[....] Starting enhanced syslogd: rsyslogd[ 13.470223] audit: type=1400 audit(1516028617.461:5): avc: denied { syslog } for pid=3510 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.976932] audit: type=1400 audit(1516028623.968:6): avc: denied { map } for pid=3649 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. executing program [ 26.202643] audit: type=1400 audit(1516028630.194:7): avc: denied { map } for pid=3663 comm="syzkaller694156" path="/root/syzkaller694156493" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 26.212530] device syz0 entered promiscuous mode [ 26.237809] ------------[ cut here ]------------ [ 26.242656] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLAB object 'skbuff_head_cache' (offset 64, size 16)! [ 26.256110] WARNING: CPU: 0 PID: 3663 at mm/usercopy.c:81 usercopy_warn+0xdb/0x100 [ 26.263817] Kernel panic - not syncing: panic_on_warn set ... [ 26.263817] [ 26.271176] CPU: 0 PID: 3663 Comm: syzkaller694156 Not tainted 4.15.0-rc7-next-20180115+ #97 [ 26.279740] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.289086] Call Trace: [ 26.291670] dump_stack+0x194/0x257 [ 26.295307] ? arch_local_irq_restore+0x53/0x53 [ 26.299985] ? vsnprintf+0x1ed/0x1900 [ 26.303789] panic+0x1e4/0x41c [ 26.306975] ? refcount_error_report+0x214/0x214 [ 26.311723] ? show_regs_print_info+0x18/0x18 [ 26.316224] ? __warn+0x1c1/0x200 [ 26.319681] ? usercopy_warn+0xdb/0x100 [ 26.323641] __warn+0x1dc/0x200 [ 26.326897] ? console_unlock+0x978/0xd70 [ 26.331027] ? usercopy_warn+0xdb/0x100 [ 26.334982] report_bug+0x211/0x2d0 [ 26.338594] fixup_bug.part.11+0x37/0x80 [ 26.342628] do_error_trap+0x2d7/0x3e0 [ 26.346493] ? __down_trylock_console_sem+0x10d/0x1e0 [ 26.351671] ? math_error+0x400/0x400 [ 26.355444] ? vprintk_emit+0x3ea/0x590 [ 26.359392] ? check_noncircular+0x20/0x20 [ 26.363607] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.368433] do_invalid_op+0x1b/0x20 [ 26.372118] invalid_op+0x22/0x40 [ 26.375542] RIP: 0010:usercopy_warn+0xdb/0x100 [ 26.380092] RSP: 0018:ffff8801d99df548 EFLAGS: 00010282 [ 26.385426] RAX: dffffc0000000008 RBX: ffffffff865cf19f RCX: ffffffff815aba6e [ 26.392666] RDX: 0000000000000000 RSI: 1ffff1003b33be2e RDI: 1ffff1003b33be64 [ 26.399906] RBP: ffff8801d99df5a0 R08: 0000000000000000 R09: 0000000000000000 [ 26.407146] R10: 00000000000003e6 R11: 0000000000000000 R12: ffffffff86200d00 [ 26.414387] R13: ffffffff85d2cfc0 R14: 0000000000000040 R15: 0000000000000010 [ 26.421641] ? vprintk_func+0x5e/0xc0 [ 26.425420] ? usercopy_warn+0xdb/0x100 [ 26.429375] __check_heap_object+0x89/0xc0 [ 26.433589] __check_object_size+0x272/0x530 [ 26.437974] ? usercopy_abort+0xd0/0xd0 [ 26.441919] ? __might_sleep+0x95/0x190 [ 26.445874] ? kasan_check_read+0x11/0x20 [ 26.449997] ? _copy_to_user+0xa2/0xc0 [ 26.453866] put_cmsg+0x233/0x3f0 [ 26.457297] ? __scm_send+0x11a0/0x11a0 [ 26.461254] ? sock_dequeue_err_skb+0x2b1/0x420 [ 26.465901] ? kasan_check_write+0x14/0x20 [ 26.470112] sock_recv_errqueue+0x200/0x3e0 [ 26.474402] ? rw_copy_check_uvector+0x1be/0x280 [ 26.479136] packet_recvmsg+0xb2e/0x17a0 [ 26.483180] ? packet_getname_spkt+0x2b0/0x2b0 [ 26.487739] ? copy_msghdr_from_user+0x3a6/0x590 [ 26.492482] ? selinux_socket_recvmsg+0x36/0x40 [ 26.497124] ? security_socket_recvmsg+0x91/0xc0 [ 26.501855] ? packet_getname_spkt+0x2b0/0x2b0 [ 26.506405] sock_recvmsg+0xc9/0x110 [ 26.510089] ? __sock_recv_wifi_status+0x210/0x210 [ 26.514990] ___sys_recvmsg+0x2a4/0x640 [ 26.518943] ? ___sys_sendmsg+0x8b0/0x8b0 [ 26.523078] ? lock_downgrade+0x980/0x980 [ 26.527212] ? fget_raw+0x20/0x20 [ 26.530643] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.535196] ? vmacache_find+0x5f/0x280 [ 26.539154] ? poll_select_set_timeout+0x12f/0x210 [ 26.544057] ? do_restart_poll+0x2a0/0x2a0 [ 26.548265] ? __fdget+0x18/0x20 [ 26.551608] __sys_recvmmsg+0x2a9/0xaf0 [ 26.555560] ? __sys_recvmmsg+0x2a9/0xaf0 [ 26.559689] ? SyS_recvmsg+0x50/0x50 [ 26.563378] ? find_held_lock+0x35/0x1d0 [ 26.567417] ? retint_kernel+0x10/0x10 [ 26.571281] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.576031] ? retint_kernel+0x10/0x10 [ 26.579913] ? _copy_from_user+0x99/0x110 [ 26.584040] SyS_recvmmsg+0xc4/0x160 [ 26.587729] ? __sys_recvmmsg+0xaf0/0xaf0 [ 26.591848] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.596836] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.601570] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 26.606298] RIP: 0033:0x444339 [ 26.609470] RSP: 002b:00007ffdb359d7d8 EFLAGS: 00000203 ORIG_RAX: 000000000000012b [ 26.617325] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444339 [ 26.624567] RDX: 0000000000000001 RSI: 0000000020ef7fc4 RDI: 0000000000000005 [ 26.631807] RBP: 00000000006ce018 R08: 0000000020000000 R09: 0000000000000001 [ 26.639050] R10: 0000000000002000 R11: 0000000000000203 R12: 0000000000402020 [ 26.646291] R13: 00000000004020b0 R14: 0000000000000000 R15: 0000000000000000 [ 26.654084] Dumping ftrace buffer: [ 26.657655] (ftrace buffer empty) [ 26.661339] Kernel Offset: disabled [ 26.664940] Rebooting in 86400 seconds..