[....] Starting enhanced syslogd: rsyslogd[ 10.302540] audit: type=1400 audit(1513613034.571:5): avc: denied { syslog } for pid=2995 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: [ 16.493438] audit: type=1400 audit(1513613040.762:6): avc: denied { map } for pid=3135 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 'ci-upstream-net-kasan-gce-9,10.128.15.205' (ECDSA) to the list of known hosts. executing program [ 37.255396] audit: type=1400 audit(1513613061.524:7): avc: denied { map } for pid=3153 comm="syzkaller217927" path="/root/syzkaller217927111" 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 [ 37.283431] kasan: CONFIG_KASAN_INLINE enabled [ 37.288028] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.295404] general protection fault: 0000 [#1] SMP KASAN [ 37.300911] Dumping ftrace buffer: [ 37.304420] (ftrace buffer empty) [ 37.308097] Modules linked in: [ 37.311259] CPU: 0 PID: 3153 Comm: syzkaller217927 Not tainted 4.15.0-rc3+ #156 [ 37.318668] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.327993] RIP: 0010:page_mapping+0xa4/0x530 [ 37.332452] RSP: 0018:ffff8801c947f320 EFLAGS: 00010202 [ 37.337780] RAX: 0000000000000004 RBX: 1ffff1003928fe65 RCX: ffffffff8194a00d [ 37.345017] RDX: 0000000000000000 RSI: 1ffff1003928ff03 RDI: 0000000000000000 [ 37.352252] RBP: ffff8801c947f470 R08: ffffed003a5ecd6a R09: ffff8801d2f66b30 [ 37.359488] R10: ffff8801ca51f0c8 R11: ffffed003a5ecd69 R12: 0000000000000000 [ 37.366724] R13: ffff8801c947f448 R14: dffffc0000000000 R15: 0000000000000020 [ 37.373961] FS: 0000000000d4f880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 37.382154] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.388001] CR2: 0000000020fc8000 CR3: 00000001c9abb003 CR4: 00000000001606f0 [ 37.395244] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.402486] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.409724] Call Trace: [ 37.412281] ? kstrndup+0xd0/0xd0 [ 37.415703] ? find_held_lock+0x35/0x1d0 [ 37.419736] ? __rds_conn_create+0xf8b/0x17d0 [ 37.424201] ? lock_downgrade+0x980/0x980 [ 37.428315] ? trace_hardirqs_off+0xd/0x10 [ 37.432517] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 37.437586] set_page_dirty+0xb9/0x5d0 [ 37.441440] ? __writepage+0xc0/0xc0 [ 37.445118] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.450097] ? trace_hardirqs_on+0xd/0x10 [ 37.454209] ? __rds_conn_create+0x376/0x17d0 [ 37.458676] ? rds_conn_message_info_send+0x30/0x30 [ 37.463659] rds_atomic_free_op+0xc2/0x330 [ 37.467861] ? rds_rdma_free_op+0x500/0x500 [ 37.472149] ? refcount_sub_and_test+0x115/0x1b0 [ 37.476868] ? refcount_inc+0x50/0x50 [ 37.480640] rds_message_put+0x53c/0x6b0 [ 37.484667] ? kfree+0x1e7/0x250 [ 37.487998] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 37.493939] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 37.498136] ? trace_hardirqs_on+0xd/0x10 [ 37.502249] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.506623] ? __release_sock+0x360/0x360 [ 37.510732] ? lock_sock_nested+0x91/0x110 [ 37.514942] ? rds_conn_create_outgoing+0x3f/0x50 [ 37.519755] rds_sendmsg+0x14ee/0x1f90 [ 37.523616] ? rds_send_drop_to+0x19d0/0x19d0 [ 37.528083] ? find_held_lock+0x35/0x1d0 [ 37.532113] ? sock_has_perm+0x29c/0x400 [ 37.536234] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 37.541564] ? lock_downgrade+0x980/0x980 [ 37.545686] ? lock_release+0xa40/0xa40 [ 37.549634] ? selinux_socket_sendmsg+0x36/0x40 [ 37.554267] ? security_socket_sendmsg+0x89/0xb0 [ 37.558988] ? rds_send_drop_to+0x19d0/0x19d0 [ 37.563452] sock_sendmsg+0xca/0x110 [ 37.567132] ___sys_sendmsg+0x755/0x890 [ 37.571082] ? copy_msghdr_from_user+0x590/0x590 [ 37.575807] ? __do_page_fault+0x5f7/0xc90 [ 37.580005] ? lock_downgrade+0x980/0x980 [ 37.584124] ? fget_raw+0x20/0x20 [ 37.587542] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 37.592089] ? vmacache_find+0x5f/0x280 [ 37.596029] ? up_read+0x1a/0x40 [ 37.599360] ? __do_page_fault+0x3d6/0xc90 [ 37.603558] ? __local_bh_enable_ip+0x121/0x230 [ 37.608193] ? __fdget+0x18/0x20 [ 37.611527] __sys_sendmsg+0xe5/0x210 [ 37.615294] ? __sys_sendmsg+0xe5/0x210 [ 37.619240] ? SyS_shutdown+0x290/0x290 [ 37.623179] ? __do_page_fault+0xc90/0xc90 [ 37.627387] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.632375] SyS_sendmsg+0x2d/0x50 [ 37.635881] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 37.640600] RIP: 0033:0x43fea9 [ 37.643755] RSP: 002b:00007ffd68d57678 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 37.651426] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fea9 [ 37.658659] RDX: 0000000000000000 RSI: 0000000020002000 RDI: 0000000000000003 [ 37.665893] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 37.673129] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 37.680363] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 37.687605] Code: f2 f2 f2 c7 40 14 00 f2 f2 f2 c7 40 18 f2 f2 f2 f2 c7 40 1c 00 f2 f2 f2 c7 40 20 f3 f3 f3 f3 e8 13 36 db ff 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 3c 04 00 00 4d 8d b5 00 ff ff ff 48 ba 00 [ 37.706679] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c947f320 [ 37.712666] ---[ end trace 9738a32a7e726d58 ]--- [ 37.717423] Kernel panic - not syncing: Fatal exception [ 37.722820] Dumping ftrace buffer: [ 37.726328] (ftrace buffer empty) [ 37.730004] Kernel Offset: disabled [ 37.733598] Rebooting in 86400 seconds..