./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3223863449 <...> Warning: Permanently added '10.128.1.146' (ED25519) to the list of known hosts. execve("./syz-executor3223863449", ["./syz-executor3223863449"], 0x7ffc8dfb4280 /* 10 vars */) = 0 brk(NULL) = 0x555557026000 brk(0x555557026d00) = 0x555557026d00 arch_prctl(ARCH_SET_FS, 0x555557026380) = 0 set_tid_address(0x555557026650) = 5065 set_robust_list(0x555557026660, 24) = 0 rseq(0x555557026ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3223863449", 4096) = 28 getrandom("\x60\xc0\x24\x94\x1f\x63\x9b\x1a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557026d00 brk(0x555557047d00) = 0x555557047d00 brk(0x555557048000) = 0x555557048000 mprotect(0x7f40acf1e000, 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 [ 61.955579][ T5065] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 61.963478][ T5065] #PF: supervisor instruction fetch in kernel mode [ 61.969982][ T5065] #PF: error_code(0x0010) - not-present page [ 61.975958][ T5065] PGD 2281a067 P4D 2281a067 PUD 1c837067 PMD 0 [ 61.982195][ T5065] Oops: 0010 [#1] PREEMPT SMP KASAN [ 61.987381][ T5065] CPU: 1 PID: 5065 Comm: syz-executor322 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 61.997275][ T5065] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 62.007315][ T5065] RIP: 0010:0x0 [ 62.010782][ T5065] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.018126][ T5065] RSP: 0018:ffffc90003c1f408 EFLAGS: 00010246 [ 62.024178][ T5065] RAX: dffffc0000000000 RBX: ffff88801a2ae000 RCX: ffffffff889a5187 [ 62.032133][ T5065] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88801a2ae000 [ 62.040091][ T5065] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.048044][ T5065] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b50000 [ 62.056000][ T5065] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.063967][ T5065] FS: 0000555557026380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 62.072900][ T5065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.079470][ T5065] CR2: ffffffffffffffd6 CR3: 0000000021e0d000 CR4: 00000000003506f0 [ 62.087429][ T5065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.095471][ T5065] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.103529][ T5065] Call Trace: [ 62.106791][ T5065] [ 62.109709][ T5065] ? show_regs+0x8e/0xa0 [ 62.113963][ T5065] ? __die+0x2c/0x80 [ 62.117848][ T5065] ? page_fault_oops+0x397/0xab0 [ 62.122777][ T5065] ? dump_pagetable+0x530/0x530 [ 62.127617][ T5065] ? netem_change+0x1505/0x2520 [ 62.132464][ T5065] ? netem_dump+0x1260/0x1260 [ 62.137148][ T5065] ? do_user_addr_fault+0x562/0x1020 [ 62.142473][ T5065] ? rcu_is_watching+0x12/0xb0 [ 62.147586][ T5065] ? exc_page_fault+0x5c/0xc0 [ 62.152248][ T5065] ? asm_exc_page_fault+0x26/0x30 [ 62.157261][ T5065] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.163358][ T5065] ? qdisc_create+0xca7/0x1440 [ 62.168122][ T5065] qdisc_create+0x6c0/0x1440 [ 62.172705][ T5065] ? tc_get_qdisc+0xdf0/0xdf0 [ 62.177374][ T5065] ? __nla_parse+0x40/0x50 [ 62.181781][ T5065] tc_modify_qdisc+0x4d5/0x1c30 [ 62.186640][ T5065] ? qdisc_create+0x1440/0x1440 [ 62.191498][ T5065] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.197573][ T5065] ? bpf_lsm_capable+0x9/0x10 [ 62.202258][ T5065] ? security_capable+0x92/0xc0 [ 62.207115][ T5065] ? qdisc_create+0x1440/0x1440 [ 62.211963][ T5065] rtnetlink_rcv_msg+0x3c7/0xe00 [ 62.216896][ T5065] ? rtnl_fill_vf+0x490/0x490 [ 62.221651][ T5065] netlink_rcv_skb+0x16b/0x440 [ 62.226409][ T5065] ? rtnl_fill_vf+0x490/0x490 [ 62.231068][ T5065] ? netlink_ack+0x1380/0x1380 [ 62.235842][ T5065] ? lock_sync+0x190/0x190 [ 62.240243][ T5065] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 62.246561][ T5065] ? netlink_deliver_tap+0x1a0/0xd00 [ 62.251832][ T5065] ? _copy_from_iter+0x2c1/0x10f0 [ 62.256885][ T5065] netlink_unicast+0x53b/0x810 [ 62.261644][ T5065] ? netlink_attachskb+0x870/0x870 [ 62.266745][ T5065] ? __phys_addr_symbol+0x30/0x70 [ 62.271758][ T5065] ? __check_object_size+0x322/0x730 [ 62.277043][ T5065] netlink_sendmsg+0x8b4/0xd70 [ 62.281833][ T5065] ? netlink_unicast+0x810/0x810 [ 62.286760][ T5065] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 62.292059][ T5065] ? netlink_unicast+0x810/0x810 [ 62.296987][ T5065] __sock_sendmsg+0xd5/0x180 [ 62.301594][ T5065] ____sys_sendmsg+0x6ac/0x940 [ 62.306353][ T5065] ? copy_msghdr_from_user+0x10b/0x160 [ 62.311885][ T5065] ? kernel_sendmsg+0x50/0x50 [ 62.316555][ T5065] ? finish_task_switch.isra.0+0x217/0xcb0 [ 62.322415][ T5065] ? __switch_to+0x749/0x1370 [ 62.327109][ T5065] ___sys_sendmsg+0x135/0x1d0 [ 62.331807][ T5065] ? do_recvmmsg+0x740/0x740 [ 62.336527][ T5065] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.342543][ T5065] ? lock_sync+0x190/0x190 [ 62.346993][ T5065] ? ptrace_stop.part.0+0x44a/0x930 [ 62.352221][ T5065] ? __fget_light+0x172/0x200 [ 62.356899][ T5065] __sys_sendmsg+0x117/0x1e0 [ 62.361562][ T5065] ? __sys_sendmsg_sock+0x30/0x30 [ 62.366605][ T5065] ? ptrace_notify+0xf1/0x130 [ 62.371286][ T5065] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.376493][ T5065] ? ptrace_notify+0xf1/0x130 [ 62.381194][ T5065] do_syscall_64+0xd0/0x250 [ 62.385729][ T5065] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.391610][ T5065] RIP: 0033:0x7f40aceab5a9 [ 62.396016][ T5065] 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 [ 62.415754][ T5065] RSP: 002b:00007ffc89c5e898 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.424172][ T5065] RAX: ffffffffffffffda RBX: 00007ffc89c5ea68 RCX: 00007f40aceab5a9 [ 62.432493][ T5065] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 62.440452][ T5065] RBP: 00007f40acf1e610 R08: 000000000000000a R09: 00007ffc89c5ea68 [ 62.448418][ T5065] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 62.456385][ T5065] R13: 00007ffc89c5ea58 R14: 0000000000000001 R15: 0000000000000001 [ 62.464364][ T5065] [ 62.467366][ T5065] Modules linked in: [ 62.471364][ T5065] CR2: 0000000000000000 [ 62.475513][ T5065] ---[ end trace 0000000000000000 ]--- [ 62.480998][ T5065] RIP: 0010:0x0 [ 62.484474][ T5065] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.491825][ T5065] RSP: 0018:ffffc90003c1f408 EFLAGS: 00010246 [ 62.497961][ T5065] RAX: dffffc0000000000 RBX: ffff88801a2ae000 RCX: ffffffff889a5187 [ 62.505922][ T5065] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88801a2ae000 [ 62.513879][ T5065] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.521833][ T5065] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b50000 [ 62.529788][ T5065] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.537763][ T5065] FS: 0000555557026380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 62.546682][ T5065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.553252][ T5065] CR2: ffffffffffffffd6 CR3: 0000000021e0d000 CR4: 00000000003506f0 [ 62.561226][ T5065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.569322][ T5065] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.577318][ T5065] Kernel panic - not syncing: Fatal exception [ 62.583643][ T5065] Kernel Offset: disabled [ 62.587961][ T5065] Rebooting in 86400 seconds..