[ 11.947526] audit: type=1400 audit(1520140628.238:4): avc: denied { syslog } for pid=3627 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.918528] kasan: CONFIG_KASAN_INLINE enabled [ 23.919305] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.920420] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 23.921595] Dumping ftrace buffer: [ 23.922092] (ftrace buffer empty) [ 23.922611] Modules linked in: [ 23.923109] CPU: 0 PID: 3798 Comm: syzkaller601708 Not tainted 4.9.85-ge0b05e6 #49 [ 23.924137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.925423] task: ffff8801d95f9800 task.stack: ffff8801d9960000 [ 23.926277] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 23.927427] RSP: 0018:ffff8801d9967940 EFLAGS: 00010a07 [ 23.928165] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82668efb [ 23.929137] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 23.930154] RBP: ffff8801d9967950 R08: 0000000048000000 R09: 0000000000001e30 [ 23.931148] R10: 0000000000002100 R11: ffff8801d95f9800 R12: 0000000000000004 [ 23.932139] R13: 0000000000000020 R14: ffff8801d7478000 R15: dffffc0000000000 [ 23.933140] FS: 00000000025bd880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.934253] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.935047] CR2: 0000000020a2afe3 CR3: 00000001da3bc000 CR4: 0000000000160670 [ 23.936042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.937012] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.937983] Stack: [ 23.938300] 0000000000000001 ffff8801d7478158 ffff8801d99679b0 ffffffff82668f21 [ 23.944189] ffff8801d7478170 ffffed003ae8f02b ffffed003ae8f02e ffff8801d7478168 [ 23.952163] dead4ead00000000 ffff8801d7478140 0000000000000000 0000000000000000 [ 23.960142] Call Trace: [ 23.962706] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 23.969167] [] sg_finish_rem_req+0x2b5/0x340 [ 23.975192] [] sg_new_read.isra.20+0x18d/0x3e0 [ 23.981391] [] sg_read+0x8b7/0x1440 [ 23.986635] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 23.993274] [] ? fsnotify+0x86/0xf30 [ 23.998614] [] ? fsnotify+0xf30/0xf30 [ 24.004034] [] ? avc_policy_seqno+0x9/0x20 [ 24.009890] [] do_loop_readv_writev.part.17+0xc8/0x2b0 [ 24.016786] [] do_readv_writev+0x5fd/0x740 [ 24.022655] [] ? vfs_write+0x530/0x530 [ 24.028162] [] ? sg_ioctl+0x2a00/0x2a00 [ 24.033755] [] ? do_iter_readv_writev+0x4b0/0x4b0 [ 24.040218] [] ? __might_sleep+0x95/0x1a0 [ 24.045983] [] ? __inode_security_revalidate+0xd9/0x130 [ 24.052966] [] ? __fsnotify_parent+0xbc/0x340 [ 24.059077] [] ? avc_policy_seqno+0x9/0x20 [ 24.064930] [] ? fsnotify+0x86/0xf30 [ 24.070260] [] ? fsnotify+0xf30/0xf30 [ 24.075681] [] vfs_readv+0x84/0xc0 [ 24.080839] [] do_readv+0xe6/0x250 [ 24.085998] [] ? vfs_readv+0xc0/0xc0 [ 24.091329] [] ? SyS_read+0x1b0/0x1b0 [ 24.096747] [] SyS_readv+0x27/0x30 [ 24.101908] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 24.108456] [] do_syscall_64+0x1a4/0x490 [ 24.114137] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 24.121031] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [ 24.148102] RIP [] __free_pages+0x21/0x80 [ 24.153995] RSP [ 24.158029] ---[ end trace aca6a84c97d870fb ]--- [ 24.162794] Kernel panic - not syncing: Fatal exception [ 24.168551] Dumping ftrace buffer: [ 24.172067] (ftrace buffer empty) [ 24.175747] Kernel Offset: disabled [ 24.179342] Rebooting in 86400 seconds..