[ 35.364032][ T27] audit: type=1800 audit(1550051181.976:27): pid=7461 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 35.385740][ T27] audit: type=1800 audit(1550051181.976:28): pid=7461 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.322285][ T27] audit: type=1800 audit(1550051182.976:29): pid=7461 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 36.342438][ T27] audit: type=1800 audit(1550051182.976:30): pid=7461 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.474914][ T7614] page:ffffea0001f95d00 count:0 mapcount:0 mapping:0000000000000000 index:0x0 [ 46.484094][ T7614] flags: 0x1fffc0000000000() [ 46.488933][ T7614] raw: 01fffc0000000000 ffffea00008c6cc8 ffffea0000bc8a88 0000000000000000 [ 46.498014][ T7614] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 46.506582][ T7614] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) [ 46.514662][ T7614] ------------[ cut here ]------------ [ 46.520129][ T7614] kernel BUG at include/linux/mm.h:579! [ 46.525861][ T7614] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 46.531922][ T7614] CPU: 0 PID: 7614 Comm: syz-executor529 Not tainted 5.0.0-rc6-next-20190213 #34 [ 46.541138][ T7614] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.551196][ T7614] RIP: 0010:generic_pipe_buf_release+0x120/0x160 [ 46.557516][ T7614] Code: bd ff 4c 89 e7 e8 c0 40 db ff e8 cb 27 bd ff 5b 41 5c 41 5d 5d c3 e8 bf 27 bd ff 48 c7 c6 a0 98 75 87 4c 89 e7 e8 50 d8 e4 ff <0f> 0b e8 a9 27 bd ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 58 f9 [ 46.577104][ T7614] RSP: 0018:ffff888037ac7920 EFLAGS: 00010293 [ 46.583166][ T7614] RAX: ffff88807a08e680 RBX: ffffea0001f95d34 RCX: 0000000000000000 [ 46.591273][ T7614] RDX: 0000000000000000 RSI: ffffffff81981ed7 RDI: ffffea0001f95d38 [ 46.599227][ T7614] RBP: ffff888037ac7938 R08: 000000000000003e R09: 0000000000000000 [ 46.607265][ T7614] R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0001f95d00 [ 46.615244][ T7614] R13: 0000000000000000 R14: ffff8880378ac780 R15: ffff888040b88900 [ 46.623210][ T7614] FS: 0000000001535880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.632126][ T7614] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.638688][ T7614] CR2: 000000000043e570 CR3: 000000001b397000 CR4: 00000000001406f0 [ 46.646955][ T7614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.655051][ T7614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.663132][ T7614] Call Trace: [ 46.666561][ T7614] iter_file_splice_write+0x7d1/0xbe0 [ 46.672080][ T7614] ? atime_needs_update+0x5f0/0x5f0 [ 46.677269][ T7614] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 46.683334][ T7614] ? rw_verify_area+0x118/0x360 [ 46.688350][ T7614] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 46.694316][ T7614] direct_splice_actor+0x126/0x1a0 [ 46.699516][ T7614] splice_direct_to_actor+0x369/0x970 [ 46.704873][ T7614] ? generic_pipe_buf_nosteal+0x10/0x10 [ 46.710513][ T7614] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.716740][ T7614] ? do_splice_to+0x190/0x190 [ 46.721486][ T7614] ? rw_verify_area+0x118/0x360 [ 46.726587][ T7614] do_splice_direct+0x1da/0x2a0 [ 46.731523][ T7614] ? splice_direct_to_actor+0x970/0x970 [ 46.737143][ T7614] ? rw_verify_area+0x118/0x360 [ 46.741982][ T7614] do_sendfile+0x597/0xd00 [ 46.746377][ T7614] ? do_compat_pwritev64+0x1c0/0x1c0 [ 46.751641][ T7614] ? __fget_light+0x1a9/0x230 [ 46.756309][ T7614] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.762809][ T7614] __x64_sys_sendfile64+0x1dd/0x220 [ 46.767997][ T7614] ? __ia32_sys_sendfile+0x230/0x230 [ 46.773379][ T7614] ? do_syscall_64+0x26/0x610 [ 46.778042][ T7614] ? lockdep_hardirqs_on+0x418/0x5d0 [ 46.783312][ T7614] ? trace_hardirqs_on+0x67/0x230 [ 46.788326][ T7614] do_syscall_64+0x103/0x610 [ 46.792909][ T7614] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.798805][ T7614] RIP: 0033:0x443d39 [ 46.802831][ T7614] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 46.822467][ T7614] RSP: 002b:00007ffc5fd699c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 46.830864][ T7614] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443d39 [ 46.838980][ T7614] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 [ 46.846938][ T7614] RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 [ 46.854895][ T7614] R10: 0000000102000000 R11: 0000000000000246 R12: 0000000000401a40 [ 46.862965][ T7614] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 46.871078][ T7614] Modules linked in: [ 46.875768][ T7614] ---[ end trace 081e1d0ef8d9c96a ]--- [ 46.881283][ T7614] RIP: 0010:generic_pipe_buf_release+0x120/0x160 [ 46.887777][ T7614] Code: bd ff 4c 89 e7 e8 c0 40 db ff e8 cb 27 bd ff 5b 41 5c 41 5d 5d c3 e8 bf 27 bd ff 48 c7 c6 a0 98 75 87 4c 89 e7 e8 50 d8 e4 ff <0f> 0b e8 a9 27 bd ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 58 f9 [ 46.907397][ T7614] RSP: 0018:ffff888037ac7920 EFLAGS: 00010293 [ 46.913582][ T7614] RAX: ffff88807a08e680 RBX: ffffea0001f95d34 RCX: 0000000000000000 [ 46.921571][ T7614] RDX: 0000000000000000 RSI: ffffffff81981ed7 RDI: ffffea0001f95d38 [ 46.929553][ T7614] RBP: ffff888037ac7938 R08: 000000000000003e R09: 0000000000000000 [ 46.937624][ T7614] R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0001f95d00 [ 46.945727][ T7614] R13: 0000000000000000 R14: ffff8880378ac780 R15: ffff888040b88900 [ 46.954963][ T7614] FS: 0000000001535880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.964614][ T7614] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.971239][ T7614] CR2: 000000000043e570 CR3: 000000001b397000 CR4: 00000000001406f0 [ 46.979333][ T7614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.987333][ T7614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.995294][ T7614] Kernel panic - not syncing: Fatal exception [ 47.002751][ T7614] Kernel Offset: disabled [ 47.007206][ T7614] Rebooting in 86400 seconds..