INFO: task syz-executor.2:8799 blocked for more than 143 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:24440 pid: 8799 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x8b8/0x2180 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 wb_wait_for_completion+0x15a/0x200 fs/fs-writeback.c:209 sync_inodes_sb+0x18b/0x8a0 fs/fs-writeback.c:2577 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x10b/0x1f0 fs/sync.c:48 generic_shutdown_super+0x64/0x320 fs/super.c:448 kill_block_super+0x90/0xd0 fs/super.c:1394 deactivate_locked_super+0x7b/0x130 fs/super.c:335 cleanup_mnt+0x326/0x4c0 fs/namespace.c:1136 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466ce7 RSP: 002b:00007fffe737f2b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ce7 RDX: 00007fffe737f389 RSI: 0000000000000002 RDI: 00007fffe737f380 RBP: 00007fffe737f380 R08: 00000000ffffffff R09: 00007fffe737f150 R10: 00000000026e78ab R11: 0000000000000246 R12: 00000000004ae4e4 R13: 00007fffe7380430 R14: 00000000026e7810 R15: 0000000000000002 INFO: task syz-executor.5:8801 blocked for more than 143 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24376 pid: 8801 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x8b8/0x2180 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 wb_wait_for_completion+0x15a/0x200 fs/fs-writeback.c:209 sync_inodes_sb+0x18b/0x8a0 fs/fs-writeback.c:2577 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x10b/0x1f0 fs/sync.c:48 generic_shutdown_super+0x64/0x320 fs/super.c:448 kill_block_super+0x90/0xd0 fs/super.c:1394 deactivate_locked_super+0x7b/0x130 fs/super.c:335 cleanup_mnt+0x326/0x4c0 fs/namespace.c:1136 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466ce7 RSP: 002b:00007ffe09eb6ca8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ce7 RDX: 00007ffe09eb6d79 RSI: 0000000000000002 RDI: 00007ffe09eb6d70 RBP: 00007ffe09eb6d70 R08: 00000000ffffffff R09: 00007ffe09eb6b40 R10: 00000000033da8ab R11: 0000000000000246 R12: 00000000004ae4e4 R13: 00007ffe09eb7e20 R14: 00000000033da810 R15: 0000000000000002 INFO: task syz-executor.3:8802 blocked for more than 143 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24376 pid: 8802 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x8b8/0x2180 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 wb_wait_for_completion+0x15a/0x200 fs/fs-writeback.c:209 sync_inodes_sb+0x18b/0x8a0 fs/fs-writeback.c:2577 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x10b/0x1f0 fs/sync.c:48 generic_shutdown_super+0x64/0x320 fs/super.c:448 kill_block_super+0x90/0xd0 fs/super.c:1394 deactivate_locked_super+0x7b/0x130 fs/super.c:335 cleanup_mnt+0x326/0x4c0 fs/namespace.c:1136 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466ce7 RSP: 002b:00007ffe3834b1f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ce7 RDX: 00007ffe3834b2c9 RSI: 0000000000000002 RDI: 00007ffe3834b2c0 RBP: 00007ffe3834b2c0 R08: 00000000ffffffff R09: 00007ffe3834b090 R10: 0000000002b598ab R11: 0000000000000246 R12: 00000000004ae4e4 R13: 00007ffe3834c370 R14: 0000000002b59810 R15: 0000000000000002 INFO: task syz-executor.1:8806 blocked for more than 144 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:24312 pid: 8806 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x8b8/0x2180 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 wb_wait_for_completion+0x15a/0x200 fs/fs-writeback.c:209 sync_inodes_sb+0x18b/0x8a0 fs/fs-writeback.c:2577 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x10b/0x1f0 fs/sync.c:48 generic_shutdown_super+0x64/0x320 fs/super.c:448 kill_block_super+0x90/0xd0 fs/super.c:1394 deactivate_locked_super+0x7b/0x130 fs/super.c:335 cleanup_mnt+0x326/0x4c0 fs/namespace.c:1136 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466ce7 RSP: 002b:00007fff6d40f4e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ce7 RDX: 00007fff6d40f5b9 RSI: 0000000000000002 RDI: 00007fff6d40f5b0 RBP: 00007fff6d40f5b0 R08: 00000000ffffffff R09: 00007fff6d40f380 R10: 0000000001d518ab R11: 0000000000000246 R12: 00000000004ae4e4 R13: 00007fff6d410660 R14: 0000000001d51810 R15: 0000000000000002 INFO: task syz-executor.4:8807 blocked for more than 144 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24376 pid: 8807 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x8b8/0x2180 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 wb_wait_for_completion+0x15a/0x200 fs/fs-writeback.c:209 sync_inodes_sb+0x18b/0x8a0 fs/fs-writeback.c:2577 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x10b/0x1f0 fs/sync.c:48 generic_shutdown_super+0x64/0x320 fs/super.c:448 kill_block_super+0x90/0xd0 fs/super.c:1394 deactivate_locked_super+0x7b/0x130 fs/super.c:335 cleanup_mnt+0x326/0x4c0 fs/namespace.c:1136 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466ce7 RSP: 002b:00007fff9de49158 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ce7 RDX: 00007fff9de49229 RSI: 0000000000000002 RDI: 00007fff9de49220 RBP: 00007fff9de49220 R08: 00000000ffffffff R09: 00007fff9de48ff0 R10: 0000000001bfb8ab R11: 0000000000000246 R12: 00000000004ae4e4 R13: 00007fff9de4a2d0 R14: 0000000001bfb810 R15: 0000000000000002 INFO: task syz-executor.0:8808 blocked for more than 144 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24312 pid: 8808 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x8b8/0x2180 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 wb_wait_for_completion+0x15a/0x200 fs/fs-writeback.c:209 sync_inodes_sb+0x18b/0x8a0 fs/fs-writeback.c:2577 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x10b/0x1f0 fs/sync.c:48 generic_shutdown_super+0x64/0x320 fs/super.c:448 kill_block_super+0x90/0xd0 fs/super.c:1394 deactivate_locked_super+0x7b/0x130 fs/super.c:335 cleanup_mnt+0x326/0x4c0 fs/namespace.c:1136 task_work_run+0xc0/0x160 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466ce7 RSP: 002b:00007ffcf7854838 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ce7 RDX: 00007ffcf7854909 RSI: 0000000000000002 RDI: 00007ffcf7854900 RBP: 00007ffcf7854900 R08: 00000000ffffffff R09: 00007ffcf78546d0 R10: 000000000314f8ab R11: 0000000000000246 R12: 00000000004ae4e4 R13: 00007ffcf78559b0 R14: 000000000314f810 R15: 0000000000000002 Showing all locks held in the system: 2 locks held by kworker/u4:0/8: 2 locks held by kworker/u4:2/37: #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2246 #1: ffffc90000e1fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2250 2 locks held by kworker/u4:4/311: #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2246 #1: ffffc9000111fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2250 2 locks held by kworker/u4:5/397: #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2246 #1: ffffc90001d0fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2250 2 locks held by kworker/u4:6/934: #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2246 #1: ffffc9000418fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2250 1 lock held by khungtaskd/1671: #0: ffffffff8a98ab40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c kernel/locking/lockdep.c:6327 2 locks held by syz-executor.2/8799: #0: ffff88803e7fc0e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365 #1: ffff888143d28708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:344 [inline] #1: ffff888143d28708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x171/0x8a0 fs/fs-writeback.c:2575 2 locks held by syz-executor.5/8801: #0: ffff8880118340e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365 #1: ffff888018192708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:344 [inline] #1: ffff888018192708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x171/0x8a0 fs/fs-writeback.c:2575 2 locks held by syz-executor.3/8802: #0: ffff88803d05a0e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365 #1: ffff888143d2e708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:344 [inline] #1: ffff888143d2e708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x171/0x8a0 fs/fs-writeback.c:2575 2 locks held by syz-executor.1/8806: #0: ffff8880239280e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365 #1: ffff88801806a708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:344 [inline] #1: ffff88801806a708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x171/0x8a0 fs/fs-writeback.c:2575 2 locks held by syz-executor.4/8807: #0: ffff88803c7220e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365 #1: ffff888018144708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:344 [inline] #1: ffff888018144708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x171/0x8a0 fs/fs-writeback.c:2575 2 locks held by syz-executor.0/8808: #0: ffff8880133f20e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 fs/super.c:365 #1: ffff888018014708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:344 [inline] #1: ffff888018014708 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x171/0x8a0 fs/fs-writeback.c:2575 2 locks held by kworker/u4:8/10301: #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888013803938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2246 #1: ffffc9000a537db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2250 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1671 Comm: khungtaskd Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x93/0xc2 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x2d/0xac lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0x9cf/0xc00 kernel/hung_task.c:294 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10316 Comm: kworker/u4:9 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_release kernel/locking/lockdep.c:5216 [inline] RIP: 0010:lock_release+0x2ab/0x720 kernel/locking/lockdep.c:5530 Code: 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e c2 03 00 00 66 83 6b 22 10 66 f7 43 22 f0 ff 0f 85 0c 01 00 00 4c 89 f2 44 8b 64 24 50 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 RSP: 0018:ffffc9000a4e7bc8 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff88801fd13f60 RCX: ffffc9000a4e7c18 RDX: ffff88801fd13f08 RSI: 0000000000000000 RDI: ffff88801fd13f82 RBP: 1ffff9200149cf7b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000003 R14: ffff88801fd13f08 R15: ffff88801fd13580 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77e4102010 CR3: 0000000024d1c000 CR4: 0000000000350ee0 Call Trace: rcu_lock_release include/linux/rcupdate.h:272 [inline] rcu_read_unlock include/linux/rcupdate.h:710 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x61b/0xcd0 net/batman-adv/network-coding.c:715 process_one_work+0x84c/0x13d0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294