linux-kernel - Re: [PATCH -next v2] ext4: fix warning in ext4_iomap

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Date:   Fri, 22 Jul 2022 09:58:24 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     linux-ext4@...r.kernel.org, adilger.kernel@...ger.ca,
        Ye Bin <yebin10@...wei.com>
Cc:     "Theodore Ts'o" <tytso@....edu>, jack@...e.cz,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next v2] ext4: fix warning in ext4_iomap_begin as race between bmap and write

On Fri, 17 Jun 2022 09:39:35 +0800, Ye Bin wrote:
> We got issue as follows:
> ------------[ cut here ]------------
> WARNING: CPU: 3 PID: 9310 at fs/ext4/inode.c:3441 ext4_iomap_begin+0x182/0x5d0
> RIP: 0010:ext4_iomap_begin+0x182/0x5d0
> RSP: 0018:ffff88812460fa08 EFLAGS: 00010293
> RAX: ffff88811f168000 RBX: 0000000000000000 RCX: ffffffff97793c12
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
> RBP: ffff88812c669160 R08: ffff88811f168000 R09: ffffed10258cd20f
> R10: ffff88812c669077 R11: ffffed10258cd20e R12: 0000000000000001
> R13: 00000000000000a4 R14: 000000000000000c R15: ffff88812c6691ee
> FS:  00007fd0d6ff3740(0000) GS:ffff8883af180000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fd0d6dda290 CR3: 0000000104a62000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  iomap_apply+0x119/0x570
>  iomap_bmap+0x124/0x150
>  ext4_bmap+0x14f/0x250
>  bmap+0x55/0x80
>  do_vfs_ioctl+0x952/0xbd0
>  __x64_sys_ioctl+0xc6/0x170
>  do_syscall_64+0x33/0x40
>  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> 
> [...]

Applied, thanks!

[1/1] ext4: fix warning in ext4_iomap_begin as race between bmap and write
      commit: b2788f44f61b34468fec945d8ce99b06b7b8b176

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