./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor538763336 <...> Warning: Permanently added '10.128.1.117' (ED25519) to the list of known hosts. execve("./syz-executor538763336", ["./syz-executor538763336"], 0x7ffd96f97300 /* 10 vars */) = 0 brk(NULL) = 0x55555732c000 brk(0x55555732cd00) = 0x55555732cd00 arch_prctl(ARCH_SET_FS, 0x55555732c380) = 0 set_tid_address(0x55555732c650) = 5055 set_robust_list(0x55555732c660, 24) = 0 rseq(0x55555732cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor538763336", 4096) = 27 getrandom("\x8f\xc4\x4b\x40\xd4\x6c\x18\xaf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555732cd00 brk(0x55555734dd00) = 0x55555734dd00 brk(0x55555734e000) = 0x55555734e000 mprotect(0x7f569349f000, 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 [ 59.832340][ T5055] netlink: 56 bytes leftover after parsing attributes in process `syz-executor538'. [ 59.841759][ T5055] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 59.849538][ T5055] #PF: supervisor instruction fetch in kernel mode [ 59.856012][ T5055] #PF: error_code(0x0010) - not-present page [ 59.861963][ T5055] PGD 23aa0067 P4D 23aa0067 PUD 1e00d067 PMD 0 [ 59.868194][ T5055] Oops: 0010 [#1] PREEMPT SMP KASAN [ 59.873381][ T5055] CPU: 1 PID: 5055 Comm: syz-executor538 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 59.883257][ T5055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 59.893290][ T5055] RIP: 0010:0x0 [ 59.896745][ T5055] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 59.904083][ T5055] RSP: 0018:ffffc90003c77408 EFLAGS: 00010246 [ 59.910126][ T5055] RAX: dffffc0000000000 RBX: ffff88807da94000 RCX: ffffffff889a5187 [ 59.918073][ T5055] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807da94000 [ 59.926020][ T5055] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 59.933968][ T5055] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff888013b90000 [ 59.941916][ T5055] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 59.949868][ T5055] FS: 000055555732c380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 59.958778][ T5055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.965341][ T5055] CR2: ffffffffffffffd6 CR3: 0000000021b9d000 CR4: 00000000003506f0 [ 59.973305][ T5055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.981253][ T5055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.989202][ T5055] Call Trace: [ 59.992461][ T5055] [ 59.995383][ T5055] ? show_regs+0x8e/0xa0 [ 59.999623][ T5055] ? __die+0x2c/0x80 [ 60.003502][ T5055] ? page_fault_oops+0x397/0xab0 [ 60.008421][ T5055] ? dump_pagetable+0x530/0x530 [ 60.013251][ T5055] ? netem_change+0x1505/0x2520 [ 60.018087][ T5055] ? netem_dump+0x1260/0x1260 [ 60.022742][ T5055] ? do_user_addr_fault+0x562/0x1020 [ 60.028005][ T5055] ? rcu_is_watching+0x12/0xb0 [ 60.032751][ T5055] ? exc_page_fault+0x5c/0xc0 [ 60.037408][ T5055] ? asm_exc_page_fault+0x26/0x30 [ 60.042413][ T5055] ? kasan_save_stack+0x33/0x50 [ 60.047244][ T5055] ? qdisc_create+0xca7/0x1440 [ 60.051992][ T5055] qdisc_create+0x6c0/0x1440 [ 60.056568][ T5055] ? tc_get_qdisc+0xdf0/0xdf0 [ 60.061229][ T5055] ? __nla_parse+0x40/0x50 [ 60.065627][ T5055] tc_modify_qdisc+0x4d5/0x1c30 [ 60.070463][ T5055] ? qdisc_create+0x1440/0x1440 [ 60.075295][ T5055] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 60.081269][ T5055] ? bpf_lsm_capable+0x9/0x10 [ 60.085924][ T5055] ? security_capable+0x92/0xc0 [ 60.090761][ T5055] ? qdisc_create+0x1440/0x1440 [ 60.095593][ T5055] rtnetlink_rcv_msg+0x3c7/0xe00 [ 60.100512][ T5055] ? rtnl_fill_vf+0x490/0x490 [ 60.105170][ T5055] netlink_rcv_skb+0x16b/0x440 [ 60.109917][ T5055] ? rtnl_fill_vf+0x490/0x490 [ 60.114571][ T5055] ? netlink_ack+0x1380/0x1380 [ 60.119316][ T5055] ? lock_sync+0x190/0x190 [ 60.123712][ T5055] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 60.130023][ T5055] ? netlink_deliver_tap+0x1a0/0xd00 [ 60.135287][ T5055] ? _copy_from_iter+0x2c1/0x10f0 [ 60.140292][ T5055] netlink_unicast+0x53b/0x810 [ 60.145040][ T5055] ? netlink_attachskb+0x870/0x870 [ 60.150134][ T5055] ? __phys_addr_symbol+0x30/0x70 [ 60.155140][ T5055] ? __check_object_size+0x322/0x730 [ 60.160412][ T5055] netlink_sendmsg+0x8b4/0xd70 [ 60.165160][ T5055] ? netlink_unicast+0x810/0x810 [ 60.170078][ T5055] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 60.175347][ T5055] ? netlink_unicast+0x810/0x810 [ 60.180266][ T5055] __sock_sendmsg+0xd5/0x180 [ 60.184844][ T5055] ____sys_sendmsg+0x6ac/0x940 [ 60.189596][ T5055] ? copy_msghdr_from_user+0x10b/0x160 [ 60.195048][ T5055] ? kernel_sendmsg+0x50/0x50 [ 60.199721][ T5055] ? finish_task_switch.isra.0+0x217/0xcb0 [ 60.205530][ T5055] ? __switch_to+0x749/0x1370 [ 60.210213][ T5055] ___sys_sendmsg+0x135/0x1d0 [ 60.214874][ T5055] ? do_recvmmsg+0x740/0x740 [ 60.219468][ T5055] ? lock_sync+0x190/0x190 [ 60.223866][ T5055] ? ptrace_stop.part.0+0x44a/0x930 [ 60.229053][ T5055] ? __fget_light+0x172/0x200 [ 60.233715][ T5055] __sys_sendmsg+0x117/0x1e0 [ 60.238287][ T5055] ? __sys_sendmsg_sock+0x30/0x30 [ 60.243291][ T5055] ? ptrace_notify+0xf1/0x130 [ 60.247986][ T5055] ? _raw_spin_unlock_irq+0x2e/0x50 [ 60.253170][ T5055] ? ptrace_notify+0xf1/0x130 [ 60.257829][ T5055] do_syscall_64+0xd0/0x250 [ 60.262320][ T5055] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 60.268196][ T5055] RIP: 0033:0x7f569342c3e9 [ 60.272596][ T5055] 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 [ 60.292182][ T5055] RSP: 002b:00007ffed50b8348 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 60.300570][ T5055] RAX: ffffffffffffffda RBX: 00007ffed50b8518 RCX: 00007f569342c3e9 [ 60.308522][ T5055] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 60.316469][ T5055] RBP: 00007f569349f610 R08: 00007ffed50b8518 R09: 00007ffed50b8518 [ 60.324418][ T5055] R10: 00007ffed50b8518 R11: 0000000000000246 R12: 0000000000000001 [ 60.332367][ T5055] R13: 00007ffed50b8508 R14: 0000000000000001 R15: 0000000000000001 [ 60.340320][ T5055] [ 60.343319][ T5055] Modules linked in: [ 60.347187][ T5055] CR2: 0000000000000000 [ 60.351313][ T5055] ---[ end trace 0000000000000000 ]--- [ 60.356742][ T5055] RIP: 0010:0x0 [ 60.360188][ T5055] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 60.367525][ T5055] RSP: 0018:ffffc90003c77408 EFLAGS: 00010246 [ 60.373569][ T5055] RAX: dffffc0000000000 RBX: ffff88807da94000 RCX: ffffffff889a5187 [ 60.381519][ T5055] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807da94000 [ 60.389474][ T5055] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 60.397424][ T5055] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff888013b90000 [ 60.405373][ T5055] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 60.413324][ T5055] FS: 000055555732c380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 60.422231][ T5055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.428807][ T5055] CR2: ffffffffffffffd6 CR3: 0000000021b9d000 CR4: 00000000003506f0 [ 60.436760][ T5055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.444718][ T5055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.452669][ T5055] Kernel panic - not syncing: Fatal exception [ 60.458912][ T5055] Kernel Offset: disabled [ 60.463228][ T5055] Rebooting in 86400 seconds..