syzbot


divide error in do_journal_end

Status: fixed on 2021/01/27 05:38
Reported-by: syzbot+bb4f0cb3d4364a2ae40a@syzkaller.appspotmail.com
Fix commit: b8590c82b3cc reiserfs: add check for an invalid ih_entry_count
First crash: 1220d, last: 1160d
Fix bisection: fixed by (bisect log) :
commit b8590c82b3ccf9fb4d9f0b0b097be10736869333
Author: Rustam Kovhaev <rkovhaev@gmail.com>
Date: Sun Nov 1 14:09:58 2020 +0000

  reiserfs: add check for an invalid ih_entry_count

  
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream divide error in do_journal_end reiserfs 2 1198d 1225d 0/26 auto-closed as invalid on 2021/03/19 22:00
linux-4.14 divide error in do_journal_end (2) C error 1 550d 1038d 0/1 upstream: reported C repro on 2021/04/28 16:52
upstream divide error in do_journal_end (3) reiserfs C error done 83 55d 435d 0/26 upstream: reported C repro on 2022/12/23 02:34
upstream divide error in do_journal_end (2) reiserfs C inconclusive 2 1025d 1025d 20/26 fixed on 2021/11/10 00:50
linux-5.15 divide error in do_journal_end origin:upstream C 2 24d 237d 0/3 upstream: reported C repro on 2023/07/08 18:42
linux-4.19 divide error in do_journal_end (3) reiserfs C error 1 400d 400d 0/1 upstream: reported C repro on 2023/01/27 02:59
linux-4.19 divide error in do_journal_end (2) C done 4 964d 1075d 1/1 fixed on 2021/08/12 11:53
linux-6.1 divide error in do_journal_end origin:upstream C 1 29d 63d 0/3 upstream: reported C repro on 2023/12/30 01:46
linux-4.14 divide error in do_journal_end C done 1 1148d 1208d 1/1 fixed on 2021/02/21 17:18
Fix bisection attempts (3)
Created Duration User Patch Repo Result
2021/01/26 20:36 3h17m bisect fix linux-4.19.y job log (1)
2020/12/27 20:09 23m bisect fix linux-4.19.y job log (0) log
2020/11/27 19:45 23m bisect fix linux-4.19.y job log (0) log

Sample crash report:
REISERFS (device loop0): journal params: device loop0, size 8192, journal first block 10, max trans len 1024, max batch 900, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using tea hash to sort names
REISERFS (device loop0): using 3.5.x disk format
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8124 Comm: syz-executor978 Not tainted 4.19.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_journal_end+0x247f/0x4840 fs/reiserfs/journal.c:4204
Code: c1 45 84 ca 0f 85 89 17 00 00 83 e2 07 40 38 d6 41 0f 9e c1 40 84 f6 0f 95 c2 41 84 d1 0f 85 70 17 00 00 41 8b 7c 24 14 31 d2 <48> f7 f7 49 8d 7d 18 48 8d 34 0a 48 89 f8 48 c1 e8 03 80 3c 18 00
RSP: 0018:ffff888094d37b40 EFLAGS: 00010246
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005b27048 R08: 0000000000001000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88808e19f000
R13: ffff88809a1f2380 R14: ffff888095122880 R15: 0000000000000001
FS:  00000000018de880(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8da57ff8 CR3: 00000000abda4000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 reiserfs_sync_fs+0xf8/0x120 fs/reiserfs/super.c:78
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem+0x1b5/0x250 fs/sync.c:67
 generic_shutdown_super+0x70/0x370 fs/super.c:442
 kill_block_super+0x97/0xf0 fs/super.c:1185
 deactivate_locked_super+0x94/0x160 fs/super.c:329
 deactivate_super+0x174/0x1a0 fs/super.c:360
 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x448177
Code: 00 00 00 b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d a2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 6d a2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff8da581c8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fff8da59340 RCX: 0000000000448177
RDX: 0000000000400cf7 RSI: 0000000000000002 RDI: 00007fff8da58270
RBP: 000000000000bc3f R08: 0000000000000000 R09: 0000000000000009
R10: 0000000000000005 R11: 0000000000000206 R12: 00007fff8da592e0
R13: 00000000018df880 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 2d5a958ade077014 ]---
RIP: 0010:do_journal_end+0x247f/0x4840 fs/reiserfs/journal.c:4204
Code: c1 45 84 ca 0f 85 89 17 00 00 83 e2 07 40 38 d6 41 0f 9e c1 40 84 f6 0f 95 c2 41 84 d1 0f 85 70 17 00 00 41 8b 7c 24 14 31 d2 <48> f7 f7 49 8d 7d 18 48 8d 34 0a 48 89 f8 48 c1 e8 03 80 3c 18 00
RSP: 0018:ffff888094d37b40 EFLAGS: 00010246
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005b27048 R08: 0000000000001000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88808e19f000
R13: ffff88809a1f2380 R14: ffff888095122880 R15: 0000000000000001
FS:  00000000018de880(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8da57ff8 CR3: 00000000abda4000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/10/28 19:42 linux-4.19.y ad326970d25c f24824d3 .config console log report syz C ci2-linux-4-19
2020/10/28 17:07 linux-4.19.y ad326970d25c f24824d3 .config console log report info ci2-linux-4-19
* Struck through repros no longer work on HEAD.