./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1592217136 <...> Warning: Permanently added '10.128.1.46' (ED25519) to the list of known hosts. execve("./syz-executor1592217136", ["./syz-executor1592217136"], 0x7ffc51855510 /* 10 vars */) = 0 brk(NULL) = 0x55555623f000 brk(0x55555623fd00) = 0x55555623fd00 arch_prctl(ARCH_SET_FS, 0x55555623f380) = 0 set_tid_address(0x55555623f650) = 5003 set_robust_list(0x55555623f660, 24) = 0 rseq(0x55555623fca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1592217136", 4096) = 28 getrandom("\x62\x89\xcf\x84\xe1\x0d\xa8\x3b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555623fd00 brk(0x555556260d00) = 0x555556260d00 brk(0x555556261000) = 0x555556261000 mprotect(0x7f861b18b000, 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 5004 attached , child_tidptr=0x55555623f650) = 5004 [pid 5004] set_robust_list(0x55555623f660, 24) = 0 [pid 5004] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5004] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5004] setsid() = 1 [pid 5004] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5004] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5004] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5004] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5004] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5004] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5004] unshare(CLONE_NEWNS) = 0 [pid 5004] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5004] unshare(CLONE_NEWIPC) = 0 [pid 5004] unshare(CLONE_NEWCGROUP) = 0 [pid 5004] unshare(CLONE_NEWUTS) = 0 [pid 5004] unshare(CLONE_SYSVSEM) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "16777216", 8) = 8 [pid 5004] close(3) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "536870912", 9) = 9 [pid 5004] close(3) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "1024", 4) = 4 [pid 5004] close(3) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "8192", 4) = 4 [pid 5004] close(3) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "1024", 4) = 4 [pid 5004] close(3) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "1024", 4) = 4 [pid 5004] close(3) = 0 [pid 5004] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5004] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5004] close(3) = 0 [pid 5004] getpid() = 1 [pid 5004] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5032] set_robust_list(0x55555623f660, 24 [pid 5004] <... clone resumed>, child_tidptr=0x55555623f650) = 2 [pid 5032] <... set_robust_list resumed>) = 0 [pid 5032] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5032] setpgid(0, 0) = 0 [pid 5032] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5032] write(3, "1000", 4) = 4 [pid 5032] close(3) = 0 [pid 5032] socket(AF_PACKET, SOCK_RAW, 129) = 3 [pid 5032] socket(AF_PACKET, SOCK_RAW, 129) = 4 [pid 5032] ioctl(4, SIOCGIFINDEX, {ifr_name="bond0", ifr_ifindex=14}) = 0 [pid 5032] bind(3, {sa_family=AF_PACKET, sll_protocol=htons(0 /* ETH_P_??? */), sll_ifindex=if_nametoindex("tunl0"), sll_hatype=ARPHRD_ETHER, sll_pkttype=PACKET_HOST, sll_halen=6, sll_addr=[0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 00]}, 20) = 0 [pid 5032] setsockopt(3, SOL_PACKET, PACKET_VNET_HDR, [32779], 4) = 0 [ 165.838913][ T5032] ===================================================== [ 165.846285][ T5032] BUG: KMSAN: uninit-value in netif_skb_features+0xb44/0x1310 [ 165.854085][ T5032] netif_skb_features+0xb44/0x1310 [ 165.859466][ T5032] validate_xmit_skb+0x45/0x1930 [ 165.864907][ T5032] __dev_queue_xmit+0x1eac/0x5130 [ 165.870148][ T5032] packet_xmit+0x9c/0x6b0 [ 165.874886][ T5032] packet_sendmsg+0x8b1d/0x9f30 [ 165.879916][ T5032] ____sys_sendmsg+0x9c2/0xd60 [ 165.884943][ T5032] ___sys_sendmsg+0x28d/0x3c0 [ 165.889835][ T5032] __x64_sys_sendmsg+0x307/0x490 [ 165.895132][ T5032] do_syscall_64+0x44/0x110 [ 165.899817][ T5032] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 165.906136][ T5032] [ 165.908578][ T5032] Uninit was created at: [ 165.913148][ T5032] slab_post_alloc_hook+0x129/0xa70 [ 165.918525][ T5032] kmem_cache_alloc_node+0x5e9/0xb10 [ 165.924071][ T5032] kmalloc_reserve+0x13d/0x4a0 [ 165.929059][ T5032] __alloc_skb+0x318/0x740 [ 165.933875][ T5032] alloc_skb_with_frags+0xc8/0xbd0 [ 165.939187][ T5032] sock_alloc_send_pskb+0xa80/0xbf0 [ 165.944754][ T5032] packet_sendmsg+0x70e8/0x9f30 [ 165.949795][ T5032] ____sys_sendmsg+0x9c2/0xd60 [ 165.954825][ T5032] ___sys_sendmsg+0x28d/0x3c0 [ 165.959821][ T5032] __x64_sys_sendmsg+0x307/0x490 [ 165.965192][ T5032] do_syscall_64+0x44/0x110 [ 165.969910][ T5032] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 165.976126][ T5032] [ 165.978558][ T5032] CPU: 1 PID: 5032 Comm: syz-executor159 Not tainted 6.7.0-rc3-syzkaller-00033-g3b47bc037bd4 #0 [ 165.989368][ T5032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 165.999733][ T5032] ===================================================== [ 166.006954][ T5032] Disabling lock debugging due to kernel taint [ 166.013318][ T5032] Kernel panic - not syncing: kmsan.panic set ... [ 166.019873][ T5032] CPU: 1 PID: 5032 Comm: syz-executor159 Tainted: G B 6.7.0-rc3-syzkaller-00033-g3b47bc037bd4 #0 [ 166.032003][ T5032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 166.042225][ T5032] Call Trace: [ 166.045609][ T5032] [ 166.048613][ T5032] dump_stack_lvl+0x1bf/0x240 [ 166.053498][ T5032] dump_stack+0x1e/0x20 [ 166.057834][ T5032] panic+0x4de/0xc90 [ 166.061915][ T5032] ? add_taint+0x108/0x1a0 [ 166.066551][ T5032] kmsan_report+0x2d0/0x2d0 [ 166.071305][ T5032] ? handle_mm_fault+0x23fa/0xc790 [ 166.076707][ T5032] ? __msan_warning+0x96/0x110 [ 166.081691][ T5032] ? netif_skb_features+0xb44/0x1310 [ 166.087214][ T5032] ? validate_xmit_skb+0x45/0x1930 [ 166.092602][ T5032] ? __dev_queue_xmit+0x1eac/0x5130 [ 166.097997][ T5032] ? packet_xmit+0x9c/0x6b0 [ 166.102715][ T5032] ? packet_sendmsg+0x8b1d/0x9f30 [ 166.107953][ T5032] ? ____sys_sendmsg+0x9c2/0xd60 [ 166.113060][ T5032] ? ___sys_sendmsg+0x28d/0x3c0 [ 166.118083][ T5032] ? __x64_sys_sendmsg+0x307/0x490 [ 166.123362][ T5032] ? do_syscall_64+0x44/0x110 [ 166.128160][ T5032] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 166.134424][ T5032] ? kmsan_internal_memmove_metadata+0x91/0x220 [ 166.140933][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.146969][ T5032] ? skb_copy_bits+0xc45/0xd30 [ 166.151914][ T5032] ? do_netdev_rx_csum_fault+0x60/0x60 [ 166.157569][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.163650][ T5032] ? do_netdev_rx_csum_fault+0x60/0x60 [ 166.169289][ T5032] __msan_warning+0x96/0x110 [ 166.174216][ T5032] netif_skb_features+0xb44/0x1310 [ 166.179598][ T5032] validate_xmit_skb+0x45/0x1930 [ 166.184825][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.190876][ T5032] __dev_queue_xmit+0x1eac/0x5130 [ 166.196071][ T5032] ? __dev_queue_xmit+0x34b/0x5130 [ 166.201385][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.207447][ T5032] packet_xmit+0x9c/0x6b0 [ 166.211910][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.217896][ T5032] packet_sendmsg+0x8b1d/0x9f30 [ 166.222968][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.229021][ T5032] ? aa_label_sk_perm+0x644/0x780 [ 166.234305][ T5032] ? filter_irq_stacks+0x60/0x1a0 [ 166.239510][ T5032] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 166.245925][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.252100][ T5032] ? packet_getsockopt+0xfb0/0xfb0 [ 166.257424][ T5032] ____sys_sendmsg+0x9c2/0xd60 [ 166.262450][ T5032] ___sys_sendmsg+0x28d/0x3c0 [ 166.267409][ T5032] ? filter_irq_stacks+0x60/0x1a0 [ 166.272678][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.278748][ T5032] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 166.284824][ T5032] __x64_sys_sendmsg+0x307/0x490 [ 166.289932][ T5032] do_syscall_64+0x44/0x110 [ 166.294553][ T5032] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 166.300597][ T5032] RIP: 0033:0x7f861b112be9 [ 166.305171][ T5032] 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 [ 166.324980][ T5032] RSP: 002b:00007ffc10d825b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 166.333685][ T5032] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f861b112be9 [ 166.341818][ T5032] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 166.349908][ T5032] RBP: 00000000000f4240 R08: 0000000100000000 R09: 0000000100000000 [ 166.358028][ T5032] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc10d82610 [ 166.366119][ T5032] R13: 0000000000000001 R14: 00007ffc10d82610 R15: 0000000000000003 [ 166.374274][ T5032] [ 166.377785][ T5032] Kernel Offset: disabled [ 166.382180][ T5032] Rebooting in 86400 seconds..