Re: [PATCH RFC] fs/buffer: fix use-after-free when call bh_read() helper

[Christian Brauner <brauner@kernel.org>]

On Mon, 11 Aug 2025 22:18:30 +0800, Ye Bin wrote:
> There's issue as follows:
> BUG: KASAN: stack-out-of-bounds in end_buffer_read_sync+0xe3/0x110
> Read of size 8 at addr ffffc9000168f7f8 by task swapper/3/0
> CPU: 3 UID: 0 PID: 0 Comm: swapper/3 Not tainted 6.16.0-862.14.0.6.x86_64
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
> Call Trace:
>  <IRQ>
>  dump_stack_lvl+0x55/0x70
>  print_address_description.constprop.0+0x2c/0x390
>  print_report+0xb4/0x270
>  kasan_report+0xb8/0xf0
>  end_buffer_read_sync+0xe3/0x110
>  end_bio_bh_io_sync+0x56/0x80
>  blk_update_request+0x30a/0x720
>  scsi_end_request+0x51/0x2b0
>  scsi_io_completion+0xe3/0x480
>  ? scsi_device_unbusy+0x11e/0x160
>  blk_complete_reqs+0x7b/0x90
>  handle_softirqs+0xef/0x370
>  irq_exit_rcu+0xa5/0xd0
>  sysvec_apic_timer_interrupt+0x6e/0x90
>  </IRQ>
> 
> [...]

Applied to the vfs.fixes branch of the vfs/vfs.git tree.
Patches in the vfs.fixes branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.fixes

[1/1] fs/buffer: fix use-after-free when call bh_read() helper
      https://git.kernel.org/vfs/vfs/c/fb6d0f63f46d