INFO: task syz-executor.1:8531 blocked for more than 143 seconds. Not tainted 5.3.0-rc7+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29192 8531 9300 0x00004004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x877/0xc50 kernel/sched/core.c:3880 schedule+0x131/0x1e0 kernel/sched/core.c:3947 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4006 __mutex_lock_common+0x1401/0x2820 kernel/locking/mutex.c:1007 __mutex_lock kernel/locking/mutex.c:1077 [inline] mutex_lock_nested+0x1b/0x30 kernel/locking/mutex.c:1092 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0xcc/0x12b0 net/netlink/genetlink.c:652 netlink_rcv_skb+0x19e/0x3d0 net/netlink/af_netlink.c:2477 genl_rcv+0x28/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x787/0x900 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x993/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg net/socket.c:657 [inline] ___sys_sendmsg+0x60d/0x910 net/socket.c:2311 __sys_sendmsg net/socket.c:2356 [inline] __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x17c/0x200 net/socket.c:2363 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4136f1 Code: 0f 85 6d fc ff ff 83 7c 24 0c 00 0f 84 e7 fc ff ff c7 05 9e 9f 24 00 01 00 00 00 e9 d8 fc ff ff 90 90 90 90 90 90 90 90 90 c7 <07> 01 00 00 00 31 c0 c3 0f 1f 80 00 00 00 00 c7 07 00 00 00 00 31 RSP: 002b:00007f93a2a7a9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f93a2a7aa58 RCX: 00000000004136f1 RDX: 0000000000000000 RSI: 00007f93a2a7aa00 RDI: 0000000000000005 RBP: 0000000000000005 R08: 000000000000000b R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f93a2a7aa40 R13: 00000000004d08a8 R14: 00000000004df7b0 R15: 00000000ffffffff INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 1056 Comm: khungtaskd Not tainted 5.3.0-rc7+ #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+0x1d8/0x2f8 lib/dump_stack.c:113 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xbb9/0xbd0 kernel/hung_task.c:289 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8414 Comm: syz-executor.5 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp2+0x80/0x90 kernel/kcov.c:184 Code: 34 8d 01 00 00 00 49 c7 04 f2 03 00 00 00 49 89 4c f2 08 48 c1 e0 03 48 83 c8 18 49 89 14 02 4d 89 44 f2 18 49 ff c1 4d 89 0a 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 4c 8b 04 24 65 48 RSP: 0018:ffff88805615f208 EFLAGS: 00000297 RAX: ffff888098f30300 RBX: 000000000000000c RCX: 0000000000000002 RDX: 0000000000000058 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff88805615f2c8 R08: ffffffff836aa93c R09: ffff88809bc24d00 R10: ffffed10137849ab R11: 0000000000000000 R12: 1ffff1101425b3d2 R13: ffff8880a12d9e94 R14: 0000000000000002 R15: ffff8880a12d9e96 FS: 00007fc66a22f700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000983c4000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __nla_parse+0x41/0x50 lib/nlattr.c:478 __nlmsg_parse include/net/netlink.h:666 [inline] nlmsg_parse_deprecated include/net/netlink.h:706 [inline] tipc_nlmsg_parse+0xb9/0xe0 net/tipc/netlink.c:279 tipc_nl_publ_dump+0x173/0xd60 net/tipc/socket.c:3594 __tipc_nl_compat_dumpit+0x22c/0x7f0 net/tipc/netlink_compat.c:207 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:1002 [inline] tipc_nl_compat_sk_dump+0x6c0/0x890 net/tipc/netlink_compat.c:1054 __tipc_nl_compat_dumpit+0x33c/0x7f0 net/tipc/netlink_compat.c:216 tipc_nl_compat_dumpit+0x353/0x4f0 net/tipc/netlink_compat.c:288 tipc_nl_compat_handle net/tipc/netlink_compat.c:1195 [inline] tipc_nl_compat_recv+0x1011/0x2200 net/tipc/netlink_compat.c:1291 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xb52/0x12b0 net/netlink/genetlink.c:654 netlink_rcv_skb+0x19e/0x3d0 net/netlink/af_netlink.c:2477 genl_rcv+0x28/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x787/0x900 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x993/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg net/socket.c:657 [inline] ___sys_sendmsg+0x60d/0x910 net/socket.c:2311 __sys_sendmsg net/socket.c:2356 [inline] __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x17c/0x200 net/socket.c:2363 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc66a22ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: ffffffff00000000 RSI: 0000000020000500 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc66a22f6d4 R13: 00000000004cea80 R14: 00000000004dccf0 R15: 00000000ffffffff