./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1593243563 <...> Warning: Permanently added '10.128.0.149' (ED25519) to the list of known hosts. execve("./syz-executor1593243563", ["./syz-executor1593243563"], 0x7fff6fbf7b60 /* 10 vars */) = 0 brk(NULL) = 0x555555bda000 brk(0x555555bdad00) = 0x555555bdad00 arch_prctl(ARCH_SET_FS, 0x555555bda380) = 0 set_tid_address(0x555555bda650) = 5064 set_robust_list(0x555555bda660, 24) = 0 rseq(0x555555bdaca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1593243563", 4096) = 28 getrandom("\x16\x01\xbe\xc7\xfc\xb0\x5d\x6e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555bdad00 brk(0x555555bfbd00) = 0x555555bfbd00 brk(0x555555bfc000) = 0x555555bfc000 mprotect(0x7f7c33388000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555bda650) = 5065 ./strace-static-x86_64: Process 5065 attached [pid 5065] set_robust_list(0x555555bda660, 24) = 0 [pid 5065] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5065] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5065] setsid() = 1 [pid 5065] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5065] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5065] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5065] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5065] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5065] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5065] unshare(CLONE_NEWNS) = 0 [pid 5065] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5065] unshare(CLONE_NEWIPC) = 0 [pid 5065] unshare(CLONE_NEWCGROUP) = 0 [pid 5065] unshare(CLONE_NEWUTS) = 0 [pid 5065] unshare(CLONE_SYSVSEM) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "16777216", 8) = 8 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "536870912", 9) = 9 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "1024", 4) = 4 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "8192", 4) = 4 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "1024", 4) = 4 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "1024", 4) = 4 [pid 5065] close(3) = 0 [pid 5065] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5065] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5065] close(3) = 0 [pid 5065] getpid() = 1 [pid 5065] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 61.096497][ T5065] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 61.104321][ T5065] #PF: supervisor instruction fetch in kernel mode [ 61.110804][ T5065] #PF: error_code(0x0010) - not-present page [ 61.116758][ T5065] PGD 530b7067 P4D 530b7067 PUD 7b250067 PMD 0 [ 61.122988][ T5065] Oops: 0010 [#1] PREEMPT SMP KASAN [ 61.128163][ T5065] CPU: 1 PID: 5065 Comm: syz-executor159 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 61.138032][ T5065] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 61.148069][ T5065] RIP: 0010:0x0 [ 61.151518][ T5065] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 61.158874][ T5065] RSP: 0018:ffffc90003a3f408 EFLAGS: 00010246 [ 61.164934][ T5065] RAX: dffffc0000000000 RBX: ffff888029256000 RCX: ffffffff889a5187 [ 61.172892][ T5065] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888029256000 [ 61.180847][ T5065] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 61.188797][ T5065] R10: 0000000000000001 R11: 0000000024d8072e R12: ffff88801ef4c000 [ 61.196748][ T5065] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 61.204697][ T5065] FS: 0000555555bda380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 61.213613][ T5065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.220263][ T5065] CR2: ffffffffffffffd6 CR3: 00000000790d8000 CR4: 00000000003506f0 [ 61.228215][ T5065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.236166][ T5065] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.244118][ T5065] Call Trace: [ 61.247380][ T5065] [ 61.250307][ T5065] ? show_regs+0x8e/0xa0 [ 61.254548][ T5065] ? __die+0x2c/0x80 [ 61.258427][ T5065] ? page_fault_oops+0x397/0xab0 [ 61.263349][ T5065] ? dump_pagetable+0x530/0x530 [ 61.268181][ T5065] ? netem_change+0x1505/0x2520 [ 61.273020][ T5065] ? netem_dump+0x1260/0x1260 [ 61.277677][ T5065] ? do_user_addr_fault+0x562/0x1020 [ 61.282944][ T5065] ? rcu_is_watching+0x12/0xb0 [ 61.287693][ T5065] ? exc_page_fault+0x5c/0xc0 [ 61.292352][ T5065] ? asm_exc_page_fault+0x26/0x30 [ 61.297358][ T5065] ? qdisc_create+0xca7/0x1440 [ 61.302112][ T5065] qdisc_create+0x6c0/0x1440 [ 61.306688][ T5065] ? tc_get_qdisc+0xdf0/0xdf0 [ 61.311350][ T5065] ? __nla_parse+0x40/0x50 [ 61.315753][ T5065] tc_modify_qdisc+0x4d5/0x1c30 [ 61.320605][ T5065] ? qdisc_create+0x1440/0x1440 [ 61.325460][ T5065] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 61.331436][ T5065] ? bpf_lsm_capable+0x9/0x10 [ 61.336118][ T5065] ? security_capable+0x92/0xc0 [ 61.340960][ T5065] ? qdisc_create+0x1440/0x1440 [ 61.345799][ T5065] rtnetlink_rcv_msg+0x3c7/0xe00 [ 61.350735][ T5065] ? rtnl_fill_vf+0x490/0x490 [ 61.355398][ T5065] netlink_rcv_skb+0x16b/0x440 [ 61.360155][ T5065] ? rtnl_fill_vf+0x490/0x490 [ 61.364818][ T5065] ? netlink_ack+0x1380/0x1380 [ 61.369578][ T5065] ? lock_sync+0x190/0x190 [ 61.373985][ T5065] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 61.380303][ T5065] ? netlink_deliver_tap+0x1a0/0xd00 [ 61.385572][ T5065] ? _copy_from_iter+0x2c1/0x10f0 [ 61.390587][ T5065] netlink_unicast+0x53b/0x810 [ 61.395343][ T5065] ? netlink_attachskb+0x870/0x870 [ 61.400456][ T5065] ? __phys_addr_symbol+0x30/0x70 [ 61.405482][ T5065] ? __check_object_size+0x322/0x730 [ 61.410761][ T5065] netlink_sendmsg+0x8b4/0xd70 [ 61.415524][ T5065] ? netlink_unicast+0x810/0x810 [ 61.420451][ T5065] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 61.425729][ T5065] ? netlink_unicast+0x810/0x810 [ 61.430673][ T5065] __sock_sendmsg+0xd5/0x180 [ 61.435271][ T5065] ____sys_sendmsg+0x6ac/0x940 [ 61.440025][ T5065] ? copy_msghdr_from_user+0x10b/0x160 [ 61.445987][ T5065] ? kernel_sendmsg+0x50/0x50 [ 61.450654][ T5065] ? finish_task_switch.isra.0+0x217/0xcb0 [ 61.456467][ T5065] ? __switch_to+0x749/0x1370 [ 61.461130][ T5065] ___sys_sendmsg+0x135/0x1d0 [ 61.465788][ T5065] ? do_recvmmsg+0x740/0x740 [ 61.470369][ T5065] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 61.476348][ T5065] ? lock_sync+0x190/0x190 [ 61.480743][ T5065] ? ptrace_stop.part.0+0x44a/0x930 [ 61.485929][ T5065] ? __fget_light+0x172/0x200 [ 61.490592][ T5065] __sys_sendmsg+0x117/0x1e0 [ 61.495163][ T5065] ? __sys_sendmsg_sock+0x30/0x30 [ 61.500164][ T5065] ? ptrace_notify+0xf1/0x130 [ 61.504825][ T5065] ? _raw_spin_unlock_irq+0x2e/0x50 [ 61.510008][ T5065] ? ptrace_notify+0xf1/0x130 [ 61.514667][ T5065] do_syscall_64+0xd0/0x250 [ 61.519173][ T5065] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 61.525062][ T5065] RIP: 0033:0x7f7c333148b9 [ 61.529455][ T5065] Code: 48 83 c4 28 c3 e8 27 18 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 [ 61.549214][ T5065] RSP: 002b:00007ffc388100f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 61.557624][ T5065] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7c333148b9 [ 61.565574][ T5065] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 61.573522][ T5065] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc38810170 [ 61.581470][ T5065] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 61.589421][ T5065] R13: 00007ffc388102f8 R14: 0000000000000001 R15: 0000000000000001 [ 61.597416][ T5065] [ 61.600456][ T5065] Modules linked in: [ 61.604328][ T5065] CR2: 0000000000000000 [ 61.608461][ T5065] ---[ end trace 0000000000000000 ]--- [ 61.613891][ T5065] RIP: 0010:0x0 [ 61.617338][ T5065] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 61.624681][ T5065] RSP: 0018:ffffc90003a3f408 EFLAGS: 00010246 [ 61.630728][ T5065] RAX: dffffc0000000000 RBX: ffff888029256000 RCX: ffffffff889a5187 [ 61.638684][ T5065] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888029256000 [ 61.646638][ T5065] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 61.654589][ T5065] R10: 0000000000000001 R11: 0000000024d8072e R12: ffff88801ef4c000 [ 61.662540][ T5065] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 61.670502][ T5065] FS: 0000555555bda380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 61.679420][ T5065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.685991][ T5065] CR2: ffffffffffffffd6 CR3: 00000000790d8000 CR4: 00000000003506f0 [ 61.693970][ T5065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.701920][ T5065] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.709885][ T5065] Kernel panic - not syncing: Fatal exception [ 61.716119][ T5065] Kernel Offset: disabled [ 61.720425][ T5065] Rebooting in 86400 seconds..