INFO: task udevd:6171 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:6171 tgid:6171 ppid:5783 flags:0x00000004 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1274 folio_put_wait_locked mm/filemap.c:1438 [inline] do_read_cache_folio+0xa8/0x548 mm/filemap.c:3685 read_cache_folio+0x68/0x84 mm/filemap.c:3735 read_mapping_folio include/linux/pagemap.h:894 [inline] read_part_sector+0xdc/0x2b8 block/partitions/core.c:726 adfspart_check_ICS+0xd4/0x860 block/partitions/acorn.c:360 check_partition block/partitions/core.c:138 [inline] blk_add_partitions block/partitions/core.c:593 [inline] bdev_disk_changed+0x82c/0x12a4 block/partitions/core.c:697 blkdev_get_whole+0x2a4/0x354 block/bdev.c:661 bdev_open_by_dev+0x2d0/0x7ec block/bdev.c:871 blkdev_open+0x134/0x33c block/fops.c:615 do_dentry_open+0x778/0x12b4 fs/open.c:953 vfs_open+0x7c/0x90 fs/open.c:1087 do_open fs/namei.c:3645 [inline] path_openat+0x1f6c/0x2830 fs/namei.c:3802 do_filp_open+0x1bc/0x3cc fs/namei.c:3829 do_sys_openat2+0x124/0x1b8 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_openat fs/open.c:1435 [inline] __se_sys_openat fs/open.c:1430 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1430 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.1:7649 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:7649 tgid:7644 ppid:6179 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit kernel/sched/wait_bit.c:49 [inline] out_of_line_wait_on_bit+0x208/0x334 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer fs/buffer.c:123 [inline] wait_on_buffer include/linux/buffer_head.h:389 [inline] __block_write_begin_int+0x1444/0x16a0 fs/buffer.c:2140 iomap_write_begin+0x898/0x1568 fs/iomap/buffered-io.c:777 iomap_write_iter fs/iomap/buffered-io.c:914 [inline] iomap_file_buffered_write+0x460/0xb30 fs/iomap/buffered-io.c:977 blkdev_buffered_write block/fops.c:661 [inline] blkdev_write_iter+0x344/0x4f0 block/fops.c:711 call_write_iter include/linux/fs.h:2087 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x968/0xc3c fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.3:7653 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:7653 tgid:7652 ppid:6781 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1274 __folio_lock+0x2c/0x3c mm/filemap.c:1612 folio_lock include/linux/pagemap.h:1048 [inline] migrate_folio_unmap mm/migrate.c:1165 [inline] migrate_pages_batch+0xb58/0x2538 mm/migrate.c:1675 migrate_pages_sync mm/migrate.c:1868 [inline] migrate_pages+0x1bf8/0x3114 mm/migrate.c:1950 compact_zone+0x2778/0x4120 mm/compaction.c:2554 compact_node+0x234/0x3c0 mm/compaction.c:2851 compact_nodes mm/compaction.c:2864 [inline] sysctl_compaction_handler+0x110/0x1d4 mm/compaction.c:2910 proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:595 proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:621 call_write_iter include/linux/fs.h:2087 [inline] iter_file_splice_write+0x894/0xfc0 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0xec/0x1d8 fs/splice.c:1164 splice_direct_to_actor+0x438/0xa0c fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x1e4/0x304 fs/splice.c:1233 do_sendfile+0x460/0xb3c fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1356 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __arm64_sys_sendfile64+0x23c/0x3b4 fs/read_write.c:1348 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008ee74ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297 2 locks held by udevd/5783: 2 locks held by getty/5925: #0: ffff0000d76510a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800094f722f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 1 lock held by udevd/6171: #0: ffff0000ca2db4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.3/7653: #0: ffff0000d8784420 (sb_writers#4){.+.+}-{0:0}, at: direct_splice_actor+0x54/0x1d8 fs/splice.c:1163 1 lock held by syz-executor.1/9092: #0: ffff0000ca2db4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 3 locks held by syz-executor.2/10595: #0: ffff0000d8498420 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:409 #1: ffff0000c155b600 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline] #1: ffff0000c155b600 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_rmdir+0x1d8/0x720 fs/namei.c:4256 #2: ffff0000f4b68e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #2: ffff0000f4b68e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd8/0x508 fs/namei.c:4327 2 locks held by syz-executor.3/11555: 3 locks held by syz-executor.1/11574: #0: ffff0000c6cec870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline] #0: ffff0000c6cec870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig fs/fsopen.c:349 [inline] #0: ffff0000c6cec870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __arm64_sys_fsconfig+0x74c/0xc40 fs/fsopen.c:349 #1: ffff0000d617a0e0 (&type->s_umount_key#90/1){+.+.}-{3:3}, at: alloc_super+0x1b0/0x83c fs/super.c:343 #2: ffff0000d6a18090 (&client->mount_mutex){+.+.}-{3:3}, at: ceph_real_mount fs/ceph/super.c:1149 [inline] #2: ffff0000d6a18090 (&client->mount_mutex){+.+.}-{3:3}, at: ceph_get_tree+0x730/0x146c fs/ceph/super.c:1343 1 lock held by syz-executor.1/11578: #0: ffff0000c6cec870 (&fc->uapi_mutex){+.+.}-{3:3}, at: fscontext_read+0x80/0x404 fs/fsopen.c:35 2 locks held by syz-executor.4/11573: #0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x704/0xdbc net/core/rtnetlink.c:6614 #1: ffff80008ee7a3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #1: ffff80008ee7a3f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:995 1 lock held by syz-executor.4/11577: #0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x704/0xdbc net/core/rtnetlink.c:6614 1 lock held by syz-executor.4/11581: #0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff80009194f2e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x704/0xdbc net/core/rtnetlink.c:6614 =============================================