syzbot


kernel BUG in __ext4_journal_stop

Status: upstream: reported C repro on 2023/07/17 08:36
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+178918fce2b18002808f@syzkaller.appspotmail.com
First crash: 338d, last: 31d
Bug presence (1)
Date Name Commit Repro Result
2023/07/17 upstream (ToT) fdf0eaf11452 C [report] kernel BUG in ext4_do_writepages
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 kernel BUG in __ext4_journal_stop origin:upstream C error 2 55d 451d 0/3 upstream: reported C repro on 2023/03/26 14:44
upstream kernel BUG in __ext4_journal_stop ext4 C error done 20 26d 569d 0/27 upstream: reported C repro on 2022/11/28 10:23
android-6-1 kernel BUG in __ext4_journal_stop origin:upstream C error 2 12d 382d 0/2 upstream: reported C repro on 2023/06/03 10:54
android-5-15 kernel BUG in __ext4_journal_stop ext4 origin:upstream C error 7 29d 570d 0/2 upstream: reported C repro on 2022/11/27 03:57
Fix bisection attempts (8)
Created Duration User Patch Repo Result
2024/05/18 20:04 1h14m bisect fix linux-6.1.y job log (0) log
2024/04/13 01:53 2h43m bisect fix linux-6.1.y job log (0) log
2024/03/11 04:19 1h10m bisect fix linux-6.1.y job log (0) log
2024/02/01 17:07 1h03m bisect fix linux-6.1.y job log (0) log
2023/12/29 18:17 1h27m bisect fix linux-6.1.y job log (0) log
2023/11/28 20:00 1h44m bisect fix linux-6.1.y job log (0) log
2023/10/28 08:02 1h12m bisect fix linux-6.1.y job log (0) log
2023/09/25 10:29 1h19m bisect fix linux-6.1.y job log (0) log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4_jbd2.c:53!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4165 Comm: syz-executor247 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
RIP: 0010:__ext4_journal_stop+0x18b/0x190 fs/ext4/ext4_jbd2.c:116
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 11 ff ff ff e8 3f 29 b0 ff e9 07 ff ff ff e8 85 c3 59 ff <0f> 0b 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 89 d5 89
RSP: 0018:ffffc9000495f200 EFLAGS: 00010293
RAX: ffffffff823017bb RBX: 0000000000000000 RCX: ffff8880206bbb80
RDX: 0000000000000000 RSI: 000000000000032c RDI: ffffffff8c7a3fb3
RBP: 000000000000032c R08: ffffffff8235ecd3 R09: fffffbfff1ca6a76
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100df9c7c8
R13: 0000000000000008 R14: 1ffff1100df9c7e6 R15: ffffffff8c7a3fb3
FS:  00007f7c4446c6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffbde21158 CR3: 0000000070ec5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_write_inline_data_end+0xa6a/0x10c0 fs/ext4/inline.c:812
 generic_perform_write+0x3e9/0x5e0 mm/filemap.c:3765
 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
 ext4_file_write_iter+0x1d2/0x18f0
 do_iter_write+0x6e6/0xc50 fs/read_write.c:861
 iter_file_splice_write+0x806/0xfa0 fs/splice.c:686
 do_splice_from fs/splice.c:764 [inline]
 direct_splice_actor+0xe3/0x1c0 fs/splice.c:931
 splice_direct_to_actor+0x4c0/0xbd0 fs/splice.c:886
 do_splice_direct+0x27f/0x3c0 fs/splice.c:974
 do_sendfile+0x61c/0xff0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7c4c7d1aa9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007f7c4446c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7c4c8596f8 RCX: 00007f7c4c7d1aa9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f7c4c8596f0 R08: 00007fffbde21177 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00007f7c4c825840
R13: 00007f7c4c8250c0 R14: 0000000020000f40 R15: 0030656c69662f2e
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
RIP: 0010:__ext4_journal_stop+0x18b/0x190 fs/ext4/ext4_jbd2.c:116
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 11 ff ff ff e8 3f 29 b0 ff e9 07 ff ff ff e8 85 c3 59 ff <0f> 0b 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 89 d5 89
RSP: 0018:ffffc9000495f200 EFLAGS: 00010293
RAX: ffffffff823017bb RBX: 0000000000000000 RCX: ffff8880206bbb80
RDX: 0000000000000000 RSI: 000000000000032c RDI: ffffffff8c7a3fb3
RBP: 000000000000032c R08: ffffffff8235ecd3 R09: fffffbfff1ca6a76
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100df9c7c8
R13: 0000000000000008 R14: 1ffff1100df9c7e6 R15: ffffffff8c7a3fb3
FS:  00007f7c4446c6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c4446c000 CR3: 0000000070ec5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/17 08:35 linux-6.1.y 61fd484b2cf6 35d9ecc5 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in __ext4_journal_stop
* Struck through repros no longer work on HEAD.