./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1535432802 <...> Warning: Permanently added '10.128.1.28' (ED25519) to the list of known hosts. execve("./syz-executor1535432802", ["./syz-executor1535432802"], 0x7ffd2f5cbf90 /* 10 vars */) = 0 brk(NULL) = 0x555555ed6000 brk(0x555555ed6d00) = 0x555555ed6d00 arch_prctl(ARCH_SET_FS, 0x555555ed6380) = 0 set_tid_address(0x555555ed6650) = 4994 set_robust_list(0x555555ed6660, 24) = 0 rseq(0x555555ed6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1535432802", 4096) = 28 getrandom("\xe4\x2c\x42\x7a\x1f\xcb\xd0\xa4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555ed6d00 brk(0x555555ef7d00) = 0x555555ef7d00 brk(0x555555ef8000) = 0x555555ef8000 mprotect(0x7ff86fec5000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555ed6650) = 4995 ./strace-static-x86_64: Process 4995 attached [pid 4995] set_robust_list(0x555555ed6660, 24) = 0 [pid 4995] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4995] setpgid(0, 0) = 0 [pid 4995] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 4995] write(3, "1000", 4) = 4 [pid 4995] close(3) = 0 [pid 4995] openat(AT_FDCWD, "/dev/net/tun", O_WRONLY|O_NOCTTY|O_NONBLOCK|O_SYNC|O_LARGEFILE) = 3 [pid 4995] ioctl(3, TUNSETIFF, 0x20000200) = 0 [pid 4995] socket(AF_INET, SOCK_PACKET, IPPROTO_IGMP) = 4 [pid 4995] ioctl(4, SIOCSIFFLAGS, {ifr_name="syzkaller1", ifr_flags=IFF_UP|IFF_DYNAMIC}) = 0 [ 162.013007][ T4995] syz-executor153 uses obsolete (PF_INET,SOCK_PACKET) [ 162.042020][ T4995] ===================================================== [ 162.049347][ T4995] BUG: KMSAN: uninit-value in dccp_v6_err+0x426/0x1aa0 [ 162.056581][ T4995] dccp_v6_err+0x426/0x1aa0 [ 162.061284][ T4995] icmpv6_notify+0x4c7/0x880 [ 162.066154][ T4995] icmpv6_rcv+0x19d5/0x30d0 [ 162.071027][ T4995] ip6_protocol_deliver_rcu+0xda6/0x2a60 [ 162.076988][ T4995] ip6_input+0x15d/0x430 [ 162.081414][ T4995] ip6_mc_input+0xa7e/0xc80 [ 162.086210][ T4995] ip6_rcv_finish+0x5db/0x870 [ 162.091076][ T4995] ipv6_rcv+0xda/0x390 [ 162.095441][ T4995] __netif_receive_skb+0x1a6/0x5a0 [ 162.101154][ T4995] netif_receive_skb+0x58/0x660 [ 162.106348][ T4995] tun_rx_batched+0x83b/0x920 [ 162.111247][ T4995] tun_get_user+0x564c/0x6940 [ 162.116185][ T4995] tun_chr_write_iter+0x3af/0x5d0 [ 162.121386][ T4995] vfs_write+0x8ef/0x15c0 [ 162.126023][ T4995] ksys_write+0x20f/0x4c0 [ 162.130713][ T4995] __x64_sys_write+0x93/0xd0 [ 162.135812][ T4995] do_syscall_64+0x41/0xc0 [ 162.140447][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 162.146774][ T4995] [ 162.149193][ T4995] Uninit was created at: [ 162.153767][ T4995] slab_post_alloc_hook+0x12f/0xb70 [ 162.159185][ T4995] kmem_cache_alloc_node+0x577/0xa80 [ 162.164827][ T4995] kmalloc_reserve+0x13d/0x4a0 [ 162.169836][ T4995] __alloc_skb+0x318/0x740 [ 162.174614][ T4995] alloc_skb_with_frags+0xc8/0xbd0 [ 162.179951][ T4995] sock_alloc_send_pskb+0xa80/0xbf0 [ 162.185488][ T4995] tun_get_user+0x23cf/0x6940 [ 162.190371][ T4995] tun_chr_write_iter+0x3af/0x5d0 [ 162.195793][ T4995] vfs_write+0x8ef/0x15c0 [ 162.200411][ T4995] ksys_write+0x20f/0x4c0 [ 162.205082][ T4995] __x64_sys_write+0x93/0xd0 [ 162.209880][ T4995] do_syscall_64+0x41/0xc0 [ 162.214621][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 162.220738][ T4995] [ 162.223281][ T4995] CPU: 0 PID: 4995 Comm: syz-executor153 Not tainted 6.6.0-rc1-syzkaller-00014-ga747acc0b752 #0 [ 162.234080][ T4995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 [ 162.244475][ T4995] ===================================================== [ 162.251542][ T4995] Disabling lock debugging due to kernel taint [ 162.257993][ T4995] Kernel panic - not syncing: kmsan.panic set ... [ 162.264640][ T4995] CPU: 0 PID: 4995 Comm: syz-executor153 Tainted: G B 6.6.0-rc1-syzkaller-00014-ga747acc0b752 #0 [ 162.276826][ T4995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 [ 162.287056][ T4995] Call Trace: [ 162.290459][ T4995] [ 162.293516][ T4995] dump_stack_lvl+0x1bf/0x240 [ 162.298525][ T4995] dump_stack+0x1e/0x20 [ 162.302902][ T4995] panic+0x4d5/0xc70 [ 162.307050][ T4995] ? add_taint+0x108/0x1a0 [ 162.311671][ T4995] kmsan_report+0x2d0/0x2d0 [ 162.316395][ T4995] ? __msan_warning+0x96/0x110 [ 162.321377][ T4995] ? dccp_v6_err+0x426/0x1aa0 [ 162.326323][ T4995] ? icmpv6_notify+0x4c7/0x880 [ 162.331269][ T4995] ? icmpv6_rcv+0x19d5/0x30d0 [ 162.336143][ T4995] ? ip6_protocol_deliver_rcu+0xda6/0x2a60 [ 162.342147][ T4995] ? ip6_input+0x15d/0x430 [ 162.346756][ T4995] ? ip6_mc_input+0xa7e/0xc80 [ 162.351618][ T4995] ? ip6_rcv_finish+0x5db/0x870 [ 162.356651][ T4995] ? ipv6_rcv+0xda/0x390 [ 162.361091][ T4995] ? __netif_receive_skb+0x1a6/0x5a0 [ 162.366621][ T4995] ? netif_receive_skb+0x58/0x660 [ 162.371851][ T4995] ? tun_rx_batched+0x83b/0x920 [ 162.377049][ T4995] ? tun_get_user+0x564c/0x6940 [ 162.382095][ T4995] ? tun_chr_write_iter+0x3af/0x5d0 [ 162.387492][ T4995] ? vfs_write+0x8ef/0x15c0 [ 162.392233][ T4995] ? ksys_write+0x20f/0x4c0 [ 162.397038][ T4995] ? __x64_sys_write+0x93/0xd0 [ 162.402016][ T4995] ? do_syscall_64+0x41/0xc0 [ 162.406818][ T4995] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 162.413378][ T4995] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 162.419937][ T4995] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 162.425979][ T4995] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 162.432018][ T4995] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 162.438486][ T4995] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 162.444630][ T4995] __msan_warning+0x96/0x110 [ 162.449425][ T4995] dccp_v6_err+0x426/0x1aa0 [ 162.454157][ T4995] ? dccp_v6_rcv+0x2c20/0x2c20 [ 162.459118][ T4995] icmpv6_notify+0x4c7/0x880 [ 162.464006][ T4995] icmpv6_rcv+0x19d5/0x30d0 [ 162.468733][ T4995] ? ipv6_icmp_sysctl_table_size+0x40/0x40 [ 162.474786][ T4995] ip6_protocol_deliver_rcu+0xda6/0x2a60 [ 162.480760][ T4995] ip6_input+0x15d/0x430 [ 162.485204][ T4995] ? ip6_input+0x430/0x430 [ 162.489819][ T4995] ip6_mc_input+0xa7e/0xc80 [ 162.494620][ T4995] ? ip6_input_finish+0x1a0/0x1a0 [ 162.499836][ T4995] ip6_rcv_finish+0x5db/0x870 [ 162.504713][ T4995] ipv6_rcv+0xda/0x390 [ 162.508962][ T4995] ? net_zcopy_put_abort+0xa0/0xa0 [ 162.514273][ T4995] __netif_receive_skb+0x1a6/0x5a0 [ 162.519642][ T4995] ? ip6_rcv_finish+0x870/0x870 [ 162.524850][ T4995] netif_receive_skb+0x58/0x660 [ 162.529916][ T4995] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 162.536054][ T4995] tun_rx_batched+0x83b/0x920 [ 162.540928][ T4995] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 162.546960][ T4995] tun_get_user+0x564c/0x6940 [ 162.551830][ T4995] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 162.558385][ T4995] ? __ia32_compat_sys_lseek+0x180/0x430 [ 162.564350][ T4995] ? kmsan_report+0x250/0x2d0 [ 162.569259][ T4995] tun_chr_write_iter+0x3af/0x5d0 [ 162.574586][ T4995] ? tun_chr_read_iter+0x670/0x670 [ 162.579943][ T4995] vfs_write+0x8ef/0x15c0 [ 162.584529][ T4995] ksys_write+0x20f/0x4c0 [ 162.589096][ T4995] __x64_sys_write+0x93/0xd0 [ 162.594016][ T4995] do_syscall_64+0x41/0xc0 [ 162.598648][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 162.604866][ T4995] RIP: 0033:0x7ff86fe52ab9 [ 162.609435][ T4995] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 [ 162.629360][ T4995] RSP: 002b:00007ffe536f9ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 162.637997][ T4995] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff86fe52ab9 [ 162.646142][ T4995] RDX: 000000000000fdef RSI: 0000000020000000 RDI: 0000000000000003 [ 162.654284][ T4995] RBP: 00007ff86fec55f0 R08: 0000000000000006 R09: 0000000000000006 [ 162.662412][ T4995] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000001 [ 162.670585][ T4995] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 162.678802][ T4995] [ 162.682323][ T4995] Kernel Offset: disabled [ 162.686721][ T4995] Rebooting in 86400 seconds..