[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. syzkaller login: [ 38.807672] audit: type=1400 audit(1602424946.377:8): avc: denied { execmem } for pid=6491 comm="syz-executor090" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.820439] IPVS: ftp: loaded support on port[0] = 21 [ 38.895529] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.905368] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.923077] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.931666] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.937809] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready executing program [ 38.948753] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.957593] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.966722] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 38.976735] ================================================================================ [ 38.985384] UBSAN: Undefined behaviour in net/mac80211/cfg.c:491:9 [ 38.991701] index 255 is out of range for type 'ieee80211_key *[6]' [ 38.998093] CPU: 1 PID: 6492 Comm: syz-executor090 Not tainted 4.19.150-syzkaller #0 [ 39.005959] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.015290] Call Trace: [ 39.017855] dump_stack+0x22c/0x33e [ 39.021463] ubsan_epilogue+0xe/0x3a [ 39.025154] __ubsan_handle_out_of_bounds.cold+0x63/0x6f [ 39.030585] ieee80211_del_key+0x48a/0x490 [ 39.034822] nl80211_del_key+0x41e/0xc50 [ 39.038863] ? nl80211_parse_key+0x1120/0x1120 [ 39.043426] ? validate_nla+0x2c6/0x970 [ 39.047382] ? nl80211_pre_doit+0xa2/0x660 [ 39.051595] ? nl80211_vendor_cmd_dump+0x15e0/0x15e0 [ 39.056685] genl_family_rcv_msg+0x6bf/0xd50 [ 39.061075] ? genl_family_attrbuf+0x120/0x120 [ 39.065662] ? genl_rcv_msg+0x15d/0x1b0 [ 39.069616] ? ww_mutex_unlock+0x2f0/0x2f0 [ 39.073866] ? __lock_acquire+0x6ec/0x3ff0 [ 39.078080] ? __radix_tree_lookup+0x251/0x3f0 [ 39.082643] genl_rcv_msg+0xdf/0x1b0 [ 39.086359] netlink_rcv_skb+0x160/0x440 [ 39.090400] ? genl_family_rcv_msg+0xd50/0xd50 [ 39.094965] ? netlink_ack+0xae0/0xae0 [ 39.098831] ? genl_rcv+0x15/0x40 [ 39.102263] genl_rcv+0x24/0x40 [ 39.105536] netlink_unicast+0x4d5/0x690 [ 39.109581] ? netlink_sendskb+0x110/0x110 [ 39.113802] netlink_sendmsg+0x717/0xcc0 [ 39.117845] ? nlmsg_notify+0x1a0/0x1a0 [ 39.121806] ? __sock_recv_ts_and_drops+0x540/0x540 [ 39.126802] ? nlmsg_notify+0x1a0/0x1a0 [ 39.130757] sock_sendmsg+0xc7/0x130 [ 39.134449] ___sys_sendmsg+0x7bb/0x8f0 [ 39.138401] ? copy_msghdr_from_user+0x440/0x440 [ 39.143137] ? __lock_acquire+0x6ec/0x3ff0 [ 39.147393] ? sock_ioctl+0x30e/0x5f0 [ 39.151181] ? routing_ioctl+0x570/0x570 [ 39.155230] ? lock_downgrade+0x750/0x750 [ 39.159350] ? lock_acquire+0x170/0x3f0 [ 39.163318] ? debug_object_active_state+0x108/0x340 [ 39.168420] ? routing_ioctl+0x570/0x570 [ 39.172463] ? do_vfs_ioctl+0x110/0x12e0 [ 39.176517] ? selinux_file_ioctl+0x44f/0x5e0 [ 39.180988] ? ioctl_preallocate+0x200/0x200 [ 39.185375] ? __fget_light+0x1a2/0x230 [ 39.189352] __x64_sys_sendmsg+0x132/0x220 [ 39.193573] ? __sys_sendmsg+0x1b0/0x1b0 [ 39.197618] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.202960] ? trace_hardirqs_off_caller+0x6e/0x210 [ 39.207955] ? do_syscall_64+0x21/0x670 [ 39.211926] do_syscall_64+0xf9/0x670 [ 39.215707] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.220872] RIP: 0033:0x4416f9 [ 39.224045] Code: e8 dc 05 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 7b 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 39.242924] RSP: 002b:00007fff1ac64f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e