[....] Starting enhanced syslogd: rsyslogd[ 10.522711] audit: type=1400 audit(1514668280.445:4): avc: denied { syslog } for pid=3180 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 Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.699549] sg_write: data in/out 92/56 bytes for SCSI command 0x42-- guessing data in; [ 25.699549] program syzkaller928577 not setting count and/or reply_len properly [ 25.701806] kasan: CONFIG_KASAN_INLINE enabled [ 25.702445] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.703410] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 25.704229] Dumping ftrace buffer: [ 25.704701] (ftrace buffer empty) [ 25.705193] Modules linked in: [ 25.705661] CPU: 0 PID: 3336 Comm: syzkaller928577 Not tainted 4.9.73-gf3f3457 #11 [ 25.706705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.707920] task: ffff8801c977c800 task.stack: ffff8801c8728000 [ 25.708722] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 25.709825] RSP: 0018:ffff8801c872fa50 EFLAGS: 00010a07 [ 25.710541] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 25.711493] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 25.712442] RBP: ffff8801c872fa60 R08: 0000000000000001 R09: 0000000000000000 [ 25.713394] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 25.714344] R13: 0000000000000020 R14: ffff8801c8608000 R15: dffffc0000000000 [ 25.715293] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009d1d840 [ 25.716401] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.717185] CR2: 000000002024a000 CR3: 00000001c976e000 CR4: 00000000001406f0 [ 25.718189] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.719159] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.720108] Stack: [ 25.722220] ffff8801c977c800 ffff8801c8608158 ffff8801c872fac0 ffffffff82664fc1 [ 25.730163] ffff8801c8608170 ffffed00390c102b ffffed00390c102e ffff8801c8608168 [ 25.738099] dead4ead00000000 ffff8801c8608140 0000000000000000 0000000000000000 [ 25.746035] Call Trace: [ 25.748586] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 25.755040] [] sg_finish_rem_req+0x2b5/0x340 [ 25.761059] [] sg_new_read.isra.20+0x39/0x3e0 [ 25.767164] [] ? sg_get_rq_mark+0x142/0x190 [ 25.773099] [] sg_read+0x8bd/0x1440 [ 25.778338] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.784969] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 25.792031] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.798661] [] __vfs_read+0x103/0x670 [ 25.804073] [] ? default_llseek+0x290/0x290 [ 25.810021] [] ? fsnotify+0x86/0xf30 [ 25.815349] [] ? fsnotify+0xf30/0xf30 [ 25.820762] [] ? avc_policy_seqno+0x9/0x20 [ 25.826617] [] ? selinux_file_permission+0x82/0x460 [ 25.833246] [] ? security_file_permission+0x89/0x1e0 [ 25.839963] [] ? rw_verify_area+0xe5/0x2b0 [ 25.845809] [] vfs_read+0x11e/0x380 [ 25.851049] [] SyS_read+0xd9/0x1b0 [ 25.856201] [] ? vfs_copy_file_range+0x740/0x740 [ 25.862569] [] ? do_fast_syscall_32+0xcf/0x890 [ 25.868762] [] ? vfs_copy_file_range+0x740/0x740 [ 25.875130] [] do_fast_syscall_32+0x2f7/0x890 [ 25.881237] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.887866] [] entry_SYSENTER_compat+0x51/0x60 [ 25.894056] 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 [ 25.920281] RIP [] __free_pages+0x21/0x80 [ 25.926158] RSP [ 25.930078] ---[ end trace f70966c7f9c75d1e ]--- [ 25.934804] Kernel panic - not syncing: Fatal exception [ 25.940167] Dumping ftrace buffer: [ 25.943674] (ftrace buffer empty) [ 25.947348] Kernel Offset: disabled [ 25.950944] Rebooting in 86400 seconds..