INFO: task syz. INFO: task syz.9.26:7506 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.26 state:D stack:0 pid:7506 tgid:7506 ppid:7475 task_flags:0x400040 flags:0x00800001 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x6b4/0x10f4 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1591 inode_lock include/linux/fs.h:870 [inline] blkdev_fallocate+0x218/0x464 block/fops.c:904 vfs_fallocate+0x52c/0x668 fs/open.c:342 ksys_fallocate fs/open.c:366 [inline] __do_sys_fallocate fs/open.c:371 [inline] __se_sys_fallocate fs/open.c:369 [inline] __arm64_sys_fallocate+0xbc/0x10c fs/open.c:369 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 3 locks held by kworker/1:0/24: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff800097d47be0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000f42f4240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1cc/0x25b8 drivers/net/netdevsim/fib.c:1490 1 lock held by khungtaskd/32: #0: ffff80008f9d9660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA-1/43: 2 locks held by getty/6317: #0: ffff0000cd7d50a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099e8e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 2 locks held by syz.8.25/7410: 1 lock held by syz.9.26/7506: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.0.27/7618: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.1.28/7890: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.2.29/8120: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.3.30/8394: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.4.31/8647: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.5.32/8932: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.6.33/9135: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.7.34/9450: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 1 lock held by syz.8.35/9605: #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #0: ffff0000c14a5838 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:904 =============================================