__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 INFO: task syz-executor0:9374 blocked for more than 140 seconds. device loop0 blocksize: 2048 Not tainted 4.9.124-g09eb2ba #31 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. __find_get_block_slow() failed. block=2, b_blocknr=8 syz-executor0 D b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 29400 9374 3867 0x00000004 b_state=0x00000029, b_size=512 ffff8801981e3000 device loop0 blocksize: 2048 ffff8801d9314540 ffff8801ca645f80__find_get_block_slow() failed. block=2, b_blocknr=8 ffff8801c8269800b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 ffff8801db321c18 ffff8801cc4df8b0 __find_get_block_slow() failed. block=2, b_blocknr=8 ffffffff839f0afdb_state=0x00000029, b_size=512 ffffffff81237da7device loop0 blocksize: 2048 0000000000000000 ffff8801981e38c0 __find_get_block_slow() failed. block=2, b_blocknr=8 0000000600000007b_state=0x00000029, b_size=512 ffff8801db3224e8device loop0 blocksize: 2048 Call Trace: __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+0x7f/0x1b0 kernel/sched/core.c:3553 b_state=0x00000029, b_size=512 [] rwsem_down_read_failed+0x1e4/0x320 kernel/locking/rwsem-xadd.c:260 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 [] call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 [] __down_read arch/x86/include/asm/rwsem.h:65 [inline] [] down_read+0x52/0xb0 kernel/locking/rwsem.c:24 b_state=0x00000029, b_size=512 [] inode_lock_shared include/linux/fs.h:776 [inline] [] do_last fs/namei.c:3314 [inline] [] path_openat+0x17dc/0x3590 fs/namei.c:3534 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 [] do_filp_open+0x197/0x270 fs/namei.c:3568 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 [] do_sys_open+0x30d/0x5c0 fs/open.c:1072 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 [] SYSC_open fs/open.c:1090 [inline] [] SyS_open+0x2d/0x40 fs/open.c:1085 __find_get_block_slow() failed. block=2, b_blocknr=8 b_state=0x00000029, b_size=512 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 device loop0 blocksize: 2048 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb __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 Showing all locks held in the system: b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 2 locks held by khungtaskd/519: #0: (rcu_read_lock __find_get_block_slow() failed. block=2, b_blocknr=8 ){......}b_state=0x00000029, b_size=512 , at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] , at: [] watchdog+0x11c/0xa20 kernel/hung_task.c:239 #1: (tasklist_lock __find_get_block_slow() failed. block=2, b_blocknr=8 ){.+.+..}b_state=0x00000029, b_size=512 , at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/3675: __find_get_block_slow() failed. block=2, b_blocknr=8 #0: b_state=0x00000029, b_size=512 (device loop0 blocksize: 2048 &f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 fs/file.c:781 2 locks held by getty/3771: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (&tty->ldisc_sem){++++++}__find_get_block_slow() failed. block=2, b_blocknr=8 , at: [] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367 #1: device loop0 blocksize: 2048 (&ldata->atomic_read_lock){+.+...}__find_get_block_slow() failed. block=2, b_blocknr=8 , at: [] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142 device loop0 blocksize: 2048 1 lock held by syz-executor0/9374: #0: __find_get_block_slow() failed. block=2, b_blocknr=8 (b_state=0x00000029, b_size=512 &sb->s_type->i_mutex_keydevice loop0 blocksize: 2048 #23){++++++}, at: [] inode_lock_shared include/linux/fs.h:776 [inline] #23){++++++}, at: [] do_last fs/namei.c:3314 [inline] #23){++++++}, at: [] path_openat+0x17dc/0x3590 fs/namei.c:3534 1 lock held by syz-executor0/9377: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 fs/file.c:781 1 lock held by syz-executor0/9378: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (&sb->s_type->i_mutex_key#23){++++++}__find_get_block_slow() failed. block=2, b_blocknr=8 , at: [] inode_lock include/linux/fs.h:766 [inline] , at: [] do_last fs/namei.c:3312 [inline] , at: [] path_openat+0xed5/0x3590 fs/namei.c:3534 3 locks held by syz-executor0/9379: device loop0 blocksize: 2048 #0: (&f->f_pos_lock){+.+.+.} __find_get_block_slow() failed. block=2, b_blocknr=8 , at: [] __fdget_pos+0xac/0xd0 fs/file.c:781 #1: device loop0 blocksize: 2048 (sb_writers#16){.+.+.+}__find_get_block_slow() failed. block=2, b_blocknr=8 , at: [] file_start_write include/linux/fs.h:2640 [inline] , at: [] vfs_write+0x3ae/0x530 fs/read_write.c:556 #2: device loop0 blocksize: 2048 (&sb->s_type->i_mutex_key#23){++++++}__find_get_block_slow() failed. block=2, b_blocknr=8 , at: [] inode_lock include/linux/fs.h:766 [inline] , at: [] generic_file_write_iter+0x9d/0x610 mm/filemap.c:2903 1 lock held by init/9383: device loop0 blocksize: 2048 #0: (tty_mutex __find_get_block_slow() failed. block=2, b_blocknr=8 ){+.+.+.}b_state=0x00000029, b_size=512 , at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] , at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/9384: #0: __find_get_block_slow() failed. block=2, b_blocknr=8 (b_state=0x00000029, b_size=512 tty_mutexdevice loop0 blocksize: 2048 ){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] ){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/9385: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/9386: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/9387: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/9388: b_state=0x00000029, b_size=512 #0: device loop0 blocksize: 2048 (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 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 CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.124-g09eb2ba #31 device loop0 blocksize: 2048 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __find_get_block_slow() failed. block=2, b_blocknr=8 ffff8801d8087d08 b_state=0x00000029, b_size=512 ffffffff81eb95e9device loop0 blocksize: 2048 0000000000000000 0000000000000001 0000000000000001 b_state=0x00000029, b_size=512 0000000000000001device loop0 blocksize: 2048 ffffffff810b9fa0 ffff8801d8087d40 ffffffff81ec4927 b_state=0x00000029, b_size=512 0000000000000001device loop0 blocksize: 2048 0000000000000000 0000000000000003 Call Trace: b_state=0x00000029, b_size=512 [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 [] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99 b_state=0x00000029, b_size=512 device loop0 blocksize: 2048 [] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60 __find_get_block_slow() failed. block=2, b_blocknr=8 [] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 b_state=0x00000029, b_size=512 [] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog+0x6b4/0xa20 kernel/hung_task.c:239 device loop0 blocksize: 2048 __find_get_block_slow() failed. block=2, b_blocknr=8 [] kthread+0x26d/0x300 kernel/kthread.c:211 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 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 b_state=0x00000029, b_size=512 Sending NMI from CPU 1 to CPUs 0: device loop0 blocksize: 2048 NMI backtrace for cpu 0 CPU: 0 PID: 9329 Comm: syz-executor0 Not tainted 4.9.124-g09eb2ba #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801b58cc800 task.stack: ffff8801b9540000 RIP: 0010:[] c [] debug_lockdep_rcu_enabled+0x68/0x90 kernel/rcu/update.c:264 RSP: 0018:ffff8801b95472f8 EFLAGS: 00000297 RAX: 0000000000000003 RBX: ffffea0006f5d240 RCX: ffffc90000b2f000 RDX: 0000000000000004 RSI: ffffffff8143b12f RDI: ffffffff84871040 RBP: ffff8801b95472f8 R08: ffff8801b58cd138 R09: 0000000000000001 R10: ffff8801b58cc800 R11: 1ffff10036b19a22 R12: ffff8801cbd67470 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8801d5dc6548 FS: 00007ff4f5f2f700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe228961a30 CR3: 00000001cbbc5000 CR4: 00000000001606f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Stack: ffff8801b9547360c ffffffff8143b14ec ffffffff8143b090c ffffed0036b19a18c ffff8801b58cd0c8c 0000000000000001c ffff8801d5dc6550c ffffea0006f5d240c ffff8801d5dc6548c 0000000000000001c dffffc0000000000c 0000000000000000c Call Trace: [] radix_tree_deref_slot include/linux/radix-tree.h:199 [inline] [] find_get_entry+0xbe/0x540 mm/filemap.c:1095 [] pagecache_get_page+0x4b/0x720 mm/filemap.c:1201 [] find_get_page_flags include/linux/pagemap.h:264 [inline] [] __find_get_block_slow+0xc2/0x330 fs/buffer.c:212 [] __find_get_block+0x23e/0x4c0 fs/buffer.c:1360 [] __getblk_slow fs/buffer.c:1101 [inline] [] __getblk_gfp+0x189/0x710 fs/buffer.c:1386 [] __bread_gfp+0x2d/0x270 fs/buffer.c:1420 [] sb_bread include/linux/buffer_head.h:300 [inline] [] fat__get_entry+0x4c8/0x8f0 fs/fat/dir.c:100 [] fat_get_entry fs/fat/dir.c:128 [inline] [] fat_get_short_entry+0x131/0x2a0 fs/fat/dir.c:876 [] fat_scan+0xfd/0x340 fs/fat/dir.c:961 [] msdos_find+0xf9/0x2d0 fs/fat/namei_msdos.c:128 [] msdos_lookup+0x135/0x250 fs/fat/namei_msdos.c:208 [] lookup_open+0x63d/0x1930 fs/namei.c:3203 [] do_last fs/namei.c:3315 [inline] [] path_openat+0xef8/0x3590 fs/namei.c:3534 [] do_filp_open+0x197/0x270 fs/namei.c:3568 [] do_sys_open+0x30d/0x5c0 fs/open.c:1072 [] SYSC_open fs/open.c:1090 [inline] [] SyS_open fs/open.c:1085 [inline] [] SYSC_creat fs/open.c:1110 [inline] [] SyS_creat+0x27/0x30 fs/open.c:1108 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: cc7 c40 c10 c87 c84 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c48 c89 cfa c48 cc1 cea c03 c0f cb6 c14 c02 c48 c89 cf8 c83 ce0 c07 c83 cc0 c03 c38 cd0 c7c c04 c84 cd2 c75 c1c c<8b> c05 ca2 c2e c5f c03 c85 cc0 c74 c07 ce8 c29 cff cff cff c5d cc3 c31 cc0 c5d cc3 c __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 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