device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 INFO: task syz-executor0:9141 blocked for more than 140 seconds. b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 Not tainted 5.0.0-rc2+ #30 __find_get_block_slow() failed. block=1, b_blocknr=8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 syz-executor0 D27144 9141 8448 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 schedule+0xfe/0x350 kernel/sched/core.c:3516 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 device loop0 blocksize: 4096 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 inode_lock include/linux/fs.h:757 [inline] do_last fs/namei.c:3321 [inline] path_openat+0x1967/0x5650 fs/namei.c:3534 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 do_filp_open+0x26f/0x370 fs/namei.c:3564 do_sys_open+0x59a/0x7c0 fs/open.c:1063 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=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 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 device loop0 blocksize: 4096 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 __find_get_block_slow() failed. block=1, b_blocknr=8 RSP: 002b:00007f150c94bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099 RDX: 0000000000000000 RSI: 00000000000001fe RDI: 0000000020000080 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c94c6d4 R13: 00000000004f4bff R14: 00000000004d7108 R15: 00000000ffffffff INFO: task syz-executor0:9181 blocked for more than 140 seconds. b_state=0x00000021, b_size=512 Not tainted 5.0.0-rc2+ #30 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D27576 9181 8448 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 device loop0 blocksize: 4096 schedule+0xfe/0x350 kernel/sched/core.c:3516 __find_get_block_slow() failed. block=1, b_blocknr=8 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 b_state=0x00000021, 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: 4096 inode_lock include/linux/fs.h:757 [inline] generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 call_write_iter include/linux/fs.h:1862 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x764/0xb40 fs/read_write.c:487 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0x105/0x260 fs/read_write.c:598 device loop0 blocksize: 4096 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 __find_get_block_slow() failed. block=1, b_blocknr=8 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 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:00007f150c92ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099 RDX: 000000000000002e RSI: 0000000020000100 RDI: 0000000000000006 RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c92b6d4 R13: 00000000004c734d R14: 00000000004dcc28 R15: 00000000ffffffff INFO: task syz-executor0:9187 blocked for more than 140 seconds. Not tainted 5.0.0-rc2+ #30 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D27576 9187 8448 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 b_state=0x00000021, b_size=512 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write_nested+0xa9/0x130 kernel/locking/rwsem.c:195 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 inode_lock_nested include/linux/fs.h:792 [inline] filename_create+0x1a8/0x5a0 fs/namei.c:3635 user_path_create fs/namei.c:3693 [inline] do_mkdirat+0xcf/0x2f0 fs/namei.c:3831 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __do_sys_mkdir fs/namei.c:3855 [inline] __se_sys_mkdir fs/namei.c:3853 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3853 __find_get_block_slow() failed. block=1, b_blocknr=8 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 RIP: 0033:0x458099 b_state=0x00000021, b_size=512 Code: Bad RIP value. device loop0 blocksize: 4096 RSP: 002b:00007f150c909c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 __find_get_block_slow() failed. block=1, b_blocknr=8 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458099 b_state=0x00000021, b_size=512 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020001540 device loop0 blocksize: 4096 RBP: 000000000073c180 R08: 0000000000000000 R09: 0000000000000000 __find_get_block_slow() failed. block=1, b_blocknr=8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c90a6d4 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 R13: 00000000004bd827 R14: 00000000004d6bf8 R15: 00000000ffffffff b_state=0x00000021, b_size=512 INFO: task syz-executor0:9188 blocked for more than 140 seconds. device loop0 blocksize: 4096 Not tainted 5.0.0-rc2+ #30 __find_get_block_slow() failed. block=1, b_blocknr=8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 syz-executor0 D24040 9188 8448 0x80000004 b_state=0x00000021, b_size=512 Call Trace: device loop0 blocksize: 4096 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 schedule+0xfe/0x350 kernel/sched/core.c:3516 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 b_state=0x00000021, 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: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 inode_lock include/linux/fs.h:757 [inline] generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 call_write_iter include/linux/fs.h:1862 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x764/0xb40 fs/read_write.c:487 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 __kernel_write+0x110/0x3b0 fs/read_write.c:506 device loop0 blocksize: 4096 write_pipe_buf+0x180/0x240 fs/splice.c:797 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x39a/0x7e0 fs/splice.c:627 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 splice_from_pipe+0x1ea/0x310 fs/splice.c:662 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 default_file_splice_write+0x3c/0x90 fs/splice.c:809 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x126/0x1a0 fs/splice.c:1023 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 splice_direct_to_actor+0x3be/0x9d0 fs/splice.c:978 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 do_splice_direct+0x2c7/0x420 fs/splice.c:1066 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 do_sendfile+0x61a/0xe60 fs/read_write.c:1436 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __do_sys_sendfile64 fs/read_write.c:1491 [inline] __se_sys_sendfile64 fs/read_write.c:1483 [inline] __x64_sys_sendfile64+0x15a/0x240 fs/read_write.c:1483 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 RIP: 0033:0x458099 __find_get_block_slow() failed. block=1, b_blocknr=8 Code: Bad RIP value. b_state=0x00000021, b_size=512 RSP: 002b:00007f150c8e8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 device loop0 blocksize: 4096 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458099 __find_get_block_slow() failed. block=1, b_blocknr=8 RDX: 0000000020000000 RSI: 0000000000000006 RDI: 0000000000000006 b_state=0x00000021, b_size=512 RBP: 000000000073c220 R08: 0000000000000000 R09: 0000000000000000 device loop0 blocksize: 4096 R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f150c8e96d4 R13: 00000000004c4f73 R14: 00000000004d8a28 R15: 00000000ffffffff __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 Showing all locks held in the system: b_state=0x00000021, b_size=512 1 lock held by khungtaskd/1040: device loop0 blocksize: 4096 #0: 00000000bcd87c42 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by rsyslogd/8285: b_state=0x00000021, b_size=512 #0: 0000000076a3a336 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 device loop0 blocksize: 4096 2 locks held by getty/8407: #0: 000000004ca49d1a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 000000006d259d71 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 b_state=0x00000021, b_size=512 2 locks held by getty/8408: device loop0 blocksize: 4096 #0: 00000000c75f7ab2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007d46b8fe (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8409: #0: 0000000022ed3b2a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001e7c6736 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8410: #0: 000000007584376e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003359136b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8411: #0: 00000000d089aa40 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 0000000062e4c521 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 b_state=0x00000021, b_size=512 2 locks held by getty/8412: device loop0 blocksize: 4096 #0: 000000005ba3dd53 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fc236b8f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=1, b_blocknr=8 2 locks held by getty/8413: b_state=0x00000021, b_size=512 #0: 00000000eafb09bb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 4096 #1: 000000009f2bc975 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 2 locks held by syz-executor0/9128: b_state=0x00000021, b_size=512 7 locks held by syz-executor0/9138: device loop0 blocksize: 4096 1 lock held by syz-executor0/9141: #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock include/linux/fs.h:757 [inline] #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21){++++}, at: do_last fs/namei.c:3321 [inline] #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21){++++}, at: path_openat+0x1967/0x5650 fs/namei.c:3534 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 3 locks held by syz-executor0/9181: b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 0000000088ef4406 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 #1: 00000000411c9b31 (sb_writers#14){.+.+}, at: file_start_write include/linux/fs.h:2815 [inline] #1: 00000000411c9b31 (sb_writers#14){.+.+}, at: vfs_write+0x429/0x580 fs/read_write.c:548 __find_get_block_slow() failed. block=1, b_blocknr=8 #2: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock include/linux/fs.h:757 [inline] #2: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358 1 lock held by syz-executor0/9187: #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline] #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21/1){+.+.}, at: filename_create+0x1a8/0x5a0 fs/namei.c:3635 2 locks held by syz-executor0/9188: b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000411c9b31 (sb_writers#14){.+.+}, at: file_start_write include/linux/fs.h:2815 [inline] #0: 00000000411c9b31 (sb_writers#14){.+.+}, at: do_sendfile+0xad7/0xe60 fs/read_write.c:1435 b_state=0x00000021, b_size=512 #1: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock include/linux/fs.h:757 [inline] #1: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358 device loop0 blocksize: 4096 ============================================= __find_get_block_slow() failed. block=1, b_blocknr=8 NMI backtrace for cpu 1 b_state=0x00000021, b_size=512 CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc2+ #30 device loop0 blocksize: 4096 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __find_get_block_slow() failed. block=1, b_blocknr=8 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 b_state=0x00000021, b_size=512 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 device loop0 blocksize: 4096 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 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000021, b_size=512 kthread+0x357/0x430 kernel/kthread.c:246 device loop0 blocksize: 4096 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=1, b_blocknr=8 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.474 msecs NMI backtrace for cpu 0 CPU: 0 PID: 9128 Comm: syz-executor0 Not tainted 5.0.0-rc2+ #30 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_is_held+0x9c/0x140 kernel/locking/lockdep.c:3659 Code: 08 00 00 85 c0 7f 23 e9 88 00 00 00 41 0f b6 45 00 41 83 c6 01 84 c0 74 08 3c 03 0f 8e 92 00 00 00 44 39 b3 78 08 00 00 7e 6a <48> 8b 4d d0 49 63 c6 4c 89 e6 48 8d 04 80 4c 8d 3c c1 4c 89 ff e8 RSP: 0018:ffff8880ae607be8 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff88805909a440 RCX: dffffc0000000000 RDX: ffffed1015cc0f66 RSI: 0000000000000000 RDI: ffff88805909ad32 RBP: ffff8880ae607c28 R08: ffff88805909a440 R09: ffffed1015cc5b90 R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: ffffffff899a3e80 R13: ffffed100b213597 R14: 0000000000000003 R15: ffff88805909ad10 FS: 00007f150c98e700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045806f CR3: 00000000936dc000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held_type+0x110/0x210 kernel/locking/lockdep.c:3879 lock_is_held include/linux/lockdep.h:337 [inline] rcu_read_lock_sched_held+0x110/0x130 kernel/rcu/update.c:117 trace_hrtimer_cancel include/trace/events/timer.h:285 [inline] debug_deactivate kernel/time/hrtimer.c:463 [inline] __run_hrtimer kernel/time/hrtimer.c:1359 [inline] __hrtimer_run_queues+0xd98/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1697 [inline] RIP: 0010:vprintk_emit+0x84c/0x960 kernel/printk/printk.c:1930 Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 ef 00 00 00 48 83 3d c4 54 2a 08 00 74 2d e8 fd d2 19 00 48 8b bd 10 ff ff ff 57 9d <0f> 1f 44 00 00 e9 a3 fe ff ff e8 e5 d2 19 00 0f 0b e8 de d2 19 00 RSP: 0018:ffff888056046d60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 1ffff1100ac08db2 RCX: ffffc90005e5f000 RDX: 0000000000040000 RSI: ffffffff81682bf3 RDI: 0000000000000246 RBP: ffff888056046e58 R08: 0000000000000006 R09: ffff88805909ad30 R10: ffff88805909a440 R11: 0000000000000000 R12: 0000000000000200 R13: ffffed100ac08dbc R14: 0000000000000000 R15: ffff888056046e30 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_search_long+0x345/0x17d0 fs/fat/dir.c:479 vfat_find+0x10e/0x140 fs/fat/namei_vfat.c:697 vfat_lookup+0x10a/0x6b0 fs/fat/namei_vfat.c:711 lookup_open+0x726/0x1b80 fs/namei.c:3213 do_last fs/namei.c:3324 [inline] path_openat+0x25fd/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: 0033:0x458099 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:00007f150c98dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c98e6d4 R13: 00000000004f4bff R14: 00000000004d7108 R15: 00000000ffffffff