[....] Starting enhanced syslogd: rsyslogd[ 13.404182] audit: type=1400 audit(1514677873.881:4): 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[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.845765] kasan: CONFIG_KASAN_INLINE enabled [ 24.850631] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.858128] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.864333] Dumping ftrace buffer: [ 24.867842] (ftrace buffer empty) [ 24.871522] Modules linked in: [ 24.874806] CPU: 1 PID: 3335 Comm: syzkaller202204 Not tainted 4.9.73-gf3f3457 #11 [ 24.882478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.891798] task: ffff8801cb2c8000 task.stack: ffff8801c5c30000 [ 24.897821] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 24.906054] RSP: 0018:ffff8801c5c37a50 EFLAGS: 00010a07 [ 24.911470] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 24.918707] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 24.925944] RBP: ffff8801c5c37a60 R08: 0000000000000001 R09: 0000000000000000 [ 24.933182] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 24.940419] R13: 0000000000000020 R14: ffff8801d686a100 R15: dffffc0000000000 [ 24.947662] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008c08840 [ 24.955860] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.961716] CR2: 0000000020001000 CR3: 00000001c0f97000 CR4: 00000000001406e0 [ 24.968963] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.976202] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.983447] Stack: [ 24.985564] ffff8801cb2c8000 ffff8801d686a258 ffff8801c5c37ac0 ffffffff82664fc1 [ 24.993532] ffff8801d686a270 ffffed003ad0d44b ffffed003ad0d44e ffff8801d686a268 [ 25.001478] dead4ead00000000 ffff8801d686a240 0000000000000000 0000000000000000 [ 25.009429] Call Trace: [ 25.011986] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 25.018445] [] sg_finish_rem_req+0x2b5/0x340 [ 25.024471] [] sg_new_read.isra.20+0x39/0x3e0 [ 25.030582] [] ? sg_get_rq_mark+0x142/0x190 [ 25.036519] [] sg_read+0x8bd/0x1440 [ 25.041761] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.048398] [] ? lru_cache_add+0xd9/0x1e0 [ 25.054164] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 25.061231] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.067865] [] __vfs_read+0x103/0x670 [ 25.073285] [] ? default_llseek+0x290/0x290 [ 25.079225] [] ? fsnotify+0x86/0xf30 [ 25.084555] [] ? fsnotify+0xf30/0xf30 [ 25.089972] [] ? avc_policy_seqno+0x9/0x20 [ 25.095822] [] ? selinux_file_permission+0x82/0x460 [ 25.102454] [] ? security_file_permission+0x89/0x1e0 [ 25.109172] [] ? rw_verify_area+0xe5/0x2b0 [ 25.115023] [] vfs_read+0x11e/0x380 [ 25.120264] [] SyS_read+0xd9/0x1b0 [ 25.125419] [] ? vfs_copy_file_range+0x740/0x740 [ 25.131791] [] ? do_fast_syscall_32+0xcf/0x890 [ 25.137989] [] ? vfs_copy_file_range+0x740/0x740 [ 25.144361] [] do_fast_syscall_32+0x2f7/0x890 [ 25.150469] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.157101] [] entry_SYSENTER_compat+0x51/0x60 [ 25.163293] 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 [ 25.189591] RIP [] __free_pages+0x21/0x80 [ 25.195469] RSP [ 25.199254] ---[ end trace 49a6a2985f8be1c5 ]--- [ 25.204078] Kernel panic - not syncing: Fatal exception [ 25.209452] Dumping ftrace buffer: [ 25.212960] (ftrace buffer empty) [ 25.216637] Kernel Offset: disabled [ 25.220231] Rebooting in 86400 seconds..