linux-kernel - Re: [syzbot] [bcachefs?] WARNING in bch2_journal_flush_seq

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Message-ID: <66ec9d3d.050a0220.2abe4d.0001.GAE@google.com>
Date: Thu, 19 Sep 2024 14:53:01 -0700
From: syzbot <syzbot+d119b445ec739e7f3068@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, pz010001011111@...ton.me, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs?] WARNING in bch2_journal_flush_seq_async

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in bch2_journal_flush_seq_async

bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): done starting filesystem
------------[ cut here ]------------
requested to flush journal seq 36028797018963972, but currently at 15
WARNING: CPU: 1 PID: 7336 at fs/bcachefs/journal.c:672 bch2_journal_flush_seq_async+0x668/0x6c0
Modules linked in:
CPU: 1 UID: 0 PID: 7336 Comm: syz.0.15 Not tainted 6.11.0-rc7-syzkaller-00105-g5f5673607153-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : bch2_journal_flush_seq_async+0x668/0x6c0
lr : bch2_journal_flush_seq_async+0x664/0x6c0 fs/bcachefs/journal.c:670
sp : ffff8000a2ba78e0
x29: ffff8000a2ba7960 x28: dfff800000000000 x27: 1fffe0001c739537
x26: 1ffff00014574f20 x25: 000000000000000f x24: ffff0000e39ca9c8
x23: 0000000000000000 x22: 1fffe0001c739539 x21: ffff0000e39ca9b8
x20: ffff0000e39ca380 x19: ffff8000927b7000 x18: 0000000000000008
x17: 0000000000000000 x16: ffff800083032784 x15: 0000000000000001
x14: 1fffe000366d7a5a x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000003 x10: 0000000000ff0100 x9 : c755fe8fa63d1700
x8 : c755fe8fa63d1700 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000a2ba7038 x4 : ffff80008f65b620 x3 : ffff8000806051a0
x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000000
Call trace:
 bch2_journal_flush_seq_async+0x668/0x6c0
 bch2_journal_flush_seq+0xe8/0x280 fs/bcachefs/journal.c:759
 bch2_flush_inode+0x220/0x390 fs/bcachefs/fs-io.c:185
 bch2_fsync+0x1a0/0x44c fs/bcachefs/fs-io.c:205
 vfs_fsync_range fs/sync.c:188 [inline]
 vfs_fsync fs/sync.c:202 [inline]
 do_fsync fs/sync.c:212 [inline]
 __do_sys_fsync fs/sync.c:220 [inline]
 __se_sys_fsync fs/sync.c:218 [inline]
 __arm64_sys_fsync+0x178/0x1c0 fs/sync.c:218
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
irq event stamp: 75740
hardirqs last  enabled at (75739): [<ffff800080388420>] __up_console_sem kernel/printk/printk.c:341 [inline]
hardirqs last  enabled at (75739): [<ffff800080388420>] __console_unlock kernel/printk/printk.c:2801 [inline]
hardirqs last  enabled at (75739): [<ffff800080388420>] console_unlock+0x18c/0x3d4 kernel/printk/printk.c:3120
hardirqs last disabled at (75740): [<ffff80008b3363f4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470
softirqs last  enabled at (75718): [<ffff8000801f8e88>] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last  enabled at (75718): [<ffff8000801f8e88>] handle_softirqs+0xa3c/0xbfc kernel/softirq.c:582
softirqs last disabled at (75375): [<ffff800080020de8>] __do_softirq+0x14/0x20 kernel/softirq.c:588
---[ end trace 0000000000000000 ]---


Tested on:

commit:         5f567360 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=117b6607980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=dedbcb1ff4387972
dashboard link: https://syzkaller.appspot.com/bug?extid=d119b445ec739e7f3068
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
patch:          https://syzkaller.appspot.com/x/patch.diff?x=10136607980000