./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4287397785 <...> Warning: Permanently added '10.128.1.92' (ED25519) to the list of known hosts. execve("./syz-executor4287397785", ["./syz-executor4287397785"], 0x7ffc268335c0 /* 10 vars */) = 0 brk(NULL) = 0x555555e7a000 brk(0x555555e7ad00) = 0x555555e7ad00 arch_prctl(ARCH_SET_FS, 0x555555e7a380) = 0 set_tid_address(0x555555e7a650) = 5056 set_robust_list(0x555555e7a660, 24) = 0 rseq(0x555555e7aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4287397785", 4096) = 28 getrandom("\xce\xb6\xd0\x5f\xcf\xec\x9b\x4a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555e7ad00 brk(0x555555e9bd00) = 0x555555e9bd00 brk(0x555555e9c000) = 0x555555e9c000 mprotect(0x7fc1e86af000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3 socketpair(AF_UNIX, SOCK_STREAM, 0, [4, 5]) = 0 ioctl(5, SIOCGIFINDEX, {ifr_name="lo", ifr_ifindex=1}) = 0 [ 61.962212][ T5056] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 61.970051][ T5056] #PF: supervisor instruction fetch in kernel mode [ 61.976551][ T5056] #PF: error_code(0x0010) - not-present page [ 61.982519][ T5056] PGD 65d08067 P4D 65d08067 PUD 2ccce067 PMD 0 [ 61.988763][ T5056] Oops: 0010 [#1] PREEMPT SMP KASAN [ 61.993940][ T5056] CPU: 1 PID: 5056 Comm: syz-executor428 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 62.003809][ T5056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 62.013855][ T5056] RIP: 0010:0x0 [ 62.017303][ T5056] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.024646][ T5056] RSP: 0018:ffffc90003bcf408 EFLAGS: 00010246 [ 62.030692][ T5056] RAX: dffffc0000000000 RBX: ffff888023910000 RCX: ffffffff889a5187 [ 62.038642][ T5056] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888023910000 [ 62.046593][ T5056] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.054551][ T5056] R10: 0000000000000001 R11: 000000001c21532c R12: ffff888013bc8000 [ 62.062500][ T5056] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.070448][ T5056] FS: 0000555555e7a380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 62.079357][ T5056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.085920][ T5056] CR2: ffffffffffffffd6 CR3: 00000000221f4000 CR4: 00000000003506f0 [ 62.093873][ T5056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.101824][ T5056] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.109778][ T5056] Call Trace: [ 62.113042][ T5056] [ 62.115954][ T5056] ? show_regs+0x8e/0xa0 [ 62.120215][ T5056] ? __die+0x2c/0x80 [ 62.124094][ T5056] ? page_fault_oops+0x397/0xab0 [ 62.129014][ T5056] ? dump_pagetable+0x530/0x530 [ 62.133847][ T5056] ? netem_change+0x1505/0x2520 [ 62.138702][ T5056] ? netem_dump+0x1260/0x1260 [ 62.143363][ T5056] ? do_user_addr_fault+0x562/0x1020 [ 62.148668][ T5056] ? rcu_is_watching+0x12/0xb0 [ 62.153420][ T5056] ? exc_page_fault+0x5c/0xc0 [ 62.158079][ T5056] ? asm_exc_page_fault+0x26/0x30 [ 62.163085][ T5056] ? qdisc_create+0xca7/0x1440 [ 62.167836][ T5056] qdisc_create+0x6c0/0x1440 [ 62.172412][ T5056] ? tc_get_qdisc+0xdf0/0xdf0 [ 62.177076][ T5056] ? __nla_parse+0x40/0x50 [ 62.181478][ T5056] tc_modify_qdisc+0x4d5/0x1c30 [ 62.186333][ T5056] ? qdisc_create+0x1440/0x1440 [ 62.191166][ T5056] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.197138][ T5056] ? bpf_lsm_capable+0x9/0x10 [ 62.201801][ T5056] ? security_capable+0x92/0xc0 [ 62.206642][ T5056] ? qdisc_create+0x1440/0x1440 [ 62.211476][ T5056] rtnetlink_rcv_msg+0x3c7/0xe00 [ 62.216408][ T5056] ? rtnl_fill_vf+0x490/0x490 [ 62.221070][ T5056] netlink_rcv_skb+0x16b/0x440 [ 62.225820][ T5056] ? rtnl_fill_vf+0x490/0x490 [ 62.230481][ T5056] ? netlink_ack+0x1380/0x1380 [ 62.235238][ T5056] ? lock_sync+0x190/0x190 [ 62.239637][ T5056] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 62.245952][ T5056] ? netlink_deliver_tap+0x1a0/0xd00 [ 62.251221][ T5056] ? _copy_from_iter+0x2c1/0x10f0 [ 62.256230][ T5056] netlink_unicast+0x53b/0x810 [ 62.260981][ T5056] ? netlink_attachskb+0x870/0x870 [ 62.266077][ T5056] ? __phys_addr_symbol+0x30/0x70 [ 62.271090][ T5056] ? __check_object_size+0x322/0x730 [ 62.276366][ T5056] netlink_sendmsg+0x8b4/0xd70 [ 62.281116][ T5056] ? netlink_unicast+0x810/0x810 [ 62.286038][ T5056] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 62.291308][ T5056] ? netlink_unicast+0x810/0x810 [ 62.296226][ T5056] __sock_sendmsg+0xd5/0x180 [ 62.300804][ T5056] ____sys_sendmsg+0x6ac/0x940 [ 62.305555][ T5056] ? copy_msghdr_from_user+0x10b/0x160 [ 62.310994][ T5056] ? kernel_sendmsg+0x50/0x50 [ 62.315660][ T5056] ? finish_task_switch.isra.0+0x217/0xcb0 [ 62.321451][ T5056] ? __switch_to+0x749/0x1370 [ 62.326135][ T5056] ___sys_sendmsg+0x135/0x1d0 [ 62.330794][ T5056] ? do_recvmmsg+0x740/0x740 [ 62.335365][ T5056] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.341337][ T5056] ? lock_sync+0x190/0x190 [ 62.345733][ T5056] ? ptrace_stop.part.0+0x44a/0x930 [ 62.350920][ T5056] ? __fget_light+0x172/0x200 [ 62.355581][ T5056] __sys_sendmsg+0x117/0x1e0 [ 62.360152][ T5056] ? __sys_sendmsg_sock+0x30/0x30 [ 62.365155][ T5056] ? ptrace_notify+0xf1/0x130 [ 62.369816][ T5056] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.374996][ T5056] ? ptrace_notify+0xf1/0x130 [ 62.379658][ T5056] do_syscall_64+0xd0/0x250 [ 62.384149][ T5056] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.390026][ T5056] RIP: 0033:0x7fc1e863c5a9 [ 62.394422][ T5056] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 62.414012][ T5056] RSP: 002b:00007ffcaa8d97c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.422406][ T5056] RAX: ffffffffffffffda RBX: 00007ffcaa8d9998 RCX: 00007fc1e863c5a9 [ 62.430355][ T5056] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 62.438305][ T5056] RBP: 00007fc1e86af610 R08: 000000000000000a R09: 00007ffcaa8d9998 [ 62.446254][ T5056] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 62.454203][ T5056] R13: 00007ffcaa8d9988 R14: 0000000000000001 R15: 0000000000000001 [ 62.462158][ T5056] [ 62.465170][ T5056] Modules linked in: [ 62.469053][ T5056] CR2: 0000000000000000 [ 62.473186][ T5056] ---[ end trace 0000000000000000 ]--- [ 62.478617][ T5056] RIP: 0010:0x0 [ 62.482062][ T5056] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.489403][ T5056] RSP: 0018:ffffc90003bcf408 EFLAGS: 00010246 [ 62.495461][ T5056] RAX: dffffc0000000000 RBX: ffff888023910000 RCX: ffffffff889a5187 [ 62.503411][ T5056] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888023910000 [ 62.511362][ T5056] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.519311][ T5056] R10: 0000000000000001 R11: 000000001c21532c R12: ffff888013bc8000 [ 62.527262][ T5056] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.535214][ T5056] FS: 0000555555e7a380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 62.544124][ T5056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.550689][ T5056] CR2: ffffffffffffffd6 CR3: 00000000221f4000 CR4: 00000000003506f0 [ 62.558642][ T5056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.566595][ T5056] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.574546][ T5056] Kernel panic - not syncing: Fatal exception [ 62.580803][ T5056] Kernel Offset: disabled [ 62.585124][ T5056] Rebooting in 86400 seconds..