INFO: task syz-executor.2:10059 blocked for more than 143 seconds. Not tainted 5.10.236 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26488 pid:10059 ppid: 284 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3799 [inline] __schedule+0x824/0x1ea0 kernel/sched/core.c:4547 schedule+0xcb/0x270 kernel/sched/core.c:4625 blk_queue_enter+0x865/0xc30 block/blk-core.c:465 bio_queue_enter block/blk-core.c:480 [inline] __submit_bio_noacct_mq block/blk-core.c:1011 [inline] submit_bio_noacct+0xc42/0x1010 block/blk-core.c:1053 submit_bio+0xf3/0x4e0 block/blk-core.c:1123 submit_bh_wbc.constprop.0+0x580/0x780 fs/buffer.c:3054 submit_bh fs/buffer.c:3060 [inline] __bread_slow fs/buffer.c:1209 [inline] __bread_gfp+0x166/0x3a0 fs/buffer.c:1402 sb_bread include/linux/buffer_head.h:335 [inline] fat__get_entry+0x4f9/0x8e0 fs/fat/dir.c:100 fat_get_entry fs/fat/dir.c:128 [inline] fat_get_short_entry+0x13f/0x2f0 fs/fat/dir.c:873 fat_subdirs+0xa5/0x180 fs/fat/dir.c:939 fat_read_root fs/fat/inode.c:1412 [inline] fat_fill_super+0x21cd/0x36e0 fs/fat/inode.c:1862 mount_bdev+0x336/0x400 fs/super.c:1442 legacy_get_tree+0x105/0x220 fs/fs_context.c:593 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:2917 [inline] path_mount+0x1429/0x2120 fs/namespace.c:3247 do_mount fs/namespace.c:3260 [inline] __do_sys_mount fs/namespace.c:3468 [inline] __se_sys_mount fs/namespace.c:3445 [inline] __x64_sys_mount+0x282/0x300 fs/namespace.c:3445 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f8a7929a04a RSP: 002b:00007f8a7680dfa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000180 RCX: 00007f8a7929a04a RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 00007f8a7680e000 RBP: 00007f8a7680e040 R08: 00007f8a7680e040 R09: 0000000020000080 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000080 R13: 00000000200000c0 R14: 00007f8a7680e000 R15: 0000000020000240 INFO: task syz-executor.1:10072 blocked for more than 143 seconds. Not tainted 5.10.236 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27560 pid:10072 ppid: 287 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3799 [inline] __schedule+0x824/0x1ea0 kernel/sched/core.c:4547 schedule+0xcb/0x270 kernel/sched/core.c:4625 rwsem_down_read_slowpath+0x514/0xbb0 kernel/locking/rwsem.c:1099 __down_read kernel/locking/rwsem.c:1341 [inline] down_read+0x1f5/0x430 kernel/locking/rwsem.c:1506 __get_super.part.0+0x20d/0x2e0 fs/super.c:773 __get_super include/linux/spinlock.h:354 [inline] get_super+0x2b/0x60 fs/super.c:802 __invalidate_device+0x1c/0x130 fs/block_dev.c:2142 check_disk_size_change+0x122/0x190 fs/block_dev.c:1360 revalidate_disk_size fs/block_dev.c:1388 [inline] revalidate_disk_size+0x80/0xc0 fs/block_dev.c:1375 set_capacity_and_notify+0x8c/0x150 block/genhd.c:57 loop_set_size drivers/block/loop.c:241 [inline] loop_set_status+0x851/0xa10 drivers/block/loop.c:1400 loop_set_status_old+0x1bb/0x250 drivers/block/loop.c:1530 lo_ioctl+0xa19/0x16b0 drivers/block/loop.c:1700 __blkdev_driver_ioctl block/ioctl.c:240 [inline] blkdev_ioctl+0x291/0x710 block/ioctl.c:640 block_ioctl+0xf9/0x140 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f972a142b19 RSP: 002b:00007f97276b8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f972a255f60 RCX: 00007f972a142b19 RDX: 0000000020000140 RSI: 0000000000004c02 RDI: 0000000000000003 RBP: 00007f972a19cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe1c72159f R14: 00007f97276b8300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/22: #0: ffffffff84ff9a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x27b kernel/locking/lockdep.c:6407 1 lock held by in:imklog/177: 2 locks held by syz-executor.7/288: #0: ffff8880084138c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1660 fs/block_dev.c:1503 #1: ffffffff85356888 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_open+0x19/0xd0 drivers/block/loop.c:1886 2 locks held by syz-executor.2/10058: #0: ffff888008411980 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_put+0xfc/0x8a0 fs/block_dev.c:1793 #1: ffffffff85356888 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_release+0x1a/0x1f0 drivers/block/loop.c:1905 1 lock held by syz-executor.2/10059: #0: ffff88800cd820e0 (&type->s_umount_key#54/1){+.+.}-{3:3}, at: alloc_super+0x1e5/0xa90 fs/super.c:229 1 lock held by systemd-udevd/10064: #0: ffffffff85356888 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_simple_ioctl drivers/block/loop.c:1644 [inline] #0: ffffffff85356888 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_ioctl+0x6b6/0x16b0 drivers/block/loop.c:1720 2 locks held by syz-executor.1/10072: #0: ffffffff85356888 (loop_ctl_mutex){+.+.}-{3:3}, at: loop_set_status+0x87/0xa10 drivers/block/loop.c:1351 #1: ffff88800cd820e0 (&type->s_umount_key#55){++++}-{3:3}, at: __get_super.part.0+0x20d/0x2e0 fs/super.c:773 =============================================