INFO: task syz-executor.0:10370 blocked for more than 430 seconds. Not tainted 6.4.0-rc1-syzkaller-00011-g99a670b2069c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:10370 ppid:2899 flags:0x00000006 Call Trace: [] context_switch kernel/sched/core.c:5343 [inline] [] __schedule+0x682/0x16aa kernel/sched/core.c:6669 [] schedule+0x7a/0x100 kernel/sched/core.c:6745 [] io_schedule+0x5a/0x88 kernel/sched/core.c:8979 [] bit_wait_io+0x12/0x7e kernel/sched/wait_bit.c:209 [] __wait_on_bit_lock+0xc2/0x10c kernel/sched/wait_bit.c:90 [] out_of_line_wait_on_bit_lock+0xce/0xf2 kernel/sched/wait_bit.c:117 [] wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] [] __lock_buffer fs/buffer.c:70 [inline] [] lock_buffer include/linux/buffer_head.h:406 [inline] [] __sync_dirty_buffer+0x27c/0x2a4 fs/buffer.c:2807 [] sync_dirty_buffer+0x20/0x2a fs/buffer.c:2833 [] __ext4_handle_dirty_metadata+0x21c/0x4a2 fs/ext4/ext4_jbd2.c:387 [] ext4_convert_inline_data_nolock+0x48c/0x7b0 fs/ext4/inline.c:1252 [] ext4_convert_inline_data+0x298/0x3b4 fs/ext4/inline.c:2063 [] ext4_fallocate+0x138/0x26e0 fs/ext4/extents.c:4708 [] vfs_fallocate+0x342/0x5a4 fs/open.c:324 [] ioctl_preallocate+0x16a/0x1a8 fs/ioctl.c:290 [] file_ioctl fs/ioctl.c:330 [inline] [] do_vfs_ioctl+0xfd8/0x1530 fs/ioctl.c:849 [] __do_sys_ioctl fs/ioctl.c:868 [inline] [] sys_ioctl+0xc4/0x14c fs/ioctl.c:856 [] syscall_handler+0xfa/0x148 arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0xea/0xec arch/riscv/kernel/traps.c:279 [] ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8517d090 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0x712 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffffffff8517cdf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0x712 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/29: #0: ffffffff8517d360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x40/0x1f6 kernel/locking/lockdep.c:6547 1 lock held by syslogd/2680: 2 locks held by getty/2835: #0: ff6000000edb8098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ff2000000027b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb9c/0xd0c drivers/tty/n_tty.c:2176 3 locks held by syz-executor.0/10370: #0: ff600000159ca460 (sb_writers#4){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1494 [inline] #0: ff600000159ca460 (sb_writers#4){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1569 [inline] #0: ff600000159ca460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2522 [inline] #0: ff600000159ca460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x51c/0x5a4 fs/open.c:323 #1: ff600000157ae7b0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ff600000157ae7b0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x132/0x26e0 fs/ext4/extents.c:4707 #2: ff600000157ae478 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ff600000157ae478 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x218/0x3b4 fs/ext4/inline.c:2061 3 locks held by syz-executor.1/10384: #0: ff6000002cb4c460 (sb_writers#4){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1494 [inline] #0: ff6000002cb4c460 (sb_writers#4){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1569 [inline] #0: ff6000002cb4c460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2522 [inline] #0: ff6000002cb4c460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x51c/0x5a4 fs/open.c:323 #1: ff600000157aa1e8 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ff600000157aa1e8 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x132/0x26e0 fs/ext4/extents.c:4707 #2: ff600000157a9eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ff600000157a9eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x218/0x3b4 fs/ext4/inline.c:2061 1 lock held by syz-executor.1/10757: 2 locks held by syz-executor.0/11155: =============================================