./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3255234559 <...> Warning: Permanently added '10.128.1.57' (ED25519) to the list of known hosts. execve("./syz-executor3255234559", ["./syz-executor3255234559"], 0x7ffea50c1030 /* 10 vars */) = 0 brk(NULL) = 0x555556989000 brk(0x555556989d00) = 0x555556989d00 arch_prctl(ARCH_SET_FS, 0x555556989380) = 0 set_tid_address(0x555556989650) = 5061 set_robust_list(0x555556989660, 24) = 0 rseq(0x555556989ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3255234559", 4096) = 28 getrandom("\x8b\x83\xf1\x99\x6a\x88\x5a\x66", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556989d00 brk(0x5555569aad00) = 0x5555569aad00 brk(0x5555569ab000) = 0x5555569ab000 mprotect(0x7fc218061000, 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 [ 86.943479][ T5061] netlink: 56 bytes leftover after parsing attributes in process `syz-executor325'. [ 86.953022][ T5061] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 86.960835][ T5061] #PF: supervisor instruction fetch in kernel mode [ 86.967344][ T5061] #PF: error_code(0x0010) - not-present page [ 86.973341][ T5061] PGD 790da067 P4D 790da067 PUD 21391067 PMD 0 [ 86.979602][ T5061] Oops: 0010 [#1] PREEMPT SMP KASAN [ 86.984798][ T5061] CPU: 1 PID: 5061 Comm: syz-executor325 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 86.994685][ T5061] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 87.004737][ T5061] RIP: 0010:0x0 [ 87.008202][ T5061] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 87.015561][ T5061] RSP: 0018:ffffc9000398f408 EFLAGS: 00010246 [ 87.021719][ T5061] RAX: dffffc0000000000 RBX: ffff88807d186000 RCX: ffffffff889a5187 [ 87.029711][ T5061] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807d186000 [ 87.037687][ T5061] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 87.045661][ T5061] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013bc0000 [ 87.053636][ T5061] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 87.061619][ T5061] FS: 0000555556989380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 87.070569][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.077176][ T5061] CR2: ffffffffffffffd6 CR3: 0000000022b19000 CR4: 00000000003506f0 [ 87.085160][ T5061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.093320][ T5061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.101303][ T5061] Call Trace: [ 87.104597][ T5061] [ 87.107556][ T5061] ? show_regs+0x8e/0xa0 [ 87.111848][ T5061] ? __die+0x2c/0x80 [ 87.115769][ T5061] ? page_fault_oops+0x397/0xab0 [ 87.120732][ T5061] ? dump_pagetable+0x530/0x530 [ 87.125612][ T5061] ? netem_change+0x1505/0x2520 [ 87.130497][ T5061] ? netem_dump+0x1260/0x1260 [ 87.135195][ T5061] ? do_user_addr_fault+0x562/0x1020 [ 87.140506][ T5061] ? rcu_is_watching+0x12/0xb0 [ 87.145294][ T5061] ? exc_page_fault+0x5c/0xc0 [ 87.149993][ T5061] ? asm_exc_page_fault+0x26/0x30 [ 87.155039][ T5061] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 87.161129][ T5061] ? qdisc_create+0xca7/0x1440 [ 87.165946][ T5061] qdisc_create+0x6c0/0x1440 [ 87.170609][ T5061] ? tc_get_qdisc+0xdf0/0xdf0 [ 87.175318][ T5061] ? __nla_parse+0x40/0x50 [ 87.179765][ T5061] tc_modify_qdisc+0x4d5/0x1c30 [ 87.184652][ T5061] ? qdisc_create+0x1440/0x1440 [ 87.189537][ T5061] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 87.195561][ T5061] ? bpf_lsm_capable+0x9/0x10 [ 87.200259][ T5061] ? security_capable+0x92/0xc0 [ 87.205150][ T5061] ? qdisc_create+0x1440/0x1440 [ 87.210033][ T5061] rtnetlink_rcv_msg+0x3c7/0xe00 [ 87.214991][ T5061] ? rtnl_fill_vf+0x490/0x490 [ 87.219708][ T5061] netlink_rcv_skb+0x16b/0x440 [ 87.224594][ T5061] ? rtnl_fill_vf+0x490/0x490 [ 87.229292][ T5061] ? netlink_ack+0x1380/0x1380 [ 87.234080][ T5061] ? lock_sync+0x190/0x190 [ 87.238513][ T5061] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 87.244878][ T5061] ? netlink_deliver_tap+0x1a0/0xd00 [ 87.250187][ T5061] ? _copy_from_iter+0x2c1/0x10f0 [ 87.255238][ T5061] netlink_unicast+0x53b/0x810 [ 87.260029][ T5061] ? netlink_attachskb+0x870/0x870 [ 87.265167][ T5061] ? __phys_addr_symbol+0x30/0x70 [ 87.270220][ T5061] ? __check_object_size+0x322/0x730 [ 87.275627][ T5061] netlink_sendmsg+0x8b4/0xd70 [ 87.280423][ T5061] ? netlink_unicast+0x810/0x810 [ 87.285392][ T5061] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 87.290712][ T5061] ? netlink_unicast+0x810/0x810 [ 87.295675][ T5061] __sock_sendmsg+0xd5/0x180 [ 87.300308][ T5061] ____sys_sendmsg+0x6ac/0x940 [ 87.305137][ T5061] ? copy_msghdr_from_user+0x10b/0x160 [ 87.310629][ T5061] ? kernel_sendmsg+0x50/0x50 [ 87.315354][ T5061] ? finish_task_switch.isra.0+0x217/0xcb0 [ 87.321200][ T5061] ? __switch_to+0x749/0x1370 [ 87.325910][ T5061] ___sys_sendmsg+0x135/0x1d0 [ 87.330618][ T5061] ? do_recvmmsg+0x740/0x740 [ 87.335227][ T5061] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 87.341249][ T5061] ? lock_sync+0x190/0x190 [ 87.345680][ T5061] ? ptrace_stop.part.0+0x44a/0x930 [ 87.350911][ T5061] ? __fget_light+0x172/0x200 [ 87.355627][ T5061] __sys_sendmsg+0x117/0x1e0 [ 87.360252][ T5061] ? __sys_sendmsg_sock+0x30/0x30 [ 87.365293][ T5061] ? ptrace_notify+0xf1/0x130 [ 87.369997][ T5061] ? _raw_spin_unlock_irq+0x2e/0x50 [ 87.375219][ T5061] ? ptrace_notify+0xf1/0x130 [ 87.379918][ T5061] do_syscall_64+0xd0/0x250 [ 87.384472][ T5061] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 87.390386][ T5061] RIP: 0033:0x7fc217fee3e9 [ 87.394826][ 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 [ 87.414813][ T5061] RSP: 002b:00007ffccfb97fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.423251][ T5061] RAX: ffffffffffffffda RBX: 00007ffccfb981a8 RCX: 00007fc217fee3e9 [ 87.431248][ T5061] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 87.439239][ T5061] RBP: 00007fc218061610 R08: 00007ffccfb981a8 R09: 00007ffccfb981a8 [ 87.447241][ T5061] R10: 00007ffccfb981a8 R11: 0000000000000246 R12: 0000000000000001 [ 87.455225][ T5061] R13: 00007ffccfb98198 R14: 0000000000000001 R15: 0000000000000001 [ 87.463225][ T5061] [ 87.466254][ T5061] Modules linked in: [ 87.470160][ T5061] CR2: 0000000000000000 [ 87.474321][ T5061] ---[ end trace 0000000000000000 ]--- [ 87.479786][ T5061] RIP: 0010:0x0 [ 87.483267][ T5061] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 87.490641][ T5061] RSP: 0018:ffffc9000398f408 EFLAGS: 00010246 [ 87.496730][ T5061] RAX: dffffc0000000000 RBX: ffff88807d186000 RCX: ffffffff889a5187 [ 87.504718][ T5061] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807d186000 [ 87.512806][ T5061] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 87.520799][ T5061] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013bc0000 [ 87.528793][ T5061] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 87.536782][ T5061] FS: 0000555556989380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 87.545732][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.552335][ T5061] CR2: ffffffffffffffd6 CR3: 0000000022b19000 CR4: 00000000003506f0 [ 87.560430][ T5061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.568429][ T5061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.576415][ T5061] Kernel panic - not syncing: Fatal exception [ 87.582577][ T5061] Kernel Offset: disabled [ 87.586901][ T5061] Rebooting in 86400 seconds..