syzbot


kernel BUG in __bch2_journal_pin_put

Status: upstream: reported C repro on 2024/11/25 03:10
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+73ed43fbe826227bd4e0@syzkaller.appspotmail.com
First crash: 5d20h, last: 3h17m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] kernel BUG in __bch2_journal_pin_put 0 (2) 2024/11/25 12:42

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/bcachefs/journal_reclaim.h:30!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 5151 Comm: kworker/u9:1 Not tainted 6.12.0-syzkaller-09567-g7eef7e306d3c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bcachefs_journal journal_write_work
RIP: 0010:journal_seq_pin fs/bcachefs/journal_reclaim.h:30 [inline]
RIP: 0010:__bch2_journal_pin_put+0x121/0x130 fs/bcachefs/journal_reclaim.c:327
Code: 04 56 fd 31 ff 89 de e8 5d 04 56 fd 89 d8 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 48 01 56 fd 90 0f 0b e8 40 01 56 fd 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90
RSP: 0018:ffffc9001067fa10 EFLAGS: 00010293
RAX: ffffffff843fdb90 RBX: 0000000000000000 RCX: ffff888035a83c00
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: ffffc9001067fb78 R08: ffffffff843fdaf1 R09: ffffffff843d4df8
R10: 0000000000000004 R11: ffff888035a83c00 R12: dffffc0000000000
R13: ffff8880793ca500 R14: ffffffffffffffff R15: ffff8880793ca500
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561ae765a978 CR3: 00000000358b0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_journal_buf_put_final fs/bcachefs/journal.c:217 [inline]
 __bch2_journal_buf_put fs/bcachefs/journal.h:276 [inline]
 __journal_entry_close+0x80a/0xe30 fs/bcachefs/journal.c:301
 journal_write_work+0x129/0x140 fs/bcachefs/journal.c:487
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:journal_seq_pin fs/bcachefs/journal_reclaim.h:30 [inline]
RIP: 0010:__bch2_journal_pin_put+0x121/0x130 fs/bcachefs/journal_reclaim.c:327
Code: 04 56 fd 31 ff 89 de e8 5d 04 56 fd 89 d8 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 48 01 56 fd 90 0f 0b e8 40 01 56 fd 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90
RSP: 0018:ffffc9001067fa10 EFLAGS: 00010293
RAX: ffffffff843fdb90 RBX: 0000000000000000 RCX: ffff888035a83c00
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: ffffc9001067fb78 R08: ffffffff843fdaf1 R09: ffffffff843d4df8
R10: 0000000000000004 R11: ffff888035a83c00 R12: dffffc0000000000
R13: ffff8880793ca500 R14: ffffffffffffffff R15: ffff8880793ca500
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561ae765a978 CR3: 00000000358b0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/26 20:04 upstream 7eef7e306d3c e9a9a9f2 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs kernel BUG in __bch2_journal_pin_put
2024/11/25 12:42 upstream 9f16d5e6f220 36dfdd05 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in __bch2_journal_pin_put
2024/11/25 12:30 upstream 9f16d5e6f220 36dfdd05 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_journal_pin_put
2024/11/21 03:04 upstream 8f7c8b88bda4 4b25d554 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_journal_pin_put
* Struck through repros no longer work on HEAD.