./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor773981673 <...> Warning: Permanently added '10.128.1.43' (ED25519) to the list of known hosts. execve("./syz-executor773981673", ["./syz-executor773981673"], 0x7fff1eba73e0 /* 10 vars */) = 0 brk(NULL) = 0x555556322000 brk(0x555556322d00) = 0x555556322d00 arch_prctl(ARCH_SET_FS, 0x555556322380) = 0 set_tid_address(0x555556322650) = 5058 set_robust_list(0x555556322660, 24) = 0 rseq(0x555556322ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor773981673", 4096) = 27 getrandom("\xa5\x50\x66\xfb\x16\x06\x71\x6d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556322d00 brk(0x555556343d00) = 0x555556343d00 brk(0x555556344000) = 0x555556344000 mprotect(0x7fb5c4e91000, 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 [ 62.891013][ T5058] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 62.898868][ T5058] #PF: supervisor instruction fetch in kernel mode [ 62.905370][ T5058] #PF: error_code(0x0010) - not-present page [ 62.911338][ T5058] PGD 22a75067 P4D 22a75067 PUD 2eaf8067 PMD 0 [ 62.917601][ T5058] Oops: 0010 [#1] PREEMPT SMP KASAN [ 62.922790][ T5058] CPU: 1 PID: 5058 Comm: syz-executor773 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 62.932673][ T5058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 62.942730][ T5058] RIP: 0010:0x0 [ 62.946189][ T5058] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.953547][ T5058] RSP: 0018:ffffc90003a1f408 EFLAGS: 00010246 [ 62.959609][ T5058] RAX: dffffc0000000000 RBX: ffff888070908000 RCX: ffffffff889a5187 [ 62.967661][ T5058] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888070908000 [ 62.975626][ T5058] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.983591][ T5058] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff888013b90000 [ 62.991643][ T5058] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.999705][ T5058] FS: 0000555556322380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 63.008665][ T5058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.015249][ T5058] CR2: ffffffffffffffd6 CR3: 000000001a2fd000 CR4: 00000000003506f0 [ 63.023391][ T5058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.031456][ T5058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.039434][ T5058] Call Trace: [ 63.042713][ T5058] [ 63.045637][ T5058] ? show_regs+0x8e/0xa0 [ 63.049903][ T5058] ? __die+0x2c/0x80 [ 63.053805][ T5058] ? page_fault_oops+0x397/0xab0 [ 63.058741][ T5058] ? dump_pagetable+0x530/0x530 [ 63.063591][ T5058] ? netem_change+0x1505/0x2520 [ 63.068455][ T5058] ? netem_dump+0x1260/0x1260 [ 63.073125][ T5058] ? do_user_addr_fault+0x562/0x1020 [ 63.078752][ T5058] ? rcu_is_watching+0x12/0xb0 [ 63.083543][ T5058] ? exc_page_fault+0x5c/0xc0 [ 63.088386][ T5058] ? asm_exc_page_fault+0x26/0x30 [ 63.093408][ T5058] ? kasan_save_stack+0x33/0x50 [ 63.098251][ T5058] ? qdisc_create+0xca7/0x1440 [ 63.103018][ T5058] qdisc_create+0x6c0/0x1440 [ 63.107612][ T5058] ? tc_get_qdisc+0xdf0/0xdf0 [ 63.112374][ T5058] ? __nla_parse+0x40/0x50 [ 63.116791][ T5058] tc_modify_qdisc+0x4d5/0x1c30 [ 63.121741][ T5058] ? qdisc_create+0x1440/0x1440 [ 63.126591][ T5058] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 63.132581][ T5058] ? bpf_lsm_capable+0x9/0x10 [ 63.137252][ T5058] ? security_capable+0x92/0xc0 [ 63.142105][ T5058] ? qdisc_create+0x1440/0x1440 [ 63.147040][ T5058] rtnetlink_rcv_msg+0x3c7/0xe00 [ 63.151984][ T5058] ? rtnl_fill_vf+0x490/0x490 [ 63.156666][ T5058] netlink_rcv_skb+0x16b/0x440 [ 63.161432][ T5058] ? rtnl_fill_vf+0x490/0x490 [ 63.166100][ T5058] ? netlink_ack+0x1380/0x1380 [ 63.170863][ T5058] ? lock_sync+0x190/0x190 [ 63.175271][ T5058] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 63.181600][ T5058] ? netlink_deliver_tap+0x1a0/0xd00 [ 63.186882][ T5058] ? _copy_from_iter+0x2c1/0x10f0 [ 63.191909][ T5058] netlink_unicast+0x53b/0x810 [ 63.196678][ T5058] ? netlink_attachskb+0x870/0x870 [ 63.201789][ T5058] ? __phys_addr_symbol+0x30/0x70 [ 63.206816][ T5058] ? __check_object_size+0x322/0x730 [ 63.212104][ T5058] netlink_sendmsg+0x8b4/0xd70 [ 63.216872][ T5058] ? netlink_unicast+0x810/0x810 [ 63.221810][ T5058] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 63.227097][ T5058] ? netlink_unicast+0x810/0x810 [ 63.232031][ T5058] __sock_sendmsg+0xd5/0x180 [ 63.236629][ T5058] ____sys_sendmsg+0x6ac/0x940 [ 63.241396][ T5058] ? copy_msghdr_from_user+0x10b/0x160 [ 63.246850][ T5058] ? kernel_sendmsg+0x50/0x50 [ 63.251533][ T5058] ? finish_task_switch.isra.0+0x217/0xcb0 [ 63.257340][ T5058] ? __switch_to+0x749/0x1370 [ 63.262034][ T5058] ___sys_sendmsg+0x135/0x1d0 [ 63.266709][ T5058] ? do_recvmmsg+0x740/0x740 [ 63.271294][ T5058] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 63.277370][ T5058] ? lock_sync+0x190/0x190 [ 63.281780][ T5058] ? ptrace_stop.part.0+0x44a/0x930 [ 63.287069][ T5058] ? __fget_light+0x172/0x200 [ 63.291754][ T5058] __sys_sendmsg+0x117/0x1e0 [ 63.296429][ T5058] ? __sys_sendmsg_sock+0x30/0x30 [ 63.301449][ T5058] ? ptrace_notify+0xf1/0x130 [ 63.306130][ T5058] ? _raw_spin_unlock_irq+0x2e/0x50 [ 63.311342][ T5058] ? ptrace_notify+0xf1/0x130 [ 63.316019][ T5058] do_syscall_64+0xd0/0x250 [ 63.320532][ T5058] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 63.326435][ T5058] RIP: 0033:0x7fb5c4e1e5a9 [ 63.330846][ T5058] 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 [ 63.350535][ T5058] RSP: 002b:00007ffe78390d78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.358942][ T5058] RAX: ffffffffffffffda RBX: 00007ffe78390f48 RCX: 00007fb5c4e1e5a9 [ 63.366911][ T5058] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 63.374879][ T5058] RBP: 00007fb5c4e91610 R08: 000000000000000a R09: 00007ffe78390f48 [ 63.382934][ T5058] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 63.390910][ T5058] R13: 00007ffe78390f38 R14: 0000000000000001 R15: 0000000000000001 [ 63.398886][ T5058] [ 63.401901][ T5058] Modules linked in: [ 63.405790][ T5058] CR2: 0000000000000000 [ 63.409933][ T5058] ---[ end trace 0000000000000000 ]--- [ 63.415384][ T5058] RIP: 0010:0x0 [ 63.418843][ T5058] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 63.426196][ T5058] RSP: 0018:ffffc90003a1f408 EFLAGS: 00010246 [ 63.432254][ T5058] RAX: dffffc0000000000 RBX: ffff888070908000 RCX: ffffffff889a5187 [ 63.440220][ T5058] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888070908000 [ 63.448274][ T5058] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 63.456243][ T5058] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff888013b90000 [ 63.465249][ T5058] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 63.473301][ T5058] FS: 0000555556322380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 63.482227][ T5058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.488977][ T5058] CR2: ffffffffffffffd6 CR3: 000000001a2fd000 CR4: 00000000003506f0 [ 63.496958][ T5058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.504934][ T5058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.512906][ T5058] Kernel panic - not syncing: Fatal exception [ 63.519245][ T5058] Kernel Offset: disabled [ 63.523548][ T5058] Rebooting in 86400 seconds..