syzbot


kernel BUG in __ext4_journal_stop

Status: upstream: reported C repro on 2022/11/28 10:23
Reported-by: syzbot+bdab24d5bf96d57c50b0@syzkaller.appspotmail.com
First crash: 70d, last: 29d

Cause bisection: failed (bisect log)
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 kernel BUG in __ext4_journal_stop ext4 C error 4 4d23h 71d 0/2 upstream: reported C repro on 2022/11/27 03:57

Sample crash report:
loop0: detected capacity change from 0 to 2048
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4_jbd2.c:53!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3634 Comm: syz-executor383 Not tainted 6.1.0-rc6-syzkaller-00375-gcf562a45a0d5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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 cb af ff e9 07 ff ff ff e8 85 b1 5b 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:ffffc90003cef840 EFLAGS: 00010293
RAX: ffffffff822ee66b RBX: 0000000000000000 RCX: ffff888024c81d40
RDX: 0000000000000000 RSI: 0000000000000323 RDI: ffffffff8cabd2f1
RBP: 0000000000000323 R08: ffffffff8234d69d R09: fffffbfff1cebdfe
R10: fffffbfff1cebdfe R11: 1ffffffff1cebdfd R12: ffff888074426750
R13: 1ffff1100e884cea R14: 0000000000000012 R15: ffffffff8cabd2f1
FS:  00007f91dbeb5700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91dbe94718 CR3: 000000002916b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_write_inline_data_end+0x743/0xcd0 fs/ext4/inline.c:803
 generic_perform_write+0x3dc/0x5e0 mm/filemap.c:3764
 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
 ext4_file_write_iter+0x1d0/0x18d0
 call_write_iter include/linux/fs.h:2199 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7dc/0xc50 fs/read_write.c:584
 ksys_write+0x177/0x2a0 fs/read_write.c:637
 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: 0033:0x7f91dbf09579
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f91dbeb52f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f91dbf8e7a0 RCX: 00007f91dbf09579
RDX: 0000000000000009 RSI: 0000000020000f80 RDI: 0000000000000004
RBP: 00007f91dbf5b828 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f91dbf5b0c0
R13: 0000000020000800 R14: 0030656c69662f2e R15: 00007f91dbf8e7a8
 </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 cb af ff e9 07 ff ff ff e8 85 b1 5b 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:ffffc90003cef840 EFLAGS: 00010293
RAX: ffffffff822ee66b RBX: 0000000000000000 RCX: ffff888024c81d40
RDX: 0000000000000000 RSI: 0000000000000323 RDI: ffffffff8cabd2f1
RBP: 0000000000000323 R08: ffffffff8234d69d R09: fffffbfff1cebdfe
R10: fffffbfff1cebdfe R11: 1ffffffff1cebdfd R12: ffff888074426750
R13: 1ffff1100e884cea R14: 0000000000000012 R15: ffffffff8cabd2f1
FS:  00007f91dbeb5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000204 CR3: 000000002916b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-upstream-fs 2022/11/28 10:04 upstream cf562a45a0d5 f4470a7b .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] kernel BUG in __ext4_journal_stop
ci2-upstream-fs 2023/01/07 16:16 upstream 0a71553536d2 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] kernel BUG in __ext4_journal_stop
ci2-upstream-fs 2022/12/05 08:54 upstream 0ba09b173387 e080de16 .config console log report info [disk image] [vmlinux] [kernel image] kernel BUG in __ext4_journal_stop
ci2-upstream-fs 2022/11/30 10:22 upstream 01f856ae6d0c 579a3740 .config console log report info [disk image] [vmlinux] [kernel image] kernel BUG in __ext4_journal_stop
* Struck through repros no longer work on HEAD.