./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1610070860 <...> Warning: Permanently added '10.128.0.168' (ED25519) to the list of known hosts. execve("./syz-executor1610070860", ["./syz-executor1610070860"], 0x7ffe62e9d860 /* 10 vars */) = 0 brk(NULL) = 0x555557387000 brk(0x555557387d00) = 0x555557387d00 arch_prctl(ARCH_SET_FS, 0x555557387380) = 0 set_tid_address(0x555557387650) = 5061 set_robust_list(0x555557387660, 24) = 0 rseq(0x555557387ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1610070860", 4096) = 28 getrandom("\xf9\xc5\x6b\x70\xc4\xaf\xcc\x45", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557387d00 brk(0x5555573a8d00) = 0x5555573a8d00 brk(0x5555573a9000) = 0x5555573a9000 mprotect(0x7fbc8e3f2000, 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./strace-static-x86_64: Process 5062 attached , child_tidptr=0x555557387650) = 5062 [pid 5062] set_robust_list(0x555557387660, 24) = 0 [pid 5062] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5062] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5062] setsid() = 1 [pid 5062] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5062] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5062] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5062] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5062] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5062] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5062] unshare(CLONE_NEWNS) = 0 [pid 5062] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5062] unshare(CLONE_NEWIPC) = 0 [pid 5062] unshare(CLONE_NEWCGROUP) = 0 [pid 5062] unshare(CLONE_NEWUTS) = 0 [pid 5062] unshare(CLONE_SYSVSEM) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "16777216", 8) = 8 [pid 5062] close(3) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "536870912", 9) = 9 [pid 5062] close(3) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "1024", 4) = 4 [pid 5062] close(3) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "8192", 4) = 4 [pid 5062] close(3) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "1024", 4) = 4 [pid 5062] close(3) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "1024", 4) = 4 [pid 5062] close(3) = 0 [pid 5062] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5062] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5062] close(3) = 0 [pid 5062] getpid() = 1 [pid 5062] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 90.060117][ T5062] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 90.067994][ T5062] #PF: supervisor instruction fetch in kernel mode [ 90.074530][ T5062] #PF: error_code(0x0010) - not-present page [ 90.080512][ T5062] PGD 2d10f067 P4D 2d10f067 PUD 79a82067 PMD 0 [ 90.086779][ T5062] Oops: 0010 [#1] PREEMPT SMP KASAN [ 90.091988][ T5062] CPU: 0 PID: 5062 Comm: syz-executor161 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 90.101896][ T5062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 90.111969][ T5062] RIP: 0010:0x0 [ 90.115449][ T5062] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 90.122843][ T5062] RSP: 0018:ffffc90003a6f408 EFLAGS: 00010246 [ 90.128931][ T5062] RAX: dffffc0000000000 RBX: ffff888078c02000 RCX: ffffffff889a5187 [ 90.136912][ T5062] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888078c02000 [ 90.144891][ T5062] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 90.152867][ T5062] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff8880226b4000 [ 90.160850][ T5062] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 90.168862][ T5062] FS: 0000555557387380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 90.177810][ T5062] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 90.184498][ T5062] CR2: ffffffffffffffd6 CR3: 00000000799af000 CR4: 00000000003506f0 [ 90.192489][ T5062] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 90.200473][ T5062] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 90.208460][ T5062] Call Trace: [ 90.211746][ T5062] [ 90.214688][ T5062] ? show_regs+0x8e/0xa0 [ 90.218978][ T5062] ? __die+0x2c/0x80 [ 90.222898][ T5062] ? page_fault_oops+0x397/0xab0 [ 90.227860][ T5062] ? dump_pagetable+0x530/0x530 [ 90.232753][ T5062] ? netem_change+0x1505/0x2520 [ 90.237656][ T5062] ? netem_dump+0x1260/0x1260 [ 90.242356][ T5062] ? do_user_addr_fault+0x562/0x1020 [ 90.247667][ T5062] ? rcu_is_watching+0x12/0xb0 [ 90.252478][ T5062] ? exc_page_fault+0x5c/0xc0 [ 90.257176][ T5062] ? asm_exc_page_fault+0x26/0x30 [ 90.262269][ T5062] ? kasan_save_stack+0x33/0x50 [ 90.267328][ T5062] ? qdisc_create+0xca7/0x1440 [ 90.272137][ T5062] qdisc_create+0x6c0/0x1440 [ 90.276778][ T5062] ? tc_get_qdisc+0xdf0/0xdf0 [ 90.281487][ T5062] ? __nla_parse+0x40/0x50 [ 90.285937][ T5062] tc_modify_qdisc+0x4d5/0x1c30 [ 90.290832][ T5062] ? qdisc_create+0x1440/0x1440 [ 90.295716][ T5062] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 90.301834][ T5062] ? bpf_lsm_capable+0x9/0x10 [ 90.306533][ T5062] ? security_capable+0x92/0xc0 [ 90.311433][ T5062] ? qdisc_create+0x1440/0x1440 [ 90.316319][ T5062] rtnetlink_rcv_msg+0x3c7/0xe00 [ 90.321281][ T5062] ? rtnl_fill_vf+0x490/0x490 [ 90.325991][ T5062] netlink_rcv_skb+0x16b/0x440 [ 90.330784][ T5062] ? rtnl_fill_vf+0x490/0x490 [ 90.335480][ T5062] ? netlink_ack+0x1380/0x1380 [ 90.340291][ T5062] ? lock_sync+0x190/0x190 [ 90.344736][ T5062] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 90.351100][ T5062] ? netlink_deliver_tap+0x1a0/0xd00 [ 90.356417][ T5062] ? _copy_from_iter+0x2c1/0x10f0 [ 90.361479][ T5062] netlink_unicast+0x53b/0x810 [ 90.366362][ T5062] ? netlink_attachskb+0x870/0x870 [ 90.371501][ T5062] ? __phys_addr_symbol+0x30/0x70 [ 90.376557][ T5062] ? __check_object_size+0x322/0x730 [ 90.381881][ T5062] netlink_sendmsg+0x8b4/0xd70 [ 90.386673][ T5062] ? netlink_unicast+0x810/0x810 [ 90.391651][ T5062] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 90.396974][ T5062] ? netlink_unicast+0x810/0x810 [ 90.401977][ T5062] __sock_sendmsg+0xd5/0x180 [ 90.406615][ T5062] ____sys_sendmsg+0x6ac/0x940 [ 90.411418][ T5062] ? copy_msghdr_from_user+0x10b/0x160 [ 90.416944][ T5062] ? kernel_sendmsg+0x50/0x50 [ 90.421680][ T5062] ? finish_task_switch.isra.0+0x217/0xcb0 [ 90.427526][ T5062] ? __switch_to+0x749/0x1370 [ 90.432237][ T5062] ___sys_sendmsg+0x135/0x1d0 [ 90.436941][ T5062] ? do_recvmmsg+0x740/0x740 [ 90.441565][ T5062] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 90.447591][ T5062] ? lock_sync+0x190/0x190 [ 90.452041][ T5062] ? ptrace_stop.part.0+0x44a/0x930 [ 90.457274][ T5062] ? __fget_light+0x172/0x200 [ 90.462049][ T5062] __sys_sendmsg+0x117/0x1e0 [ 90.466713][ T5062] ? __sys_sendmsg_sock+0x30/0x30 [ 90.471782][ T5062] ? ptrace_notify+0xf1/0x130 [ 90.476533][ T5062] ? _raw_spin_unlock_irq+0x2e/0x50 [ 90.481762][ T5062] ? ptrace_notify+0xf1/0x130 [ 90.486474][ T5062] do_syscall_64+0xd0/0x250 [ 90.491023][ T5062] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 90.496942][ T5062] RIP: 0033:0x7fbc8e37e8b9 [ 90.501385][ T5062] 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 [ 90.521025][ T5062] RSP: 002b:00007ffd241d38d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 90.529471][ T5062] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbc8e37e8b9 [ 90.538007][ T5062] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 90.546090][ T5062] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd241d3950 [ 90.554255][ T5062] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 90.562526][ T5062] R13: 00007ffd241d3ad8 R14: 0000000000000001 R15: 0000000000000001 [ 90.570531][ T5062] [ 90.573560][ T5062] Modules linked in: [ 90.577471][ T5062] CR2: 0000000000000000 [ 90.581726][ T5062] ---[ end trace 0000000000000000 ]--- [ 90.587222][ T5062] RIP: 0010:0x0 [ 90.590727][ T5062] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 90.598097][ T5062] RSP: 0018:ffffc90003a6f408 EFLAGS: 00010246 [ 90.604182][ T5062] RAX: dffffc0000000000 RBX: ffff888078c02000 RCX: ffffffff889a5187 [ 90.612186][ T5062] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888078c02000 [ 90.620179][ T5062] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 90.628165][ T5062] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff8880226b4000 [ 90.636149][ T5062] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 90.644158][ T5062] FS: 0000555557387380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 90.653212][ T5062] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 90.659826][ T5062] CR2: ffffffffffffffd6 CR3: 00000000799af000 CR4: 00000000003506f0 [ 90.667824][ T5062] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 90.675898][ T5062] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 90.683974][ T5062] Kernel panic - not syncing: Fatal exception [ 90.690307][ T5062] Kernel Offset: disabled [ 90.694635][ T5062] Rebooting in 86400 seconds..