linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: fix to avoid use-after-free issue in f2fs_filemap

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Message-Id: 
 <171043323144.13516.1787617599417094605.git-patchwork-notify@kernel.org>
Date: Thu, 14 Mar 2024 16:20:31 +0000
From: patchwork-bot+f2fs@...nel.org
To: Chao Yu <chao@...nel.org>
Cc: jaegeuk@...nel.org, hdanton@...a.com, linux-kernel@...r.kernel.org,
 Ed.Tsai@...iatek.com, linux-f2fs-devel@...ts.sourceforge.net,
 syzbot+763afad57075d3f862f2@...kaller.appspotmail.com
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix to avoid use-after-free issue in
 f2fs_filemap_fault

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@...nel.org>:

On Thu, 14 Mar 2024 10:05:28 +0800 you wrote:
> syzbot reports a f2fs bug as below:
> 
> BUG: KASAN: slab-use-after-free in f2fs_filemap_fault+0xd1/0x2c0 fs/f2fs/file.c:49
> Read of size 8 at addr ffff88807bb22680 by task syz-executor184/5058
> 
> CPU: 0 PID: 5058 Comm: syz-executor184 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
> Call Trace:
>  <TASK>
>  __dump_stack lib/dump_stack.c:88 [inline]
>  dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
>  print_address_description mm/kasan/report.c:377 [inline]
>  print_report+0x163/0x540 mm/kasan/report.c:488
>  kasan_report+0x142/0x170 mm/kasan/report.c:601
>  f2fs_filemap_fault+0xd1/0x2c0 fs/f2fs/file.c:49
>  __do_fault+0x131/0x450 mm/memory.c:4376
>  do_shared_fault mm/memory.c:4798 [inline]
>  do_fault mm/memory.c:4872 [inline]
>  do_pte_missing mm/memory.c:3745 [inline]
>  handle_pte_fault mm/memory.c:5144 [inline]
>  __handle_mm_fault+0x23b7/0x72b0 mm/memory.c:5285
>  handle_mm_fault+0x27e/0x770 mm/memory.c:5450
>  do_user_addr_fault arch/x86/mm/fault.c:1364 [inline]
>  handle_page_fault arch/x86/mm/fault.c:1507 [inline]
>  exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1563
>  asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
> 
> [...]

Here is the summary with links:
  - [f2fs-dev] f2fs: fix to avoid use-after-free issue in f2fs_filemap_fault
    https://git.kernel.org/jaegeuk/f2fs/c/eb70d5a6c932

You are awesome, thank you!
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