./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3553550660 <...> [ 105.985118][ T4616] 8021q: adding VLAN 0 to HW filter on device bond0 [ 106.033205][ T4616] eql: remember to turn off Van-Jacobson compression on your slave devices [ 106.383175][ T9] cfg80211: failed to load regulatory.db Starting sshd: [ 108.194432][ T4700] sshd (4700) used greatest stack depth: 4848 bytes left OK syzkaller Warning: Permanently added '10.128.1.6' (ECDSA) to the list of known hosts. execve("./syz-executor3553550660", ["./syz-executor3553550660"], 0x7ffdb53eef60 /* 10 vars */) = 0 brk(NULL) = 0x555555c57000 brk(0x555555c57c40) = 0x555555c57c40 arch_prctl(ARCH_SET_FS, 0x555555c57300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3553550660", 4096) = 28 brk(0x555555c78c40) = 0x555555c78c40 brk(0x555555c79000) = 0x555555c79000 mprotect(0x7f4f0db0f000, 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=0x555555c575d0) = 4954 ./strace-static-x86_64: Process 4954 attached [pid 4954] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4954] setpgid(0, 0) = 0 [pid 4954] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 4954] write(3, "1000", 4) = 4 [pid 4954] close(3) = 0 [pid 4954] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3 [pid 4954] socketpair(AF_UNIX, SOCK_STREAM, 0, [4, 5]) = 0 [pid 4954] ioctl(5, SIOCGIFINDEX, {ifr_name="lo", ifr_ifindex=1}) = 0 [pid 4954] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x78\x00\x00\x00\x24\x00\x0b\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x60\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00\x0a\x00\x01\x00\x6e\x65\x74\x65\x6d\x00\x00\x00\x48\x00\x02\x00\x00\x00\x00\x00\x86\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\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 4954] socket(AF_INET6, SOCK_STREAM, IPPROTO_SCTP) = 6 [pid 4954] setsockopt(6, SOL_SCTP, SCTP_PEER_ADDR_PARAMS, "\x00\x00\x00\x00\x0a\x00\x4e\x20\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10\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\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"..., 156) = 0 [pid 4954] bind(6, {sa_family=AF_INET6, sin6_port=htons(20003), sin6_flowinfo=htonl(0), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_scope_id=0}, 28) = 0 syzkaller login: [ 154.986554][ T4954] netlink: 44 bytes leftover after parsing attributes in process `syz-executor355'. [ 155.068350][ T4954] ===================================================== [ 155.075797][ T4954] BUG: KMSAN: uninit-value in sctp_inq_pop+0x1597/0x1910 [ 155.083107][ T4954] sctp_inq_pop+0x1597/0x1910 [ 155.088016][ T4954] sctp_assoc_bh_rcv+0x1a7/0xc50 [ 155.093332][ T4954] sctp_inq_push+0x23e/0x2b0 [ 155.098146][ T4954] sctp_backlog_rcv+0x394/0xd80 [ 155.103344][ T4954] __release_sock+0x207/0x570 [ 155.108290][ T4954] release_sock+0x6b/0x1e0 [ 155.112991][ T4954] sctp_wait_for_connect+0x486/0x810 [ 155.118461][ T4954] sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 [ 155.124196][ T4954] sctp_sendmsg+0x32b4/0x4a70 [ 155.129023][ T4954] inet_sendmsg+0x105/0x190 [ 155.133770][ T4954] __sys_sendto+0x76c/0xa10 [ 155.138503][ T4954] __x64_sys_sendto+0x125/0x1c0 [ 155.143700][ T4954] do_syscall_64+0x41/0xc0 [ 155.148273][ T4954] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 155.154524][ T4954] [ 155.156923][ T4954] Uninit was stored to memory at: [ 155.162314][ T4954] sctp_inq_pop+0x151a/0x1910 [ 155.167200][ T4954] sctp_assoc_bh_rcv+0x1a7/0xc50 [ 155.172509][ T4954] sctp_inq_push+0x23e/0x2b0 [ 155.177284][ T4954] sctp_backlog_rcv+0x394/0xd80 [ 155.182758][ T4954] __release_sock+0x207/0x570 [ 155.188482][ T4954] release_sock+0x6b/0x1e0 [ 155.193146][ T4954] sctp_wait_for_connect+0x486/0x810 [ 155.198643][ T4954] sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 [ 155.204358][ T4954] sctp_sendmsg+0x32b4/0x4a70 [ 155.209189][ T4954] inet_sendmsg+0x105/0x190 [ 155.213964][ T4954] __sys_sendto+0x76c/0xa10 [ 155.218609][ T4954] __x64_sys_sendto+0x125/0x1c0 [ 155.223714][ T4954] do_syscall_64+0x41/0xc0 [ 155.228254][ T4954] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 155.234382][ T4954] [ 155.236796][ T4954] Uninit was created at: [ 155.241358][ T4954] slab_post_alloc_hook+0x12d/0xb60 [ 155.246752][ T4954] __kmem_cache_alloc_node+0x4ff/0x8b0 [ 155.252567][ T4954] __kmalloc_node_track_caller+0x118/0x3c0 [ 155.258595][ T4954] kmalloc_reserve+0x248/0x470 [ 155.263561][ T4954] __alloc_skb+0x318/0x740 [ 155.268252][ T4954] sctp_packet_transmit+0x1729/0x4150 [ 155.275170][ T4954] sctp_outq_flush+0x1cde/0x5e70 [ 155.281319][ T4954] sctp_outq_uncork+0x9c/0xb0 [ 155.286140][ T4954] sctp_do_sm+0x8c1a/0x9380 [ 155.290920][ T4954] sctp_assoc_bh_rcv+0x8fe/0xc50 [ 155.296346][ T4954] sctp_inq_push+0x23e/0x2b0 [ 155.301424][ T4954] sctp_backlog_rcv+0x394/0xd80 [ 155.306531][ T4954] __release_sock+0x207/0x570 [ 155.311626][ T4954] release_sock+0x6b/0x1e0 [ 155.316475][ T4954] sctp_wait_for_connect+0x486/0x810 [ 155.322228][ T4954] sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 [ 155.327806][ T4954] sctp_sendmsg+0x32b4/0x4a70 [ 155.332738][ T4954] inet_sendmsg+0x105/0x190 [ 155.337393][ T4954] __sys_sendto+0x76c/0xa10 [ 155.342210][ T4954] __x64_sys_sendto+0x125/0x1c0 [ 155.347207][ T4954] do_syscall_64+0x41/0xc0 [ 155.351886][ T4954] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 155.357978][ T4954] [ 155.360533][ T4954] CPU: 1 PID: 4954 Comm: syz-executor355 Not tainted 6.4.0-syzkaller-g257152fe29be #0 [ 155.370410][ T4954] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 [ 155.381181][ T4954] ===================================================== [ 155.388292][ T4954] Disabling lock debugging due to kernel taint [ 155.394979][ T4954] Kernel panic - not syncing: kmsan.panic set ... [ 155.401501][ T4954] CPU: 1 PID: 4954 Comm: syz-executor355 Tainted: G B 6.4.0-syzkaller-g257152fe29be #0 [ 155.412645][ T4954] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 [ 155.423085][ T4954] Call Trace: [ 155.426475][ T4954] [ 155.429499][ T4954] dump_stack_lvl+0x1bf/0x240 [ 155.434305][ T4954] dump_stack+0x1e/0x20 [ 155.438709][ T4954] panic+0x4d5/0xc70 [ 155.442823][ T4954] ? add_taint+0x108/0x1a0 [ 155.447411][ T4954] kmsan_report+0x2d0/0x2d0 [ 155.452011][ T4954] ? kmsan_internal_chain_origin+0x110/0x120 [ 155.458127][ T4954] ? __msan_warning+0x96/0x110 [ 155.463131][ T4954] ? sctp_inq_pop+0x1597/0x1910 [ 155.468178][ T4954] ? sctp_assoc_bh_rcv+0x1a7/0xc50 [ 155.473451][ T4954] ? sctp_inq_push+0x23e/0x2b0 [ 155.478363][ T4954] ? sctp_backlog_rcv+0x394/0xd80 [ 155.483848][ T4954] ? __release_sock+0x207/0x570 [ 155.489119][ T4954] ? release_sock+0x6b/0x1e0 [ 155.493889][ T4954] ? sctp_wait_for_connect+0x486/0x810 [ 155.499466][ T4954] ? sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 [ 155.505253][ T4954] ? sctp_sendmsg+0x32b4/0x4a70 [ 155.510251][ T4954] ? inet_sendmsg+0x105/0x190 [ 155.515093][ T4954] ? __sys_sendto+0x76c/0xa10 [ 155.519902][ T4954] ? __x64_sys_sendto+0x125/0x1c0 [ 155.525089][ T4954] ? do_syscall_64+0x41/0xc0 [ 155.529793][ T4954] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 155.536076][ T4954] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 155.542355][ T4954] ? sctp_do_sm+0x9040/0x9380 [ 155.547176][ T4954] ? kmem_cache_free+0xf8c/0x1280 [ 155.552335][ T4954] ? sctp_chunk_put+0x233/0x2d0 [ 155.557461][ T4954] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 155.563857][ T4954] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 155.569874][ T4954] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 155.575808][ T4954] __msan_warning+0x96/0x110 [ 155.580517][ T4954] sctp_inq_pop+0x1597/0x1910 [ 155.585392][ T4954] sctp_assoc_bh_rcv+0x1a7/0xc50 [ 155.590563][ T4954] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 155.596736][ T4954] ? sctp_assoc_lookup_asconf_ack+0x250/0x250 [ 155.603097][ T4954] ? sctp_assoc_lookup_asconf_ack+0x250/0x250 [ 155.609339][ T4954] sctp_inq_push+0x23e/0x2b0 [ 155.614051][ T4954] sctp_backlog_rcv+0x394/0xd80 [ 155.619110][ T4954] ? sctp_add_backlog+0x7c0/0x7c0 [ 155.624275][ T4954] __release_sock+0x207/0x570 [ 155.629228][ T4954] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 155.635171][ T4954] release_sock+0x6b/0x1e0 [ 155.639714][ T4954] sctp_wait_for_connect+0x486/0x810 [ 155.645141][ T4954] ? wake_bit_function+0x370/0x370 [ 155.650439][ T4954] sctp_sendmsg_to_asoc+0x1ea7/0x1ee0 [ 155.656001][ T4954] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 155.662041][ T4954] sctp_sendmsg+0x32b4/0x4a70 [ 155.666887][ T4954] ? sctp_getsockopt+0x1290/0x1290 [ 155.672163][ T4954] inet_sendmsg+0x105/0x190 [ 155.676853][ T4954] ? inet_send_prepare+0x5c0/0x5c0 [ 155.682129][ T4954] __sys_sendto+0x76c/0xa10 [ 155.686762][ T4954] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 155.693056][ T4954] __x64_sys_sendto+0x125/0x1c0 [ 155.698103][ T4954] do_syscall_64+0x41/0xc0 [ 155.702691][ T4954] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 155.708818][ T4954] RIP: 0033:0x7f4f0daa1fc9 [ 155.713344][ T4954] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 [ 155.733091][ T4954] RSP: 002b:00007ffe66f9bde8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 155.741631][ T4954] RAX: ffffffffffffffda RBX: 0100000000000000 RCX: 00007f4f0daa1fc9 [ 155.749788][ T4954] RDX: 0000000000034000 RSI: 0000000020847fff RDI: 0000000000000006 [ 155.757840][ T4954] RBP: 0000000000000000 R08: 000000002005ffe4 R09: 000000000000001c [ 155.765894][ T4954] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4f0da65850 [ 155.774240][ T4954] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 155.782377][ T4954] [ 155.786759][ T4954] Kernel Offset: disabled [ 155.791437][ T4954] Rebooting in 86400 seconds..