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Mon, 09 Oct 2023 07:19:39 -0700 (PDT) Date: Mon, 09 Oct 2023 07:19:39 -0700 In-Reply-To: <20231009-leihgabe-abseilen-26e86d03f787@brauner> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dbce480607494722@google.com> From: syzbot To: axboe@kernel.dk, brauner@kernel.org, chao@kernel.org, daniel.vetter@ffwll.ch, hdanton@sina.com, jack@suse.cz, jaegeuk@kernel.org, jinpu.wang@ionos.com, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mairacanal@riseup.net, mcanal@igalia.com, reiserfs-devel@vger.kernel.org, syzkaller-bugs@googlegroups.com, terrelln@fb.com, willy@infradead.org, yukuai3@huawei.com X-Headers-End: 1qpr6q-0004aP-Di Subject: Re: [f2fs-dev] [syzbot] [reiserfs?] possible deadlock in super_lock 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: INFO: task hung in blkdev_put INFO: task syz-executor.1:6676 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:6676 ppid:6383 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_put+0xec/0x740 block/bdev.c:884 blkdev_release+0x84/0x9c block/fops.c:604 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.2:6678 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:0 pid:6678 ppid:6377 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_put+0xec/0x740 block/bdev.c:884 blkdev_release+0x84/0x9c block/fops.c:604 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.0:6682 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:6682 ppid:6389 flags:0x0000000d Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_finish_claiming+0x218/0x3dc block/bdev.c:566 blkdev_get_by_dev+0x3f4/0x55c block/bdev.c:799 journal_init_dev fs/reiserfs/journal.c:2616 [inline] journal_init+0xb08/0x1e68 fs/reiserfs/journal.c:2783 reiserfs_fill_super+0xd58/0x2058 fs/reiserfs/super.c:2029 mount_bdev+0x1e8/0x2b4 fs/super.c:1629 get_super_block+0x44/0x58 fs/reiserfs/super.c:2605 legacy_get_tree+0xd4/0x16c fs/fs_context.c:638 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.3:6690 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:6690 ppid:6373 flags:0x0000000d Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 super_lock+0x23c/0x328 fs/super.c:134 super_lock_shared fs/super.c:146 [inline] super_lock_shared_active fs/super.c:1431 [inline] fs_bdev_sync+0xa4/0x168 fs/super.c:1466 blkdev_flushbuf block/ioctl.c:372 [inline] blkdev_common_ioctl+0x848/0x2884 block/ioctl.c:502 blkdev_ioctl+0x35c/0xae4 block/ioctl.c:624 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.3:6695 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:6695 ppid:6373 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 loop_configure+0x15c/0xfd4 drivers/block/loop.c:1018 lo_ioctl+0xc70/0x1d04 blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.5:6696 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:0 pid:6696 ppid:6381 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 blkdev_open+0x128/0x2b0 block/fops.c:589 do_dentry_open+0x6fc/0x118c fs/open.c:929 vfs_open+0x7c/0x90 fs/open.c:1063 do_open fs/namei.c:3639 [inline] path_openat+0x1f2c/0x27f8 fs/namei.c:3796 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.5:6703 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:0 pid:6703 ppid:6381 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 loop_configure+0x15c/0xfd4 drivers/block/loop.c:1018 lo_ioctl+0xc70/0x1d04 blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.4:6698 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:6698 ppid:6384 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 blkdev_open+0x128/0x2b0 block/fops.c:589 do_dentry_open+0x6fc/0x118c fs/open.c:929 vfs_open+0x7c/0x90 fs/open.c:1063 do_open fs/namei.c:3639 [inline] path_openat+0x1f2c/0x27f8 fs/namei.c:3796 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.4:6704 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:6704 ppid:6384 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 loop_configure+0x15c/0xfd4 drivers/block/loop.c:1018 lo_ioctl+0xc70/0x1d04 blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffff80008e3739c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:302 2 locks held by kworker/u4:6/235: 2 locks held by getty/5770: #0: ffff0000d6cf20a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000959f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2206 1 lock held by syz-executor.1/6676: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xec/0x740 block/bdev.c:884 1 lock held by syz-executor.2/6678: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xec/0x740 block/bdev.c:884 3 locks held by syz-executor.0/6682: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 #1: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_finish_claiming+0x84/0x3dc block/bdev.c:557 #2: ffff0000c1543a88 (&bdev->bd_holder_lock){+.+.}-{3:3}, at: bd_finish_claiming+0x218/0x3dc block/bdev.c:566 1 lock held by syz-executor.3/6690: #0: ffff0000c1543a88 (&bdev->bd_holder_lock){+.+.}-{3:3}, at: blkdev_flushbuf block/ioctl.c:370 [inline] #0: ffff0000c1543a88 (&bdev->bd_holder_lock){+.+.}-{3:3}, at: blkdev_common_ioctl+0x7fc/0x2884 block/ioctl.c:502 1 lock held by syz-executor.3/6695: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.5/6696: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.5/6703: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.4/6698: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.4/6704: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.0/6872: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.1/6939: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.1/6940: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.2/6956: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.2/6957: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.5/6959: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.5/6960: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.3/6976: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.3/6977: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.4/6979: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.4/6980: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.1/6999: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.1/7000: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.2/7054: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.2/7055: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.5/7067: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.5/7068: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.3/7075: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.3/7078: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.4/7083: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.4/7084: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 ============================================= Tested on: commit: b6ab1318 reiserfs: fix journal device opening git tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git b4/vfs-fixes-reiserfs console output: https://syzkaller.appspot.com/x/log.txt?x=125bdcde680000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b8c825e0d5f3f72 dashboard link: https://syzkaller.appspot.com/bug?extid=062317ea1d0a6d5e29e7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Note: no patches were applied. _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4C1CE95A95 for ; Mon, 9 Oct 2023 14:19:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377644AbjJIOTs (ORCPT ); Mon, 9 Oct 2023 10:19:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377096AbjJIOTq (ORCPT ); Mon, 9 Oct 2023 10:19:46 -0400 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FFAACA for ; Mon, 9 Oct 2023 07:19:40 -0700 (PDT) Received: by mail-oi1-f197.google.com with SMTP id 5614622812f47-3ae12e140f7so6954741b6e.0 for ; Mon, 09 Oct 2023 07:19:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696861180; x=1697465980; 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=0TGWQAlp8UuYQhA52ZWaujZvCAShLjeIRZ1glRL7WKI=; b=caKy1gm9UNjtqxIs+zOLhXYuuEiDPX/Q6MUdoSOOUBVd85P/GHZBKKneXr1U3dnZzn zk+1o1Ohu6SGC4IH6q3ZVbvUwyOfHfkonRHucWlfiyJ/ZcCYoSVyOguTeDtPokxZVpyl TBVD6tRKHjcMbt8a6TSvg70MYMlY2wAoOinkaRmndmk1sTpQlm49pOL7wcRDqdJ8a5+C tkFiYUKPrVXXiHtzLLWb/SCeQG2OTqjLpoTY43tNukPOHjo/QSZdco3fjILUpHv9FNAP gBfZk516JQWmzSqhyeCoulEBQt9JrSui09nkpjAcSlUPLqofHD9SJo6527cvC6FaSzos vb5Q== X-Gm-Message-State: AOJu0YxfzaASVaQMbU45IgQ+k1NS94GyDECzPWTXwPKgX1M8oaMP5f5c vkXAa7LJiYjqAH5jNqtwcrY9dKtljzK6XaVysjXMH/c/Jlee X-Google-Smtp-Source: AGHT+IF8k7g0eSiSkI0Ync143FSHXVQo54adV+KV5FBCMFaXl+hqfgqHiK68ktgDtgtIhiy6neQ2zCz/2mSRkRXFkrZ/R/d9uXLc MIME-Version: 1.0 X-Received: by 2002:a05:6808:2190:b0:3a8:45f0:b83a with SMTP id be16-20020a056808219000b003a845f0b83amr6406561oib.5.1696861179851; Mon, 09 Oct 2023 07:19:39 -0700 (PDT) Date: Mon, 09 Oct 2023 07:19:39 -0700 In-Reply-To: <20231009-leihgabe-abseilen-26e86d03f787@brauner> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dbce480607494722@google.com> Subject: Re: [syzbot] [reiserfs?] possible deadlock in super_lock From: syzbot To: axboe@kernel.dk, brauner@kernel.org, chao@kernel.org, daniel.vetter@ffwll.ch, hdanton@sina.com, jack@suse.cz, jaegeuk@kernel.org, jinpu.wang@ionos.com, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mairacanal@riseup.net, mcanal@igalia.com, reiserfs-devel@vger.kernel.org, syzkaller-bugs@googlegroups.com, terrelln@fb.com, willy@infradead.org, yukuai3@huawei.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: reiserfs-devel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in blkdev_put INFO: task syz-executor.1:6676 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:6676 ppid:6383 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_put+0xec/0x740 block/bdev.c:884 blkdev_release+0x84/0x9c block/fops.c:604 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.2:6678 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:0 pid:6678 ppid:6377 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_put+0xec/0x740 block/bdev.c:884 blkdev_release+0x84/0x9c block/fops.c:604 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.0:6682 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:6682 ppid:6389 flags:0x0000000d Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_finish_claiming+0x218/0x3dc block/bdev.c:566 blkdev_get_by_dev+0x3f4/0x55c block/bdev.c:799 journal_init_dev fs/reiserfs/journal.c:2616 [inline] journal_init+0xb08/0x1e68 fs/reiserfs/journal.c:2783 reiserfs_fill_super+0xd58/0x2058 fs/reiserfs/super.c:2029 mount_bdev+0x1e8/0x2b4 fs/super.c:1629 get_super_block+0x44/0x58 fs/reiserfs/super.c:2605 legacy_get_tree+0xd4/0x16c fs/fs_context.c:638 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.3:6690 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:6690 ppid:6373 flags:0x0000000d Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 super_lock+0x23c/0x328 fs/super.c:134 super_lock_shared fs/super.c:146 [inline] super_lock_shared_active fs/super.c:1431 [inline] fs_bdev_sync+0xa4/0x168 fs/super.c:1466 blkdev_flushbuf block/ioctl.c:372 [inline] blkdev_common_ioctl+0x848/0x2884 block/ioctl.c:502 blkdev_ioctl+0x35c/0xae4 block/ioctl.c:624 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.3:6695 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:6695 ppid:6373 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 loop_configure+0x15c/0xfd4 drivers/block/loop.c:1018 lo_ioctl+0xc70/0x1d04 blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.5:6696 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:0 pid:6696 ppid:6381 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 blkdev_open+0x128/0x2b0 block/fops.c:589 do_dentry_open+0x6fc/0x118c fs/open.c:929 vfs_open+0x7c/0x90 fs/open.c:1063 do_open fs/namei.c:3639 [inline] path_openat+0x1f2c/0x27f8 fs/namei.c:3796 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.5:6703 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:0 pid:6703 ppid:6381 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 loop_configure+0x15c/0xfd4 drivers/block/loop.c:1018 lo_ioctl+0xc70/0x1d04 blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.4:6698 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:6698 ppid:6384 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 blkdev_open+0x128/0x2b0 block/fops.c:589 do_dentry_open+0x6fc/0x118c fs/open.c:929 vfs_open+0x7c/0x90 fs/open.c:1063 do_open fs/namei.c:3639 [inline] path_openat+0x1f2c/0x27f8 fs/namei.c:3796 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 INFO: task syz-executor.4:6704 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-gb6ab131813c2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:6704 ppid:6384 flags:0x00000005 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 loop_configure+0x15c/0xfd4 drivers/block/loop.c:1018 lo_ioctl+0xc70/0x1d04 blkdev_ioctl+0x3e4/0xae4 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffff80008e3739c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:302 2 locks held by kworker/u4:6/235: 2 locks held by getty/5770: #0: ffff0000d6cf20a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000959f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2206 1 lock held by syz-executor.1/6676: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xec/0x740 block/bdev.c:884 1 lock held by syz-executor.2/6678: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xec/0x740 block/bdev.c:884 3 locks held by syz-executor.0/6682: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 #1: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_finish_claiming+0x84/0x3dc block/bdev.c:557 #2: ffff0000c1543a88 (&bdev->bd_holder_lock){+.+.}-{3:3}, at: bd_finish_claiming+0x218/0x3dc block/bdev.c:566 1 lock held by syz-executor.3/6690: #0: ffff0000c1543a88 (&bdev->bd_holder_lock){+.+.}-{3:3}, at: blkdev_flushbuf block/ioctl.c:370 [inline] #0: ffff0000c1543a88 (&bdev->bd_holder_lock){+.+.}-{3:3}, at: blkdev_common_ioctl+0x7fc/0x2884 block/ioctl.c:502 1 lock held by syz-executor.3/6695: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.5/6696: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.5/6703: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.4/6698: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.4/6704: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.0/6872: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.1/6939: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.1/6940: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.2/6956: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.2/6957: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.5/6959: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.5/6960: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.3/6976: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.3/6977: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.4/6979: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.4/6980: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.1/6999: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.1/7000: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.2/7054: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.2/7055: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.5/7067: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.5/7068: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.3/7075: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.3/7078: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 1 lock held by syz-executor.4/7083: #0: ffff0000c9ce34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x114/0x55c block/bdev.c:786 1 lock held by syz-executor.4/7084: #0: ffff80008e1748a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 ============================================= Tested on: commit: b6ab1318 reiserfs: fix journal device opening git tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git b4/vfs-fixes-reiserfs console output: https://syzkaller.appspot.com/x/log.txt?x=125bdcde680000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b8c825e0d5f3f72 dashboard link: https://syzkaller.appspot.com/bug?extid=062317ea1d0a6d5e29e7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Note: no patches were applied.