netlink: 2383148 bytes leftover after parsing attributes in process `syz-executor2'. INFO: task syz-executor4:28120 blocked for more than 143 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D27640 28120 6410 0x00004004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:982 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x5e1/0x10f0 net/netlink/genetlink.c:735 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fae4512b9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fae4512ba00 RDI: 0000000000000007 RBP: 0000000000000007 R08: 00007fae4512b9d0 R09: 000000000072bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fae4512ba40 R13: 00000000004cc538 R14: 00000000004d9a08 R15: 00000000ffffffff INFO: task syz-executor5:28131 blocked for more than 143 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D26440 28131 6413 0x00000004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fda855a19c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fda855a1a00 RDI: 0000000000000008 RBP: 0000000000000008 R08: 00007fda855a19d0 R09: 000000000072bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fda855a1a40 R13: 00000000004cc538 R14: 00000000004d9a08 R15: 00000000ffffffff INFO: task syz-executor5:28144 blocked for more than 143 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D28544 28144 6413 0x00000004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fda855809c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fda85580a58 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fda85580a00 RDI: 0000000000000007 RBP: 0000000000000007 R08: 000000000000000b R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fda85580a40 R13: 00000000004cc510 R14: 00000000004d99f0 R15: 00000000ffffffff INFO: task syz-executor3:28145 blocked for more than 144 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D27648 28145 6412 0x00004004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:982 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x5e1/0x10f0 net/netlink/genetlink.c:735 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fcf58fc59c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fcf58fc5a00 RDI: 0000000000000005 RBP: 0000000000000005 R08: 00007fcf58fc59d0 R09: 000000000072bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fcf58fc5a40 R13: 00000000004cc538 R14: 00000000004d9a08 R15: 00000000ffffffff INFO: task syz-executor3:28152 blocked for more than 144 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D28544 28152 6412 0x00004004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fcf58fa49c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fcf58fa4a58 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fcf58fa4a00 RDI: 0000000000000006 RBP: 0000000000000006 R08: 000000000000000b R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000293 R12: 00007fcf58fa4a40 R13: 00000000004cc510 R14: 00000000004d99f0 R15: 00000000ffffffff INFO: task syz-executor3:28156 blocked for more than 144 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D27744 28156 6412 0x00004004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fcf58f839c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fcf58f83a00 RDI: 0000000000000009 RBP: 0000000000000009 R08: 00007fcf58f839d0 R09: 000000000072c040 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fcf58f83a40 R13: 00000000004cc538 R14: 00000000004d9a08 R15: 00000000ffffffff INFO: task syz-executor3:28160 blocked for more than 145 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D28544 28160 6412 0x00004004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007fcf58f629c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fcf58f62a58 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007fcf58f62a00 RDI: 000000000000000a RBP: 000000000000000a R08: 000000000000000b R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000293 R12: 00007fcf58f62a40 R13: 00000000004cc510 R14: 00000000004d99f0 R15: 00000000ffffffff INFO: task syz-executor1:28147 blocked for more than 145 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D28544 28147 6415 0x00004004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007f4c0aac49c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007f4c0aac4a00 RDI: 0000000000000005 RBP: 0000000000000005 R08: 00007f4c0aac49d0 R09: 000000000072bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f4c0aac4a40 R13: 00000000004cc538 R14: 00000000004d9a08 R15: 00000000ffffffff INFO: task syz-executor1:28153 blocked for more than 145 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D28544 28153 6415 0x00000004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007f4c0aaa39c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4c0aaa3a58 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007f4c0aaa3a00 RDI: 0000000000000006 RBP: 0000000000000006 R08: 000000000000000b R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000293 R12: 00007f4c0aaa3a40 R13: 00000000004cc510 R14: 00000000004d99f0 R15: 00000000ffffffff INFO: task syz-executor1:28157 blocked for more than 146 seconds. Not tainted 5.6.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D28376 28157 6415 0x00000004 Call Trace: context_switch kernel/sched/core.c:3380 [inline] __schedule+0x856/0x1910 kernel/sched/core.c:4080 schedule+0xc3/0x2b0 kernel/sched/core.c:4154 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4213 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8b5/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411231 Code: 01 4c 89 54 24 28 e9 6f fa ff ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 b3 fe ff ff 49 8b 7c 24 70 be <20> 13 41 00 ff 15 dd 83 24 00 85 c0 0f 85 9b fe ff ff 49 8b 7c 24 RSP: 002b:00007f4c0aa829c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000411231 RDX: 0000000000000000 RSI: 00007f4c0aa82a00 RDI: 0000000000000009 RBP: 0000000000000009 R08: 00007f4c0aa829d0 R09: 000000000072c040 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f4c0aa82a40 R13: 00000000004cc538 R14: 00000000004d9a08 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/572: #0: ffffffff885a4a80 (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x275 kernel/locking/lockdep.c:5333 1 lock held by rsyslogd/6166: #0: ffff8881cf94b3e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xa3/0xc0 fs/file.c:826 2 locks held by getty/6288: #0: ffff8881b54eb090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004d0d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/6289: #0: ffff8881ce4fc090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004d112e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/6290: #0: ffff8881cef30090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004cf12e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/6291: #0: ffff8881bf0b2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004d152e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/6292: #0: ffff8881d16d1090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004d052e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/6293: #0: ffff8881c49a6090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004ce52e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/6294: #0: ffff8881c4a5f090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90004cdd2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by syz-executor4/28120: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: ctrl_getfamily+0x2b2/0x400 net/netlink/genetlink.c:981 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:982 2 locks held by syz-executor4/28136: 2 locks held by syz-executor5/28131: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor5/28144: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor3/28145: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: ctrl_getfamily+0x2b2/0x400 net/netlink/genetlink.c:981 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:982 2 locks held by syz-executor3/28152: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor3/28156: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor3/28160: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor1/28147: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor1/28153: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor1/28157: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor1/28162: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor0/28149: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor0/28154: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor0/28158: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor0/28164: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor2/28151: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor2/28155: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 2 locks held by syz-executor2/28159: #0: ffffffff88fcf4a8 (cb_lock){++++}, at: genl_rcv+0x14/0x40 net/netlink/genetlink.c:745 #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff88fcf560 (genl_mutex){+.+.}, at: genl_rcv_msg+0x66e/0x10f0 net/netlink/genetlink.c:733 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 572 Comm: khungtaskd Not tainted 5.6.0-rc6-syzkaller #0 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+0x12d/0x187 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.7+0x4b/0x84 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x18b/0x1b7 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+0x611/0xc50 kernel/hung_task.c:289 kthread+0x334/0x3f0 kernel/kthread.c:255 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 28136 Comm: syz-executor4 Not tainted 5.6.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__rcu_read_unlock+0x94/0x700 kernel/rcu/tree_plugin.h:403 Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 23 01 00 00 83 ab 78 03 00 00 01 65 48 8b 1c 25 c0 1e 02 00 <48> 8d bb 78 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff8881bfe66c30 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8881be2ee400 RCX: 1ffff11037c5dcef RDX: 1ffff11037c5dcef RSI: 0000000000000000 RDI: ffff8881be2ee778 RBP: ffff8881bfe66c68 R08: ffffed103b626fec R09: ffffed103b626fec R10: ffffed103b626feb R11: ffff8881db137f5b R12: ffff8881d6ea8000 R13: ffff8881bfe66d60 R14: 0000000000000001 R15: ffff8881be2ee400 FS: 00007fae4510b700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001cc824000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:654 [inline] tipc_sk_lookup+0x4bd/0x8c0 net/tipc/socket.c:2909 tipc_nl_publ_dump+0x2df/0xca0 net/tipc/socket.c:3716 __tipc_nl_compat_dumpit.isra.11+0x327/0xc10 net/tipc/netlink_compat.c:224 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:1022 [inline] tipc_nl_compat_sk_dump+0x4ed/0x990 net/tipc/netlink_compat.c:1074 __tipc_nl_compat_dumpit.isra.11+0x44c/0xc10 net/tipc/netlink_compat.c:235 tipc_nl_compat_dumpit+0x1e6/0x4c0 net/tipc/netlink_compat.c:308 tipc_nl_compat_handle net/tipc/netlink_compat.c:1248 [inline] tipc_nl_compat_recv+0x45a/0xa70 net/tipc/netlink_compat.c:1311 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x5e1/0x10f0 net/netlink/genetlink.c:735 netlink_rcv_skb+0x13f/0x380 net/netlink/af_netlink.c:2478 genl_rcv+0x23/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x479/0x6c0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x7ab/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xe6/0x110 net/socket.c:672 ____sys_sendmsg+0x603/0x980 net/socket.c:2345 ___sys_sendmsg+0xe4/0x160 net/socket.c:2399 __sys_sendmsg+0xd9/0x180 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2439 do_syscall_64+0xd0/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4577a9 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:00007fae4510ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004577a9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000005 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fae4510b6d4 R13: 00000000004c4211 R14: 00000000004d70f8 R15: 00000000ffffffff