./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1148586115 <...> Warning: Permanently added '10.128.0.75' (ED25519) to the list of known hosts. execve("./syz-executor1148586115", ["./syz-executor1148586115"], 0x7ffe43e54ac0 /* 10 vars */) = 0 brk(NULL) = 0x55556a5eb000 brk(0x55556a5ebd00) = 0x55556a5ebd00 arch_prctl(ARCH_SET_FS, 0x55556a5eb380) = 0 set_tid_address(0x55556a5eb650) = 5017 set_robust_list(0x55556a5eb660, 24) = 0 rseq(0x55556a5ebca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1148586115", 4096) = 28 getrandom("\xdd\x8a\x63\x83\x79\x44\xb0\x97", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556a5ebd00 brk(0x55556a60cd00) = 0x55556a60cd00 brk(0x55556a60d000) = 0x55556a60d000 mprotect(0x7f4a858e3000, 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=0x55556a5eb650) = 5018 ./strace-static-x86_64: Process 5018 attached [pid 5018] set_robust_list(0x55556a5eb660, 24) = 0 [pid 5018] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5018] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5018] setsid() = 1 [pid 5018] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5018] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5018] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5018] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5018] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5018] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5018] unshare(CLONE_NEWNS) = 0 [pid 5018] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5018] unshare(CLONE_NEWIPC) = 0 [pid 5018] unshare(CLONE_NEWCGROUP) = 0 [pid 5018] unshare(CLONE_NEWUTS) = 0 [pid 5018] unshare(CLONE_SYSVSEM) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "16777216", 8) = 8 [pid 5018] close(3) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "536870912", 9) = 9 [pid 5018] close(3) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "1024", 4) = 4 [pid 5018] close(3) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "8192", 4) = 4 [pid 5018] close(3) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "1024", 4) = 4 [pid 5018] close(3) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "1024", 4) = 4 [pid 5018] close(3) = 0 [pid 5018] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5018] close(3) = 0 [pid 5018] getpid() = 1 [pid 5018] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5045] set_robust_list(0x55556a5eb660, 24) = 0 [pid 5018] <... clone resumed>, child_tidptr=0x55556a5eb650) = 2 [pid 5045] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5045] setpgid(0, 0) = 0 [pid 5045] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5045] write(3, "1000", 4) = 4 [pid 5045] close(3) = 0 [pid 5045] openat(AT_FDCWD, "/dev/net/tun", O_WRONLY|O_CREAT|O_TRUNC|O_NOATIME, 000) = 3 [pid 5045] ioctl(3, TUNSETIFF, 0x20000200) = 0 [pid 5045] socket(AF_INET, SOCK_PACKET, IPPROTO_IGMP) = 4 [pid 5045] ioctl(4, SIOCSIFFLAGS, {ifr_name="syzkaller1", ifr_flags=IFF_UP|IFF_DYNAMIC}) = 0 [ 157.877578][ T5045] syz-executor114 uses obsolete (PF_INET,SOCK_PACKET) [ 157.897180][ T5045] ===================================================== [ 157.904506][ T5045] BUG: KMSAN: uninit-value in gre_rcv+0x11f8/0x1930 [ 157.911357][ T5045] gre_rcv+0x11f8/0x1930 [ 157.915776][ T5045] ip6_protocol_deliver_rcu+0x1d4c/0x2ca0 [ 157.921844][ T5045] ip6_input+0x15d/0x430 [ 157.926250][ T5045] ip6_mc_input+0xa7e/0xc80 [ 157.930949][ T5045] ip6_rcv_finish+0x955/0x970 [ 157.935809][ T5045] ipv6_rcv+0xde/0x390 [ 157.940048][ T5045] __netif_receive_skb+0x1da/0xa00 [ 157.945498][ T5045] netif_receive_skb+0x58/0x660 [ 157.950588][ T5045] tun_rx_batched+0x3ee/0x980 [ 157.955409][ T5045] tun_get_user+0x5566/0x69e0 [ 157.960171][ T5045] tun_chr_write_iter+0x3af/0x5d0 [ 157.965415][ T5045] vfs_write+0xb63/0x1520 [ 157.969932][ T5045] ksys_write+0x20f/0x4c0 [ 157.974535][ T5045] __x64_sys_write+0x93/0xe0 [ 157.979322][ T5045] do_syscall_64+0xd5/0x1f0 [ 157.984137][ T5045] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 157.990548][ T5045] [ 157.992955][ T5045] Uninit was created at: [ 157.997432][ T5045] kmem_cache_alloc_node+0x613/0xc50 [ 158.003058][ T5045] kmalloc_reserve+0x13d/0x4a0 [ 158.007980][ T5045] __alloc_skb+0x35b/0x7a0 [ 158.012580][ T5045] alloc_skb_with_frags+0xc8/0xbf0 [ 158.017840][ T5045] sock_alloc_send_pskb+0xa81/0xbf0 [ 158.023302][ T5045] tun_get_user+0x209a/0x69e0 [ 158.028112][ T5045] tun_chr_write_iter+0x3af/0x5d0 [ 158.033362][ T5045] vfs_write+0xb63/0x1520 [ 158.037878][ T5045] ksys_write+0x20f/0x4c0 [ 158.042498][ T5045] __x64_sys_write+0x93/0xe0 [ 158.047291][ T5045] do_syscall_64+0xd5/0x1f0 [ 158.052084][ T5045] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 158.058146][ T5045] [ 158.060614][ T5045] CPU: 1 PID: 5045 Comm: syz-executor114 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0 [ 158.071263][ T5045] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 158.081920][ T5045] ===================================================== [ 158.088953][ T5045] Disabling lock debugging due to kernel taint [ 158.095281][ T5045] Kernel panic - not syncing: kmsan.panic set ... [ 158.101815][ T5045] CPU: 1 PID: 5045 Comm: syz-executor114 Tainted: G B 6.9.0-rc1-syzkaller-00021-g962490525cff #0 [ 158.114038][ T5045] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 158.124171][ T5045] Call Trace: [ 158.127538][ T5045] [ 158.130574][ T5045] dump_stack_lvl+0x216/0x2d0 [ 158.135420][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.141428][ T5045] dump_stack+0x1e/0x30 [ 158.145737][ T5045] panic+0x4e2/0xcd0 [ 158.149747][ T5045] ? kmsan_get_metadata+0xf1/0x1d0 [ 158.154987][ T5045] kmsan_report+0x2d5/0x2e0 [ 158.159711][ T5045] ? kmsan_get_metadata+0x146/0x1d0 [ 158.165078][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.171119][ T5045] ? __msan_warning+0x95/0x120 [ 158.176074][ T5045] ? gre_rcv+0x11f8/0x1930 [ 158.180605][ T5045] ? ip6_protocol_deliver_rcu+0x1d4c/0x2ca0 [ 158.186701][ T5045] ? ip6_input+0x15d/0x430 [ 158.191307][ T5045] ? ip6_mc_input+0xa7e/0xc80 [ 158.196176][ T5045] ? ip6_rcv_finish+0x955/0x970 [ 158.201226][ T5045] ? ipv6_rcv+0xde/0x390 [ 158.205624][ T5045] ? __netif_receive_skb+0x1da/0xa00 [ 158.211038][ T5045] ? netif_receive_skb+0x58/0x660 [ 158.216253][ T5045] ? tun_rx_batched+0x3ee/0x980 [ 158.221358][ T5045] ? tun_get_user+0x5566/0x69e0 [ 158.226346][ T5045] ? tun_chr_write_iter+0x3af/0x5d0 [ 158.231696][ T5045] ? vfs_write+0xb63/0x1520 [ 158.236396][ T5045] ? ksys_write+0x20f/0x4c0 [ 158.241092][ T5045] ? __x64_sys_write+0x93/0xe0 [ 158.246054][ T5045] ? do_syscall_64+0xd5/0x1f0 [ 158.250915][ T5045] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 158.257118][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.263167][ T5045] ? ip6gre_tunnel_lookup+0x218e/0x2480 [ 158.268875][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.274920][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.280959][ T5045] ? __iptunnel_pull_header+0x888/0x9e0 [ 158.286688][ T5045] ? kmsan_get_metadata+0x146/0x1d0 [ 158.292009][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.298028][ T5045] __msan_warning+0x95/0x120 [ 158.302766][ T5045] gre_rcv+0x11f8/0x1930 [ 158.307212][ T5045] ? __pfx_gre_rcv+0x10/0x10 [ 158.311982][ T5045] ? __pfx_gre_rcv+0x10/0x10 [ 158.316738][ T5045] ip6_protocol_deliver_rcu+0x1d4c/0x2ca0 [ 158.322716][ T5045] ip6_input+0x15d/0x430 [ 158.327127][ T5045] ? __pfx_ip6_input_finish+0x10/0x10 [ 158.332634][ T5045] ip6_mc_input+0xa7e/0xc80 [ 158.337278][ T5045] ? __pfx_ip_local_deliver+0x10/0x10 [ 158.342800][ T5045] ? __pfx_ip6_mc_input+0x10/0x10 [ 158.347967][ T5045] ip6_rcv_finish+0x955/0x970 [ 158.352760][ T5045] ipv6_rcv+0xde/0x390 [ 158.356988][ T5045] ? __pfx_ip6_rcv_finish+0x10/0x10 [ 158.362330][ T5045] __netif_receive_skb+0x1da/0xa00 [ 158.367631][ T5045] ? kmsan_get_metadata+0x146/0x1d0 [ 158.373003][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.379015][ T5045] netif_receive_skb+0x58/0x660 [ 158.384057][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.390083][ T5045] ? tun_rx_batched+0x37c/0x980 [ 158.395029][ T5045] tun_rx_batched+0x3ee/0x980 [ 158.399828][ T5045] ? kmsan_get_metadata+0x146/0x1d0 [ 158.405219][ T5045] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 158.411246][ T5045] tun_get_user+0x5566/0x69e0 [ 158.416086][ T5045] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 158.422560][ T5045] ? ref_tracker_alloc+0x4a0/0x7e0 [ 158.427855][ T5045] tun_chr_write_iter+0x3af/0x5d0 [ 158.433022][ T5045] ? __pfx_tun_chr_write_iter+0x10/0x10 [ 158.438771][ T5045] vfs_write+0xb63/0x1520 [ 158.443288][ T5045] ksys_write+0x20f/0x4c0 [ 158.447743][ T5045] __x64_sys_write+0x93/0xe0 [ 158.452458][ T5045] do_syscall_64+0xd5/0x1f0 [ 158.457082][ T5045] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 158.463105][ T5045] RIP: 0033:0x7f4a8586aaa9 [ 158.467630][ T5045] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 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 [ 158.487384][ T5045] RSP: 002b:00007ffd878715e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 158.495982][ T5045] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4a8586aaa9 [ 158.504114][ T5045] RDX: 000000000000fdef RSI: 0000000020000040 RDI: 0000000000000003 [ 158.512207][ T5045] RBP: 00000000000f4240 R08: 0000000100000000 R09: 0000000100000000 [ 158.520283][ T5045] R10: 0000000100000000 R11: 0000000000000246 R12: 00007ffd87871640 [ 158.528476][ T5045] R13: 0000000000000001 R14: 00007ffd87871640 R15: 0000000000000003 [ 158.536571][ T5045] [ 158.540000][ T5045] Kernel Offset: disabled [ 158.544401][ T5045] Rebooting in 86400 seconds..