linux-ext4 - Re: [PATCH -next v4] ext4: fix bug_on in ext4

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Date:   Wed, 18 May 2022 22:15:01 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Ye Bin <yebin10@...wei.com>, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org
Cc:     "Theodore Ts'o" <tytso@....edu>, jack@...e.cz,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next v4] ext4: fix bug_on in ext4_writepages

On Mon, 16 May 2022 20:26:34 +0800, Ye Bin wrote:
> we got issue as follows:
> EXT4-fs error (device loop0): ext4_mb_generate_buddy:1141: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free cls
> ------------[ cut here ]------------
> kernel BUG at fs/ext4/inode.c:2708!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
> CPU: 2 PID: 2147 Comm: rep Not tainted 5.18.0-rc2-next-20220413+ #155
> RIP: 0010:ext4_writepages+0x1977/0x1c10
> RSP: 0018:ffff88811d3e7880 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88811c098000
> RDX: 0000000000000000 RSI: ffff88811c098000 RDI: 0000000000000002
> RBP: ffff888128140f50 R08: ffffffffb1ff6387 R09: 0000000000000000
> R10: 0000000000000007 R11: ffffed10250281ea R12: 0000000000000001
> R13: 00000000000000a4 R14: ffff88811d3e7bb8 R15: ffff888128141028
> FS:  00007f443aed9740(0000) GS:ffff8883aef00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020007200 CR3: 000000011c2a4000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <TASK>
>  do_writepages+0x130/0x3a0
>  filemap_fdatawrite_wbc+0x83/0xa0
>  filemap_flush+0xab/0xe0
>  ext4_alloc_da_blocks+0x51/0x120
>  __ext4_ioctl+0x1534/0x3210
>  __x64_sys_ioctl+0x12c/0x170
>  do_syscall_64+0x3b/0x90
> 
> [...]

Applied, thanks!

[1/1] ext4: fix bug_on in ext4_writepages
      commit: eed67ff2ad862d1edca9cbba1e4a56c634cb0d46

Best regards,
-- 
Theodore Ts'o <tytso@....edu>