./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1920169601 <...> Warning: Permanently added '10.128.0.30' (ED25519) to the list of known hosts. execve("./syz-executor1920169601", ["./syz-executor1920169601"], 0x7ffc532b30e0 /* 10 vars */) = 0 brk(NULL) = 0x555555948000 brk(0x555555948d00) = 0x555555948d00 arch_prctl(ARCH_SET_FS, 0x555555948380) = 0 set_tid_address(0x555555948650) = 5054 set_robust_list(0x555555948660, 24) = 0 rseq(0x555555948ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1920169601", 4096) = 28 getrandom("\xe2\x4e\xb0\x82\xb9\xdb\x49\xde", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555948d00 brk(0x555555969d00) = 0x555555969d00 brk(0x55555596a000) = 0x55555596a000 mprotect(0x7f06a8e1a000, 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 5055 attached , child_tidptr=0x555555948650) = 5055 [pid 5055] set_robust_list(0x555555948660, 24) = 0 [pid 5055] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5055] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5055] setsid() = 1 [pid 5055] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5055] unshare(CLONE_NEWNS) = 0 [pid 5055] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5055] unshare(CLONE_NEWIPC) = 0 [pid 5055] unshare(CLONE_NEWCGROUP) = 0 [pid 5055] unshare(CLONE_NEWUTS) = 0 [pid 5055] unshare(CLONE_SYSVSEM) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "16777216", 8) = 8 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "536870912", 9) = 9 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "8192", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5055] close(3) = 0 [pid 5055] getpid() = 1 [pid 5055] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 59.434916][ T5055] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 59.442744][ T5055] #PF: supervisor instruction fetch in kernel mode [ 59.449218][ T5055] #PF: error_code(0x0010) - not-present page [ 59.455169][ T5055] PGD 28b24067 P4D 28b24067 PUD 28b25067 PMD 0 [ 59.461398][ T5055] Oops: 0010 [#1] PREEMPT SMP KASAN [ 59.466573][ T5055] CPU: 0 PID: 5055 Comm: syz-executor192 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 59.476463][ T5055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 59.486504][ T5055] RIP: 0010:0x0 [ 59.489968][ T5055] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 59.497308][ T5055] RSP: 0018:ffffc90003cdf408 EFLAGS: 00010246 [ 59.503354][ T5055] RAX: dffffc0000000000 RBX: ffff888066b4a000 RCX: ffffffff889a5187 [ 59.511307][ T5055] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888066b4a000 [ 59.519259][ T5055] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 59.527212][ T5055] R10: 0000000000000001 R11: 0000000089c0dff3 R12: ffff88807d6b6000 [ 59.535166][ T5055] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 59.543128][ T5055] FS: 0000555555948380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 59.552055][ T5055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.558629][ T5055] CR2: ffffffffffffffd6 CR3: 000000001ae95000 CR4: 00000000003506f0 [ 59.566593][ T5055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.574555][ T5055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.582525][ T5055] Call Trace: [ 59.585792][ T5055] [ 59.588713][ T5055] ? show_regs+0x8e/0xa0 [ 59.592968][ T5055] ? __die+0x2c/0x80 [ 59.596947][ T5055] ? page_fault_oops+0x397/0xab0 [ 59.601884][ T5055] ? dump_pagetable+0x530/0x530 [ 59.606730][ T5055] ? netem_change+0x1505/0x2520 [ 59.611583][ T5055] ? netem_dump+0x1260/0x1260 [ 59.616254][ T5055] ? do_user_addr_fault+0x562/0x1020 [ 59.621536][ T5055] ? rcu_is_watching+0x12/0xb0 [ 59.626296][ T5055] ? exc_page_fault+0x5c/0xc0 [ 59.630964][ T5055] ? asm_exc_page_fault+0x26/0x30 [ 59.635985][ T5055] ? qdisc_create+0xca7/0x1440 [ 59.640763][ T5055] qdisc_create+0x6c0/0x1440 [ 59.645353][ T5055] ? tc_get_qdisc+0xdf0/0xdf0 [ 59.650035][ T5055] ? __nla_parse+0x40/0x50 [ 59.654448][ T5055] tc_modify_qdisc+0x4d5/0x1c30 [ 59.659303][ T5055] ? qdisc_create+0x1440/0x1440 [ 59.664152][ T5055] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 59.670141][ T5055] ? bpf_lsm_capable+0x9/0x10 [ 59.674810][ T5055] ? security_capable+0x92/0xc0 [ 59.679659][ T5055] ? qdisc_create+0x1440/0x1440 [ 59.684506][ T5055] rtnetlink_rcv_msg+0x3c7/0xe00 [ 59.689442][ T5055] ? rtnl_fill_vf+0x490/0x490 [ 59.694115][ T5055] netlink_rcv_skb+0x16b/0x440 [ 59.698877][ T5055] ? rtnl_fill_vf+0x490/0x490 [ 59.703546][ T5055] ? netlink_ack+0x1380/0x1380 [ 59.708308][ T5055] ? lock_sync+0x190/0x190 [ 59.712716][ T5055] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 59.719050][ T5055] ? netlink_deliver_tap+0x1a0/0xd00 [ 59.724331][ T5055] ? _copy_from_iter+0x2c1/0x10f0 [ 59.729351][ T5055] netlink_unicast+0x53b/0x810 [ 59.734114][ T5055] ? netlink_attachskb+0x870/0x870 [ 59.739222][ T5055] ? __phys_addr_symbol+0x30/0x70 [ 59.744245][ T5055] ? __check_object_size+0x322/0x730 [ 59.749532][ T5055] netlink_sendmsg+0x8b4/0xd70 [ 59.754295][ T5055] ? netlink_unicast+0x810/0x810 [ 59.759231][ T5055] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 59.764514][ T5055] ? netlink_unicast+0x810/0x810 [ 59.769448][ T5055] __sock_sendmsg+0xd5/0x180 [ 59.774045][ T5055] ____sys_sendmsg+0x6ac/0x940 [ 59.778808][ T5055] ? copy_msghdr_from_user+0x10b/0x160 [ 59.784258][ T5055] ? kernel_sendmsg+0x50/0x50 [ 59.788937][ T5055] ? finish_task_switch.isra.0+0x217/0xcb0 [ 59.794742][ T5055] ? __switch_to+0x749/0x1370 [ 59.799419][ T5055] ___sys_sendmsg+0x135/0x1d0 [ 59.804091][ T5055] ? do_recvmmsg+0x740/0x740 [ 59.808680][ T5055] ? lock_sync+0x190/0x190 [ 59.813086][ T5055] ? ptrace_stop.part.0+0x44a/0x930 [ 59.818287][ T5055] ? __fget_light+0x172/0x200 [ 59.822963][ T5055] __sys_sendmsg+0x117/0x1e0 [ 59.827546][ T5055] ? __sys_sendmsg_sock+0x30/0x30 [ 59.832563][ T5055] ? ptrace_notify+0xf1/0x130 [ 59.837240][ T5055] ? _raw_spin_unlock_irq+0x2e/0x50 [ 59.842431][ T5055] ? ptrace_notify+0xf1/0x130 [ 59.847103][ T5055] do_syscall_64+0xd0/0x250 [ 59.851606][ T5055] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 59.857496][ T5055] RIP: 0033:0x7f06a8da68b9 [ 59.861901][ T5055] 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 [ 59.881499][ T5055] RSP: 002b:00007ffc79ff5258 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 59.889901][ T5055] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f06a8da68b9 [ 59.897862][ T5055] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 59.905823][ T5055] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc79ff52d0 [ 59.913781][ T5055] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 59.921740][ T5055] R13: 00007ffc79ff5458 R14: 0000000000000001 R15: 0000000000000001 [ 59.929706][ T5055] [ 59.932713][ T5055] Modules linked in: [ 59.936595][ T5055] CR2: 0000000000000000 [ 59.940734][ T5055] ---[ end trace 0000000000000000 ]--- [ 59.946171][ T5055] RIP: 0010:0x0 [ 59.949622][ T5055] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 59.956981][ T5055] RSP: 0018:ffffc90003cdf408 EFLAGS: 00010246 [ 59.963103][ T5055] RAX: dffffc0000000000 RBX: ffff888066b4a000 RCX: ffffffff889a5187 [ 59.971068][ T5055] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888066b4a000 [ 59.979031][ T5055] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 59.986993][ T5055] R10: 0000000000000001 R11: 0000000089c0dff3 R12: ffff88807d6b6000 [ 59.994956][ T5055] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 60.002919][ T5055] FS: 0000555555948380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 60.011842][ T5055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.018418][ T5055] CR2: ffffffffffffffd6 CR3: 000000001ae95000 CR4: 00000000003506f0 [ 60.026382][ T5055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.034340][ T5055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.042305][ T5055] Kernel panic - not syncing: Fatal exception [ 60.048538][ T5055] Kernel Offset: disabled [ 60.052840][ T5055] Rebooting in 86400 seconds..