INFO: task syz.8.2228:14419 blocked for more than 143 seconds. Not tainted 6.16.0-rc1-syzkaller-g39dfc971e42d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.8.2228 state:D stack:0 pid:14419 tgid:14417 ppid:11208 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:737 (T) context_switch kernel/sched/core.c:5396 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6878 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6935 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bdev_release+0x154/0x654 block/bdev.c:1128 blkdev_release+0x20/0x34 block/fops.c:684 __fput+0x340/0x75c fs/file_table.c:465 ____fput+0x20/0x58 fs/file_table.c:493 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.8.2228:14422 blocked for more than 143 seconds. Not tainted 6.16.0-rc1-syzkaller-g39dfc971e42d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.8.2228 state:D stack:0 pid:14422 tgid:14417 ppid:11208 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:737 (T) context_switch kernel/sched/core.c:5396 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6878 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6935 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bdev_open+0xcc/0xc20 block/bdev.c:945 blkdev_open+0x300/0x440 block/fops.c:676 do_dentry_open+0xb7c/0x1544 fs/open.c:964 vfs_open+0x44/0x2d4 fs/open.c:1094 do_open fs/namei.c:3887 [inline] path_openat+0x2424/0x2c40 fs/namei.c:4046 do_filp_open+0x18c/0x36c fs/namei.c:4073 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008f819e40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:5/240: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009bc37bc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 5 locks held by kworker/u8:6/250: 1 1 lock held by dhcpcd/6189: #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/6284: #0: ffff0000d296d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b9be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 3 locks held by kworker/1:4/6632: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a0fa7bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/u8:15/9208: 1 lock held by udevd/11800: #0: ffff0000ca333358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:945 2 locks held by kworker/u8:16/13114: 1 lock held by syz.8.2228/14419: #0: ffff0000ca333358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x154/0x654 block/bdev.c:1128 1 lock held by syz.8.2228/14422: #0: ffff0000ca333358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:945 2 locks held by syz-executor/16122: #0: ffff8000916a8ac0 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #1: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4054 2 locks held by syz.5.2659/16258: #0: ffff80008f6320e8 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #1: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4054 1 lock held by syz.5.2659/16261: #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.5.2659/16268: #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4054 1 lock held by syz.9.2660/16272: 1 lock held by syz.9.2660/16278: #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.6.2661/16280: #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x5dc/0x97c net/core/rtnetlink.c:6950 =============================================