./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor896147331 <...> Warning: Permanently added '10.128.0.152' (ED25519) to the list of known hosts. execve("./syz-executor896147331", ["./syz-executor896147331"], 0x7fff181835c0 /* 10 vars */) = 0 brk(NULL) = 0x555557437000 brk(0x555557437d00) = 0x555557437d00 arch_prctl(ARCH_SET_FS, 0x555557437380) = 0 set_tid_address(0x555557437650) = 5061 set_robust_list(0x555557437660, 24) = 0 rseq(0x555557437ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor896147331", 4096) = 27 getrandom("\x77\x6d\x6b\xa5\xb3\x0c\xc6\x66", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557437d00 brk(0x555557458d00) = 0x555557458d00 brk(0x555557459000) = 0x555557459000 mprotect(0x7f53ef6de000, 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 [ 91.247523][ T5061] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 91.255381][ T5061] #PF: supervisor instruction fetch in kernel mode [ 91.261879][ T5061] #PF: error_code(0x0010) - not-present page [ 91.267855][ T5061] PGD 227d7067 P4D 227d7067 PUD 227d5067 PMD 0 [ 91.274129][ T5061] Oops: 0010 [#1] PREEMPT SMP KASAN [ 91.279340][ T5061] CPU: 1 PID: 5061 Comm: syz-executor896 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 91.289243][ T5061] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 91.299314][ T5061] RIP: 0010:0x0 [ 91.302805][ T5061] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 91.310169][ T5061] RSP: 0018:ffffc90003a97408 EFLAGS: 00010246 [ 91.316243][ T5061] RAX: dffffc0000000000 RBX: ffff88807d7e3000 RCX: ffffffff889a5187 [ 91.324220][ T5061] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807d7e3000 [ 91.332194][ T5061] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 91.340171][ T5061] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013bb0000 [ 91.348145][ T5061] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 91.356146][ T5061] FS: 0000555557437380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 91.365176][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.371770][ T5061] CR2: ffffffffffffffd6 CR3: 000000001ed3e000 CR4: 00000000003506f0 [ 91.379749][ T5061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.387741][ T5061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.395731][ T5061] Call Trace: [ 91.399017][ T5061] [ 91.401952][ T5061] ? show_regs+0x8e/0xa0 [ 91.406330][ T5061] ? __die+0x2c/0x80 [ 91.410262][ T5061] ? page_fault_oops+0x397/0xab0 [ 91.415237][ T5061] ? dump_pagetable+0x530/0x530 [ 91.420104][ T5061] ? netem_change+0x1505/0x2520 [ 91.424986][ T5061] ? netem_dump+0x1260/0x1260 [ 91.429679][ T5061] ? do_user_addr_fault+0x562/0x1020 [ 91.435012][ T5061] ? rcu_is_watching+0x12/0xb0 [ 91.439795][ T5061] ? exc_page_fault+0x5c/0xc0 [ 91.444481][ T5061] ? asm_exc_page_fault+0x26/0x30 [ 91.449517][ T5061] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 91.455617][ T5061] ? qdisc_create+0xca7/0x1440 [ 91.460402][ T5061] qdisc_create+0x6c0/0x1440 [ 91.465015][ T5061] ? tc_get_qdisc+0xdf0/0xdf0 [ 91.469707][ T5061] ? __nla_parse+0x40/0x50 [ 91.474141][ T5061] tc_modify_qdisc+0x4d5/0x1c30 [ 91.479017][ T5061] ? qdisc_create+0x1440/0x1440 [ 91.483887][ T5061] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 91.489895][ T5061] ? bpf_lsm_capable+0x9/0x10 [ 91.494580][ T5061] ? security_capable+0x92/0xc0 [ 91.499715][ T5061] ? qdisc_create+0x1440/0x1440 [ 91.504590][ T5061] rtnetlink_rcv_msg+0x3c7/0xe00 [ 91.509554][ T5061] ? rtnl_fill_vf+0x490/0x490 [ 91.514332][ T5061] netlink_rcv_skb+0x16b/0x440 [ 91.519116][ T5061] ? rtnl_fill_vf+0x490/0x490 [ 91.523834][ T5061] ? netlink_ack+0x1380/0x1380 [ 91.528612][ T5061] ? lock_sync+0x190/0x190 [ 91.533033][ T5061] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 91.539385][ T5061] ? netlink_deliver_tap+0x1a0/0xd00 [ 91.544680][ T5061] ? _copy_from_iter+0x2c1/0x10f0 [ 91.549716][ T5061] netlink_unicast+0x53b/0x810 [ 91.554503][ T5061] ? netlink_attachskb+0x870/0x870 [ 91.559647][ T5061] ? __phys_addr_symbol+0x30/0x70 [ 91.564694][ T5061] ? __check_object_size+0x322/0x730 [ 91.570020][ T5061] netlink_sendmsg+0x8b4/0xd70 [ 91.574805][ T5061] ? netlink_unicast+0x810/0x810 [ 91.579758][ T5061] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 91.585081][ T5061] ? netlink_unicast+0x810/0x810 [ 91.590034][ T5061] __sock_sendmsg+0xd5/0x180 [ 91.594648][ T5061] ____sys_sendmsg+0x6ac/0x940 [ 91.599521][ T5061] ? copy_msghdr_from_user+0x10b/0x160 [ 91.605003][ T5061] ? kernel_sendmsg+0x50/0x50 [ 91.609714][ T5061] ? finish_task_switch.isra.0+0x217/0xcb0 [ 91.615545][ T5061] ? __switch_to+0x749/0x1370 [ 91.620243][ T5061] ___sys_sendmsg+0x135/0x1d0 [ 91.624938][ T5061] ? do_recvmmsg+0x740/0x740 [ 91.629560][ T5061] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 91.635570][ T5061] ? lock_sync+0x190/0x190 [ 91.640007][ T5061] ? ptrace_stop.part.0+0x44a/0x930 [ 91.645250][ T5061] ? __fget_light+0x172/0x200 [ 91.650054][ T5061] __sys_sendmsg+0x117/0x1e0 [ 91.654767][ T5061] ? __sys_sendmsg_sock+0x30/0x30 [ 91.659819][ T5061] ? ptrace_notify+0xf1/0x130 [ 91.664519][ T5061] ? _raw_spin_unlock_irq+0x2e/0x50 [ 91.669749][ T5061] ? ptrace_notify+0xf1/0x130 [ 91.674457][ T5061] do_syscall_64+0xd0/0x250 [ 91.679001][ T5061] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 91.684927][ T5061] RIP: 0033:0x7f53ef66b5a9 [ 91.689356][ T5061] 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 [ 91.708973][ T5061] RSP: 002b:00007ffdd8d62b38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 91.717483][ T5061] RAX: ffffffffffffffda RBX: 00007ffdd8d62d08 RCX: 00007f53ef66b5a9 [ 91.725459][ T5061] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 91.733450][ T5061] RBP: 00007f53ef6de610 R08: 000000000000000a R09: 00007ffdd8d62d08 [ 91.741438][ T5061] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 91.749412][ T5061] R13: 00007ffdd8d62cf8 R14: 0000000000000001 R15: 0000000000000001 [ 91.757584][ T5061] [ 91.760622][ T5061] Modules linked in: [ 91.764520][ T5061] CR2: 0000000000000000 [ 91.768668][ T5061] ---[ end trace 0000000000000000 ]--- [ 91.774118][ T5061] RIP: 0010:0x0 [ 91.777591][ T5061] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 91.784956][ T5061] RSP: 0018:ffffc90003a97408 EFLAGS: 00010246 [ 91.791059][ T5061] RAX: dffffc0000000000 RBX: ffff88807d7e3000 RCX: ffffffff889a5187 [ 91.799042][ T5061] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807d7e3000 [ 91.807025][ T5061] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 91.815018][ T5061] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013bb0000 [ 91.822995][ T5061] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 91.830976][ T5061] FS: 0000555557437380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 91.839917][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.846524][ T5061] CR2: ffffffffffffffd6 CR3: 000000001ed3e000 CR4: 00000000003506f0 [ 91.854505][ T5061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.862481][ T5061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.870456][ T5061] Kernel panic - not syncing: Fatal exception [ 91.876819][ T5061] Kernel Offset: disabled [ 91.881160][ T5061] Rebooting in 86400 seconds..