./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3840597388 <...> Warning: Permanently added '10.128.1.107' (ED25519) to the list of known hosts. execve("./syz-executor3840597388", ["./syz-executor3840597388"], 0x7ffc06f6ccb0 /* 10 vars */) = 0 brk(NULL) = 0x5555565ce000 brk(0x5555565ced00) = 0x5555565ced00 arch_prctl(ARCH_SET_FS, 0x5555565ce380) = 0 set_tid_address(0x5555565ce650) = 5064 set_robust_list(0x5555565ce660, 24) = 0 rseq(0x5555565ceca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3840597388", 4096) = 28 getrandom("\xdf\xd0\x83\xe4\x63\xfc\xd0\xb4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555565ced00 brk(0x5555565efd00) = 0x5555565efd00 brk(0x5555565f0000) = 0x5555565f0000 mprotect(0x7fabd2bc4000, 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 [ 90.676228][ T5064] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 90.684085][ T5064] #PF: supervisor instruction fetch in kernel mode [ 90.690584][ T5064] #PF: error_code(0x0010) - not-present page [ 90.696562][ T5064] PGD 79c7e067 P4D 79c7e067 PUD 7b6d0067 PMD 0 [ 90.702833][ T5064] Oops: 0010 [#1] PREEMPT SMP KASAN [ 90.708040][ T5064] CPU: 0 PID: 5064 Comm: syz-executor384 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 90.718143][ T5064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 90.728243][ T5064] RIP: 0010:0x0 [ 90.731720][ T5064] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 90.739085][ T5064] RSP: 0018:ffffc90003c4f408 EFLAGS: 00010246 [ 90.745154][ T5064] RAX: dffffc0000000000 RBX: ffff888019ed4000 RCX: ffffffff889a5187 [ 90.753127][ T5064] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888019ed4000 [ 90.761117][ T5064] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 90.769113][ T5064] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b18000 [ 90.777087][ T5064] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 90.785058][ T5064] FS: 00005555565ce380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 90.794007][ T5064] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 90.800596][ T5064] CR2: ffffffffffffffd6 CR3: 000000007b3a3000 CR4: 00000000003506f0 [ 90.808576][ T5064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 90.816555][ T5064] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 90.824526][ T5064] Call Trace: [ 90.827805][ T5064] [ 90.830741][ T5064] ? show_regs+0x8e/0xa0 [ 90.835051][ T5064] ? __die+0x2c/0x80 [ 90.838968][ T5064] ? page_fault_oops+0x397/0xab0 [ 90.843943][ T5064] ? dump_pagetable+0x530/0x530 [ 90.848807][ T5064] ? netem_change+0x1505/0x2520 [ 90.853767][ T5064] ? netem_dump+0x1260/0x1260 [ 90.858548][ T5064] ? do_user_addr_fault+0x562/0x1020 [ 90.863842][ T5064] ? rcu_is_watching+0x12/0xb0 [ 90.868624][ T5064] ? exc_page_fault+0x5c/0xc0 [ 90.873311][ T5064] ? asm_exc_page_fault+0x26/0x30 [ 90.878435][ T5064] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 90.884533][ T5064] ? qdisc_create+0xca7/0x1440 [ 90.889315][ T5064] qdisc_create+0x6c0/0x1440 [ 90.893923][ T5064] ? tc_get_qdisc+0xdf0/0xdf0 [ 90.898617][ T5064] ? __nla_parse+0x40/0x50 [ 90.903047][ T5064] tc_modify_qdisc+0x4d5/0x1c30 [ 90.907918][ T5064] ? qdisc_create+0x1440/0x1440 [ 90.912784][ T5064] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 90.918797][ T5064] ? bpf_lsm_capable+0x9/0x10 [ 90.923484][ T5064] ? security_capable+0x92/0xc0 [ 90.928355][ T5064] ? qdisc_create+0x1440/0x1440 [ 90.933224][ T5064] rtnetlink_rcv_msg+0x3c7/0xe00 [ 90.938178][ T5064] ? rtnl_fill_vf+0x490/0x490 [ 90.942867][ T5064] netlink_rcv_skb+0x16b/0x440 [ 90.947661][ T5064] ? rtnl_fill_vf+0x490/0x490 [ 90.952343][ T5064] ? netlink_ack+0x1380/0x1380 [ 90.957117][ T5064] ? lock_sync+0x190/0x190 [ 90.961538][ T5064] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 90.967887][ T5064] ? netlink_deliver_tap+0x1a0/0xd00 [ 90.973184][ T5064] ? _copy_from_iter+0x2c1/0x10f0 [ 90.978223][ T5064] netlink_unicast+0x53b/0x810 [ 90.983002][ T5064] ? netlink_attachskb+0x870/0x870 [ 90.988153][ T5064] ? __phys_addr_symbol+0x30/0x70 [ 90.993195][ T5064] ? __check_object_size+0x322/0x730 [ 90.998500][ T5064] netlink_sendmsg+0x8b4/0xd70 [ 91.003295][ T5064] ? netlink_unicast+0x810/0x810 [ 91.008262][ T5064] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 91.013565][ T5064] ? netlink_unicast+0x810/0x810 [ 91.018704][ T5064] __sock_sendmsg+0xd5/0x180 [ 91.023334][ T5064] ____sys_sendmsg+0x6ac/0x940 [ 91.028135][ T5064] ? copy_msghdr_from_user+0x10b/0x160 [ 91.033603][ T5064] ? kernel_sendmsg+0x50/0x50 [ 91.038306][ T5064] ? finish_task_switch.isra.0+0x217/0xcb0 [ 91.044130][ T5064] ? __switch_to+0x749/0x1370 [ 91.048827][ T5064] ___sys_sendmsg+0x135/0x1d0 [ 91.053515][ T5064] ? do_recvmmsg+0x740/0x740 [ 91.058115][ T5064] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 91.064125][ T5064] ? lock_sync+0x190/0x190 [ 91.068636][ T5064] ? ptrace_stop.part.0+0x44a/0x930 [ 91.073854][ T5064] ? __fget_light+0x172/0x200 [ 91.078553][ T5064] __sys_sendmsg+0x117/0x1e0 [ 91.083153][ T5064] ? __sys_sendmsg_sock+0x30/0x30 [ 91.088187][ T5064] ? ptrace_notify+0xf1/0x130 [ 91.092884][ T5064] ? _raw_spin_unlock_irq+0x2e/0x50 [ 91.098119][ T5064] ? ptrace_notify+0xf1/0x130 [ 91.102828][ T5064] do_syscall_64+0xd0/0x250 [ 91.107361][ T5064] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 91.113273][ T5064] RIP: 0033:0x7fabd2b515a9 [ 91.117694][ T5064] 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 [ 91.137318][ T5064] RSP: 002b:00007ffe6cf7e1e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 91.145741][ T5064] RAX: ffffffffffffffda RBX: 00007ffe6cf7e3b8 RCX: 00007fabd2b515a9 [ 91.153718][ T5064] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 91.161693][ T5064] RBP: 00007fabd2bc4610 R08: 000000000000000a R09: 00007ffe6cf7e3b8 [ 91.169670][ T5064] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 91.177646][ T5064] R13: 00007ffe6cf7e3a8 R14: 0000000000000001 R15: 0000000000000001 [ 91.185629][ T5064] [ 91.188649][ T5064] Modules linked in: [ 91.192543][ T5064] CR2: 0000000000000000 [ 91.196740][ T5064] ---[ end trace 0000000000000000 ]--- [ 91.202191][ T5064] RIP: 0010:0x0 [ 91.205658][ T5064] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 91.213017][ T5064] RSP: 0018:ffffc90003c4f408 EFLAGS: 00010246 [ 91.219088][ T5064] RAX: dffffc0000000000 RBX: ffff888019ed4000 RCX: ffffffff889a5187 [ 91.227096][ T5064] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888019ed4000 [ 91.235261][ T5064] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 91.243240][ T5064] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888013b18000 [ 91.251232][ T5064] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 91.259214][ T5064] FS: 00005555565ce380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 91.268159][ T5064] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.274767][ T5064] CR2: ffffffffffffffd6 CR3: 000000007b3a3000 CR4: 00000000003506f0 [ 91.282749][ T5064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.290722][ T5064] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.298699][ T5064] Kernel panic - not syncing: Fatal exception [ 91.305088][ T5064] Kernel Offset: disabled [ 91.309411][ T5064] Rebooting in 86400 seconds..