INFO: task syz.1.28 INFO: task syz.1.28:7892 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.28 state:D stack:0 pid:7892 tgid:7892 ppid:7833 task_flags:0x400040 flags:0x00800001 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083 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:980 [inline] blkdev_fallocate+0x218/0x464 block/fops.c:911 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+0xe8/0x23c 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:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz.2.29:8146 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.29 state:D stack:0 pid:8146 tgid:8146 ppid:8091 task_flags:0x400040 flags:0x00800001 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083 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:980 [inline] blkdev_fallocate+0x218/0x464 block/fops.c:911 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+0xe8/0x23c 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:724 el0t_64_sync_handler+0x84/0x12c 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 khungtaskd/32: #0: ffff80008f79b760 (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 kworker/u8:8/2094: 2 locks held by getty/6334: #0: ffff0000c19cb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bb5b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6557: 2 locks held by syz.0.27/7641: 1 lock held by syz.1.28/7892: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.2.29/8146: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.3.30/8408: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.4.31/8685: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.5.32/8948: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.6.33/9213: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.7.34/9478: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.8.35/9739: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.9.36/9847: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 1 lock held by syz.0.37/9871: #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff0000c1456f38 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x218/0x464 block/fops.c:911 =============================================