./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor369862490 <...> Warning: Permanently added '10.128.1.126' (ED25519) to the list of known hosts. execve("./syz-executor369862490", ["./syz-executor369862490"], 0x7fff331b9410 /* 10 vars */) = 0 brk(NULL) = 0x55558be32000 brk(0x55558be32d00) = 0x55558be32d00 arch_prctl(ARCH_SET_FS, 0x55558be32380) = 0 set_tid_address(0x55558be32650) = 5017 set_robust_list(0x55558be32660, 24) = 0 rseq(0x55558be32ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor369862490", 4096) = 27 getrandom("\xf4\x2a\x99\x58\x22\x30\x28\x6d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558be32d00 brk(0x55558be53d00) = 0x55558be53d00 brk(0x55558be54000) = 0x55558be54000 mprotect(0x7fb10818f000, 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=0x55558be32650) = 5018 ./strace-static-x86_64: Process 5018 attached [pid 5018] set_robust_list(0x55558be32660, 24) = 0 [pid 5018] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5018] setpgid(0, 0) = 0 [pid 5018] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "1000", 4) = 4 [pid 5018] close(3) = 0 [pid 5018] socket(AF_NETLINK, SOCK_DGRAM|SOCK_CLOEXEC, NETLINK_ROUTE) = 3 [pid 5018] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x78\x00\x00\x00\x30\x00\x1b\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x64\x00\x01\x00\x60\x00\x01\x00\x0b\x00\x01\x00\x73\x6b\x62\x6d\x6f\x64\x00\x00\x34\x00\x02\x80\x0a\x00\x03\x00\xbb\xbb\xbb\xbb\xbb\xbb\x00\x00\x24\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=120}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 120 [pid 5018] sendto(3, [{nlmsg_len=36, nlmsg_type=RTM_NEWLINK, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, {ifi_family=AF_AX25, ifi_type=ARPHRD_NETROM, ifi_index=131087, ifi_flags=IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_PROMISC|IFF_MASTER|IFF_SLAVE|IFF_AUTOMEDIA|IFF_LOWER_UP|IFF_DORMANT|0x5f400000, ifi_change=0x54454e50}, {nla_len=17481, nla_type=IFLA_UNSPEC}], 36, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 36 [ 159.523770][ T5018] netlink: 28 bytes leftover after parsing attributes in process `syz-executor369'. [ 159.535564][ T5018] netlink: 28 bytes leftover after parsing attributes in process `syz-executor369'. [ 159.557382][ T5018] netlink: 4 bytes leftover after parsing attributes in process `syz-executor369'. [ 159.568899][ T5018] ===================================================== [ 159.577456][ T5018] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 [ 159.586361][ T5018] _copy_to_iter+0x366/0x2520 [ 159.591459][ T5018] __skb_datagram_iter+0x185/0x1000 [ 159.597583][ T5018] skb_copy_datagram_iter+0x5c/0x200 [ 159.603336][ T5018] netlink_recvmsg+0x432/0x1610 [ 159.608683][ T5018] sock_recvmsg+0x2c4/0x340 [ 159.613668][ T5018] __sys_recvfrom+0x35a/0x5f0 [ 159.619146][ T5018] __x64_sys_recvfrom+0x126/0x1d0 [ 159.624503][ T5018] do_syscall_64+0xd5/0x1f0 [ 159.629659][ T5018] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 159.636588][ T5018] [ 159.639131][ T5018] Uninit was stored to memory at: [ 159.644578][ T5018] pskb_expand_head+0x30f/0x19d0 [ 159.649915][ T5018] netlink_trim+0x2c2/0x330 [ 159.654672][ T5018] netlink_unicast+0x9f/0x1260 [ 159.659614][ T5018] nlmsg_notify+0x21d/0x2f0 [ 159.664505][ T5018] rtnetlink_send+0x73/0x90 [ 159.669523][ T5018] tc_ctl_action+0x146e/0x19d0 [ 159.674648][ T5018] rtnetlink_rcv_msg+0x1737/0x1900 [ 159.680088][ T5018] netlink_rcv_skb+0x375/0x650 [ 159.685206][ T5018] rtnetlink_rcv+0x34/0x40 [ 159.689982][ T5018] netlink_unicast+0xf4c/0x1260 [ 159.695151][ T5018] netlink_sendmsg+0x10df/0x11f0 [ 159.701533][ T5018] __sock_sendmsg+0x30f/0x380 [ 159.706615][ T5018] ____sys_sendmsg+0x877/0xb60 [ 159.711922][ T5018] ___sys_sendmsg+0x28d/0x3c0 [ 159.717537][ T5018] __x64_sys_sendmsg+0x307/0x4a0 [ 159.723352][ T5018] do_syscall_64+0xd5/0x1f0 [ 159.728169][ T5018] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 159.734598][ T5018] [ 159.737206][ T5018] Uninit was stored to memory at: [ 159.742698][ T5018] nla_put+0x1c6/0x230 [ 159.747004][ T5018] tcf_skbmod_dump+0x23f/0xc20 [ 159.752219][ T5018] tcf_action_dump_1+0x85e/0x970 [ 159.757338][ T5018] tcf_action_dump+0x1fd/0x460 [ 159.762356][ T5018] tca_get_fill+0x519/0x7a0 [ 159.767243][ T5018] tc_ctl_action+0x1365/0x19d0 [ 159.772460][ T5018] rtnetlink_rcv_msg+0x1737/0x1900 [ 159.777892][ T5018] netlink_rcv_skb+0x375/0x650 [ 159.783354][ T5018] rtnetlink_rcv+0x34/0x40 [ 159.788137][ T5018] netlink_unicast+0xf4c/0x1260 [ 159.793676][ T5018] netlink_sendmsg+0x10df/0x11f0 [ 159.798921][ T5018] __sock_sendmsg+0x30f/0x380 [ 159.803877][ T5018] ____sys_sendmsg+0x877/0xb60 [ 159.809146][ T5018] ___sys_sendmsg+0x28d/0x3c0 [ 159.814136][ T5018] __x64_sys_sendmsg+0x307/0x4a0 [ 159.819322][ T5018] do_syscall_64+0xd5/0x1f0 [ 159.825446][ T5018] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 159.832010][ T5018] [ 159.834563][ T5018] Local variable opt created at: [ 159.839706][ T5018] tcf_skbmod_dump+0x9d/0xc20 [ 159.844897][ T5018] tcf_action_dump_1+0x85e/0x970 [ 159.850189][ T5018] [ 159.852825][ T5018] Bytes 188-191 of 248 are uninitialized [ 159.858682][ T5018] Memory access of size 248 starts at ffff888117697680 [ 159.866018][ T5018] Data copied to user address 00007ffe56d855f0 [ 159.872619][ T5018] [ 159.875067][ T5018] CPU: 1 PID: 5018 Comm: syz-executor369 Not tainted 6.9.0-rc1-syzkaller-00178-g317c7bc0ef03 #0 [ 159.886151][ T5018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 159.896605][ T5018] ===================================================== [ 159.903756][ T5018] Disabling lock debugging due to kernel taint [ 159.910550][ T5018] Kernel panic - not syncing: kmsan.panic set ... [ 159.917125][ T5018] CPU: 1 PID: 5018 Comm: syz-executor369 Tainted: G B 6.9.0-rc1-syzkaller-00178-g317c7bc0ef03 #0 [ 159.929420][ T5018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 159.939909][ T5018] Call Trace: [ 159.944148][ T5018] [ 159.947263][ T5018] dump_stack_lvl+0x216/0x2d0 [ 159.952167][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 159.958189][ T5018] dump_stack+0x1e/0x30 [ 159.962537][ T5018] panic+0x4e2/0xcd0 [ 159.966721][ T5018] ? kmsan_get_metadata+0xc1/0x1d0 [ 159.972270][ T5018] kmsan_report+0x2d5/0x2e0 [ 159.977043][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 159.982801][ T5018] ? kmsan_internal_check_memory+0x1af/0x560 [ 159.989269][ T5018] ? kmsan_copy_to_user+0xd5/0xf0 [ 159.994860][ T5018] ? _copy_to_iter+0x366/0x2520 [ 160.000204][ T5018] ? __skb_datagram_iter+0x185/0x1000 [ 160.006058][ T5018] ? skb_copy_datagram_iter+0x5c/0x200 [ 160.011774][ T5018] ? netlink_recvmsg+0x432/0x1610 [ 160.017048][ T5018] ? sock_recvmsg+0x2c4/0x340 [ 160.021882][ T5018] ? __sys_recvfrom+0x35a/0x5f0 [ 160.027186][ T5018] ? __x64_sys_recvfrom+0x126/0x1d0 [ 160.032601][ T5018] ? do_syscall_64+0xd5/0x1f0 [ 160.037928][ T5018] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 160.044341][ T5018] ? __update_load_avg_cfs_rq+0x969/0x10e0 [ 160.050586][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 160.056132][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.062702][ T5018] ? __update_load_avg_cfs_rq+0x121/0x10e0 [ 160.068873][ T5018] ? update_load_avg+0x1865/0x29b0 [ 160.074291][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 160.079988][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.086161][ T5018] kmsan_internal_check_memory+0x1af/0x560 [ 160.092853][ T5018] kmsan_copy_to_user+0xd5/0xf0 [ 160.098618][ T5018] ? should_fail_usercopy+0x2e/0x40 [ 160.104436][ T5018] _copy_to_iter+0x366/0x2520 [ 160.109471][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 160.115031][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.121361][ T5018] ? __skb_try_recv_from_queue+0x62f/0xcd0 [ 160.127555][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 160.133093][ T5018] ? kmsan_get_metadata+0xc1/0x1d0 [ 160.138777][ T5018] ? __pfx_simple_copy_to_iter+0x10/0x10 [ 160.146039][ T5018] __skb_datagram_iter+0x185/0x1000 [ 160.151422][ T5018] ? __pfx_simple_copy_to_iter+0x10/0x10 [ 160.157579][ T5018] skb_copy_datagram_iter+0x5c/0x200 [ 160.163214][ T5018] netlink_recvmsg+0x432/0x1610 [ 160.168484][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 160.173977][ T5018] ? __pfx_netlink_recvmsg+0x10/0x10 [ 160.179515][ T5018] ? __pfx_netlink_recvmsg+0x10/0x10 [ 160.185385][ T5018] sock_recvmsg+0x2c4/0x340 [ 160.190055][ T5018] __sys_recvfrom+0x35a/0x5f0 [ 160.194925][ T5018] ? kmsan_get_metadata+0x146/0x1d0 [ 160.200351][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.206832][ T5018] __x64_sys_recvfrom+0x126/0x1d0 [ 160.212178][ T5018] do_syscall_64+0xd5/0x1f0 [ 160.216895][ T5018] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 160.223124][ T5018] RIP: 0033:0x7fb10811e049 [ 160.227804][ T5018] Code: ff e8 cb 01 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d 41 60 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 [ 160.247847][ T5018] RSP: 002b:00007ffe56d85578 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 160.256985][ T5018] RAX: ffffffffffffffda RBX: 00007ffe56d85604 RCX: 00007fb10811e049 [ 160.265228][ T5018] RDX: 0000000000001000 RSI: 00007ffe56d855f0 RDI: 0000000000000003 [ 160.273435][ T5018] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 160.281744][ T5018] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe56d855f0 [ 160.289974][ T5018] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 160.298176][ T5018] [ 160.302032][ T5018] Kernel Offset: disabled [ 160.306594][ T5018] Rebooting in 86400 seconds..