./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2186968323 <...> Warning: Permanently added '10.128.0.240' (ED25519) to the list of known hosts. execve("./syz-executor2186968323", ["./syz-executor2186968323"], 0x7fff9bb9ed60 /* 10 vars */) = 0 brk(NULL) = 0x55555645a000 brk(0x55555645ad00) = 0x55555645ad00 arch_prctl(ARCH_SET_FS, 0x55555645a380) = 0 set_tid_address(0x55555645a650) = 5063 set_robust_list(0x55555645a660, 24) = 0 rseq(0x55555645aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2186968323", 4096) = 28 getrandom("\x22\x95\x35\xe9\x35\x08\xc5\x0f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555645ad00 brk(0x55555647bd00) = 0x55555647bd00 brk(0x55555647c000) = 0x55555647c000 mprotect(0x7fea656e1000, 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 [ 67.407788][ T5063] netlink: 56 bytes leftover after parsing attributes in process `syz-executor218'. [ 67.417440][ T5063] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 67.425330][ T5063] #PF: supervisor instruction fetch in kernel mode [ 67.431895][ T5063] #PF: error_code(0x0010) - not-present page [ 67.437852][ T5063] PGD 22c73067 P4D 22c73067 PUD 1d16b067 PMD 0 [ 67.444103][ T5063] Oops: 0010 [#1] PREEMPT SMP KASAN [ 67.449372][ T5063] CPU: 0 PID: 5063 Comm: syz-executor218 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 67.459242][ T5063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 67.469383][ T5063] RIP: 0010:0x0 [ 67.472849][ T5063] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 67.480296][ T5063] RSP: 0018:ffffc90003eff408 EFLAGS: 00010246 [ 67.486441][ T5063] RAX: dffffc0000000000 RBX: ffff88807b598000 RCX: ffffffff889a5187 [ 67.494402][ T5063] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807b598000 [ 67.502370][ T5063] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 67.510510][ T5063] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b48000 [ 67.518853][ T5063] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 67.527454][ T5063] FS: 000055555645a380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 67.536735][ T5063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.543319][ T5063] CR2: ffffffffffffffd6 CR3: 0000000066e0b000 CR4: 00000000003506f0 [ 67.551570][ T5063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.559530][ T5063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.567489][ T5063] Call Trace: [ 67.570764][ T5063] [ 67.573689][ T5063] ? show_regs+0x8e/0xa0 [ 67.577958][ T5063] ? __die+0x2c/0x80 [ 67.581878][ T5063] ? page_fault_oops+0x397/0xab0 [ 67.586912][ T5063] ? dump_pagetable+0x530/0x530 [ 67.591778][ T5063] ? netem_change+0x1505/0x2520 [ 67.596687][ T5063] ? netem_dump+0x1260/0x1260 [ 67.601350][ T5063] ? do_user_addr_fault+0x562/0x1020 [ 67.606656][ T5063] ? rcu_is_watching+0x12/0xb0 [ 67.611627][ T5063] ? exc_page_fault+0x5c/0xc0 [ 67.616409][ T5063] ? asm_exc_page_fault+0x26/0x30 [ 67.621785][ T5063] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 67.628030][ T5063] ? qdisc_create+0xca7/0x1440 [ 67.632898][ T5063] qdisc_create+0x6c0/0x1440 [ 67.637491][ T5063] ? tc_get_qdisc+0xdf0/0xdf0 [ 67.642260][ T5063] ? __nla_parse+0x40/0x50 [ 67.646694][ T5063] tc_modify_qdisc+0x4d5/0x1c30 [ 67.651643][ T5063] ? qdisc_create+0x1440/0x1440 [ 67.656689][ T5063] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 67.662760][ T5063] ? bpf_lsm_capable+0x9/0x10 [ 67.667595][ T5063] ? security_capable+0x92/0xc0 [ 67.672550][ T5063] ? qdisc_create+0x1440/0x1440 [ 67.677424][ T5063] rtnetlink_rcv_msg+0x3c7/0xe00 [ 67.682357][ T5063] ? rtnl_fill_vf+0x490/0x490 [ 67.687028][ T5063] netlink_rcv_skb+0x16b/0x440 [ 67.691793][ T5063] ? rtnl_fill_vf+0x490/0x490 [ 67.696479][ T5063] ? netlink_ack+0x1380/0x1380 [ 67.701319][ T5063] ? lock_sync+0x190/0x190 [ 67.705719][ T5063] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 67.712147][ T5063] ? netlink_deliver_tap+0x1a0/0xd00 [ 67.717542][ T5063] ? _copy_from_iter+0x2c1/0x10f0 [ 67.722644][ T5063] netlink_unicast+0x53b/0x810 [ 67.727518][ T5063] ? netlink_attachskb+0x870/0x870 [ 67.732617][ T5063] ? __phys_addr_symbol+0x30/0x70 [ 67.737652][ T5063] ? __check_object_size+0x322/0x730 [ 67.743093][ T5063] netlink_sendmsg+0x8b4/0xd70 [ 67.747917][ T5063] ? netlink_unicast+0x810/0x810 [ 67.752939][ T5063] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 67.758220][ T5063] ? netlink_unicast+0x810/0x810 [ 67.763252][ T5063] __sock_sendmsg+0xd5/0x180 [ 67.767926][ T5063] ____sys_sendmsg+0x6ac/0x940 [ 67.772686][ T5063] ? copy_msghdr_from_user+0x10b/0x160 [ 67.778305][ T5063] ? kernel_sendmsg+0x50/0x50 [ 67.782979][ T5063] ? finish_task_switch.isra.0+0x217/0xcb0 [ 67.788773][ T5063] ? __switch_to+0x749/0x1370 [ 67.793712][ T5063] ___sys_sendmsg+0x135/0x1d0 [ 67.798464][ T5063] ? do_recvmmsg+0x740/0x740 [ 67.803127][ T5063] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 67.809103][ T5063] ? lock_sync+0x190/0x190 [ 67.813506][ T5063] ? ptrace_stop.part.0+0x44a/0x930 [ 67.818697][ T5063] ? __fget_light+0x172/0x200 [ 67.823364][ T5063] __sys_sendmsg+0x117/0x1e0 [ 67.827996][ T5063] ? __sys_sendmsg_sock+0x30/0x30 [ 67.833020][ T5063] ? ptrace_notify+0xf1/0x130 [ 67.837690][ T5063] ? _raw_spin_unlock_irq+0x2e/0x50 [ 67.842877][ T5063] ? ptrace_notify+0xf1/0x130 [ 67.847880][ T5063] do_syscall_64+0xd0/0x250 [ 67.852378][ T5063] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 67.858257][ T5063] RIP: 0033:0x7fea6566e3e9 [ 67.862658][ T5063] 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 [ 67.882426][ T5063] RSP: 002b:00007ffee9957ca8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.890821][ T5063] RAX: ffffffffffffffda RBX: 00007ffee9957e78 RCX: 00007fea6566e3e9 [ 67.898876][ T5063] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 67.906877][ T5063] RBP: 00007fea656e1610 R08: 00007ffee9957e78 R09: 00007ffee9957e78 [ 67.914859][ T5063] R10: 00007ffee9957e78 R11: 0000000000000246 R12: 0000000000000001 [ 67.922814][ T5063] R13: 00007ffee9957e68 R14: 0000000000000001 R15: 0000000000000001 [ 67.930950][ T5063] [ 67.933952][ T5063] Modules linked in: [ 67.937826][ T5063] CR2: 0000000000000000 [ 67.941960][ T5063] ---[ end trace 0000000000000000 ]--- [ 67.947395][ T5063] RIP: 0010:0x0 [ 67.951191][ T5063] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 67.958541][ T5063] RSP: 0018:ffffc90003eff408 EFLAGS: 00010246 [ 67.964700][ T5063] RAX: dffffc0000000000 RBX: ffff88807b598000 RCX: ffffffff889a5187 [ 67.972662][ T5063] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807b598000 [ 67.980620][ T5063] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 67.988580][ T5063] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b48000 [ 67.996537][ T5063] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 68.004508][ T5063] FS: 000055555645a380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 68.013643][ T5063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.020304][ T5063] CR2: ffffffffffffffd6 CR3: 0000000066e0b000 CR4: 00000000003506f0 [ 68.028265][ T5063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.036225][ T5063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.044202][ T5063] Kernel panic - not syncing: Fatal exception [ 68.050588][ T5063] Kernel Offset: disabled [ 68.054901][ T5063] Rebooting in 86400 seconds..