./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2600765231 <...> Warning: Permanently added '10.128.0.234' (ED25519) to the list of known hosts. execve("./syz-executor2600765231", ["./syz-executor2600765231"], 0x7ffe1349d7a0 /* 10 vars */) = 0 brk(NULL) = 0x5555564a4000 brk(0x5555564a4d00) = 0x5555564a4d00 arch_prctl(ARCH_SET_FS, 0x5555564a4380) = 0 set_tid_address(0x5555564a4650) = 5058 set_robust_list(0x5555564a4660, 24) = 0 rseq(0x5555564a4ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2600765231", 4096) = 28 getrandom("\x35\x05\xf4\x1d\xff\x0f\xb8\x3b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555564a4d00 brk(0x5555564c5d00) = 0x5555564c5d00 brk(0x5555564c6000) = 0x5555564c6000 mprotect(0x7f2711a0c000, 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=0x5555564a4650) = 5059 ./strace-static-x86_64: Process 5059 attached [pid 5059] set_robust_list(0x5555564a4660, 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 [ 63.248455][ T5059] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 63.256296][ T5059] #PF: supervisor instruction fetch in kernel mode [ 63.262775][ T5059] #PF: error_code(0x0010) - not-present page [ 63.268748][ T5059] PGD 1db64067 P4D 1db64067 PUD 1db65067 PMD 0 [ 63.274983][ T5059] Oops: 0010 [#1] PREEMPT SMP KASAN [ 63.280162][ T5059] CPU: 1 PID: 5059 Comm: syz-executor260 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 63.290031][ T5059] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 63.300090][ T5059] RIP: 0010:0x0 [ 63.303537][ T5059] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 63.310890][ T5059] RSP: 0018:ffffc90003c8f408 EFLAGS: 00010246 [ 63.316936][ T5059] RAX: dffffc0000000000 RBX: ffff888023a1c000 RCX: ffffffff889a5187 [ 63.324908][ T5059] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888023a1c000 [ 63.332877][ T5059] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 63.340838][ T5059] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff88807eec2000 [ 63.348791][ T5059] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 63.356745][ T5059] FS: 00005555564a4380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 63.365676][ T5059] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.372252][ T5059] CR2: ffffffffffffffd6 CR3: 0000000075548000 CR4: 00000000003506f0 [ 63.380241][ T5059] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.388209][ T5059] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.396171][ T5059] Call Trace: [ 63.399435][ T5059] [ 63.402347][ T5059] ? show_regs+0x8e/0xa0 [ 63.406594][ T5059] ? __die+0x2c/0x80 [ 63.410474][ T5059] ? page_fault_oops+0x397/0xab0 [ 63.415406][ T5059] ? dump_pagetable+0x530/0x530 [ 63.420241][ T5059] ? netem_change+0x1505/0x2520 [ 63.425084][ T5059] ? netem_dump+0x1260/0x1260 [ 63.429742][ T5059] ? do_user_addr_fault+0x562/0x1020 [ 63.435016][ T5059] ? rcu_is_watching+0x12/0xb0 [ 63.439771][ T5059] ? exc_page_fault+0x5c/0xc0 [ 63.444435][ T5059] ? asm_exc_page_fault+0x26/0x30 [ 63.449446][ T5059] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 63.455500][ T5059] ? qdisc_create+0xca7/0x1440 [ 63.460257][ T5059] qdisc_create+0x6c0/0x1440 [ 63.464841][ T5059] ? tc_get_qdisc+0xdf0/0xdf0 [ 63.469590][ T5059] ? __nla_parse+0x40/0x50 [ 63.474013][ T5059] tc_modify_qdisc+0x4d5/0x1c30 [ 63.478876][ T5059] ? qdisc_create+0x1440/0x1440 [ 63.483734][ T5059] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 63.489736][ T5059] ? bpf_lsm_capable+0x9/0x10 [ 63.494432][ T5059] ? security_capable+0x92/0xc0 [ 63.499277][ T5059] ? qdisc_create+0x1440/0x1440 [ 63.504115][ T5059] rtnetlink_rcv_msg+0x3c7/0xe00 [ 63.509038][ T5059] ? rtnl_fill_vf+0x490/0x490 [ 63.513701][ T5059] netlink_rcv_skb+0x16b/0x440 [ 63.518452][ T5059] ? rtnl_fill_vf+0x490/0x490 [ 63.523383][ T5059] ? netlink_ack+0x1380/0x1380 [ 63.528135][ T5059] ? lock_sync+0x190/0x190 [ 63.532538][ T5059] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 63.538894][ T5059] ? netlink_deliver_tap+0x1a0/0xd00 [ 63.544194][ T5059] ? _copy_from_iter+0x2c1/0x10f0 [ 63.549211][ T5059] netlink_unicast+0x53b/0x810 [ 63.553971][ T5059] ? netlink_attachskb+0x870/0x870 [ 63.559088][ T5059] ? __phys_addr_symbol+0x30/0x70 [ 63.564185][ T5059] ? __check_object_size+0x322/0x730 [ 63.569546][ T5059] netlink_sendmsg+0x8b4/0xd70 [ 63.574302][ T5059] ? netlink_unicast+0x810/0x810 [ 63.579226][ T5059] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 63.584505][ T5059] ? netlink_unicast+0x810/0x810 [ 63.589429][ T5059] __sock_sendmsg+0xd5/0x180 [ 63.594014][ T5059] ____sys_sendmsg+0x6ac/0x940 [ 63.598770][ T5059] ? copy_msghdr_from_user+0x10b/0x160 [ 63.604224][ T5059] ? kernel_sendmsg+0x50/0x50 [ 63.608907][ T5059] ? finish_task_switch.isra.0+0x217/0xcb0 [ 63.614749][ T5059] ? __switch_to+0x749/0x1370 [ 63.619426][ T5059] ___sys_sendmsg+0x135/0x1d0 [ 63.624102][ T5059] ? do_recvmmsg+0x740/0x740 [ 63.628681][ T5059] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 63.634656][ T5059] ? lock_sync+0x190/0x190 [ 63.639053][ T5059] ? ptrace_stop.part.0+0x44a/0x930 [ 63.644242][ T5059] ? __fget_light+0x172/0x200 [ 63.648915][ T5059] __sys_sendmsg+0x117/0x1e0 [ 63.653497][ T5059] ? __sys_sendmsg_sock+0x30/0x30 [ 63.658504][ T5059] ? ptrace_notify+0xf1/0x130 [ 63.663171][ T5059] ? _raw_spin_unlock_irq+0x2e/0x50 [ 63.668359][ T5059] ? ptrace_notify+0xf1/0x130 [ 63.673025][ T5059] do_syscall_64+0xd0/0x250 [ 63.677519][ T5059] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 63.683398][ T5059] RIP: 0033:0x7f2711999879 [ 63.687814][ 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 [ 63.707410][ T5059] RSP: 002b:00007fffcd941f68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.715804][ T5059] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2711999879 [ 63.723759][ T5059] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 [ 63.731719][ T5059] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffcd941fe0 [ 63.739674][ T5059] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 63.747630][ T5059] R13: 00007fffcd942168 R14: 0000000000000001 R15: 0000000000000001 [ 63.755591][ T5059] [ 63.758592][ T5059] Modules linked in: [ 63.762468][ T5059] CR2: 0000000000000000 [ 63.766602][ T5059] ---[ end trace 0000000000000000 ]--- [ 63.772033][ T5059] RIP: 0010:0x0 [ 63.775495][ T5059] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 63.782853][ T5059] RSP: 0018:ffffc90003c8f408 EFLAGS: 00010246 [ 63.788929][ T5059] RAX: dffffc0000000000 RBX: ffff888023a1c000 RCX: ffffffff889a5187 [ 63.796889][ T5059] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888023a1c000 [ 63.804846][ T5059] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 63.812801][ T5059] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff88807eec2000 [ 63.820753][ T5059] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 63.828720][ T5059] FS: 00005555564a4380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 63.837644][ T5059] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.844226][ T5059] CR2: ffffffffffffffd6 CR3: 0000000075548000 CR4: 00000000003506f0 [ 63.852181][ T5059] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.860135][ T5059] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.868089][ T5059] Kernel panic - not syncing: Fatal exception [ 63.874531][ T5059] Kernel Offset: disabled [ 63.878857][ T5059] Rebooting in 86400 seconds..