Message-ID: <0000000000004169f9061ceadd8a@google.com>
Date: Wed, 10 Jul 2024 13:55:20 -0700
From: syzbot <syzbot+85700120f75fc10d4e18@...kaller.appspotmail.com>
To: bfoster@...hat.com, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel BUG in bch2_journal_noflush_seq

Hello,

syzbot found the following issue on:

HEAD commit:    1dd28064d416 Merge tag 'integrity-v6.10-fix' of ssh://ra.k..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17d3d4a5980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1ace69f521989b1f
dashboard link: https://syzkaller.appspot.com/bug?extid=85700120f75fc10d4e18
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=120f9c9e980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=158b8d69980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a42549877f5c/disk-1dd28064.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f2b9c801a744/vmlinux-1dd28064.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c16f617bb3d0/bzImage-1dd28064.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/f0142c51dc8c/mount_0.gz

The issue was bisected to:

commit f7643bc9749f270d487c32dc35b578575bf1adb0
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Wed Apr 17 05:26:02 2024 +0000

    bcachefs: make btree read errors silent during scan

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14e4c7c1980000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16e4c7c1980000
console output: https://syzkaller.appspot.com/x/log.txt?x=12e4c7c1980000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+85700120f75fc10d4e18@...kaller.appspotmail.com
Fixes: f7643bc9749f ("bcachefs: make btree read errors silent during scan")

------------[ cut here ]------------
kernel BUG at fs/bcachefs/journal.c:105!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 5083 Comm: syz-executor282 Not tainted 6.10.0-rc6-syzkaller-00212-g1dd28064d416 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:journal_seq_to_buf fs/bcachefs/journal.c:105 [inline]
RIP: 0010:bch2_journal_noflush_seq+0x320/0x330 fs/bcachefs/journal.c:805
Code: e8 f5 ba 65 fd 48 8b 3c 24 e8 6c a3 57 07 44 89 f0 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 d1 ba 65 fd 90 <0f> 0b e8 c9 ba 65 fd 90 0f 0b 66 0f 1f 44 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90002eeed78 EFLAGS: 00010293
RAX: ffffffff84306bef RBX: 000000000000000e RCX: ffff8880264f0000
RDX: 0000000000000000 RSI: 000000000000000f RDI: 000000000000000e
RBP: ffff888076a4aa80 R08: ffffffff84306a49 R09: 1ffff1100ed4954f
R10: dffffc0000000000 R11: ffffed100ed49550 R12: ffff888076a4a548
R13: dffffc0000000000 R14: 008bf40000000001 R15: 000000000000000f
FS:  0000555572c0e380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555572c1f738 CR3: 000000007ab70000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_trigger_alloc+0xa4a/0x3e10 fs/bcachefs/alloc_background.c:854
 run_one_mem_trigger+0x7e9/0xb90
 bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:713 [inline]
 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:876 [inline]
 __bch2_trans_commit+0x5083/0x88e0 fs/bcachefs/btree_trans_commit.c:1119
 bch2_trans_commit fs/bcachefs/btree_update.h:170 [inline]
 bch2_inode_delete_keys+0xae8/0x1440 fs/bcachefs/inode.c:845
 bch2_inode_rm+0x165/0xd40 fs/bcachefs/inode.c:874
 bch2_evict_inode+0x21c/0x3c0 fs/bcachefs/fs.c:1588
 evict+0x2a8/0x630 fs/inode.c:667
 do_unlinkat+0x512/0x830 fs/namei.c:4420
 __do_sys_unlink fs/namei.c:4461 [inline]
 __se_sys_unlink fs/namei.c:4459 [inline]
 __x64_sys_unlink+0x49/0x60 fs/namei.c:4459
 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: 0033:0x7f8443dc9b17
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007ffc4d875828 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8443dc9b17
RDX: 00007ffc4d875850 RSI: 00007ffc4d8758e0 RDI: 00007ffc4d8758e0
RBP: 00007ffc4d8758e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc4d8769d0
R13: 0000555572c17700 R14: 0000000000000001 R15: 431bde82d7b634db
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:journal_seq_to_buf fs/bcachefs/journal.c:105 [inline]
RIP: 0010:bch2_journal_noflush_seq+0x320/0x330 fs/bcachefs/journal.c:805
Code: e8 f5 ba 65 fd 48 8b 3c 24 e8 6c a3 57 07 44 89 f0 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 d1 ba 65 fd 90 <0f> 0b e8 c9 ba 65 fd 90 0f 0b 66 0f 1f 44 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90002eeed78 EFLAGS: 00010293
RAX: ffffffff84306bef RBX: 000000000000000e RCX: ffff8880264f0000
RDX: 0000000000000000 RSI: 000000000000000f RDI: 000000000000000e
RBP: ffff888076a4aa80 R08: ffffffff84306a49 R09: 1ffff1100ed4954f
R10: dffffc0000000000 R11: ffffed100ed49550 R12: ffff888076a4a548
R13: dffffc0000000000 R14: 008bf40000000001 R15: 000000000000000f
FS:  0000555572c0e380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555572c1f738 CR3: 000000007ab70000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report is generated by a bot. It may contain errors.
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For information about bisection process see: https://goo.gl/tpsmEJ#bisection

If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
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