[ 31.991401][ T26] audit: type=1800 audit(1572567875.221:22): pid=7221 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?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: [ 45.615942][ T7386] IPVS: ftp: loaded support on port[0] = 21 [ 46.015826][ T7375] can: request_module (can-proto-0) failed. [ 47.209114][ T7375] can: request_module (can-proto-0) failed. Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. 2019/11/01 00:24:56 parsed 1 programs 2019/11/01 00:24:57 executed programs: 0 [ 54.525666][ T7463] IPVS: ftp: loaded support on port[0] = 21 [ 54.541323][ T7467] IPVS: ftp: loaded support on port[0] = 21 [ 54.542508][ T7465] IPVS: ftp: loaded support on port[0] = 21 [ 54.549665][ T7469] IPVS: ftp: loaded support on port[0] = 21 [ 54.572230][ T7461] IPVS: ftp: loaded support on port[0] = 21 [ 54.572716][ T7470] IPVS: ftp: loaded support on port[0] = 21 [ 54.726117][ T7463] chnl_net:caif_netlink_parms(): no params data found [ 54.734504][ T1078] ------------[ cut here ]------------ [ 54.739969][ T1078] WARNING: CPU: 1 PID: 1078 at mm/khugepaged.c:1643 collapse_file+0x1ea8/0x3150 [ 54.747908][ T7463] kobject: 'caif0' (0000000015a5e1ac): kobject_add_internal: parent: 'net', set: 'devices' [ 54.748960][ T1078] Kernel panic - not syncing: panic_on_warn set ... [ 54.761064][ T7463] kobject: 'caif0' (0000000015a5e1ac): kobject_uevent_env [ 54.765488][ T1078] CPU: 1 PID: 1078 Comm: khugepaged Not tainted 5.4.0-rc4+ #0 [ 54.773069][ T7463] kobject: 'caif0' (0000000015a5e1ac): fill_kobj_path: path = '/devices/virtual/net/caif0' [ 54.780091][ T1078] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.780095][ T1078] Call Trace: [ 54.780107][ T1078] dump_stack+0x113/0x167 [ 54.780116][ T1078] ? collapse_file+0x1ea8/0x3150 [ 54.780122][ T1078] panic+0x22a/0x4e3 [ 54.780126][ T1078] ? add_taint.cold.8+0x11/0x11 [ 54.780139][ T1078] __warn.cold.11+0x25/0x30 [ 54.780144][ T1078] ? collapse_file+0x1ea8/0x3150 [ 54.780150][ T1078] report_bug+0x1b0/0x270 [ 54.780158][ T1078] do_error_trap+0x11b/0x200 [ 54.780171][ T1078] do_invalid_op+0x36/0x40 [ 54.790605][ T7463] kobject: 'queues' (0000000031d80141): kobject_add_internal: parent: 'caif0', set: '' [ 54.800163][ T1078] ? collapse_file+0x1ea8/0x3150 [ 54.800175][ T1078] invalid_op+0x23/0x30 [ 54.800180][ T1078] RIP: 0010:collapse_file+0x1ea8/0x3150 [ 54.800186][ T1078] Code: ff e8 7c f5 61 ff e9 fc f4 ff ff 48 8b b5 50 fe ff ff 31 c9 ba 01 00 00 00 48 8b bd 80 fe ff ff e8 4d d3 ef ff e9 cc f2 ff ff <0f> 0b 48 8b bb 20 ff ff ff c7 85 40 fe ff ff 00 00 00 00 e9 39 eb [ 54.800189][ T1078] RSP: 0018:ffff8880a7e67aa8 EFLAGS: 00010202 [ 54.800194][ T1078] RAX: 01fffc000000201f RBX: ffff8880a7e67c78 RCX: ffffffff819e5670 [ 54.800197][ T1078] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea00023f2100 [ 54.800200][ T1078] RBP: ffff8880a7e67ca0 R08: fffff9400047e421 R09: fffff9400047e421 [ 54.800203][ T1078] R10: fffff9400047e420 R11: ffffea00023f2107 R12: ffffea00023f2100 [ 54.800205][ T1078] R13: ffffea00023f2100 R14: dffffc0000000000 R15: ffffea0002078000 [ 54.800214][ T1078] ? collapse_file+0x10f0/0x3150 [ 54.800221][ T1078] ? collapse_file+0x10f0/0x3150 [ 54.800229][ T1078] ? find_held_lock+0x36/0x1d0 [ 54.805125][ T7463] kobject: 'queues' (0000000031d80141): kobject_uevent_env [ 54.807804][ T1078] ? collapse_huge_page+0x3350/0x3350 [ 54.807811][ T1078] ? find_held_lock+0x36/0x1d0 [ 54.807821][ T1078] ? khugepaged+0x10ea/0x3440 [ 54.807826][ T1078] ? lock_downgrade+0x900/0x900 [ 54.807838][ T1078] ? __kasan_check_read+0x11/0x20 [ 54.807845][ T1078] khugepaged+0x2134/0x3440 [ 54.807851][ T1078] ? __kasan_check_read+0x11/0x20 [ 54.807855][ T1078] ? __lock_acquire+0x100f/0x4ef0 [ 54.807862][ T1078] ? _raw_spin_unlock_irq+0x27/0x80 [ 54.813427][ T7463] kobject: 'queues' (0000000031d80141): kobject_uevent_env: filter function caused the event to drop! [ 54.816656][ T1078] ? collapse_pte_mapped_thp+0x910/0x910 [ 54.822397][ T7463] kobject: 'rx-0' (0000000001dfed79): kobject_add_internal: parent: 'queues', set: 'queues' [ 54.825961][ T1078] ? __kasan_check_write+0x14/0x20 [ 54.831283][ T7463] kobject: 'rx-0' (0000000001dfed79): kobject_uevent_env [ 54.835189][ T1078] ? do_raw_spin_lock+0x123/0x2d0 [ 54.840079][ T7463] kobject: 'rx-0' (0000000001dfed79): fill_kobj_path: path = '/devices/virtual/net/caif0/queues/rx-0' [ 54.844150][ T1078] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 54.854774][ T7463] kobject: 'tx-0' (00000000693d5c0a): kobject_add_internal: parent: 'queues', set: 'queues' [ 54.859268][ T1078] ? finish_wait+0x290/0x290 [ 54.859275][ T1078] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 54.859281][ T1078] ? trace_hardirqs_on+0x28/0x1a0 [ 54.859286][ T1078] ? __kasan_check_read+0x11/0x20 [ 54.859293][ T1078] ? __kasan_check_read+0x11/0x20 [ 54.859300][ T1078] ? __kthread_parkme+0xc8/0x1a0 [ 54.859304][ T1078] ? __kasan_check_read+0x11/0x20 [ 54.859311][ T1078] kthread+0x331/0x3f0 [ 54.859316][ T1078] ? collapse_pte_mapped_thp+0x910/0x910 [ 54.859320][ T1078] ? kthread_mod_delayed_work+0x190/0x190 [ 54.859326][ T1078] ret_from_fork+0x24/0x30 [ 54.864620][ T1078] Kernel Offset: disabled [ 55.132761][ T1078] Rebooting in 86400 seconds..