IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 INFO: task syz-executor1:7874 blocked for more than 143 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D28160 7874 6182 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 b1 00 00 00 48 83 ec 30 48 89 6c 24 28 48 8d 6c 24 28 <48> 8b 44 24 38 84 00 48 8b 4c 24 40 48 2b 0d 54 09 c4 00 48 c1 e9 RSP: 002b:00007fff22997490 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730228 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff229973c0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000005 R15: 0000000000000001 INFO: task syz-executor1:7899 blocked for more than 143 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D29432 7899 6182 0x00004006 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 get_signal+0x207c/0x2500 kernel/signal.c:2523 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x251/0x2d0 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4576b9 Code: cc 48 8d 05 99 c2 ff ff ff e0 cc cc cc cc cc cc cc 8b 7c 24 08 b8 e7 00 00 00 0f 05 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 <8b> 54 24 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 76 05 b8 ff ff RSP: 002b:00007fe59d2f0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00000000004576b9 RDX: 0000000000000002 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe59d2f16d4 R13: 00000000004c339b R14: 00000000004d5280 R15: 00000000ffffffff INFO: task syz-executor4:7875 blocked for more than 143 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D28160 7875 6184 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 b1 00 00 00 48 83 ec 30 48 89 6c 24 28 48 8d 6c 24 28 <48> 8b 44 24 38 84 00 48 8b 4c 24 40 48 2b 0d 54 09 c4 00 48 c1 e9 RSP: 002b:00007fff57494420 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730228 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff57494350 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000006 R15: 0000000000000004 INFO: task syz-executor4:7891 blocked for more than 144 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D29880 7891 6184 0x00004006 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 get_signal+0x207c/0x2500 kernel/signal.c:2523 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x251/0x2d0 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4576b9 Code: cc 48 8d 05 99 c2 ff ff ff e0 cc cc cc cc cc cc cc 8b 7c 24 08 b8 e7 00 00 00 0f 05 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 <8b> 54 24 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 76 05 b8 ff ff RSP: 002b:00007fa3e97ecc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00000000004576b9 RDX: 0000000000000002 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa3e97ed6d4 R13: 00000000004c339b R14: 00000000004d5280 R15: 00000000ffffffff INFO: task syz-executor5:7877 blocked for more than 144 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D28160 7877 6185 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 b1 00 00 00 48 83 ec 30 48 89 6c 24 28 48 8d 6c 24 28 <48> 8b 44 24 38 84 00 48 8b 4c 24 40 48 2b 0d 54 09 c4 00 48 c1 e9 RSP: 002b:00007fffa169e040 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730228 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffa169df70 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000007 R15: 0000000000000005 INFO: task syz-executor5:7893 blocked for more than 144 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D29880 7893 6185 0x00004006 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 get_signal+0x207c/0x2500 kernel/signal.c:2523 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x251/0x2d0 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4576b9 Code: cc 48 8d 05 99 c2 ff ff ff e0 cc cc cc cc cc cc cc 8b 7c 24 08 b8 e7 00 00 00 0f 05 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 <8b> 54 24 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 76 05 b8 ff ff RSP: 002b:00007f9c45714c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00000000004576b9 RDX: 0000000000000002 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9c457156d4 R13: 00000000004c339b R14: 00000000004d5280 R15: 00000000ffffffff INFO: task syz-executor3:7878 blocked for more than 144 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D28160 7878 6180 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136 kthread_stop+0x131/0x720 kernel/kthread.c:559 vivid_stop_generating_vid_cap+0x1ff/0x783 drivers/media/platform/vivid/vivid-kthread-cap.c:962 vid_cap_stop_streaming+0x8a/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:257 __vb2_queue_cancel+0xc6/0xab0 drivers/media/common/videobuf2/videobuf2-core.c:1874 vb2_core_streamoff+0x60/0x150 drivers/media/common/videobuf2/videobuf2-core.c:2038 __vb2_cleanup_fileio+0x78/0x170 drivers/media/common/videobuf2/videobuf2-core.c:2575 vb2_core_queue_release+0x20/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2302 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:868 [inline] _vb2_fop_release+0x1cf/0x2a0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1039 vb2_fop_release+0x75/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1053 vivid_fop_release+0x18e/0x450 drivers/media/platform/vivid/vivid-core.c:475 v4l2_release+0x224/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:452 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 b1 00 00 00 48 83 ec 30 48 89 6c 24 28 48 8d 6c 24 28 <48> 8b 44 24 38 84 00 48 8b 4c 24 40 48 2b 0d 54 09 c4 00 48 c1 e9 RSP: 002b:00007ffd11e15d60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411021 RDX: 0000000000000001 RSI: 0000000000730228 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffd11e15c90 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000005 R15: 0000000000000003 INFO: task syz-executor0:7880 blocked for more than 145 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D28160 7880 6177 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 b1 00 00 00 48 83 ec 30 48 89 6c 24 28 48 8d 6c 24 28 <48> 8b 44 24 38 84 00 48 8b 4c 24 40 48 2b 0d 54 09 c4 00 48 c1 e9 RSP: 002b:00007fff5e50b190 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730228 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff5e50b0c0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000005 R15: 0000000000000000 INFO: task syz-executor0:7882 blocked for more than 145 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D28200 7882 6177 0x00004004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 vb2_ops_wait_finish+0x33/0x40 drivers/media/common/videobuf2/videobuf2-v4l2.c:1156 __vb2_wait_for_done_vb drivers/media/common/videobuf2/videobuf2-core.c:1725 [inline] __vb2_get_done_vb drivers/media/common/videobuf2/videobuf2-core.c:1749 [inline] vb2_core_dqbuf+0x4e4/0x1430 drivers/media/common/videobuf2/videobuf2-core.c:1808 __vb2_perform_fileio+0x863/0x1170 drivers/media/common/videobuf2/videobuf2-core.c:2643 vb2_read+0x3b/0x50 drivers/media/common/videobuf2/videobuf2-core.c:2758 vb2_fop_read+0x212/0x410 drivers/media/common/videobuf2/videobuf2-v4l2.c:1094 v4l2_read+0x21f/0x2a0 drivers/media/v4l2-core/v4l2-dev.c:313 do_loop_readv_writev fs/read_write.c:714 [inline] do_loop_readv_writev fs/read_write.c:701 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:935 vfs_readv+0xf0/0x160 fs/read_write.c:997 do_readv+0x15b/0x330 fs/read_write.c:1034 __do_sys_readv fs/read_write.c:1125 [inline] __se_sys_readv fs/read_write.c:1122 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1122 do_syscall_64+0x103/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4576b9 Code: cc 48 8d 05 99 c2 ff ff ff e0 cc cc cc cc cc cc cc 8b 7c 24 08 b8 e7 00 00 00 0f 05 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 <8b> 54 24 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 76 05 b8 ff ff RSP: 002b:00007f4284fdec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004576b9 RDX: 0000000000000002 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4284fdf6d4 R13: 00000000004c339b R14: 00000000004d5280 R15: 00000000ffffffff INFO: task syz-executor2:7885 blocked for more than 145 seconds. Not tainted 5.3.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D28160 7885 6176 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x75b/0x15a0 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 __fput+0x302/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5af/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: Bad RIP value. RSP: 002b:00007fffe519d0c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730228 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffe519cff0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000000000000000a R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/1026: #0: 0000000038ee497b (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5256 1 lock held by rsyslogd/5935: 2 locks held by getty/6025: #0: 000000000a03b4a1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000008c19fd9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/6026: #0: 000000005214275e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000009f561de3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/6027: #0: 00000000d3413bae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000009ae3db02 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/6028: #0: 0000000031f1ef88 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000631bcde2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/6029: #0: 00000000469b470d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000fe5ea282 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/6030: #0: 00000000fe390498 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000c244ffae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/6031: #0: 0000000047c2756e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000d159611a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor1/7874: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor1/7899: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor4/7875: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor4/7891: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor5/7877: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor5/7893: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 2 locks held by syz-executor3/7878: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 #1: 00000000259f26b6 (&dev->mutex#3){+.+.}, at: _vb2_fop_release+0x3f/0x2a0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1037 1 lock held by syz-executor0/7880: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor0/7882: #0: 00000000259f26b6 (&dev->mutex#3){+.+.}, at: vb2_ops_wait_finish+0x33/0x40 drivers/media/common/videobuf2/videobuf2-v4l2.c:1156 1 lock held by vivid-000-vid-c/7883: #0: 00000000259f26b6 (&dev->mutex#3){+.+.}, at: vivid_thread_vid_cap+0x4af/0x2bf0 drivers/media/platform/vivid/vivid-kthread-cap.c:798 1 lock held by syz-executor2/7885: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 1 lock held by syz-executor2/7897: #0: 00000000cae4e074 (&mdev->req_queue_mutex){+.+.}, at: v4l2_release+0x1d7/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:451 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1026 Comm: khungtaskd Not tainted 5.3.0-rc4+ #1 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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+0x9d0/0xef0 kernel/hung_task.c:289 kthread+0x364/0x430 kernel/kthread.c:255 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 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60