./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1133773090 <...> forked to background, child pid 3058 no interfaces have a carrier [ 93.226241][ T3059] 8021q: adding VLAN 0 to HW filter on device bond0 [ 93.258370][ T3059] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller syzkaller login: [ 105.388093][ T1478] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.167' (ECDSA) to the list of known hosts. execve("./syz-executor1133773090", ["./syz-executor1133773090"], 0x7fffe0823260 /* 10 vars */) = 0 brk(NULL) = 0x555555735000 brk(0x555555735c40) = 0x555555735c40 arch_prctl(ARCH_SET_FS, 0x555555735300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1133773090", 4096) = 28 brk(0x555555756c40) = 0x555555756c40 brk(0x555555757000) = 0x555555757000 mprotect(0x7f94e2664000, 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=0x5555557355d0) = 3480 ./strace-static-x86_64: Process 3480 attached [pid 3480] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3480] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3480] setsid() = 1 [pid 3480] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3480] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3480] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3480] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3480] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 3480] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3480] unshare(CLONE_NEWNS) = 0 [pid 3480] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3480] unshare(CLONE_NEWIPC) = 0 [pid 3480] unshare(CLONE_NEWCGROUP) = 0 [pid 3480] unshare(CLONE_NEWUTS) = 0 [pid 3480] unshare(CLONE_SYSVSEM) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "16777216", 8) = 8 [pid 3480] close(3) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "536870912", 9) = 9 [pid 3480] close(3) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "1024", 4) = 4 [pid 3480] close(3) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "8192", 4) = 4 [pid 3480] close(3) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "1024", 4) = 4 [pid 3480] close(3) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "1024", 4) = 4 [pid 3480] close(3) = 0 [pid 3480] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3480] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3480] close(3) = 0 [pid 3480] getpid() = 1 [pid 3480] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<) = 0 [pid 3480] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555557355d0) = 3 ./strace-static-x86_64: Process 3508 attached [pid 3508] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3508] setpgid(0, 0) = 0 [pid 3508] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3508] write(3, "1000", 4) = 4 [pid 3508] close(3) = 0 [pid 3508] socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) = 3 [pid 3508] setsockopt(3, SOL_SOCKET, SO_BINDTODEVICE, "\x67\x72\x65\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16) = 0 [pid 3508] connect(3, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("224.0.0.2")}, 16) = 0 [ 143.737664][ T3508] ===================================================== [ 143.744914][ T3508] BUG: KMSAN: kernel-network-infoleak in xmit_one+0x100/0x5f0 [ 143.752729][ T3508] xmit_one+0x100/0x5f0 [ 143.757142][ T3508] dev_hard_start_xmit+0xe5/0x370 [ 143.762405][ T3508] __dev_queue_xmit+0x1dec/0x31f0 [ 143.767659][ T3508] neigh_connected_output+0x56e/0x5d0 [ 143.773192][ T3508] ip_finish_output2+0x182e/0x1a50 [ 143.778688][ T3508] __ip_finish_output+0x266/0x720 [ 143.783864][ T3508] ip_finish_output+0x3d1/0x400 [ 143.788954][ T3508] ip_output+0x258/0x510 [ 143.793315][ T3508] ip_send_skb+0x10c/0x2a0 [ 143.797918][ T3508] udp_send_skb+0xfae/0x17a0 [ 143.802640][ T3508] udp_sendmsg+0x3443/0x3610 [ 143.807467][ T3508] inet_sendmsg+0x101/0x180 [ 143.812101][ T3508] ____sys_sendmsg+0xa8e/0xe70 [ 143.817120][ T3508] ___sys_sendmsg+0x2a1/0x3f0 [ 143.821941][ T3508] __sys_sendmmsg+0x40d/0xa40 [ 143.826885][ T3508] __x64_sys_sendmmsg+0xb8/0x120 [ 143.831998][ T3508] do_syscall_64+0x3d/0xb0 [ 143.836770][ T3508] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 143.842832][ T3508] [ 143.845186][ T3508] Uninit was created at: [ 143.849762][ T3508] __kmem_cache_alloc_node+0x6ee/0xc90 [ 143.855445][ T3508] __kmalloc_node_track_caller+0x117/0x3d0 [ 143.861562][ T3508] __alloc_skb+0x34a/0xca0 [ 143.866119][ T3508] alloc_skb_with_frags+0xb9/0xba0 [ 143.871527][ T3508] sock_alloc_send_pskb+0xaa8/0xc30 [ 143.876992][ T3508] __ip_append_data+0x4439/0x63c0 [ 143.882178][ T3508] ip_make_skb+0x1ea/0x640 [ 143.886819][ T3508] udp_sendmsg+0x32e6/0x3610 [ 143.891541][ T3508] inet_sendmsg+0x101/0x180 [ 143.896146][ T3508] ____sys_sendmsg+0xa8e/0xe70 [ 143.901194][ T3508] ___sys_sendmsg+0x2a1/0x3f0 [ 143.906073][ T3508] __sys_sendmmsg+0x40d/0xa40 [ 143.911026][ T3508] __x64_sys_sendmmsg+0xb8/0x120 [ 143.916127][ T3508] do_syscall_64+0x3d/0xb0 [ 143.920890][ T3508] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 143.927063][ T3508] [ 143.929446][ T3508] Bytes 24-31 of 60 are uninitialized [ 143.934964][ T3508] Memory access of size 60 starts at ffff88810f957ca0 [ 143.941927][ T3508] [ 143.944329][ T3508] CPU: 1 PID: 3508 Comm: syz-executor113 Not tainted 6.1.0-rc4-syzkaller-62821-gcb231e2f67ec #0 [ 143.955332][ T3508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 143.965563][ T3508] ===================================================== [ 143.972658][ T3508] Disabling lock debugging due to kernel taint [ 143.978981][ T3508] Kernel panic - not syncing: kmsan.panic set ... [ 143.985663][ T3508] CPU: 1 PID: 3508 Comm: syz-executor113 Tainted: G B 6.1.0-rc4-syzkaller-62821-gcb231e2f67ec #0 [ 143.997664][ T3508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 144.007876][ T3508] Call Trace: [ 144.011205][ T3508] [ 144.014195][ T3508] dump_stack_lvl+0x1c8/0x256 [ 144.019007][ T3508] dump_stack+0x1a/0x1d [ 144.023253][ T3508] panic+0x4d3/0xc64 [ 144.027290][ T3508] ? add_taint+0x104/0x1a0 [ 144.031871][ T3508] kmsan_report+0x2ca/0x2d0 [ 144.036541][ T3508] ? kmsan_internal_poison_memory+0x78/0x90 [ 144.042571][ T3508] ? kmsan_internal_set_shadow_origin+0x62/0xe0 [ 144.048932][ T3508] ? kmsan_internal_check_memory+0x1aa/0x530 [ 144.055098][ T3508] ? kmsan_handle_skb+0x2a/0x60 [ 144.060187][ T3508] ? xmit_one+0x100/0x5f0 [ 144.064614][ T3508] ? dev_hard_start_xmit+0xe5/0x370 [ 144.070598][ T3508] ? __dev_queue_xmit+0x1dec/0x31f0 [ 144.075970][ T3508] ? neigh_connected_output+0x56e/0x5d0 [ 144.081625][ T3508] ? ip_finish_output2+0x182e/0x1a50 [ 144.087024][ T3508] ? __ip_finish_output+0x266/0x720 [ 144.092372][ T3508] ? ip_finish_output+0x3d1/0x400 [ 144.097522][ T3508] ? ip_output+0x258/0x510 [ 144.102060][ T3508] ? ip_send_skb+0x10c/0x2a0 [ 144.106739][ T3508] ? udp_send_skb+0xfae/0x17a0 [ 144.111656][ T3508] ? udp_sendmsg+0x3443/0x3610 [ 144.116521][ T3508] ? inet_sendmsg+0x101/0x180 [ 144.121316][ T3508] ? ____sys_sendmsg+0xa8e/0xe70 [ 144.126371][ T3508] ? ___sys_sendmsg+0x2a1/0x3f0 [ 144.131380][ T3508] ? __sys_sendmmsg+0x40d/0xa40 [ 144.136380][ T3508] ? __x64_sys_sendmmsg+0xb8/0x120 [ 144.141646][ T3508] ? do_syscall_64+0x3d/0xb0 [ 144.146338][ T3508] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 144.152576][ T3508] ? do_syscall_64+0x3d/0xb0 [ 144.157258][ T3508] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 144.163514][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.169492][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.175409][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.181324][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.187281][ T3508] ? validate_xmit_xfrm+0x95/0x1ad0 [ 144.192624][ T3508] kmsan_internal_check_memory+0x1aa/0x530 [ 144.198549][ T3508] kmsan_handle_skb+0x2a/0x60 [ 144.203340][ T3508] xmit_one+0x100/0x5f0 [ 144.207633][ T3508] dev_hard_start_xmit+0xe5/0x370 [ 144.212766][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.218748][ T3508] __dev_queue_xmit+0x1dec/0x31f0 [ 144.223942][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.229920][ T3508] neigh_connected_output+0x56e/0x5d0 [ 144.235463][ T3508] ? ipgre_tunnel_ctl+0x1120/0x1120 [ 144.240797][ T3508] ? neigh_event_send+0x1e0/0x1e0 [ 144.246425][ T3508] ip_finish_output2+0x182e/0x1a50 [ 144.251780][ T3508] __ip_finish_output+0x266/0x720 [ 144.256964][ T3508] ip_finish_output+0x3d1/0x400 [ 144.262030][ T3508] ? __rcu_read_unlock+0x76/0xd0 [ 144.267245][ T3508] ip_output+0x258/0x510 [ 144.271619][ T3508] ? ip_mc_finish_output+0x700/0x700 [ 144.277015][ T3508] ? ip_finish_output+0x400/0x400 [ 144.282188][ T3508] ip_send_skb+0x10c/0x2a0 [ 144.286837][ T3508] udp_send_skb+0xfae/0x17a0 [ 144.291643][ T3508] udp_sendmsg+0x3443/0x3610 [ 144.296378][ T3508] ? ip_skb_dst_mtu+0xcb0/0xcb0 [ 144.301382][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.307321][ T3508] ? udp_cmsg_send+0x640/0x640 [ 144.312194][ T3508] ? udp_cmsg_send+0x640/0x640 [ 144.317091][ T3508] inet_sendmsg+0x101/0x180 [ 144.321708][ T3508] ? inet_send_prepare+0x5b0/0x5b0 [ 144.326945][ T3508] ____sys_sendmsg+0xa8e/0xe70 [ 144.331864][ T3508] ___sys_sendmsg+0x2a1/0x3f0 [ 144.336694][ T3508] ? filter_irq_stacks+0x5c/0x1a0 [ 144.341896][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.347854][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.353763][ T3508] __sys_sendmmsg+0x40d/0xa40 [ 144.358590][ T3508] ? preempt_count_sub+0x7d/0x280 [ 144.363765][ T3508] ? _raw_spin_unlock_irq+0x26/0x40 [ 144.369075][ T3508] ? kmsan_get_shadow_origin_ptr+0x49/0xa0 [ 144.374994][ T3508] __x64_sys_sendmmsg+0xb8/0x120 [ 144.380076][ T3508] do_syscall_64+0x3d/0xb0 [ 144.384777][ T3508] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 144.390905][ T3508] RIP: 0033:0x7f94e25f0c69 [ 144.395379][ T3508] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 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 c0 ff ff ff f7 d8 64 89 01 48 [ 144.415106][ T3508] RSP: 002b:00007ffcd84872d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 144.423651][ T3508] RAX: ffffffffffffffda RBX: 00007ffcd8487300 RCX: 00007f94e25f0c69 [ 144.431800][ T3508] RDX: 000000000000022d RSI: 0000000020007fc0 RDI: 0000000000000003 [ 144.439898][ T3508] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 144.447978][ T3508] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcd84872f0 [ 144.456048][ T3508] R13: 00000000000f4240 R14: 000000000002306f R15: 00007ffcd84872e4 [ 144.464109][ T3508] [ 144.467265][ T3508] Kernel Offset: disabled [ 144.471643][ T3508] Rebooting in 86400 seconds..