INFO: task syz.1.613:5005 blocked for more than 430 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.613 state:D stack:0 pid:5005 tgid:5004 ppid:3325 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x208/0x4f0 arch/arm64/kernel/process.c:742 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0xd1c/0x3278 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 rwsem_down_write_slowpath+0x4b4/0xd58 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x18c/0x1a4 kernel/locking/rwsem.c:1591 filemap_invalidate_lock include/linux/fs.h:1082 [inline] blk_ioctl_zeroout block/ioctl.c:245 [inline] blkdev_common_ioctl+0x830/0x1f50 block/ioctl.c:661 blkdev_ioctl+0x51c/0x808 block/ioctl.c:786 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x124/0x1a4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x2b0 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 2 locks held by kworker/u8:0/12: 1 lock held by khungtaskd/33: #0: ffff8000875526a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6769 3 locks held by kworker/u8:10/2113: 1 lock held by udevd/3138: 2 locks held by getty/3265: #0: ffff000017b810a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d8eb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e8/0xdd0 drivers/tty/n_tty.c:2211 1 lock held by syz.0.608/4995: 2 locks held by syz.1.613/5005: #0: ffff00000e501338 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #0: ffff00000e501338 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:244 [inline] #0: ffff00000e501338 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_common_ioctl+0x814/0x1f50 block/ioctl.c:661 #1: ffff00000e5014d8 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1082 [inline] #1: ffff00000e5014d8 (mapping.invalidate_lock){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:245 [inline] #1: ffff00000e5014d8 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_common_ioctl+0x830/0x1f50 block/ioctl.c:661 1 lock held by udevd/5686: ============================================= INFO: task syz.1.613:5005 blocked for more than 450 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.613 state:D stack:0 pid:5005 tgid:5004 ppid:3325 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x208/0x4f0 arch/arm64/kernel/process.c:742 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0xd1c/0x3278 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 rwsem_down_write_slowpath+0x4b4/0xd58 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x18c/0x1a4 kernel/locking/rwsem.c:1591 filemap_invalidate_lock include/linux/fs.h:1082 [inline] blk_ioctl_zeroout block/ioctl.c:245 [inline] blkdev_common_ioctl+0x830/0x1f50 block/ioctl.c:661 blkdev_ioctl+0x51c/0x808 block/ioctl.c:786 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x124/0x1a4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x2b0 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by pr/ttyAMA-1/32: 1 lock held by khungtaskd/33: #0: ffff8000875526a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6769 1 lock held by kworker/u8:10/2113: 2 locks held by dhcpcd/3168: #0: ffff000014aca6f0 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: __netlink_dump_start+0xfc/0x800 net/netlink/af_netlink.c:2404 #1: ffff800088ba7608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff800088ba7608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x128/0x1a4 net/core/rtnetlink.c:6826 2 locks held by getty/3265: #0: ffff000017b810a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d8eb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e8/0xdd0 drivers/tty/n_tty.c:2211 4 locks held by kworker/u8:2/3555: 2 locks held by kworker/u8:6/3559: 3 locks held by kworker/u8:1/4662: #0: ffff00001870d148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3232 #1: ffff8000a0d47c90 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3232 #2: ffff800088ba7608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 1 lock held by syz.0.608/4995: 2 locks held by syz.1.613/5005: #0: ffff00000e501338 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #0: ffff00000e501338 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:244 [inline] #0: ffff00000e501338 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_common_ioctl+0x814/0x1f50 block/ioctl.c:661 #1: ffff00000e5014d8 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1082 [inline] #1: ffff00000e5014d8 (mapping.invalidate_lock){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:245 [inline] #1: ffff00000e5014d8 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_common_ioctl+0x830/0x1f50 block/ioctl.c:661 4 locks held by kworker/u8:7/5112: 3 locks held by kworker/u8:8/5618: #0: ffff00000dc31948 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3232 #1: ffff8000a0fa7c90 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3232 #2: ffff800088ba7608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 =============================================