__find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 INFO: task syz-executor4:10177 blocked for more than 140 seconds. device loop0 blocksize: 512 Not tainted 4.19.0+ #303 __find_get_block_slow() failed. block=1, b_blocknr=0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000029, b_size=4096 syz-executor4 D device loop0 blocksize: 512 23128 10177 5450 0x00000004 __find_get_block_slow() failed. block=1, b_blocknr=0 Call Trace: b_state=0x00000029, b_size=4096 context_switch kernel/sched/core.c:2826 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3474 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 schedule+0xfe/0x460 kernel/sched/core.c:3518 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __find_get_block_slow() failed. block=1, b_blocknr=0 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 __get_super.part.11+0x207/0x2e0 fs/super.c:698 device loop0 blocksize: 512 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2d/0x50 fs/super.c:727 __find_get_block_slow() failed. block=1, b_blocknr=0 fsync_bdev+0x17/0xc0 fs/block_dev.c:469 b_state=0x00000029, b_size=4096 invalidate_partition+0x35/0x60 block/genhd.c:1570 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 drop_partitions.isra.14+0xe1/0x200 block/partition-generic.c:445 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 rescan_partitions+0x72/0x8e0 block/partition-generic.c:518 device loop0 blocksize: 512 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173 __find_get_block_slow() failed. block=1, b_blocknr=0 blkdev_reread_part+0x26/0x40 block/ioctl.c:193 b_state=0x00000029, b_size=4096 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:646 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1200 b_state=0x00000029, b_size=4096 loop_set_status64+0xaa/0x100 drivers/block/loop.c:1318 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 lo_ioctl+0x90e/0x1d80 drivers/block/loop.c:1434 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9ac/0x2010 block/ioctl.c:601 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 block_ioctl+0xee/0x130 fs/block_dev.c:1883 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 entry_SYSCALL_64_after_hwframe+0x49/0xbe b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 RIP: 0033:0x457569 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 Code: Bad RIP value. b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 RSP: 002b:00007fbf4595ec78 EFLAGS: 00000246 __find_get_block_slow() failed. block=1, b_blocknr=0 ORIG_RAX: 0000000000000010 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 device loop0 blocksize: 512 RDX: 0000000020000380 RSI: 0000000000004c04 RDI: 0000000000000003 __find_get_block_slow() failed. block=1, b_blocknr=0 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 b_state=0x00000029, b_size=4096 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbf4595f6d4 device loop0 blocksize: 512 R13: 00000000004c0481 R14: 00000000004d0630 R15: 00000000ffffffff __find_get_block_slow() failed. block=1, b_blocknr=0 INFO: task blkid:10181 blocked for more than 140 seconds. b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 Not tainted 4.19.0+ #303 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000029, b_size=4096 blkid D device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 24168 10181 30724 0x00000004 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 Call Trace: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 context_switch kernel/sched/core.c:2826 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3474 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 schedule+0xfe/0x460 kernel/sched/core.c:3518 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3576 __find_get_block_slow() failed. block=1, b_blocknr=0 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 do_dentry_open+0x499/0x1250 fs/open.c:771 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 vfs_open+0xa0/0xd0 fs/open.c:880 __find_get_block_slow() failed. block=1, b_blocknr=0 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/0x5150 fs/namei.c:3534 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 do_filp_open+0x255/0x380 fs/namei.c:3564 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 do_sys_open+0x568/0x700 fs/open.c:1063 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 __find_get_block_slow() failed. block=1, b_blocknr=0 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 RIP: 0033:0x7fa3c9171120 b_state=0x00000029, b_size=4096 Code: Bad RIP value. device loop0 blocksize: 512 RSP: 002b:00007fff9804b498 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 __find_get_block_slow() failed. block=1, b_blocknr=0 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa3c9171120 b_state=0x00000029, b_size=4096 RDX: 00007fff9804cf3f RSI: 0000000000000000 RDI: 00007fff9804cf3f RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 device loop0 blocksize: 512 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000813030 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 Showing all locks held in the system: __find_get_block_slow() failed. block=1, b_blocknr=0 1 lock held by khungtaskd/979: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 #0: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 00000000508a6ec2 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 ( b_state=0x00000029, b_size=4096 rcu_read_lock){....} device loop0 blocksize: 512 , at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 __find_get_block_slow() failed. block=1, b_blocknr=0 1 lock held by rsyslogd/5215: b_state=0x00000029, b_size=4096 2 locks held by getty/5305: device loop0 blocksize: 512 #0: __find_get_block_slow() failed. block=1, b_blocknr=0 000000000e29395d b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &tty->ldisc_sem){++++} __find_get_block_slow() failed. block=1, b_blocknr=0 , at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=4096 #1: 000000003e0da2b5 device loop0 blocksize: 512 ( __find_get_block_slow() failed. block=1, b_blocknr=0 &ldata->atomic_read_lock b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 ){+.+.} b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 , at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 b_state=0x00000029, b_size=4096 2 locks held by getty/5306: device loop0 blocksize: 512 #0: 0000000003bf2033 __find_get_block_slow() failed. block=1, b_blocknr=0 ( b_state=0x00000029, b_size=4096 &tty->ldisc_sem device loop0 blocksize: 512 ){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: __find_get_block_slow() failed. block=1, b_blocknr=0 00000000fe8809de b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &ldata->atomic_read_lock __find_get_block_slow() failed. block=1, b_blocknr=0 ){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 b_state=0x00000029, b_size=4096 2 locks held by getty/5307: device loop0 blocksize: 512 #0: __find_get_block_slow() failed. block=1, b_blocknr=0 00000000cfa0f8d8 b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &tty->ldisc_sem __find_get_block_slow() failed. block=1, b_blocknr=0 ){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=4096 #1: device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 00000000bf767be8 b_state=0x00000029, b_size=4096 (&ldata->atomic_read_lock device loop0 blocksize: 512 ){+.+.} __find_get_block_slow() failed. block=1, b_blocknr=0 , at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 b_state=0x00000029, b_size=4096 2 locks held by getty/5308: #0: 0000000061c5ff03 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009b9e21f4 device loop0 blocksize: 512 ( __find_get_block_slow() failed. block=1, b_blocknr=0 &ldata->atomic_read_lock b_state=0x00000029, b_size=4096 ){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5309: device loop0 blocksize: 512 #0: __find_get_block_slow() failed. block=1, b_blocknr=0 00000000217be38d b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &tty->ldisc_sem __find_get_block_slow() failed. block=1, b_blocknr=0 ){++++} b_state=0x00000029, b_size=4096 , at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 device loop0 blocksize: 512 #1: __find_get_block_slow() failed. block=1, b_blocknr=0 0000000028bad8f8 b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 &ldata->atomic_read_lock b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 ){+.+.} __find_get_block_slow() failed. block=1, b_blocknr=0 , at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 b_state=0x00000029, b_size=4096 2 locks held by getty/5310: device loop0 blocksize: 512 #0: __find_get_block_slow() failed. block=1, b_blocknr=0 00000000b18ab30c b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &tty->ldisc_sem __find_get_block_slow() failed. block=1, b_blocknr=0 ){++++} b_state=0x00000029, b_size=4096 , at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 device loop0 blocksize: 512 #1: __find_get_block_slow() failed. block=1, b_blocknr=0 000000004b4a5f81 b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &ldata->atomic_read_lock __find_get_block_slow() failed. block=1, b_blocknr=0 ){+.+.} b_state=0x00000029, b_size=4096 , at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 device loop0 blocksize: 512 2 locks held by getty/5311: __find_get_block_slow() failed. block=1, b_blocknr=0 #0: b_state=0x00000029, b_size=4096 0000000059b2e45b device loop0 blocksize: 512 ( __find_get_block_slow() failed. block=1, b_blocknr=0 &tty->ldisc_sem b_state=0x00000029, b_size=4096 ){++++} device loop0 blocksize: 512 , at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=1, b_blocknr=0 #1: b_state=0x00000029, b_size=4096 00000000c962854c device loop0 blocksize: 512 ( __find_get_block_slow() failed. block=1, b_blocknr=0 &ldata->atomic_read_lock b_state=0x00000029, b_size=4096 ){+.+.} device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 , at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 5 locks held by syz-executor0/10162: __find_get_block_slow() failed. block=1, b_blocknr=0 3 locks held by syz-executor4/10177: b_state=0x00000029, b_size=4096 #0: device loop0 blocksize: 512 00000000ea8f2cd3 __find_get_block_slow() failed. block=1, b_blocknr=0 ( b_state=0x00000029, b_size=4096 &lo->lo_ctl_mutex device loop0 blocksize: 512 /1 __find_get_block_slow() failed. block=1, b_blocknr=0 ){+.+.} b_state=0x00000029, b_size=4096 , at: lo_ioctl+0x8e/0x1d80 drivers/block/loop.c:1404 device loop0 blocksize: 512 #1: __find_get_block_slow() failed. block=1, b_blocknr=0 00000000173cb911 b_state=0x00000029, b_size=4096 ( device loop0 blocksize: 512 &bdev->bd_mutex __find_get_block_slow() failed. block=1, b_blocknr=0 ){+.+.} b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 , at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 b_state=0x00000029, b_size=4096 #2: device loop0 blocksize: 512 000000002e171d7a ( __find_get_block_slow() failed. block=1, b_blocknr=0 &type->s_umount_key b_state=0x00000029, b_size=4096 #79 device loop0 blocksize: 512 ){.+.+} __find_get_block_slow() failed. block=1, b_blocknr=0 , at: __get_super.part.11+0x207/0x2e0 fs/super.c:698 b_state=0x00000029, b_size=4096 1 lock held by blkid/10181: device loop0 blocksize: 512 #0: __find_get_block_slow() failed. block=1, b_blocknr=0 00000000173cb911 b_state=0x00000029, b_size=4096 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 ============================================= b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 NMI backtrace for cpu 0 b_state=0x00000029, b_size=4096 CPU: 0 PID: 979 Comm: khungtaskd Not tainted 4.19.0+ #303 device loop0 blocksize: 512 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 nmi_cpu_backtrace.cold.1+0x5c/0xa1 lib/nmi_backtrace.c:101 __find_get_block_slow() failed. block=1, b_blocknr=0 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 b_state=0x00000029, b_size=4096 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 kthread+0x35a/0x420 kernel/kthread.c:246 device loop0 blocksize: 512 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:350 Sending NMI from CPU 0 to CPUs 1: __find_get_block_slow() failed. block=1, b_blocknr=0 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.442 msecs NMI backtrace for cpu 1 CPU: 1 PID: 10162 Comm: syz-executor0 Not tainted 4.19.0+ #303 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:146 Code: 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 <55> 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 a8 64 RSP: 0018:ffff8801c1756b78 EFLAGS: 00000202 RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff8165708a RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff8801c1756cf0 R08: ffff8801b8518680 R09: 0000000000000008 R10: 0000000000000050 R11: ffff8801b8518680 R12: 0000000000000000 R13: 0000000000000200 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007ff4336af700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000d4e070 CR3: 0000000184915000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1963 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1996 __find_get_block_slow fs/buffer.c:231 [inline] __find_get_block.cold.57+0x3a/0xff fs/buffer.c:1294 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x310 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] read_raw_super_block fs/f2fs/super.c:2830 [inline] f2fs_fill_super+0x443/0x8bc0 fs/f2fs/super.c:3058 mount_bdev+0x30c/0x3e0 fs/super.c:1158 f2fs_mount+0x34/0x40 fs/f2fs/super.c:3457 mount_fs+0xae/0x31d fs/super.c:1261 vfs_kern_mount.part.35+0xdc/0x4f0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2457 [inline] do_mount+0x581/0x31f0 fs/namespace.c:2789 ksys_mount+0x12d/0x140 fs/namespace.c:3005 __do_sys_mount fs/namespace.c:3019 [inline] __se_sys_mount fs/namespace.c:3016 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3016 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459fda Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ff4336aea88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff4336aeb30 RCX: 0000000000459fda RDX: 00007ff4336aead0 RSI: 0000000020000080 RDI: 00007ff4336aeaf0 RBP: 0000000020000080 R08: 00007ff4336aeb30 R09: 00007ff4336aead0 R10: 0000000000800080 R11: 0000000000000206 R12: 0000000000000007 R13: 0000000000800080 R14: 00000000004d7da0 R15: 00000000ffffffff