INFO: task syz-executor.2:11874 blocked for more than 143 seconds. Not tainted 6.1.23-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:0 pid:11874 ppid:4347 flags:0x00000009 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5241 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6554 schedule+0xc4/0x170 kernel/sched/core.c:6630 io_schedule+0x8c/0x188 kernel/sched/core.c:8774 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xcc/0x1e8 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x194/0x21c 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+0xf8/0x14c include/linux/buffer_head.h:397 __sync_dirty_buffer+0x6c/0x300 fs/buffer.c:2732 sync_dirty_buffer+0x24/0x34 fs/buffer.c:2758 __ext4_handle_dirty_metadata+0x188/0x70c fs/ext4/ext4_jbd2.c:381 ext4_convert_inline_data_nolock+0x66c/0xbc4 fs/ext4/inline.c:1255 ext4_convert_inline_data+0x388/0x508 fs/ext4/inline.c:2066 ext4_page_mkwrite+0x198/0x1120 fs/ext4/inode.c:6165 do_page_mkwrite+0x144/0x37c mm/memory.c:2973 wp_page_shared+0x148/0x550 mm/memory.c:3319 do_wp_page+0xcbc/0xf44 mm/memory.c:3469 handle_pte_fault mm/memory.c:4968 [inline] __handle_mm_fault mm/memory.c:5092 [inline] handle_mm_fault+0x1aa4/0x3d18 mm/memory.c:5213 __do_page_fault arch/arm64/mm/fault.c:512 [inline] do_page_fault+0x634/0xac4 arch/arm64/mm/fault.c:612 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:831 el0_da+0x70/0x184 arch/arm64/kernel/entry-common.c:515 el0t_64_sync_handler+0xcc/0xf0 arch/arm64/kernel/entry-common.c:658 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/12: #0: ffff800015754a30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff800015755230 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/28: #0: ffff800015754860 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:305 1 lock held by udevd/3837: 2 locks held by getty/3988: #0: ffff0000d43c6098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001ca002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.4/4345: #0: ffff800015759e38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #0: ffff800015759e38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e0/0x768 kernel/rcu/tree_exp.h:948 1 lock held by syz-executor.3/4346: #0: ffff800015759e38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffff800015759e38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x394/0x768 kernel/rcu/tree_exp.h:948 2 locks held by kworker/0:4/4401: #0: ffff0000c0021d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2262 #1: ffff80001e077c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2264 2 locks held by kworker/0:6/4403: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2262 #1: ffff80001e097c20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2264 3 locks held by kworker/u4:13/4996: 4 locks held by syz-executor.2/11874: #0: ffff0000d7306748 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000d7306748 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2dc/0xac4 arch/arm64/mm/fault.c:593 #1: ffff000123ce6558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1832 [inline] #1: ffff000123ce6558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1936 [inline] #1: ffff000123ce6558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x168/0x1120 fs/ext4/inode.c:6160 #2: ffff0001266fa3b8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #2: ffff0001266fa3b8 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_page_mkwrite+0x190/0x1120 fs/ext4/inode.c:6163 #3: ffff0001266f9ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #3: ffff0001266f9ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x2d8/0x508 fs/ext4/inline.c:2064 1 lock held by udevd/11965: #0: ffff0000c049d5d8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff0000c049d5d8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x58c mm/readahead.c:226 2 locks held by udevd/11980: 1 lock held by udevd/11981: 1 lock held by udevd/11982: 1 lock held by syz-executor.0/16090: =============================================