./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2323037607 <...> Warning: Permanently added '10.128.0.78' (ED25519) to the list of known hosts. execve("./syz-executor2323037607", ["./syz-executor2323037607"], 0x7ffd4e081ce0 /* 10 vars */) = 0 brk(NULL) = 0x555557310000 brk(0x555557310d00) = 0x555557310d00 arch_prctl(ARCH_SET_FS, 0x555557310380) = 0 set_tid_address(0x555557310650) = 5063 set_robust_list(0x555557310660, 24) = 0 rseq(0x555557310ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2323037607", 4096) = 28 getrandom("\x62\x45\x01\x64\x8e\x5d\x2c\x9e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557310d00 brk(0x555557331d00) = 0x555557331d00 brk(0x555557332000) = 0x555557332000 mprotect(0x7fe9e438b000, 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 5064 attached , child_tidptr=0x555557310650) = 5064 [pid 5064] set_robust_list(0x555557310660, 24) = 0 [pid 5064] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5064] setsid() = 1 [pid 5064] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5064] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5064] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5064] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5064] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5064] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5064] unshare(CLONE_NEWNS) = 0 [pid 5064] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5064] unshare(CLONE_NEWIPC) = 0 [pid 5064] unshare(CLONE_NEWCGROUP) = 0 [pid 5064] unshare(CLONE_NEWUTS) = 0 [pid 5064] unshare(CLONE_SYSVSEM) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "16777216", 8) = 8 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "536870912", 9) = 9 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1024", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "8192", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1024", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1024", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5064] close(3) = 0 [pid 5064] getpid() = 1 [pid 5064] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 61.683475][ T5064] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 61.691292][ T5064] #PF: supervisor instruction fetch in kernel mode [ 61.697780][ T5064] #PF: error_code(0x0010) - not-present page [ 61.703740][ T5064] PGD 2330d067 P4D 2330d067 PUD 2330e067 PMD 0 [ 61.709976][ T5064] Oops: 0010 [#1] PREEMPT SMP KASAN [ 61.715154][ T5064] CPU: 0 PID: 5064 Comm: syz-executor232 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 61.725021][ T5064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 61.735060][ T5064] RIP: 0010:0x0 [ 61.738520][ T5064] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 61.745868][ T5064] RSP: 0018:ffffc90003d77408 EFLAGS: 00010246 [ 61.751942][ T5064] RAX: dffffc0000000000 RBX: ffff88801c822000 RCX: ffffffff889a5187 [ 61.759908][ T5064] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88801c822000 [ 61.767873][ T5064] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 61.775842][ T5064] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888021966000 [ 61.783805][ T5064] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 61.791766][ T5064] FS: 0000555557310380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 61.800693][ T5064] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.807269][ T5064] CR2: ffffffffffffffd6 CR3: 000000001d8f8000 CR4: 00000000003506f0 [ 61.815232][ T5064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.823193][ T5064] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.831161][ T5064] Call Trace: [ 61.834429][ T5064] [ 61.837354][ T5064] ? show_regs+0x8e/0xa0 [ 61.841619][ T5064] ? __die+0x2c/0x80 [ 61.845512][ T5064] ? page_fault_oops+0x397/0xab0 [ 61.850446][ T5064] ? dump_pagetable+0x530/0x530 [ 61.855290][ T5064] ? netem_change+0x1505/0x2520 [ 61.860142][ T5064] ? netem_dump+0x1260/0x1260 [ 61.864817][ T5064] ? do_user_addr_fault+0x562/0x1020 [ 61.870101][ T5064] ? rcu_is_watching+0x12/0xb0 [ 61.874865][ T5064] ? exc_page_fault+0x5c/0xc0 [ 61.879538][ T5064] ? asm_exc_page_fault+0x26/0x30 [ 61.884561][ T5064] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 61.890627][ T5064] ? qdisc_create+0xca7/0x1440 [ 61.895390][ T5064] qdisc_create+0x6c0/0x1440 [ 61.899985][ T5064] ? tc_get_qdisc+0xdf0/0xdf0 [ 61.904663][ T5064] ? __nla_parse+0x40/0x50 [ 61.909079][ T5064] tc_modify_qdisc+0x4d5/0x1c30 [ 61.913933][ T5064] ? qdisc_create+0x1440/0x1440 [ 61.918780][ T5064] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 61.924768][ T5064] ? bpf_lsm_capable+0x9/0x10 [ 61.929435][ T5064] ? security_capable+0x92/0xc0 [ 61.934283][ T5064] ? qdisc_create+0x1440/0x1440 [ 61.939131][ T5064] rtnetlink_rcv_msg+0x3c7/0xe00 [ 61.944066][ T5064] ? rtnl_fill_vf+0x490/0x490 [ 61.948743][ T5064] netlink_rcv_skb+0x16b/0x440 [ 61.953505][ T5064] ? rtnl_fill_vf+0x490/0x490 [ 61.958263][ T5064] ? netlink_ack+0x1380/0x1380 [ 61.963021][ T5064] ? lock_sync+0x190/0x190 [ 61.967431][ T5064] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 61.973761][ T5064] ? netlink_deliver_tap+0x1a0/0xd00 [ 61.979060][ T5064] ? _copy_from_iter+0x2c1/0x10f0 [ 61.984091][ T5064] netlink_unicast+0x53b/0x810 [ 61.988852][ T5064] ? netlink_attachskb+0x870/0x870 [ 61.993965][ T5064] ? __phys_addr_symbol+0x30/0x70 [ 61.998995][ T5064] ? __check_object_size+0x322/0x730 [ 62.004301][ T5064] netlink_sendmsg+0x8b4/0xd70 [ 62.009077][ T5064] ? netlink_unicast+0x810/0x810 [ 62.014037][ T5064] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 62.019337][ T5064] ? netlink_unicast+0x810/0x810 [ 62.024279][ T5064] __sock_sendmsg+0xd5/0x180 [ 62.028877][ T5064] ____sys_sendmsg+0x6ac/0x940 [ 62.033646][ T5064] ? copy_msghdr_from_user+0x10b/0x160 [ 62.041448][ T5064] ? kernel_sendmsg+0x50/0x50 [ 62.046137][ T5064] ? finish_task_switch.isra.0+0x217/0xcb0 [ 62.051950][ T5064] ? __switch_to+0x749/0x1370 [ 62.056644][ T5064] ___sys_sendmsg+0x135/0x1d0 [ 62.061322][ T5064] ? do_recvmmsg+0x740/0x740 [ 62.065908][ T5064] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 62.071900][ T5064] ? lock_sync+0x190/0x190 [ 62.076310][ T5064] ? ptrace_stop.part.0+0x44a/0x930 [ 62.081512][ T5064] ? __fget_light+0x172/0x200 [ 62.086189][ T5064] __sys_sendmsg+0x117/0x1e0 [ 62.090780][ T5064] ? __sys_sendmsg_sock+0x30/0x30 [ 62.095799][ T5064] ? ptrace_notify+0xf1/0x130 [ 62.100508][ T5064] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.105707][ T5064] ? ptrace_notify+0xf1/0x130 [ 62.110381][ T5064] do_syscall_64+0xd0/0x250 [ 62.114892][ T5064] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 62.120784][ T5064] RIP: 0033:0x7fe9e4318879 [ 62.125192][ T5064] 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 [ 62.144881][ T5064] RSP: 002b:00007fff614c3c38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.153293][ T5064] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe9e4318879 [ 62.161258][ T5064] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 [ 62.169222][ T5064] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff614c3cb0 [ 62.177189][ T5064] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 62.185156][ T5064] R13: 00007fff614c3e38 R14: 0000000000000001 R15: 0000000000000001 [ 62.193130][ T5064] [ 62.196157][ T5064] Modules linked in: [ 62.200045][ T5064] CR2: 0000000000000000 [ 62.204195][ T5064] ---[ end trace 0000000000000000 ]--- [ 62.209641][ T5064] RIP: 0010:0x0 [ 62.213105][ T5064] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 62.220461][ T5064] RSP: 0018:ffffc90003d77408 EFLAGS: 00010246 [ 62.226525][ T5064] RAX: dffffc0000000000 RBX: ffff88801c822000 RCX: ffffffff889a5187 [ 62.234508][ T5064] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88801c822000 [ 62.242517][ T5064] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 62.250487][ T5064] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff888021966000 [ 62.258462][ T5064] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 62.266439][ T5064] FS: 0000555557310380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 62.275369][ T5064] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.281960][ T5064] CR2: ffffffffffffffd6 CR3: 000000001d8f8000 CR4: 00000000003506f0 [ 62.289938][ T5064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.297915][ T5064] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.305890][ T5064] Kernel panic - not syncing: Fatal exception [ 62.312134][ T5064] Kernel Offset: disabled [ 62.316444][ T5064] Rebooting in 86400 seconds..