INFO: task syz-executor.3:1952 blocked for more than 143 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:23960 pid: 1952 ppid: 8097 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 __bio_queue_enter+0x3c5/0x6a0 block/blk-core.c:441 bio_queue_enter block/blk.h:91 [inline] blk_mq_get_request block/blk-mq.c:2588 [inline] blk_mq_submit_bio+0x4ae/0x22c0 block/blk-mq.c:2632 __submit_bio block/blk-core.c:849 [inline] __submit_bio_noacct_mq block/blk-core.c:924 [inline] submit_bio_noacct block/blk-core.c:950 [inline] submit_bio_noacct+0x82c/0xa20 block/blk-core.c:939 submit_bio block/blk-core.c:1011 [inline] submit_bio+0x1ea/0x430 block/blk-core.c:969 submit_bh_wbc+0x5e8/0x7e0 fs/buffer.c:3054 __block_write_full_page+0x875/0x1350 fs/buffer.c:1809 block_write_full_page+0x14d/0x190 fs/buffer.c:2980 __writepage+0x60/0x180 mm/page-writeback.c:2320 write_cache_pages+0x6f4/0x10c0 mm/page-writeback.c:2255 generic_writepages mm/page-writeback.c:2346 [inline] generic_writepages+0xe2/0x150 mm/page-writeback.c:2335 do_writepages+0x1ab/0x690 mm/page-writeback.c:2364 filemap_fdatawrite_wbc mm/filemap.c:407 [inline] filemap_fdatawrite_wbc+0x143/0x1b0 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:440 [inline] file_write_and_wait_range+0x163/0x1e0 mm/filemap.c:824 blkdev_fsync+0x4a/0xa0 block/fops.c:465 vfs_fsync_range+0x13a/0x220 fs/sync.c:182 generic_write_sync include/linux/fs.h:2956 [inline] blkdev_write_iter+0x552/0x690 block/fops.c:559 call_write_iter include/linux/fs.h:2162 [inline] do_iter_readv_writev+0x472/0x750 fs/read_write.c:725 do_iter_write+0x188/0x710 fs/read_write.c:851 vfs_iter_write+0x70/0xa0 fs/read_write.c:892 iter_file_splice_write+0x723/0xc70 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xaf2/0x1250 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f00e3a9fae9 RSP: 002b:00007f00e1015188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f00e3bb2f60 RCX: 00007f00e3a9fae9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007f00e3af9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000424002d9f R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd789c0abf R14: 00007f00e1015300 R15: 0000000000022000 INFO: task syz-executor.3:1965 blocked for more than 145 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27464 pid: 1965 ppid: 8097 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178 loop_set_status+0x440/0x930 drivers/block/loop.c:1264 loop_set_status_old+0x148/0x1b0 drivers/block/loop.c:1396 lo_ioctl+0x3e9/0x17c0 drivers/block/loop.c:1566 blkdev_ioctl+0x37a/0x800 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f00e3a9fae9 RSP: 002b:00007f00e0ff4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f00e3bb3020 RCX: 00007f00e3a9fae9 RDX: 0000000020000940 RSI: 0000000000004c02 RDI: 0000000000000004 RBP: 00007f00e3af9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd789c0abf R14: 00007f00e0ff4300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:0/8: #0: ffff888143bca138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888143bca138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888143bca138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888143bca138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888143bca138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888143bca138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc90000cd7db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 #2: ffff888010e620e0 (&type->s_umount_key#48){.+.+}-{3:3}, at: trylock_super+0x1d/0x100 fs/super.c:418 2 locks held by kworker/u4:1/10: #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc90000cf7db0 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 1 lock held by khungtaskd/27: #0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by systemd-udevd/2973: 1 lock held by in:imklog/6229: #0: ffff88801fe800f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 1 lock held by systemd-udevd/9992: #0: ffff88801a686118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819 2 locks held by systemd-udevd/11214: #0: ffff88807eefc460 (sb_writers#3){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3339 [inline] #0: ffff88807eefc460 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x2548/0x2750 fs/namei.c:3556 #1: ffff888079b8ae00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline] #1: ffff888079b8ae00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: open_last_lookups fs/namei.c:3347 [inline] #1: ffff888079b8ae00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: path_openat+0x952/0x2750 fs/namei.c:3556 2 locks held by syz-executor.3/22777: #0: ffff88801a686118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914 #1: ffff88801a681b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106 1 lock held by syz-executor.3/1965: #0: ffff88801a75cb60 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2973 Comm: systemd-udevd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7f1d20d412f1 Code: 0f 6f 57 d4 f3 0f 6f 4e d4 b2 d4 66 0f ef d1 66 0f 38 17 c2 0f 83 87 02 00 00 f3 0f 6f 57 e4 f3 0f 6f 4e e4 b2 e4 66 0f ef d1 <66> 0f 38 17 c2 0f 83 6c 02 00 00 48 8b 47 f4 48 8b 4e f4 48 39 c1 RSP: 002b:00007fff6992ae88 EFLAGS: 00000207 RAX: 0000000000000000 RBX: 0000564fd29580d0 RCX: 00007f1d20d412e1 RDX: 00000000000000e4 RSI: 0000564fd2f58110 RDI: 0000564fd2a2d1e0 RBP: 0000000000000700 R08: 000000000000001c R09: 000000000000001c R10: 000000000000001c R11: 00007f1d20d66060 R12: 0000564fd2a2d1c4 R13: 0000000000000000 R14: 0000564fd2ff3470 R15: 00000000000085d1 FS: 00007f1d21e658c0 GS: 0000000000000000