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Mon, 04 May 2026 13:51:01 -0700 (PDT) Date: Mon, 04 May 2026 13:51:01 -0700 In-Reply-To: <2956b248-c79f-4eae-8bfc-81178b5899af@dev.snart.me> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f906b5.050a0220.892e9.00d7.GAE@google.com> From: syzbot To: dxdt@dev.snart.me, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com X-Headers-End: 1wK0G0-0000W3-L5 Subject: Re: [f2fs-dev] [syzbot] [mm?] [exfat?] [f2fs?] memory leak in __kfree_rcu_sheaf X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel panic: !!! sbi at ADDR used after freeing !!! F2FS-fs (loop1): f2fs_record_error_work() Kernel panic - not syncing: !!! sbi at ffff888129322000 used after freeing !!! CPU: 1 UID: 0 PID: 6598 Comm: kworker/1:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events f2fs_record_error_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x97/0xe0 lib/dump_stack.c:120 vpanic+0x383/0x6d0 kernel/panic.c:650 panic+0x6e/0x70 kernel/panic.c:787 f2fs_record_error_work.cold+0x14/0x14 fs/f2fs/super.c:4747 process_one_work+0x277/0x5b0 kernel/workqueue.c:3302 process_scheduled_works kernel/workqueue.c:3385 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3466 kthread+0x14e/0x1a0 kernel/kthread.c:436 ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Kernel Offset: disabled Tested on: commit: 6d35786d Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17a63a36580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9645c21cfd1d3e8f dashboard link: https://syzkaller.appspot.com/bug?extid=cae7809e9dc1459e4e63 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=172b8ad2580000 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel