device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 INFO: task kworker/u4:2:32 blocked for more than 140 seconds. b_state=0x00000029, b_size=512 Not tainted 4.20.0-rc6+ #374 device loop0 blocksize: 4096 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 kworker/u4:2 D13960 32 2 0x80000000 Workqueue: writeback wb_workfn (flush-7:0) b_state=0x00000029, b_size=512 Call Trace: device loop0 blocksize: 4096 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 schedule+0xfe/0x460 kernel/sched/core.c:3516 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 io_schedule+0x1c/0x70 kernel/sched/core.c:5137 b_state=0x00000029, b_size=512 wait_on_page_bit_common+0x75b/0x13d0 mm/filemap.c:1088 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 __lock_page+0x112/0x170 mm/filemap.c:1267 lock_page include/linux/pagemap.h:483 [inline] write_cache_pages+0xe60/0x1e20 mm/page-writeback.c:2197 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 mpage_writepages+0x14c/0x320 fs/mpage.c:730 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 fat_writepages+0x24/0x30 fs/fat/inode.c:198 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2328 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 __writeback_single_inode+0x20a/0x1660 fs/fs-writeback.c:1316 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 writeback_sb_inodes+0x71f/0x1210 fs/fs-writeback.c:1580 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __writeback_inodes_wb+0x1b9/0x340 fs/fs-writeback.c:1649 wb_writeback+0xa73/0xfc0 fs/fs-writeback.c:1758 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 wb_check_background_flush fs/fs-writeback.c:1826 [inline] wb_do_writeback fs/fs-writeback.c:1914 [inline] wb_workfn+0xd65/0x1790 fs/fs-writeback.c:1942 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task syz-executor0:6277 blocked for more than 140 seconds. __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 Not tainted 4.20.0-rc6+ #374 __find_get_block_slow() failed. block=1, b_blocknr=8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D23848 6277 5992 0x80000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 schedule+0xfe/0x460 kernel/sched/core.c:3516 b_state=0x00000029, b_size=512 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577 device loop0 blocksize: 4096 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 __find_get_block_slow() failed. block=1, b_blocknr=8 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 b_state=0x00000029, 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] generic_file_write_iter+0xe4/0x6b0 mm/filemap.c:3290 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 __kernel_write+0x10c/0x370 fs/read_write.c:506 write_pipe_buf+0x180/0x240 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x38b/0x7c0 fs/splice.c:627 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 splice_from_pipe+0x1ec/0x340 fs/splice.c:662 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 default_file_splice_write+0x3c/0x90 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x128/0x190 fs/splice.c:1023 device loop0 blocksize: 4096 splice_direct_to_actor+0x3ad/0x9d0 fs/splice.c:978 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 do_splice_direct+0x2d4/0x420 fs/splice.c:1066 device loop0 blocksize: 4096 do_sendfile+0x62a/0xe20 fs/read_write.c:1439 __find_get_block_slow() failed. block=1, b_blocknr=8 __do_sys_sendfile64 fs/read_write.c:1494 [inline] __se_sys_sendfile64 fs/read_write.c:1486 [inline] __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1486 b_state=0x00000029, b_size=512 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 device loop0 blocksize: 4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: Bad RIP value. __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 RSP: 002b:00007f4944dd1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 b_state=0x00000029, b_size=512 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457669 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 RDX: 0000000020000000 RSI: 0000000000000004 RDI: 0000000000000004 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 RBP: 000000000072c180 R08: 0000000000000000 R09: 0000000000000000 __find_get_block_slow() failed. block=1, b_blocknr=8 R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f4944dd26d4 b_state=0x00000029, b_size=512 R13: 00000000004c3e0b R14: 00000000004d6c20 R15: 00000000ffffffff device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 INFO: task syz-executor0:6282 blocked for more than 140 seconds. b_state=0x00000029, b_size=512 Not tainted 4.20.0-rc6+ #374 device loop0 blocksize: 4096 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. __find_get_block_slow() failed. block=1, b_blocknr=8 syz-executor0 D24648 6282 5992 0x00000004 b_state=0x00000029, b_size=512 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 schedule+0xfe/0x460 kernel/sched/core.c:3516 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:757 [inline] do_last fs/namei.c:3321 [inline] path_openat+0x15c4/0x5150 fs/namei.c:3534 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 b_state=0x00000029, b_size=512 ksys_open include/linux/syscalls.h:1279 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 RIP: 0033:0x457669 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4944d8fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 __find_get_block_slow() failed. block=1, b_blocknr=8 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457669 RDX: 0000000000000000 RSI: 0000000000000041 RDI: 0000000020000400 RBP: 000000000072c2c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4944d906d4 b_state=0x00000029, b_size=512 R13: 00000000004bdd13 R14: 00000000004cd7b8 R15: 00000000ffffffff Showing all locks held in the system: 3 locks held by kworker/u4:2/32: #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: __write_once_size include/linux/compiler.h:209 [inline] #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000767f1282 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124 device loop0 blocksize: 4096 #1: 000000009f05f2f7 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128 __find_get_block_slow() failed. block=1, b_blocknr=8 #2: 00000000d6d4ddaa (&type->s_umount_key#75){++++}, at: trylock_super+0x22/0x110 fs/super.c:412 1 lock held by khungtaskd/1019: #0: 00000000e73990c3 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 1 lock held by rsyslogd/5862: b_state=0x00000029, b_size=512 2 locks held by getty/5952: #0: 000000001cad3760 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000005fd7b0c8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop0 blocksize: 4096 2 locks held by getty/5953: #0: 000000004ac34466 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000707dd2fa (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=1, b_blocknr=8 2 locks held by getty/5954: #0: 000000004a728cc5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000094234402 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5955: #0: 0000000054ada829 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000b6cbe01d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5956: #0: 00000000e960b42e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000500d303d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5957: #0: 000000000cbc07e7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000991893ef (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5958: b_state=0x00000029, b_size=512 #0: 000000004ea8e12c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 device loop0 blocksize: 4096 #1: 000000003b8cc258 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 5 locks held by syz-executor0/6228: 2 locks held by syz-executor0/6243: 2 locks held by syz-executor0/6277: #0: 00000000f6beaf57 (sb_writers#19){.+.+}, at: file_start_write include/linux/fs.h:2810 [inline] #0: 00000000f6beaf57 (sb_writers#19){.+.+}, at: do_sendfile+0xac0/0xe20 fs/read_write.c:1438 #1: 0000000004a073d5 (&sb->s_type->i_mutex_key#27){++++}, at: inode_lock include/linux/fs.h:757 [inline] #1: 0000000004a073d5 (&sb->s_type->i_mutex_key#27){++++}, at: generic_file_write_iter+0xe4/0x6b0 mm/filemap.c:3290 __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by syz-executor0/6282: #0: 000000000527c03d (&sb->s_type->i_mutex_key#27){++++}, at: inode_lock include/linux/fs.h:757 [inline] #0: 000000000527c03d (&sb->s_type->i_mutex_key#27){++++}, at: do_last fs/namei.c:3321 [inline] #0: 000000000527c03d (&sb->s_type->i_mutex_key#27){++++}, at: path_openat+0x15c4/0x5150 fs/namei.c:3534 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1019 Comm: khungtaskd Not tainted 4.20.0-rc6+ #374 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 b_state=0x00000029, b_size=512 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 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:205 [inline] watchdog+0xb51/0x1060 kernel/hung_task.c:289 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6228 Comm: syz-executor0 Not tainted 4.20.0-rc6+ #374 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.846 msecs Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_is_held_type+0xef/0x210 kernel/locking/lockdep.c:3881 Code: 1f 44 00 00 65 4c 8b 24 25 40 ee 01 00 49 8d bc 24 7c 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 <48> 89 fa 83 e2 07 83 c2 03 38 c2 7c 08 84 c0 0f 85 cb 00 00 00 41 RSP: 0018:ffff8881dae07010 EFLAGS: 00000803 RAX: 0000000000000000 RBX: 0000000000000086 RCX: 0000000000000000 RDX: 1ffff1102f66e197 RSI: 00000000ffffffff RDI: ffff88817b370cbc RBP: ffff8881dae07030 R08: ffff88817b370440 R09: ffffed103b5c5b5f R10: ffffed103b5c5b5f R11: ffff8881dae2dafb R12: ffff88817b370440 R13: ffffffff8959bec0 R14: ffff8881dae25dc0 R15: dffffc0000000000 FS: 00007f4944e56700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045763f CR3: 000000017ef7b000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:339 [inline] rcu_read_lock_sched_held+0x14f/0x180 kernel/rcu/update.c:117 trace_hrtimer_expire_entry include/trace/events/timer.h:228 [inline] __run_hrtimer kernel/time/hrtimer.c:1397 [inline] __hrtimer_run_queues+0xde7/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:load_balance+0x1d01/0x39a0 kernel/sched/fair.c:8748 Code: 89 49 8b 86 20 fd ff ff 48 c1 ea 03 42 80 3c 2a 00 0f 85 4a 15 00 00 48 83 3d 0a 27 f6 07 00 0f 84 c8 00 00 00 48 89 c7 57 9d <0f> 1f 44 00 00 e9 72 f8 ff ff 48 8b 85 d0 fc ff ff be ff ff ff ff RSP: 0018:ffff8881dae075b0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000286 RBX: ffff8881dae2cc80 RCX: 1ffff1102f66e1b0 RDX: 1ffffffff12a401e RSI: ffff88817b370d88 RDI: 0000000000000286 RBP: ffff8881dae079a8 R08: ffff88817b370d80 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88817b370440 R12: ffff8881dae07720 R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881c39ce240 rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:9109 run_rebalance_domains+0x38d/0x500 kernel/sched/fair.c:9731 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1688 [inline] RIP: 0010:vprintk_emit+0x87d/0x990 kernel/printk/printk.c:1921 Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 de 00 00 00 48 83 3d 33 44 ec 07 00 74 34 e8 ac c7 19 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 aa fe ff ff e8 94 c7 19 00 0f 0b e8 8d c7 19 00 RSP: 0018:ffff888180516730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 1ffff110300a2cec RCX: ffffc90005dd6000 RDX: 0000000000040000 RSI: ffffffff8165bcc4 RDI: 0000000000000246 RBP: ffff8881805168a8 R08: ffff88817b370d80 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88817b370440 R12: 0000000000000200 R13: 0000000000000000 R14: ffffed10300a2d00 R15: ffff888180516880 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 __find_get_block_slow fs/buffer.c:235 [inline] __find_get_block.cold.57+0x85/0xff 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] fat_ent_bread+0x173/0x290 fs/fat/fatent.c:107 fat_ent_read_block fs/fat/fatent.c:442 [inline] fat_alloc_clusters+0x8db/0x16f0 fs/fat/fatent.c:490 fat_add_cluster+0x84/0x160 fs/fat/inode.c:101 __fat_get_block fs/fat/inode.c:148 [inline] fat_get_block+0x385/0xb30 fs/fat/inode.c:183 __block_write_begin_int+0x5ef/0x1d90 fs/buffer.c:1966 __block_write_begin fs/buffer.c:2016 [inline] block_write_begin+0xda/0x370 fs/buffer.c:2075 cont_wr Lost 47 message(s)!