[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 76.386082] audit: type=1800 audit(1553218376.439:25): pid=10010 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 76.405764] audit: type=1800 audit(1553218376.449:26): pid=10010 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 76.425642] audit: type=1800 audit(1553218376.459:27): pid=10010 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 137.628754] ------------[ cut here ]------------ [ 137.633589] kernel BUG at mm/kmsan/kmsan_hooks.c:259! [ 137.639050] invalid opcode: 0000 [#1] SMP [ 137.643322] CPU: 1 PID: 1259 Comm: kswapd0 Not tainted 5.0.0+ #16 [ 137.649615] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.659505] RIP: 0010:kmsan_free_page+0x13e/0x2f0 [ 137.664402] Code: 66 90 66 2e 0f 1f 84 00 00 00 00 00 44 39 e8 0f 8d 45 01 00 00 48 63 c8 48 8d 0c 89 48 c1 e1 04 ff c0 48 83 7c 0b 40 00 74 e2 <0f> 0b 41 83 fe 1f 0f 84 24 01 00 00 49 63 c5 48 83 c3 40 31 c9 0f [ 137.683600] RSP: 0018:ffff888124e9f498 EFLAGS: 00010286 [ 137.689005] RAX: 0000000000000002 RBX: ffffea0002fbe800 RCX: 0000000000000050 [ 137.696295] RDX: ffffffff8c626000 RSI: 0000000000000004 RDI: ffffea0002fbe800 [ 137.703808] RBP: ffff888124e9f4e0 R08: 0000000000000000 R09: ffff88812fd39010 [ 137.711103] R10: 0000000000000000 R11: ffffffff881e5ac0 R12: 0000000000000004 [ 137.718596] R13: 0000000000000010 R14: 0000000000000004 R15: ffffea0002fbe800 [ 137.726101] FS: 0000000000000000(0000) GS:ffff88812fd00000(0000) knlGS:0000000000000000 [ 137.734444] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.740360] CR2: 00000000006cb090 CR3: 00000000b27ee000 CR4: 00000000001406e0 [ 137.747997] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 137.755655] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 137.762945] Call Trace: [ 137.765562] __free_pages_ok+0x250/0x1990 [ 137.769846] __free_pages+0x10e/0x260 [ 137.773763] ion_page_pool_shrink+0x800/0xb60 executing program [ 137.778294] ion_system_heap_shrink+0x1a2/0x460 [ 137.783423] ? ion_system_heap_free+0x4d0/0x4d0 [ 137.788297] ion_heap_shrink_scan+0x248/0x350 [ 137.792826] ? ion_heap_shrink_count+0x220/0x220 [ 137.797620] do_shrink_slab+0xb63/0x1240 [ 137.801852] shrink_slab+0x307/0xe30 [ 137.805905] shrink_node+0x76c/0x2130 [ 137.810308] kswapd+0x248c/0x3e20 [ 137.813957] kthread+0x4a1/0x4e0 [ 137.817488] ? kswapd_run+0x380/0x380 [ 137.821395] ? schedule_tail+0x1b2/0x410 [ 137.825570] ? kthread_blkcg+0xf0/0xf0 [ 137.829600] ret_from_fork+0x35/0x40 [ 137.833432] Modules linked in: [ 137.836903] ---[ end trace 13c23f32ef750ede ]--- [ 137.841696] RIP: 0010:kmsan_free_page+0x13e/0x2f0 [ 137.846656] Code: 66 90 66 2e 0f 1f 84 00 00 00 00 00 44 39 e8 0f 8d 45 01 00 00 48 63 c8 48 8d 0c 89 48 c1 e1 04 ff c0 48 83 7c 0b 40 00 74 e2 <0f> 0b 41 83 fe 1f 0f 84 24 01 00 00 49 63 c5 48 83 c3 40 31 c9 0f [ 137.866170] RSP: 0018:ffff888124e9f498 EFLAGS: 00010286 [ 137.871641] RAX: 0000000000000002 RBX: ffffea0002fbe800 RCX: 0000000000000050 [ 137.879157] RDX: ffffffff8c626000 RSI: 0000000000000004 RDI: ffffea0002fbe800 [ 137.886511] RBP: ffff888124e9f4e0 R08: 0000000000000000 R09: ffff88812fd39010 [ 137.894454] R10: 0000000000000000 R11: ffffffff881e5ac0 R12: 0000000000000004 [ 137.901748] R13: 0000000000000010 R14: 0000000000000004 R15: ffffea0002fbe800 [ 137.909352] FS: 0000000000000000(0000) GS:ffff88812fd00000(0000) knlGS:0000000000000000 [ 137.917864] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.923928] CR2: 00000000006cb090 CR3: 00000000b27ee000 CR4: 00000000001406e0 [ 137.931316] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 137.938657] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 137.946071] Kernel panic - not syncing: Fatal exception [ 137.952963] Kernel Offset: disabled [ 137.956746] Rebooting in 86400 seconds..