./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3538018400 <...> Warning: Permanently added '10.128.1.166' (ED25519) to the list of known hosts. execve("./syz-executor3538018400", ["./syz-executor3538018400"], 0x7fff6fb477c0 /* 10 vars */) = 0 brk(NULL) = 0x5555559f7000 brk(0x5555559f7d00) = 0x5555559f7d00 arch_prctl(ARCH_SET_FS, 0x5555559f7380) = 0 set_tid_address(0x5555559f7650) = 5058 set_robust_list(0x5555559f7660, 24) = 0 rseq(0x5555559f7ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3538018400", 4096) = 28 getrandom("\xe7\x2e\xb0\xda\x80\xd8\x36\xd6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555559f7d00 brk(0x555555a18d00) = 0x555555a18d00 brk(0x555555a19000) = 0x555555a19000 mprotect(0x7fdd9b69c000, 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=0x5555559f7650) = 5059 ./strace-static-x86_64: Process 5059 attached [pid 5059] set_robust_list(0x5555559f7660, 24) = 0 [pid 5059] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5059] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5059] setsid() = 1 [pid 5059] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5059] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5059] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5059] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5059] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5059] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5059] unshare(CLONE_NEWNS) = 0 [pid 5059] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5059] unshare(CLONE_NEWIPC) = 0 [pid 5059] unshare(CLONE_NEWCGROUP) = 0 [pid 5059] unshare(CLONE_NEWUTS) = 0 [pid 5059] unshare(CLONE_SYSVSEM) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "16777216", 8) = 8 [pid 5059] close(3) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "536870912", 9) = 9 [pid 5059] close(3) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "1024", 4) = 4 [pid 5059] close(3) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "8192", 4) = 4 [pid 5059] close(3) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "1024", 4) = 4 [pid 5059] close(3) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "1024", 4) = 4 [pid 5059] close(3) = 0 [pid 5059] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5059] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5059] close(3) = 0 [pid 5059] getpid() = 1 [pid 5059] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 76.841441][ T5059] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 76.849281][ T5059] #PF: supervisor instruction fetch in kernel mode [ 76.855759][ T5059] #PF: error_code(0x0010) - not-present page [ 76.861710][ T5059] PGD 7b6fc067 P4D 7b6fc067 PUD 7b6fd067 PMD 0 [ 76.867941][ T5059] Oops: 0010 [#1] PREEMPT SMP KASAN [ 76.873118][ T5059] CPU: 0 PID: 5059 Comm: syz-executor353 Not tainted 6.7.0-rc6-syzkaller-01658-gc2b2ee36250d #0 [ 76.883508][ T5059] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 76.893542][ T5059] RIP: 0010:0x0 [ 76.896989][ T5059] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 76.904337][ T5059] RSP: 0018:ffffc90003d5f418 EFLAGS: 00010246 [ 76.910403][ T5059] RAX: dffffc0000000000 RBX: ffff888028206800 RCX: ffffffff888dbd56 [ 76.918379][ T5059] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888028206800 [ 76.926346][ T5059] RBP: ffffffff8f19afa0 R08: 0000000000000001 R09: 0000000000000000 [ 76.934322][ T5059] R10: 0000000000000001 R11: 0000000000000000 R12: ffff888025ece000 [ 76.942305][ T5059] R13: ffffffff8bed7360 R14: 0000000000000001 R15: ffffffff8f19afa0 [ 76.950279][ T5059] FS: 00005555559f7380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 76.959306][ T5059] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.965890][ T5059] CR2: ffffffffffffffd6 CR3: 0000000044c2a000 CR4: 00000000003506f0 [ 76.973865][ T5059] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.981840][ T5059] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.989809][ T5059] Call Trace: [ 76.993084][ T5059] [ 76.996024][ T5059] ? show_regs+0x8f/0xa0 [ 77.000307][ T5059] ? __die+0x2c/0x80 [ 77.004224][ T5059] ? page_fault_oops+0x398/0xab0 [ 77.009168][ T5059] ? dump_pagetable+0x530/0x530 [ 77.014029][ T5059] ? tbf_dequeue+0xdb0/0xdb0 [ 77.018641][ T5059] ? print_usage_bug.part.0+0x550/0x550 [ 77.024206][ T5059] ? find_held_lock+0x2d/0x110 [ 77.028976][ T5059] ? do_user_addr_fault+0x53d/0x1000 [ 77.034261][ T5059] ? irqentry_enter+0x2d/0x50 [ 77.038947][ T5059] ? rcu_is_watching+0x12/0xb0 [ 77.043714][ T5059] ? exc_page_fault+0x5d/0xc0 [ 77.048390][ T5059] ? asm_exc_page_fault+0x26/0x30 [ 77.053419][ T5059] ? qdisc_create+0xc96/0x1430 [ 77.058187][ T5059] qdisc_create+0x6b6/0x1430 [ 77.062789][ T5059] ? lock_acquire+0x1ae/0x520 [ 77.067472][ T5059] ? tc_get_qdisc+0xc20/0xc20 [ 77.072157][ T5059] tc_modify_qdisc+0x4d5/0x1c30 [ 77.077014][ T5059] ? qdisc_create+0x1430/0x1430 [ 77.081870][ T5059] ? bpf_lsm_capable+0x9/0x10 [ 77.086571][ T5059] ? qdisc_create+0x1430/0x1430 [ 77.091425][ T5059] rtnetlink_rcv_msg+0x3c7/0xe00 [ 77.096367][ T5059] ? rtnl_fill_vf+0x490/0x490 [ 77.101048][ T5059] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 77.107038][ T5059] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 77.113036][ T5059] netlink_rcv_skb+0x16b/0x440 [ 77.117798][ T5059] ? rtnl_fill_vf+0x490/0x490 [ 77.122477][ T5059] ? netlink_ack+0x1380/0x1380 [ 77.127243][ T5059] ? lock_sync+0x190/0x190 [ 77.131674][ T5059] ? netlink_deliver_tap+0x1a0/0xd00 [ 77.136954][ T5059] ? _copy_from_iter+0x2c1/0x10f0 [ 77.141988][ T5059] netlink_unicast+0x53b/0x810 [ 77.146755][ T5059] ? netlink_attachskb+0x880/0x880 [ 77.151861][ T5059] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 77.157755][ T5059] ? __phys_addr_symbol+0x30/0x70 [ 77.162781][ T5059] ? __check_object_size+0x323/0x730 [ 77.168068][ T5059] netlink_sendmsg+0x8b7/0xd70 [ 77.172831][ T5059] ? netlink_unicast+0x810/0x810 [ 77.177768][ T5059] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 77.183058][ T5059] ? netlink_unicast+0x810/0x810 [ 77.188008][ T5059] __sock_sendmsg+0xd5/0x180 [ 77.192624][ T5059] ____sys_sendmsg+0x6ac/0x940 [ 77.197398][ T5059] ? copy_msghdr_from_user+0x10b/0x160 [ 77.202863][ T5059] ? kernel_sendmsg+0x50/0x50 [ 77.207542][ T5059] ? hlock_class+0x4e/0x130 [ 77.212058][ T5059] ___sys_sendmsg+0x135/0x1d0 [ 77.216746][ T5059] ? do_recvmmsg+0x740/0x740 [ 77.221359][ T5059] ? recalc_sigpending_tsk+0x187/0x1d0 [ 77.226822][ T5059] ? __fget_light+0x1fc/0x260 [ 77.231507][ T5059] __sys_sendmsg+0x117/0x1e0 [ 77.236109][ T5059] ? __sys_sendmsg_sock+0x30/0x30 [ 77.241147][ T5059] ? ptrace_notify+0xf4/0x130 [ 77.245822][ T5059] ? syscall_trace_enter.constprop.0+0xaf/0x1e0 [ 77.252070][ T5059] do_syscall_64+0x40/0x110 [ 77.256583][ T5059] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 77.262482][ T5059] RIP: 0033:0x7fdd9b629779 [ 77.266893][ T5059] 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 [ 77.286582][ T5059] RSP: 002b:00007ffdc2a13b68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.294991][ T5059] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdd9b629779 [ 77.302958][ T5059] RDX: 0000000000000000 RSI: 0000000020001400 RDI: 0000000000000003 [ 77.311018][ T5059] RBP: 00007ffdc2a13b80 R08: 00007ffdc2a13be0 R09: 00007ffdc2a13be0 [ 77.318984][ T5059] R10: 00007ffdc2a13be0 R11: 0000000000000246 R12: 00007fdd9b69c5f0 [ 77.326951][ T5059] R13: 00007ffdc2a13d68 R14: 0000000000000001 R15: 0000000000000001 [ 77.334926][ T5059] [ 77.337934][ T5059] Modules linked in: [ 77.341818][ T5059] CR2: 0000000000000000 [ 77.345958][ T5059] ---[ end trace 0000000000000000 ]--- [ 77.351404][ T5059] RIP: 0010:0x0 [ 77.354865][ T5059] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 77.362220][ T5059] RSP: 0018:ffffc90003d5f418 EFLAGS: 00010246 [ 77.368280][ T5059] RAX: dffffc0000000000 RBX: ffff888028206800 RCX: ffffffff888dbd56 [ 77.376245][ T5059] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888028206800 [ 77.384215][ T5059] RBP: ffffffff8f19afa0 R08: 0000000000000001 R09: 0000000000000000 [ 77.392185][ T5059] R10: 0000000000000001 R11: 0000000000000000 R12: ffff888025ece000 [ 77.400153][ T5059] R13: ffffffff8bed7360 R14: 0000000000000001 R15: ffffffff8f19afa0 [ 77.408118][ T5059] FS: 00005555559f7380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 77.417045][ T5059] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.423623][ T5059] CR2: ffffffffffffffd6 CR3: 0000000044c2a000 CR4: 00000000003506f0 [ 77.431595][ T5059] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.439561][ T5059] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.447533][ T5059] Kernel panic - not syncing: Fatal exception [ 77.453760][ T5059] Kernel Offset: disabled [ 77.458065][ T5059] Rebooting in 86400 seconds..