0/2 auto-obsoleted due to no activity on 2023/06/02 15:38
linux-5.15 BUG: unable to handle kernel paging request in mark_buffer_dirty_inode origin:lts-only C 2 18d 18d 0/3 upstream: reported C repro on 2024/05/27 20:45

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 PID: 5630 Comm: syz-executor.4 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:mark_buffer_dirty_inode+0x4c/0x300 fs/buffer.c:573
Code: ff 48 83 c5 30 48 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 ef e8 83 ef e0 ff 4c 8b 75 00 49 8d 6d 10 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 65 ef e0 ff 48 8b 6d 00 48 83 c5
RSP: 0018:ffffc900036ff828 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90010873000 RSI: 00000000000083d1 RDI: 00000000000083d2
RBP: 0000000000000010 R08: ffffffff82fe86a1 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888055ca9050 R15: dffffc0000000000
FS:  00007fc40a9f66c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000156e9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_rename+0xb58/0x14d0 fs/udf/namei.c:1190
 vfs_rename+0xd32/0x10f0 fs/namei.c:4876
 do_renameat2+0xde0/0x1440 fs/namei.c:5029
 __do_sys_renameat2 fs/namei.c:5062 [inline]
 __se_sys_renameat2 fs/namei.c:5059 [inline]
 __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5059
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc40be7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc40a9f60c8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fc40bfac050 RCX: 00007fc40be7dea9
RDX: 0000000000000005 RSI: 0000000020000100 RDI: 0000000000000005
RBP: 00007fc40beca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc40bfac050 R15: 00007ffd471e7e38
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mark_buffer_dirty_inode+0x4c/0x300 fs/buffer.c:573
Code: ff 48 83 c5 30 48 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 ef e8 83 ef e0 ff 4c 8b 75 00 49 8d 6d 10 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 65 ef e0 ff 48 8b 6d 00 48 83 c5
RSP: 0018:ffffc900036ff828 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90010873000 RSI: 00000000000083d1 RDI: 00000000000083d2
RBP: 0000000000000010 R08: ffffffff82fe86a1 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888055ca9050 R15: dffffc0000000000
FS:  00007fc40a9f66c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff520f2f98 CR3: 00000000156e9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 83 c5 30          	add    $0x30,%rbp
   4:	48 89 e8             	mov    %rbp,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  10:	74 08                	je     0x1a
  12:	48 89 ef             	mov    %rbp,%rdi
  15:	e8 83 ef e0 ff       	call   0xffe0ef9d
  1a:	4c 8b 75 00          	mov    0x0(%rbp),%r14
  1e:	49 8d 6d 10          	lea    0x10(%r13),%rbp
  22:	48 89 e8             	mov    %rbp,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 ef             	mov    %rbp,%rdi
  33:	e8 65 ef e0 ff       	call   0xffe0ef9d
  38:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
  3c:	48                   	rex.W
  3d:	83                   	.byte 0x83
  3e:	c5                   	.byte 0xc5

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/19 10:57 linux-6.1.y 6741e066ec76 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in mark_buffer_dirty_inode
* Struck through repros no longer work on HEAD.