b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 INFO: task syz-executor0:11165 blocked for more than 140 seconds. __find_get_block_slow() failed. block=2, b_blocknr=8 Not tainted 5.0.0-rc1+ #14 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. device loop0 blocksize: 2048 syz-executor0 D24088 11165 8176 0x00000004 __find_get_block_slow() failed. block=2, b_blocknr=8 Call Trace: b_state=0x00000029, b_size=512 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 schedule+0xfe/0x350 kernel/sched/core.c:3516 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 b_state=0x00000029, b_size=512 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 inode_lock include/linux/fs.h:757 [inline] do_last fs/namei.c:3321 [inline] path_openat+0x1967/0x5650 fs/namei.c:3534 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 do_filp_open+0x26f/0x370 fs/namei.c:3564 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 do_sys_open+0x59a/0x7c0 fs/open.c:1063 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 __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 b_state=0x00000029, b_size=512 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 device loop0 blocksize: 2048 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: Bad RIP value. __find_get_block_slow() failed. block=2, b_blocknr=8 RSP: 002b:00007fcf5d7abc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 __find_get_block_slow() failed. block=2, b_blocknr=8 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000040 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 b_state=0x00000029, b_size=512 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcf5d7ac6d4 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 R13: 00000000004f471f R14: 00000000004d6d30 R15: 00000000ffffffff b_state=0x00000029, b_size=512 Showing all locks held in the system: device loop0 blocksize: 2048 1 lock held by khungtaskd/1040: __find_get_block_slow() failed. block=2, b_blocknr=8 #0: 0000000018500831 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 1 lock held by rsyslogd/8052: b_state=0x00000029, b_size=512 #0: 000000003c170018 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 2 locks held by getty/8143: b_state=0x00000029, b_size=512 #0: 00000000033b0f9e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 2048 #1: 00000000e4dc6992 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=2, b_blocknr=8 2 locks held by getty/8144: b_state=0x00000029, b_size=512 #0: 000000004211f834 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 #1: 0000000073ef9feb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/8145: device loop0 blocksize: 2048 #0: 0000000026a18f9e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=2, b_blocknr=8 #1: 0000000001fa7455 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/8146: device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 #0: 00000000848a5a2c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000029, b_size=512 #1: 000000004b2b6a08 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 2 locks held by getty/8147: b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 #0: 00000000df0e50fe (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 #1: 00000000237f20ed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/8148: device loop0 blocksize: 2048 #0: 00000000dbc0da1d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=2, b_blocknr=8 #1: 00000000751be42c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/8149: device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 #0: 000000005090f7eb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000029, b_size=512 #1: 000000003d94cefa (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 2 locks held by syz-executor0/11165: b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 #0: 000000000a93189d (sb_writers#17){.+.+}, at: sb_start_write include/linux/fs.h:1602 [inline] #0: 000000000a93189d (sb_writers#17){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:357 b_state=0x00000029, b_size=512 #1: 00000000b6b60b36 (&sb->s_type->i_mutex_key#23){++++}, at: inode_lock include/linux/fs.h:757 [inline] #1: 00000000b6b60b36 (&sb->s_type->i_mutex_key#23){++++}, at: do_last fs/namei.c:3321 [inline] #1: 00000000b6b60b36 (&sb->s_type->i_mutex_key#23){++++}, at: path_openat+0x1967/0x5650 fs/namei.c:3534 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 7 locks held by syz-executor0/11172: b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 ============================================= __find_get_block_slow() failed. block=2, b_blocknr=8 NMI backtrace for cpu 1 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc1+ #14 b_state=0x00000029, b_size=512 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 device loop0 blocksize: 2048 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 __find_get_block_slow() failed. block=2, b_blocknr=8 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 b_state=0x00000029, b_size=512 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xbbb/0x1170 kernel/hung_task.c:287 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 kthread+0x357/0x430 kernel/kthread.c:246 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: __find_get_block_slow() failed. block=2, b_blocknr=8 NMI backtrace for cpu 0 CPU: 0 PID: 11172 Comm: syz-executor0 Not tainted 5.0.0-rc1+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_acquire+0x178/0x570 kernel/locking/lockdep.c:3839 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 cd 02 00 00 83 7c 08 00 00 01 00 00 00 0f 1f 44 00 00 65 8b 05 d2 39 9d 7e RSP: 0018:ffff888057c16cc8 EFLAGS: 00000046 RAX: 0000000000000007 RBX: ffff88804b83c6c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88804b83cf3c RBP: ffff888057c16d98 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff888057c16d70 R12: ffffffff899994d8 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fcf5d78b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000008a7c1000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 console_unlock+0x238/0x11e0 kernel/printk/printk.c:2349 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 __find_get_block_slow fs/buffer.c:231 [inline] __find_get_block fs/buffer.c:1294 [inline] __find_get_block.cold+0x36/0xfb fs/buffer.c:1288 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x295/0xd20 fs/buffer.c:1320 __bread_gfp+0x2f/0x300 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x586/0xa40 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_get_short_entry+0x146/0x2f0 fs/fat/dir.c:878 fat_scan+0x10d/0x330 fs/fat/dir.c:963 msdos_create+0x22f/0x710 fs/fat/namei_msdos.c:281 lookup_open+0x1332/0x1b80 fs/namei.c:3234 do_last fs/namei.c:3324 [inline] path_openat+0x1983/0x5650 fs/namei.c:3534 do_filp_open+0x26f/0x370 fs/namei.c:3564 do_sys_open+0x59a/0x7c0 fs/open.c:1063 __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 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcf5d78ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000004 RSI: 0000000000141042 RDI: 0000000020000300 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcf5d78b6d4 R13: 00000000004f471f R14: 00000000004d6d30 R15: 00000000ffffffff INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.351 msecs