./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4157885596 <...> Warning: Permanently added '10.128.0.108' (ED25519) to the list of known hosts. execve("./syz-executor4157885596", ["./syz-executor4157885596"], 0x7ffe7afcfc40 /* 10 vars */) = 0 brk(NULL) = 0x555556c1c000 brk(0x555556c1cd00) = 0x555556c1cd00 arch_prctl(ARCH_SET_FS, 0x555556c1c380) = 0 set_tid_address(0x555556c1c650) = 5055 set_robust_list(0x555556c1c660, 24) = 0 rseq(0x555556c1cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4157885596", 4096) = 28 getrandom("\x81\xdd\x7f\xa0\x3a\x42\xb2\x87", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556c1cd00 brk(0x555556c3dd00) = 0x555556c3dd00 brk(0x555556c3e000) = 0x555556c3e000 mprotect(0x7f38e8668000, 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 5056 attached , child_tidptr=0x555556c1c650) = 5056 [pid 5056] set_robust_list(0x555556c1c660, 24) = 0 [pid 5056] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5056] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5056] setsid() = 1 [pid 5056] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5056] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5056] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5056] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5056] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5056] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5056] unshare(CLONE_NEWNS) = 0 [pid 5056] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5056] unshare(CLONE_NEWIPC) = 0 [pid 5056] unshare(CLONE_NEWCGROUP) = 0 [pid 5056] unshare(CLONE_NEWUTS) = 0 [pid 5056] unshare(CLONE_SYSVSEM) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "16777216", 8) = 8 [pid 5056] close(3) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "536870912", 9) = 9 [pid 5056] close(3) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "1024", 4) = 4 [pid 5056] close(3) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "8192", 4) = 4 [pid 5056] close(3) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "1024", 4) = 4 [pid 5056] close(3) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "1024", 4) = 4 [pid 5056] close(3) = 0 [pid 5056] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5056] close(3) = 0 [pid 5056] getpid() = 1 [pid 5056] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 61.642978][ T5056] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 61.650813][ T5056] #PF: supervisor instruction fetch in kernel mode [ 61.657293][ T5056] #PF: error_code(0x0010) - not-present page [ 61.663251][ T5056] PGD 208c3067 P4D 208c3067 PUD 208c4067 PMD 0 [ 61.669486][ T5056] Oops: 0010 [#1] PREEMPT SMP KASAN [ 61.674668][ T5056] CPU: 0 PID: 5056 Comm: syz-executor415 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 61.684555][ T5056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 61.694598][ T5056] RIP: 0010:0x0 [ 61.698054][ T5056] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 61.705509][ T5056] RSP: 0018:ffffc90003a3f408 EFLAGS: 00010246 [ 61.711587][ T5056] RAX: dffffc0000000000 RBX: ffff88802dc98000 RCX: ffffffff889a5187 [ 61.719561][ T5056] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88802dc98000 [ 61.727530][ T5056] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 61.735580][ T5056] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff88807d196000 [ 61.743716][ T5056] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 61.751689][ T5056] FS: 0000555556c1c380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 61.760616][ T5056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.767200][ T5056] CR2: ffffffffffffffd6 CR3: 0000000022ab1000 CR4: 00000000003506f0 [ 61.775188][ T5056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.783173][ T5056] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.791149][ T5056] Call Trace: [ 61.794430][ T5056] [ 61.797358][ T5056] ? show_regs+0x8e/0xa0 [ 61.801624][ T5056] ? __die+0x2c/0x80 [ 61.805550][ T5056] ? page_fault_oops+0x397/0xab0 [ 61.810488][ T5056] ? dump_pagetable+0x530/0x530 [ 61.815335][ T5056] ? netem_change+0x1505/0x2520 [ 61.820190][ T5056] ? netem_dump+0x1260/0x1260 [ 61.824864][ T5056] ? do_user_addr_fault+0x562/0x1020 [ 61.830148][ T5056] ? rcu_is_watching+0x12/0xb0 [ 61.834910][ T5056] ? exc_page_fault+0x5c/0xc0 [ 61.839584][ T5056] ? asm_exc_page_fault+0x26/0x30 [ 61.844603][ T5056] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 61.850667][ T5056] ? qdisc_create+0xca7/0x1440 [ 61.855440][ T5056] qdisc_create+0x6c0/0x1440 [ 61.860034][ T5056] ? tc_get_qdisc+0xdf0/0xdf0 [ 61.864714][ T5056] ? __nla_parse+0x40/0x50 [ 61.869131][ T5056] tc_modify_qdisc+0x4d5/0x1c30 [ 61.873986][ T5056] ? qdisc_create+0x1440/0x1440 [ 61.878835][ T5056] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 61.884824][ T5056] ? bpf_lsm_capable+0x9/0x10 [ 61.889613][ T5056] ? security_capable+0x92/0xc0 [ 61.894567][ T5056] ? qdisc_create+0x1440/0x1440 [ 61.899428][ T5056] rtnetlink_rcv_msg+0x3c7/0xe00 [ 61.904459][ T5056] ? rtnl_fill_vf+0x490/0x490 [ 61.909138][ T5056] netlink_rcv_skb+0x16b/0x440 [ 61.913903][ T5056] ? rtnl_fill_vf+0x490/0x490 [ 61.918578][ T5056] ? netlink_ack+0x1380/0x1380 [ 61.923338][ T5056] ? lock_sync+0x190/0x190 [ 61.927746][ T5056] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 61.934082][ T5056] ? netlink_deliver_tap+0x1a0/0xd00 [ 61.939366][ T5056] ? _copy_from_iter+0x2c1/0x10f0 [ 61.944393][ T5056] netlink_unicast+0x53b/0x810 [ 61.949157][ T5056] ? netlink_attachskb+0x870/0x870 [ 61.954287][ T5056] ? __phys_addr_symbol+0x30/0x70 [ 61.959331][ T5056] ? __check_object_size+0x322/0x730 [ 61.964626][ T5056] netlink_sendmsg+0x8b4/0xd70 [ 61.969398][ T5056] ? netlink_unicast+0x810/0x810 [ 61.974378][ T5056] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 61.979664][ T5056] ? netlink_unicast+0x810/0x810 [ 61.984608][ T5056] __sock_sendmsg+0xd5/0x180 [ 61.989233][ T5056] ____sys_sendmsg+0x6ac/0x940 [ 61.994019][ T5056] ? copy_msghdr_from_user+0x10b/0x160 [ 61.999490][ T5056] ? kernel_sendmsg+0x50/0x50 [ 62.004177][ T5056] ? finish_task_switch.isra.0+0x217/0xcb0 [ 62.009985][ T5056] ? __switch_to+0x749/0x1370 [ 62.014666][ T5056] ___sys_sendmsg+0x135/0x1d0 [ 62.019342][ T5056] ? do_recvmmsg+0x740/0x740 [ 62.023949][ T5056] ? lock_sync+0x190/0x190 [ 62.028381][ T5056] ? ptrace_stop.part.0+0x44a/0x930 [ 62.033593][ T5056] ? __fget_light+0x172/0x200 [ 62.038275][ T5056] __sys_sendmsg+0x117/0x1e0 [ 62.042867][ T5056] ? __sys_sendmsg_sock+0x30/0x30 [ 62.047886][ T5056] ? ptrace_notify+0xf1/0x130 [ 62.052567][ T5056] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.057763][ T5056] ? ptrace_notify+0xf1/0x130 [ 62.062441][ T5056] do_syscall_64+0xd0/0x250 [ 62.066947][ T5056] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.072837][ T5056] RIP: 0033:0x7f38e85f48b9 [ 62.077246][ T5056] 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 [ 62.096933][ T5056] RSP: 002b:00007ffde0434548 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.105339][ T5056] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f38e85f48b9 [ 62.113306][ T5056] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 62.121276][ T5056] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffde04345c0 [ 62.129239][ T5056] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 62.137203][ T5056] R13: 00007ffde0434748 R14: 0000000000000001 R15: 0000000000000001 [ 62.145175][ T5056] [ 62.148274][ T5056] Modules linked in: [ 62.152158][ T5056] CR2: 0000000000000000 [ 62.156303][ T5056] ---[ end trace 0000000000000000 ]--- [ 62.161744][ T5056] RIP: 0010:0x0 [ 62.165214][ T5056] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.172569][ T5056] RSP: 0018:ffffc90003a3f408 EFLAGS: 00010246 [ 62.178626][ T5056] RAX: dffffc0000000000 RBX: ffff88802dc98000 RCX: ffffffff889a5187 [ 62.186589][ T5056] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88802dc98000 [ 62.194550][ T5056] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.202514][ T5056] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff88807d196000 [ 62.210476][ T5056] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.218447][ T5056] FS: 0000555556c1c380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 62.227390][ T5056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.233970][ T5056] CR2: ffffffffffffffd6 CR3: 0000000022ab1000 CR4: 00000000003506f0 [ 62.241941][ T5056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.249903][ T5056] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.257868][ T5056] Kernel panic - not syncing: Fatal exception [ 62.264104][ T5056] Kernel Offset: disabled [ 62.268410][ T5056] Rebooting in 86400 seconds..