Re: [f2fs-dev] [PATCH] f2fs: fix to avoid use-after-free issue in f2fs_filemap_fault

patchwork-bot+f2fs
2024-03-14T16:20:31Z

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.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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