syzbot


kernel BUG in __block_commit_write (2)

Status: upstream: reported C repro on 2024/01/19 10:04
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+c773c4967e107a688836@syzkaller.appspotmail.com
First crash: 130d, last: 13d
Cause bisection: failed (error log, bisect log)
  
Bug presence (2)
Date Name Commit Repro Result
2024/01/19 lts (merge base) 082280fe94a0 C [report] kernel BUG in __block_commit_write
2024/01/19 upstream (ToT) 9d1694dc91ce C [report] general protection fault in __block_commit_write
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 kernel BUG in __block_commit_write syz error error 1 257d 257d 0/2 auto-obsoleted due to no activity on 2023/12/12 18:06
upstream kernel BUG at fs/buffer.c:LINE! nilfs C done error 567 49d 2230d 26/26 fixed on 2024/04/10 03:59
linux-4.14 kernel BUG at fs/buffer.c:LINE! C error 59 463d 1857d 0/1 upstream: reported C repro on 2019/04/27 19:47
android-5-10 kernel BUG in __block_commit_write 1 258d 258d 0/2 auto-obsoleted due to no activity on 2023/12/12 11:41
linux-4.19 kernel BUG at fs/buffer.c:LINE! (2) udf ext4 C error 31 470d 1284d 0/1 upstream: reported C repro on 2020/11/21 07:48
android-54 kernel BUG at fs/buffer.c:LINE! ext4 C 547 12h18m 1589d 0/2 upstream: reported C repro on 2020/01/21 13:12
android-5-10 kernel BUG in __block_commit_write (2) syz error 2 69d 132d 0/2 premoderation: reported syz repro on 2024/01/17 04:07
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/02/02 10:18 5m retest repro android14-6.1 report log
Fix bisection attempts (3)
Created Duration User Patch Repo Result
2024/05/15 06:40 1h00m bisect fix android14-6.1 job log (0) log
2024/04/12 13:28 1h06m bisect fix android14-6.1 job log (0) log
2024/03/10 16:56 44m bisect fix android14-6.1 job log (0) log

Sample crash report:
loop3: detected capacity change from 0 to 2048
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2097!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2126 Comm: syz-executor320 Not tainted 6.1.57-syzkaller-00030-gcfe8cce4e8a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__block_commit_write+0x27d/0x280 fs/buffer.c:2097
Code: ff 48 8b 5d b8 48 89 df be 08 00 00 00 e8 3b 11 e7 ff f0 80 0b 04 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 03 6c a0 ff <0f> 0b 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 28 4c 89
RSP: 0018:ffffc90004027768 EFLAGS: 00010293
RAX: ffffffff81d4c94d RBX: 0000000000000000 RCX: ffff88811638a880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040277b8 R08: ffffffff81d4c732 R09: fffff9400092b2b1
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000000c
R13: 000000000000000c R14: 4800000000000017 R15: ffffea0004959580
FS:  00007f60a37926c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020014000 CR3: 000000010cbc0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 block_write_end+0x47/0x90 fs/buffer.c:2187
 ext4_write_end+0x218/0x910 fs/ext4/inode.c:1313
 ext4_da_write_end+0x88/0x9a0 fs/ext4/inode.c:3061
 generic_perform_write+0x3e6/0x5c0 mm/filemap.c:3786
 ext4_buffered_write_iter+0x360/0x640 fs/ext4/file.c:285
 ext4_file_write_iter+0x194/0x1cf0
 call_write_iter include/linux/fs.h:2215 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x902/0xeb0 fs/read_write.c:584
 ksys_write+0x199/0x2c0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:646
 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: 0033:0x7f60a37d6539
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 18 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:00007f60a3792218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f60a38606c8 RCX: 00007f60a37d6539
RDX: 000000000000000c RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007f60a38606c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f60a382cc4c
R13: 00007f60a382c4f0 R14: 00007f60a382b300 R15: 0030656c69662f2e
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__block_commit_write+0x27d/0x280 fs/buffer.c:2097
Code: ff 48 8b 5d b8 48 89 df be 08 00 00 00 e8 3b 11 e7 ff f0 80 0b 04 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 03 6c a0 ff <0f> 0b 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 28 4c 89
RSP: 0018:ffffc90004027768 EFLAGS: 00010293
RAX: ffffffff81d4c94d RBX: 0000000000000000 RCX: ffff88811638a880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040277b8 R08: ffffffff81d4c732 R09: fffff9400092b2b1
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000000c
R13: 000000000000000c R14: 4800000000000017 R15: ffffea0004959580
FS:  00007f60a37926c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7b56e7c0 CR3: 000000010cbc0000 CR4: 00000000003506b0
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
2024/01/19 10:03 android14-6.1 cfe8cce4e8a1 21772ce4 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in __block_commit_write
* Struck through repros no longer work on HEAD.