From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1990F3603DB for ; Fri, 17 Apr 2026 12:59:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776430744; cv=none; b=qJA4KPuccyx0Wlezro7wlff8eFdXdFpWXzECE25j6lS2TV64Kp87pULYReBdO4RfMZT3I9lACSRM3ss5r/gA3lB/ayB3dFG7m/GGtoB1fBkXAdKXE2m7BqCqoRNKniSzQYOsemmyQ3jVU8XKMhTdSBt8WA2Yp2VidUlIageRgTA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776430744; c=relaxed/simple; bh=Bd6VXhzptXDcuQwhGtEDr2kwGMGf+4zvGk7XV3ykNaI=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=jHJokXaDg6Gpv/BevjIWsH0AQNcdP0ZfHdiTMBRtf29euce+vvA/WpsNUv5koItDdiaT/ShSd0xKj8h+dNBmdOrXhRKRYJ/X9VwcHd9d6umiiOBruBKN+4l7+D2rQ5izPjJDnwvBmOqEQuG6Gx5bcVNa5tZ/3DoT0mc0GddnMEo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f70.google.com with SMTP id 006d021491bc7-66b612efb4aso1070080eaf.0 for ; Fri, 17 Apr 2026 05:59:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776430742; x=1777035542; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=QhHseW3nkYnTzAevQUTdwjOIie6EZAdZWvQ1+EgeeN8=; b=Ir31e7NlsN4H2KpUlth2sIbCQZiUoyvUcAVL2oMy7JGWXv5PamSteLSVFQYCwXjvt+ TkEydTcjJBzx6PWGzaIhoXi/RLQRkUeiEGWXPqLSCcxtWcCGkXhEV7gPo4W5hTUuPyKv z8v87UilHwkN7Zo95BgjBelNAS8IXTU/1CJyZZnsAr9JmyiMFR32n3YcQYjQiqydT0ve nVAZVwhQ0bVgnprs5rEK9fOIsBrG5aRhyCbeWKI7T9QTRyT/B632IBetryP/kvhBnVpt EB04XJJeu8F9Nqts9188khmeXtqfo6cW2VdU24WE0jCkHtgUpMfS80ND4dDpUPzI5ahn JrQA== X-Forwarded-Encrypted: i=1; AFNElJ+qD8el8YRmRpz1RJMaGpdsrTzq9wIURi+VCVDmFCGCTbH0Y7LuKEb6ynMSRT8sPecJJGxzCL0EgASkF/I=@vger.kernel.org X-Gm-Message-State: AOJu0YzlH9dCBhvsIzhS5PLcPoqD/VLeYB+QJsSJN0ZCAptN3act9Vma aqVrROroxp2M9KjRQBohpDIHFCmK5FJR3JeHb9n8EPs5AdXhucdiL2G8Db21sWb2YkGbnUaJvL+ 4Xx4t77EZMTRLOEW5sTi+CJ0HenWprHF8KwT0/JNmwWSYd3LFDPKbfot8VEU= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:55c4:10b0:67e:3d3e:db54 with SMTP id 006d021491bc7-6946341dad6mr701585eaf.0.1776430742042; Fri, 17 Apr 2026 05:59:02 -0700 (PDT) Date: Fri, 17 Apr 2026 05:59:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e22e96.050a0220.1de265.0020.GAE@google.com> Subject: Re: [syzbot] [jfs?] KASAN: slab-use-after-free Read in lbmIODone From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in lbmRead INFO: task syz.0.17:6554 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:24224 pid:6554 tgid:6552 ppid:6447 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5387 [inline] __schedule+0x1681/0x54c0 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0x164/0x360 kernel/sched/core.c:7282 lbmRead+0x41d/0x620 fs/jfs/jfs_logmgr.c:1987 lmLogInit+0xc31/0x1a00 fs/jfs/jfs_logmgr.c:1332 open_inline_log fs/jfs/jfs_logmgr.c:1173 [inline] lmLogOpen+0x4e1/0xfa0 fs/jfs/jfs_logmgr.c:1067 jfs_mount_rw+0xee/0x670 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x754/0xd80 fs/jfs/super.c:532 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa8f8bfda8a RSP: 002b:00007fa8f8255e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa8f8255ee0 RCX: 00007fa8f8bfda8a RDX: 0000200000000400 RSI: 00002000000000c0 RDI: 00007fa8f8255ea0 RBP: 0000200000000400 R08: 00007fa8f8255ee0 R09: 000000000001c802 R10: 000000000001c802 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007fa8f8255ea0 R14: 0000000000005f9a R15: 0000200000002740 Showing all locks held in the system: 1 lock held by khungtaskd/38: #0: ffffffff8dfc7f00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8dfc7f00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8dfc7f00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 3 locks held by kworker/u9:0/59: #0: ffff88802a705138 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline] #0: ffff88802a705138 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385 #1: ffffc9000125fc40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline] #1: ffffc9000125fc40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385 #2: ffff888038d10f80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400 net/bluetooth/hci_sync.c:331 9 locks held by kworker/u8:11/2867: 2 locks held by getty/5561: #0: ffff8880389230a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90003cbe2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13a0 drivers/tty/n_tty.c:2211 1 lock held by syz.0.17/6554: #0: ffff8880395e20d0 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345 1 lock held by syz.1.19/6613: #0: ffff88804e5d00d0 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345 1 lock held by syz.2.28/6658: #0: ffff88805bffc0d0 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345 2 locks held by syz-executor/6660: #0: ffff8880587a60d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880587a60d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline] #0: ffff8880587a60d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508 #1: ffffffff8e4545d8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1441 2 locks held by syz-executor/6692: #0: ffff888035d4e0d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff888035d4e0d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline] #0: ffff888035d4e0d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508 #1: ffffffff8e4545d8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1441 2 locks held by syz-executor/6720: #0: ffff88805a2500d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff88805a2500d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline] #0: ffff88805a2500d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508 #1: ffffffff8e4545d8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1441 2 locks held by syz-executor/6754: #0: ffff88803f6220d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff88803f6220d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline] #0: ffff88803f6220d0 (&type->s_umount_key#56){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508 #1: ffffffff8e4545d8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1441 1 lock held by syz.7.41/6809: #0: ffff8880365f80d0 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345 1 lock held by syz.8.42/6838: #0: ffff8880399d60d0 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd3/0x1030 kernel/hung_task.c:561 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 2867 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:reacquire_held_locks+0xf6/0x190 kernel/locking/lockdep.c:5385 Code: e2 01 89 c1 c1 e9 10 83 e1 03 41 89 c0 41 c1 e8 12 41 83 e0 01 41 89 c1 41 c1 e9 13 41 83 e1 01 c1 e8 15 45 8b 16 6a 00 41 52 <50> 41 ff 76 e4 41 ff 76 f4 e8 8c 9f ff ff 48 83 c4 28 83 f8 01 0f RSP: 0018:ffffc9000e707820 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffc9000e707884 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8dfc7f00 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: fffffbfff1f16d97 R12: 0000000000000004 R13: 0000000000000004 R14: ffff8880324968fc R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88812610f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555dbfc4e8 CR3: 000000000ddb6000 CR4: 00000000003526f0 Call Trace: __lock_release kernel/locking/lockdep.c:5574 [inline] lock_release+0x199/0x3c0 kernel/locking/lockdep.c:5889 __local_bh_enable_ip+0x98/0x2b0 kernel/softirq.c:268 local_bh_enable include/linux/bottom_half.h:33 [inline] spin_unlock_bh include/linux/spinlock_rt.h:116 [inline] ieee80211_ibss_work+0x344/0x10d0 net/mac80211/ibss.c:1656 cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:513 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Tested on: commit: 43cfbdda Merge tag 'for-linus-iommufd' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11621906580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4660d1ff2985517b dashboard link: https://syzkaller.appspot.com/bug?extid=ecf51a7ccb6b1394e90c compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=1732d8ce580000