Message-ID: <6735aa91.050a0220.2a2fcc.0062.GAE@google.com>
Date: Wed, 13 Nov 2024 23:45:21 -0800
From: syzbot <syzbot+53bb24d476ef8368a7f0@...kaller.appspotmail.com>
To: kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel BUG in __journal_res_get (2)

Hello,

syzbot found the following issue on:

HEAD commit:    0a9b9d17f3a7 Merge tag 'pm-6.12-rc8' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17ac94c0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d2aeec8c0b2e420c
dashboard link: https://syzkaller.appspot.com/bug?extid=53bb24d476ef8368a7f0
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-0a9b9d17.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b80dd0292210/vmlinux-0a9b9d17.xz
kernel image: https://storage.googleapis.com/syzbot-assets/42a07c5c6678/bzImage-0a9b9d17.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+53bb24d476ef8368a7f0@...kaller.appspotmail.com

bcachefs (loop0): shutdown by ioctl type 1
------------[ cut here ]------------
kernel BUG at fs/bcachefs/journal.c:359!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5334 Comm: syz.0.0 Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:journal_entry_open fs/bcachefs/journal.c:359 [inline]
RIP: 0010:__journal_res_get+0x24cb/0x2670 fs/bcachefs/journal.c:544
Code: 89 f9 80 e1 07 38 c1 0f 8c 0d fe ff ff e8 3d 5a c0 fd e9 03 fe ff ff e8 63 4a 89 07 e8 6e 7d 56 fd 90 0f 0b e8 66 7d 56 fd 90 <0f> 0b e8 5e 7d 56 fd 90 0f 0b e8 56 7d 56 fd 90 0f 0b e8 4e 7d 56
RSP: 0018:ffffc9000cfa71c0 EFLAGS: 00010283
RAX: ffffffff843e6caa RBX: 0000000000000002 RCX: 0000000000040000
RDX: ffffc9000d829000 RSI: 0000000000000848 RDI: 0000000000000849
RBP: ffffc9000cfa7490 R08: ffffffff843e4f14 R09: 1ffff1100a049567
R10: dffffc0000000000 R11: ffffed100a049568 R12: 0000000000000023
R13: 00000000003ffffe R14: ffff88805024a500 R15: 1ffff1100a049545
FS:  00007f212f59b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f212f59af98 CR3: 000000003c2e0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_journal_res_get_slowpath+0xe6/0x710 fs/bcachefs/journal.c:606
 bch2_journal_res_get+0x12b/0x1c0 fs/bcachefs/journal.h:382
 bch2_journal_flush_seq_async+0x524/0x830 fs/bcachefs/journal.c:717
 bch2_journal_flush_seq+0xe5/0x2b0 fs/bcachefs/journal.c:772
 bch2_ioc_goingdown fs/bcachefs/fs-ioctl.c:361 [inline]
 bch2_fs_file_ioctl+0x1d17/0x28b0 fs/bcachefs/fs-ioctl.c:581
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f212e77e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f212f59b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f212e936058 RCX: 00007f212e77e719
RDX: 0000000020000080 RSI: 000000008004587d RDI: 0000000000000004
RBP: 00007f212e7f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f212e936058 R15: 00007fff5924ac88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:journal_entry_open fs/bcachefs/journal.c:359 [inline]
RIP: 0010:__journal_res_get+0x24cb/0x2670 fs/bcachefs/journal.c:544
Code: 89 f9 80 e1 07 38 c1 0f 8c 0d fe ff ff e8 3d 5a c0 fd e9 03 fe ff ff e8 63 4a 89 07 e8 6e 7d 56 fd 90 0f 0b e8 66 7d 56 fd 90 <0f> 0b e8 5e 7d 56 fd 90 0f 0b e8 56 7d 56 fd 90 0f 0b e8 4e 7d 56
RSP: 0018:ffffc9000cfa71c0 EFLAGS: 00010283
RAX: ffffffff843e6caa RBX: 0000000000000002 RCX: 0000000000040000
RDX: ffffc9000d829000 RSI: 0000000000000848 RDI: 0000000000000849
RBP: ffffc9000cfa7490 R08: ffffffff843e4f14 R09: 1ffff1100a049567
R10: dffffc0000000000 R11: ffffed100a049568 R12: 0000000000000023
R13: 00000000003ffffe R14: ffff88805024a500 R15: 1ffff1100a049545
FS:  00007f212f59b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f212f59af98 CR3: 000000003c2e0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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