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 INFO: task kworker/1:3:7865 blocked for more than 120 seconds. Not tainted 4.9.98-ga03d0bb #18 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D28936 7865 2 0x00000000 Workqueue: events_power_efficient reg_check_chans_work ffff8801ccb79800 ffff8801c6b6da40 ffff8801c6b6da40 ffff8801cb43b000 ffff8801db321b98 ffff8801ca687a18 ffffffff839e377d ffff8801ccb7a0c8 __find_get_block_slow() failed. block=1, b_blocknr=8 ffffed003996f418 ffff8801ccb79800 00fffc0000000000 ffff8801db322468 b_state=0x00000029, b_size=512 Call Trace: device loop0 blocksize: 4096 [] schedule+0x7f/0x1b0 kernel/sched/core.c:3557 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3590 [] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [] mutex_lock_nested+0x326/0x870 kernel/locking/mutex.c:621 __find_get_block_slow() failed. block=1, b_blocknr=8 [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 b_state=0x00000029, b_size=512 [] reg_check_chans_work+0x74/0xd90 net/wireless/reg.c:1652 [] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092 device loop0 blocksize: 4096 [] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 device loop0 blocksize: 4096 Showing all locks held in the system: 3 locks held by kworker/1:0/18: #0: ("%s"("ipv6_addrconf") __find_get_block_slow() failed. block=1, b_blocknr=8 ){.+.+..}, at: [] work_static include/linux/workqueue.h:186 [inline] ){.+.+..}, at: [] set_work_data kernel/workqueue.c:617 [inline] ){.+.+..}, at: [] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] ){.+.+..}, at: [] process_one_work+0x6ee/0x1500 kernel/workqueue.c:2085 b_state=0x00000029, b_size=512 (device loop0 blocksize: 4096 (addr_chk_work).work){+.+...}, at: [] process_one_work+0x728/0x1500 kernel/workqueue.c:2089 2 locks held by khungtaskd/519: #0: (rcu_read_lock){......}, at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 kernel/hung_task.c:239 #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336 __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by rsyslogd/3677: #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 fs/file.c:781 b_state=0x00000029, b_size=512 2 locks held by getty/3773: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367 #1: ( device loop0 blocksize: 4096 &ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133 3 locks held by kworker/1:3/7865: #0: ("events_power_efficient"){.+.+.+}, at: [] work_static include/linux/workqueue.h:186 [inline] #0: ("events_power_efficient"){.+.+.+}, at: [] set_work_data kernel/workqueue.c:617 [inline] #0: ("events_power_efficient"){.+.+.+}, at: [] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ("events_power_efficient"){.+.+.+}, at: [] process_one_work+0x6ee/0x1500 kernel/workqueue.c:2085 b_state=0x00000029, b_size=512 #1: ((reg_check_chans).work){+.+...}, at: [] process_one_work+0x728/0x1500 kernel/workqueue.c:2089 #2: ( device loop0 blocksize: 4096 rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 __find_get_block_slow() failed. block=1, b_blocknr=8 #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 1 lock held by syz-executor0/8951: #0: ( b_state=0x00000029, b_size=512 rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 1 lock held by syz-executor4/8952: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:70 [inline] #0: (rtnl_mutex){+.+.+.}, at: [] rtnetlink_rcv+0x1b/0x40 net/core/rtnetlink.c:4064 1 lock held by syz-executor7/8935: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 1 lock held by syz-executor7/8956: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 1 lock held by syz-executor1/8942: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 1 lock held by syz-executor1/8955: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 b_state=0x00000029, b_size=512 1 lock held by syz-executor1/8959: device loop0 blocksize: 4096 #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 1 lock held by init/8964: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 b_state=0x00000029, b_size=512 1 lock held by init/8965: device loop0 blocksize: 4096 #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/8966: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/8967: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/8968: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/8969: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 ============================================= NMI backtrace for cpu 0 __find_get_block_slow() failed. block=1, b_blocknr=8 CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.98-ga03d0bb #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 b_state=0x00000029, b_size=512 ffff8801d8bafd08 device loop0 blocksize: 4096 ffffffff81eb0e89 0000000000000000 0000000000000000 ffffffff81ebc187 0000000000000000 0000000000000000 0000000000000003 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99 [] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60 [] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [] 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 __find_get_block_slow() failed. block=1, b_blocknr=8 [] kthread+0x26d/0x300 kernel/kthread.c:211 b_state=0x00000029, b_size=512 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 device loop0 blocksize: 4096 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8927 Comm: syz-executor0 Not tainted 4.9.98-ga03d0bb #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801cb43b000 task.stack: ffff8801cb600000 RIP: 0010:[] c [] hlock_class kernel/locking/lockdep.c:142 [inline] RIP: 0010:[] c [] mark_lock+0x4e/0x1280 kernel/locking/lockdep.c:3039 RSP: 0018:ffff8801cb606e08 EFLAGS: 00000046 RAX: 000000000000054a RBX: ffff8801cb43b8c8 RCX: 0000000000000007 RDX: 1ffff1003968771d RSI: ffff8801cb43b8c8 RDI: ffff8801cb43b000 RBP: ffff8801cb606e50 R08: ffff8801cb43b8e8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cb43b8c8 R13: 0000000000000080 R14: 0000000000000007 R15: ffff8801cb43b000 FS: 00007fe1944d1700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000171fb10 CR3: 00000001cf09a000 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801cb606f2fc 1ffff100396c0dc5c ffffffff83cce0f7c ffffffff83cce0f8c 0000000000000000c ffff8801cb43b8c8c ffffed0039687718c ffff8801cb43b000c dffffc0000000000c ffff8801cb606ea0c ffffffff81233817c ffff88021fffd048c Call Trace: [] mark_held_locks+0xc7/0x130 kernel/locking/lockdep.c:2660 [] __trace_hardirqs_on_caller kernel/locking/lockdep.c:2689 [inline] [] trace_hardirqs_on_caller+0x38b/0x590 kernel/locking/lockdep.c:2736 [] trace_hardirqs_on_thunk+0x1a/0x1c [] retint_kernel+0x2d/0x2d [] vprintk+0x28/0x30 kernel/printk/printk.c:1913 [] vprintk_default+0x1d/0x30 kernel/printk/printk.c:1914 [] vprintk_func kernel/printk/internal.h:36 [inline] [] printk+0xaf/0xd7 kernel/printk/printk.c:1975 [] __find_get_block_slow.cold.57+0xcd/0xf0 fs/buffer.c:244 [] __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_slow+0x23e/0x470 fs/namei.c:1668 [] walk_component+0x716/0x1bb0 fs/namei.c:1784 [] link_path_walk+0x889/0x1200 fs/namei.c:2120 [] path_lookupat.isra.41+0x1b4/0x410 fs/namei.c:2282 [] do_o_path fs/namei.c:3493 [inline] [] path_openat+0x1fa9/0x3590 fs/namei.c:3522 [] do_filp_open+0x197/0x270 fs/namei.c:3568 [] do_sys_open+0x30d/0x5c0 fs/open.c:1072 [] SYSC_openat fs/open.c:1099 [inline] [] SyS_openat+0x30/0x40 fs/open.c:1093 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c48 cc1 cea c03 c41 cbd c01 c00 c00 c00 c41 c54 c41 cd3 ce5 c53 c48 c89 cf3 c48 c83 cec c20 c0f cb6 c04 c02 c84 cc0 c74 c08 c3c c01 c0f c8e cb0 c04 c00 c00 c0f cb7 c43 c20 c<66> ca9 cff c1f c74 c7b c48 cba c00 c00 c00 c00 c00 cfc cff cdf c4c c89 cc1 c48 cc1 c