INFO: task syz-executor.5:6321 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack: 0 pid: 6321 ppid: 3072 flags:0x00000001 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0x258/0x468 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x88/0xcc kernel/locking/rwsem.c:1553 inode_lock include/linux/fs.h:756 [inline] ext4_buffered_write_iter+0x50/0x294 fs/ext4/file.c:264 ext4_file_write_iter+0x544/0xc6c call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x2dc/0x46c fs/read_write.c:578 ksys_write+0xb4/0x160 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __arm64_sys_write+0x24/0x34 fs/read_write.c:640 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 INFO: task syz-executor.5:6326 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack: 0 pid: 6326 ppid: 3072 flags:0x00000001 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0x258/0x468 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x88/0xcc kernel/locking/rwsem.c:1553 inode_lock include/linux/fs.h:756 [inline] ext4_buffered_write_iter+0x50/0x294 fs/ext4/file.c:264 ext4_file_write_iter+0x544/0xc6c call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x2dc/0x46c fs/read_write.c:578 ksys_write+0xb4/0x160 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __arm64_sys_write+0x24/0x34 fs/read_write.c:640 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 INFO: task syz-executor.5:6327 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack: 0 pid: 6327 ppid: 3072 flags:0x00000001 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 io_schedule+0x38/0xbc kernel/sched/core.c:8714 bit_wait_io+0x18/0x60 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0x6c/0x114 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x84/0xac kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:69 [inline] lock_buffer include/linux/buffer_head.h:404 [inline] __sync_dirty_buffer+0xe8/0x324 fs/buffer.c:2807 sync_dirty_buffer+0x24/0x34 fs/buffer.c:2833 __ext4_handle_dirty_metadata+0x118/0x3e0 fs/ext4/ext4_jbd2.c:381 ext4_convert_inline_data_nolock+0x3d8/0x450 fs/ext4/inline.c:1256 ext4_convert_inline_data+0x228/0x30c fs/ext4/inline.c:2067 ext4_fallocate+0xa8/0xc4c fs/ext4/extents.c:4701 vfs_fallocate+0x328/0x38c fs/open.c:323 ioctl_preallocate+0x16c/0x1bc fs/ioctl.c:290 do_vfs_ioctl+0x123c/0x16a4 fs/ioctl.c:849 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x98/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffff80000d433568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/12: #0: ffff80000d433bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/27: #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2711: #0: ffff0000c71f4898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:6/3709: #0: ffff0000c024d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800014973d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff0000c019b0e0 (&type->s_umount_key#39){.+.+}-{3:3}, at: trylock_super+0x28/0xa8 fs/super.c:415 3 locks held by syz-executor.5/6321: #0: ffff00011730bee8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x12c/0x154 fs/file.c:1036 #1: ffff00011ee37460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x180/0x46c fs/read_write.c:574 #2: ffff000118d2d080 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #2: ffff000118d2d080 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x50/0x294 fs/ext4/file.c:264 3 locks held by syz-executor.5/6326: #0: ffff0000c462f6e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x12c/0x154 fs/file.c:1036 #1: ffff00011ee37460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x180/0x46c fs/read_write.c:574 #2: ffff000118d2d080 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #2: ffff000118d2d080 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x50/0x294 fs/ext4/file.c:264 3 locks held by syz-executor.5/6327: #0: ffff00011ee37460 (sb_writers#3){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2922 [inline] #0: ffff00011ee37460 (sb_writers#3){.+.+}-{0:0}, at: vfs_fallocate+0x2e4/0x38c fs/open.c:322 #1: ffff000118d2d080 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff000118d2d080 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0xa0/0xc4c fs/ext4/extents.c:4700 #2: ffff000118d2cd48 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff000118d2cd48 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x1ac/0x30c fs/ext4/inline.c:2065 1 lock held by syz-executor.5/6415: #0: ffff0000c56f6cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812 1 lock held by syz-executor.4/8736: #0: ffff0000c56f6cc8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0xd8/0x198 block/bdev.c:1051 1 lock held by syz-executor.4/8744: #0: ffff0000c56f6cc8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0xd8/0x198 block/bdev.c:1051 =============================================