./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3783407820 <...> Warning: Permanently added '10.128.1.64' (ED25519) to the list of known hosts. execve("./syz-executor3783407820", ["./syz-executor3783407820"], 0x7ffde9988cf0 /* 10 vars */) = 0 brk(NULL) = 0x555556f26000 brk(0x555556f26d00) = 0x555556f26d00 arch_prctl(ARCH_SET_FS, 0x555556f26380) = 0 set_tid_address(0x555556f26650) = 5054 set_robust_list(0x555556f26660, 24) = 0 rseq(0x555556f26ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3783407820", 4096) = 28 getrandom("\x22\x6a\x88\xaf\x4c\x3d\x02\x29", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556f26d00 brk(0x555556f47d00) = 0x555556f47d00 brk(0x555556f48000) = 0x555556f48000 mprotect(0x7f44aa2da000, 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 [ 62.434311][ T5054] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 62.442152][ T5054] #PF: supervisor instruction fetch in kernel mode [ 62.448635][ T5054] #PF: error_code(0x0010) - not-present page [ 62.454591][ T5054] PGD 2aeb2067 P4D 2aeb2067 PUD 28ea2067 PMD 0 [ 62.460839][ T5054] Oops: 0010 [#1] PREEMPT SMP KASAN [ 62.466021][ T5054] CPU: 1 PID: 5054 Comm: syz-executor378 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 62.475900][ T5054] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 62.485941][ T5054] RIP: 0010:0x0 [ 62.489399][ T5054] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.496747][ T5054] RSP: 0018:ffffc90003a37408 EFLAGS: 00010246 [ 62.502808][ T5054] RAX: dffffc0000000000 RBX: ffff88802187c000 RCX: ffffffff889a5187 [ 62.510760][ T5054] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88802187c000 [ 62.518723][ T5054] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.526696][ T5054] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b48000 [ 62.534654][ T5054] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.542617][ T5054] FS: 0000555556f26380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 62.551540][ T5054] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.558118][ T5054] CR2: ffffffffffffffd6 CR3: 0000000020cc3000 CR4: 00000000003506f0 [ 62.566084][ T5054] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.574055][ T5054] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.582019][ T5054] Call Trace: [ 62.585288][ T5054] [ 62.588209][ T5054] ? show_regs+0x8e/0xa0 [ 62.592471][ T5054] ? __die+0x2c/0x80 [ 62.596362][ T5054] ? page_fault_oops+0x397/0xab0 [ 62.601297][ T5054] ? dump_pagetable+0x530/0x530 [ 62.606143][ T5054] ? netem_change+0x1505/0x2520 [ 62.610997][ T5054] ? netem_dump+0x1260/0x1260 [ 62.615670][ T5054] ? do_user_addr_fault+0x562/0x1020 [ 62.620955][ T5054] ? rcu_is_watching+0x12/0xb0 [ 62.625732][ T5054] ? exc_page_fault+0x5c/0xc0 [ 62.630403][ T5054] ? asm_exc_page_fault+0x26/0x30 [ 62.635425][ T5054] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.641487][ T5054] ? qdisc_create+0xca7/0x1440 [ 62.646254][ T5054] qdisc_create+0x6c0/0x1440 [ 62.650846][ T5054] ? tc_get_qdisc+0xdf0/0xdf0 [ 62.655522][ T5054] ? __nla_parse+0x40/0x50 [ 62.659938][ T5054] tc_modify_qdisc+0x4d5/0x1c30 [ 62.664796][ T5054] ? qdisc_create+0x1440/0x1440 [ 62.669647][ T5054] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.675636][ T5054] ? bpf_lsm_capable+0x9/0x10 [ 62.680304][ T5054] ? security_capable+0x92/0xc0 [ 62.685156][ T5054] ? qdisc_create+0x1440/0x1440 [ 62.690004][ T5054] rtnetlink_rcv_msg+0x3c7/0xe00 [ 62.694936][ T5054] ? rtnl_fill_vf+0x490/0x490 [ 62.699612][ T5054] netlink_rcv_skb+0x16b/0x440 [ 62.704373][ T5054] ? rtnl_fill_vf+0x490/0x490 [ 62.709042][ T5054] ? netlink_ack+0x1380/0x1380 [ 62.713803][ T5054] ? lock_sync+0x190/0x190 [ 62.718210][ T5054] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 62.724540][ T5054] ? netlink_deliver_tap+0x1a0/0xd00 [ 62.729822][ T5054] ? _copy_from_iter+0x2c1/0x10f0 [ 62.734844][ T5054] netlink_unicast+0x53b/0x810 [ 62.739609][ T5054] ? netlink_attachskb+0x870/0x870 [ 62.744716][ T5054] ? __phys_addr_symbol+0x30/0x70 [ 62.749738][ T5054] ? __check_object_size+0x322/0x730 [ 62.755035][ T5054] netlink_sendmsg+0x8b4/0xd70 [ 62.759801][ T5054] ? netlink_unicast+0x810/0x810 [ 62.764741][ T5054] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 62.770024][ T5054] ? netlink_unicast+0x810/0x810 [ 62.774960][ T5054] __sock_sendmsg+0xd5/0x180 [ 62.779559][ T5054] ____sys_sendmsg+0x6ac/0x940 [ 62.784326][ T5054] ? copy_msghdr_from_user+0x10b/0x160 [ 62.789777][ T5054] ? kernel_sendmsg+0x50/0x50 [ 62.794460][ T5054] ? finish_task_switch.isra.0+0x217/0xcb0 [ 62.800264][ T5054] ? __switch_to+0x749/0x1370 [ 62.804945][ T5054] ___sys_sendmsg+0x135/0x1d0 [ 62.809619][ T5054] ? do_recvmmsg+0x740/0x740 [ 62.814203][ T5054] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.820191][ T5054] ? lock_sync+0x190/0x190 [ 62.824598][ T5054] ? ptrace_stop.part.0+0x44a/0x930 [ 62.829796][ T5054] ? __fget_light+0x172/0x200 [ 62.834478][ T5054] __sys_sendmsg+0x117/0x1e0 [ 62.839063][ T5054] ? __sys_sendmsg_sock+0x30/0x30 [ 62.844079][ T5054] ? ptrace_notify+0xf1/0x130 [ 62.848757][ T5054] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.853951][ T5054] ? ptrace_notify+0xf1/0x130 [ 62.858632][ T5054] do_syscall_64+0xd0/0x250 [ 62.863138][ T5054] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.869026][ T5054] RIP: 0033:0x7f44aa2675a9 [ 62.873438][ T5054] 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 [ 62.893040][ T5054] RSP: 002b:00007fff14f96758 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.901445][ T5054] RAX: ffffffffffffffda RBX: 00007fff14f96928 RCX: 00007f44aa2675a9 [ 62.909410][ T5054] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 62.917370][ T5054] RBP: 00007f44aa2da610 R08: 000000000000000a R09: 00007fff14f96928 [ 62.925330][ T5054] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 62.933291][ T5054] R13: 00007fff14f96918 R14: 0000000000000001 R15: 0000000000000001 [ 62.941260][ T5054] [ 62.944267][ T5054] Modules linked in: [ 62.948152][ T5054] CR2: 0000000000000000 [ 62.952288][ T5054] ---[ end trace 0000000000000000 ]--- [ 62.957729][ T5054] RIP: 0010:0x0 [ 62.961182][ T5054] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.968531][ T5054] RSP: 0018:ffffc90003a37408 EFLAGS: 00010246 [ 62.974588][ T5054] RAX: dffffc0000000000 RBX: ffff88802187c000 RCX: ffffffff889a5187 [ 62.982551][ T5054] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88802187c000 [ 62.990512][ T5054] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.998476][ T5054] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b48000 [ 63.006439][ T5054] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 63.014403][ T5054] FS: 0000555556f26380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 63.023328][ T5054] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.029905][ T5054] CR2: ffffffffffffffd6 CR3: 0000000020cc3000 CR4: 00000000003506f0 [ 63.037868][ T5054] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.045832][ T5054] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.053795][ T5054] Kernel panic - not syncing: Fatal exception [ 63.060014][ T5054] Kernel Offset: disabled [ 63.064320][ T5054] Rebooting in 86400 seconds..