INFO: task syz.5.7528:29358 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.5.7528 state:D stack:0 pid:29358 tgid:29355 ppid:27464 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1370/0x2d80 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7326 io_schedule+0x1c/0xe0 kernel/sched/core.c:8154 folio_wait_bit_common+0x6b8/0xa30 mm/filemap.c:1323 __folio_lock mm/filemap.c:1704 [inline] folio_lock include/linux/pagemap.h:1157 [inline] __filemap_get_folio_mpol+0x1f4/0x1054 mm/filemap.c:1960 __filemap_get_folio include/linux/pagemap.h:761 [inline] ext4_load_tail_bh+0x94/0x704 fs/ext4/inode.c:4040 ext4_block_do_zero_range fs/ext4/inode.c:4111 [inline] ext4_block_zero_range+0xd8/0x7b0 fs/ext4/inode.c:4199 ext4_block_zero_eof+0x22c/0x4b8 fs/ext4/inode.c:4229 ext4_truncate+0x500/0x10d4 fs/ext4/inode.c:4632 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline] ext4_write_end+0x598/0x9e0 fs/ext4/inode.c:1495 generic_perform_write+0x504/0x7a4 mm/filemap.c:4379 ext4_buffered_write_iter+0xd0/0x2ec fs/ext4/file.c:316 ext4_file_write_iter+0x1dc/0x134c fs/ext4/file.c:-1 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 INFO: task syz.5.7528:29366 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.5.7528 state:D stack:0 pid:29366 tgid:29355 ppid:27464 task_flags:0x440040 flags:0x00000011 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1370/0x2d80 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7326 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7383 rwsem_down_read_slowpath+0x530/0x7b0 kernel/locking/rwsem.c:1114 __down_read_common kernel/locking/rwsem.c:1291 [inline] __down_read kernel/locking/rwsem.c:1304 [inline] down_read+0xa0/0x2bc kernel/locking/rwsem.c:1576 filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] page_cache_ra_order+0x334/0xe20 mm/readahead.c:517 page_cache_sync_ra+0x66c/0xaf0 mm/readahead.c:649 page_cache_sync_readahead include/linux/pagemap.h:1395 [inline] collapse_file mm/khugepaged.c:2335 [inline] collapse_scan_file+0x16fc/0x4834 mm/khugepaged.c:2773 collapse_single_pmd+0x3c0/0x3b78 mm/khugepaged.c:2808 madvise_collapse+0x2a4/0x728 mm/khugepaged.c:3234 madvise_vma_behavior+0x408/0x3390 mm/madvise.c:1364 madvise_walk_vmas+0x4c8/0x9bc mm/madvise.c:1713 madvise_do_behavior+0x5f0/0x7c0 mm/madvise.c:1908 do_madvise+0x28c/0x2f0 mm/madvise.c:2006 __do_sys_madvise mm/madvise.c:2015 [inline] __se_sys_madvise mm/madvise.c:2013 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:2013 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 2 locks held by kworker/u8:0/12: 1 lock held by khungtaskd/31: #0: ffff800088cb6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088cb6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffff800088cb6f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 1 lock held by pr/ttyAMA-1/41: 2 locks held by getty/4492: #0: ffff0000d159a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009248b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211 3 locks held by udevd/4753: 2 locks held by kworker/0:4/4834: 3 locks held by udevd/5195: 1 lock held by udevd/5459: 2 locks held by udevd/25825: 4 locks held by syz.5.7528/29358: #0: ffff0000cd7f3b30 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x100/0x144 fs/file.c:1259 #1: ffff0000d54a2450 (sb_writers#3){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2728 [inline] #1: ffff0000d54a2450 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #2: ffff0000dfbf9fa0 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff0000dfbf9fa0 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: ext4_buffered_write_iter+0xa0/0x2ec fs/ext4/file.c:311 #3: ffff0000dfbfa138 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline] #3: ffff0000dfbfa138 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline] #3: ffff0000dfbfa138 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_write_end+0x574/0x9e0 fs/ext4/inode.c:1495 1 lock held by syz.5.7528/29366: #0: ffff0000dfbfa138 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] #0: ffff0000dfbfa138 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x334/0xe20 mm/readahead.c:517 4 locks held by syz.3.8462/32291: #0: ffff0000d18440f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x100/0x144 fs/file.c:1259 #1: ffff0000ed44a450 (sb_writers#3){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2728 [inline] #1: ffff0000ed44a450 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #2: ffff0000efc86aa0 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff0000efc86aa0 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: ext4_buffered_write_iter+0xa0/0x2ec fs/ext4/file.c:311 #3: ffff0000efc86c38 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline] #3: ffff0000efc86c38 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline] #3: ffff0000efc86c38 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_write_end+0x574/0x9e0 fs/ext4/inode.c:1495 1 lock held by syz.3.8462/32302: #0: ffff0000efc86c38 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] #0: ffff0000efc86c38 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x334/0xe20 mm/readahead.c:517 4 locks held by syz.7.12097/10967: #0: ffff0000c98c2630 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x100/0x144 fs/file.c:1259 #1: ffff0000d4d4c450 (sb_writers#3){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2728 [inline] #1: ffff0000d4d4c450 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #2: ffff0000dfba1fa0 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff0000dfba1fa0 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: ext4_buffered_write_iter+0xa0/0x2ec fs/ext4/file.c:311 #3: ffff0000dfba2138 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline] #3: ffff0000dfba2138 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline] #3: ffff0000dfba2138 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_write_end+0x574/0x9e0 fs/ext4/inode.c:1495 1 lock held by syz.7.12097/10978: #0: ffff0000dfba2138 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] #0: ffff0000dfba2138 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x334/0xe20 mm/readahead.c:517 1 lock held by syz-executor/12531: 1 lock held by syz.2.13521/15260: 1 lock held by syz.1.13518/15265: =============================================