./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor286253252 <...> Warning: Permanently added '10.128.1.109' (ED25519) to the list of known hosts. execve("./syz-executor286253252", ["./syz-executor286253252"], 0x7ffec8cae180 /* 10 vars */) = 0 brk(NULL) = 0x5555560bb000 brk(0x5555560bbd00) = 0x5555560bbd00 arch_prctl(ARCH_SET_FS, 0x5555560bb380) = 0 set_tid_address(0x5555560bb650) = 5005 set_robust_list(0x5555560bb660, 24) = 0 rseq(0x5555560bbca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor286253252", 4096) = 27 getrandom("\x5f\x72\x0a\xa8\x77\xf1\x6a\xcc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555560bbd00 brk(0x5555560dcd00) = 0x5555560dcd00 brk(0x5555560dd000) = 0x5555560dd000 mprotect(0x7fa807e1c000, 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=0x5555560bb650) = 5006 ./strace-static-x86_64: Process 5006 attached [pid 5006] set_robust_list(0x5555560bb660, 24) = 0 [pid 5006] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5006] setpgid(0, 0) = 0 [pid 5006] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5006] write(3, "1000", 4) = 4 [pid 5006] close(3) = 0 [pid 5006] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5006] sendto(3, [{nlmsg_len=32, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x03\x00\x00\x00\x09\x00\x02\x00\x54\x49\x50\x43\x00\x00\x00\x00"], 32, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 32 [pid 5006] recvfrom(3, [{nlmsg_len=88, nlmsg_type=nlctrl, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=5006}, "\x01\x02\x00\x00\x09\x00\x02\x00\x54\x49\x50\x43\x00\x00\x00\x00\x06\x00\x01\x00\x33\x00\x00\x00\x08\x00\x03\x00\x01\x00\x00\x00\x08\x00\x04\x00\x08\x00\x00\x00\x08\x00\x05\x00\x00\x00\x00\x00\x18\x00\x06\x00\x14\x00\x01\x00\x08\x00\x01\x00\x01\x00\x00\x00\x08\x00\x02\x00\x02\x00\x00\x00"], 4096, 0, NULL, NULL) = 88 [pid 5006] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5006}, {error=0, msg={nlmsg_len=32, nlmsg_type=nlctrl, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 [pid 5006] close(3) = 0 [pid 5006] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5006] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x30\x00\x00\x00\x33\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x09\x41\x00\x00\x00\x14\x00\x18\x00\x00\x00\x00\x69\x62\x3a\x77\x6c\x61\x6e\x30\x00\x00\x00\x00", iov_len=48}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 48 [pid 5006] sendto(3, [{nlmsg_len=32, nlmsg_type=nlctrl, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x03\x00\x00\x00\x09\x00\x02\x00\x54\x49\x50\x43\x00\x00\x00\x00"], 32, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 32 [ 156.017024][ T5006] ===================================================== [ 156.024549][ T5006] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x364/0x2520 [ 156.033696][ T5006] _copy_to_iter+0x364/0x2520 [ 156.038596][ T5006] simple_copy_to_iter+0x68/0xa0 [ 156.043795][ T5006] __skb_datagram_iter+0x123/0xdc0 [ 156.049292][ T5006] skb_copy_datagram_iter+0x5c/0x200 [ 156.054783][ T5006] netlink_recvmsg+0x432/0x1600 [ 156.059863][ T5006] __sys_recvfrom+0x505/0x810 [ 156.064731][ T5006] __x64_sys_recvfrom+0x126/0x1d0 [ 156.070092][ T5006] do_syscall_64+0x44/0x110 [ 156.074829][ T5006] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.081032][ T5006] [ 156.083453][ T5006] Uninit was created at: [ 156.087919][ T5006] slab_post_alloc_hook+0x129/0xa70 [ 156.093890][ T5006] kmem_cache_alloc_node+0x5e9/0xb10 [ 156.099420][ T5006] kmalloc_reserve+0x13d/0x4a0 [ 156.104273][ T5006] __alloc_skb+0x318/0x740 [ 156.108805][ T5006] tipc_get_err_tlv+0x83/0x5a0 [ 156.113908][ T5006] tipc_nl_compat_recv+0x1035/0x15f0 [ 156.119465][ T5006] genl_rcv_msg+0x11ec/0x1290 [ 156.124304][ T5006] netlink_rcv_skb+0x371/0x650 [ 156.129446][ T5006] genl_rcv+0x40/0x60 [ 156.133590][ T5006] netlink_unicast+0xf47/0x1250 [ 156.138585][ T5006] netlink_sendmsg+0x1238/0x13d0 [ 156.143751][ T5006] ____sys_sendmsg+0x9c2/0xd60 [ 156.148707][ T5006] ___sys_sendmsg+0x28d/0x3c0 [ 156.153726][ T5006] __x64_sys_sendmsg+0x307/0x490 [ 156.158850][ T5006] do_syscall_64+0x44/0x110 [ 156.163594][ T5006] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.169956][ T5006] [ 156.172386][ T5006] Bytes 34-35 of 36 are uninitialized [ 156.177882][ T5006] Memory access of size 36 starts at ffff8881152e5680 [ 156.185021][ T5006] Data copied to user address 00007ffc9a4a12a0 [ 156.191338][ T5006] [ 156.193716][ T5006] CPU: 0 PID: 5006 Comm: syz-executor286 Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 [ 156.204055][ T5006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 156.214392][ T5006] ===================================================== [ 156.221585][ T5006] Disabling lock debugging due to kernel taint [ 156.227830][ T5006] Kernel panic - not syncing: kmsan.panic set ... [ 156.234342][ T5006] CPU: 0 PID: 5006 Comm: syz-executor286 Tainted: G B 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 [ 156.246027][ T5006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 156.256183][ T5006] Call Trace: [ 156.259586][ T5006] [ 156.262640][ T5006] dump_stack_lvl+0x1bf/0x240 [ 156.267488][ T5006] dump_stack+0x1e/0x20 [ 156.271790][ T5006] panic+0x4de/0xc90 [ 156.275863][ T5006] ? add_taint+0x108/0x1a0 [ 156.280507][ T5006] kmsan_report+0x2d0/0x2d0 [ 156.285233][ T5006] ? kmsan_internal_check_memory+0x476/0x530 [ 156.291432][ T5006] ? kmsan_copy_to_user+0xd3/0xf0 [ 156.296660][ T5006] ? _copy_to_iter+0x364/0x2520 [ 156.301754][ T5006] ? simple_copy_to_iter+0x68/0xa0 [ 156.307081][ T5006] ? __skb_datagram_iter+0x123/0xdc0 [ 156.312510][ T5006] ? skb_copy_datagram_iter+0x5c/0x200 [ 156.318124][ T5006] ? netlink_recvmsg+0x432/0x1600 [ 156.323329][ T5006] ? __sys_recvfrom+0x505/0x810 [ 156.328366][ T5006] ? __x64_sys_recvfrom+0x126/0x1d0 [ 156.333759][ T5006] ? do_syscall_64+0x44/0x110 [ 156.338578][ T5006] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.344846][ T5006] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 156.350879][ T5006] ? __update_load_avg_cfs_rq+0x121/0x10e0 [ 156.356995][ T5006] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 156.363074][ T5006] kmsan_internal_check_memory+0x476/0x530 [ 156.369137][ T5006] kmsan_copy_to_user+0xd3/0xf0 [ 156.374218][ T5006] ? should_fail_usercopy+0x2e/0x40 [ 156.379588][ T5006] _copy_to_iter+0x364/0x2520 [ 156.384435][ T5006] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 156.390445][ T5006] ? __skb_try_recv_from_queue+0x62f/0xcd0 [ 156.396534][ T5006] simple_copy_to_iter+0x68/0xa0 [ 156.401720][ T5006] __skb_datagram_iter+0x123/0xdc0 [ 156.407073][ T5006] ? skb_copy_datagram_iter+0x200/0x200 [ 156.412847][ T5006] skb_copy_datagram_iter+0x5c/0x200 [ 156.418305][ T5006] netlink_recvmsg+0x432/0x1600 [ 156.423385][ T5006] ? netlink_sendmsg+0x13d0/0x13d0 [ 156.428711][ T5006] __sys_recvfrom+0x505/0x810 [ 156.433587][ T5006] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 156.439625][ T5006] __x64_sys_recvfrom+0x126/0x1d0 [ 156.444867][ T5006] do_syscall_64+0x44/0x110 [ 156.449605][ T5006] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.455738][ T5006] RIP: 0033:0x7fa807dab109 [ 156.460262][ T5006] Code: ff e8 cb 01 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d a1 5f 07 00 00 41 89 ca 74 1c 45 31 c9 45 31 c0 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 67 c3 66 0f 1f 44 00 00 55 48 83 ec 20 48 89 [ 156.480033][ T5006] RSP: 002b:00007ffc9a4a1218 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 156.488623][ T5006] RAX: ffffffffffffffda RBX: 00007ffc9a4a12b4 RCX: 00007fa807dab109 [ 156.496724][ T5006] RDX: 0000000000001000 RSI: 00007ffc9a4a12a0 RDI: 0000000000000003 [ 156.504862][ T5006] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 156.512973][ T5006] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc9a4a12a0 [ 156.521116][ T5006] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 156.529283][ T5006] [ 156.532769][ T5006] Kernel Offset: disabled [ 156.537154][ T5006] Rebooting in 86400 seconds..