[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 104.994676] audit: type=1800 audit(1553666570.040:25): pid=10894 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 105.013877] audit: type=1800 audit(1553666570.050:26): pid=10894 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 105.033398] audit: type=1800 audit(1553666570.060:27): pid=10894 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 '10.128.0.63' (ECDSA) to the list of known hosts. syzkaller login: [ 199.321497] IPVS: ftp: loaded support on port[0] = 21 executing program [ 199.407002] ================================================================== [ 199.414408] BUG: KMSAN: uninit-value in mpol_rebind_task+0x1b2/0x250 [ 199.420914] CPU: 0 PID: 11047 Comm: syz-executor334 Not tainted 5.0.0+ #17 [ 199.427912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 199.437255] Call Trace: [ 199.439840] dump_stack+0x173/0x1d0 [ 199.443471] kmsan_report+0x131/0x2a0 [ 199.447278] __msan_warning+0x7a/0xf0 [ 199.451098] mpol_rebind_task+0x1b2/0x250 [ 199.455270] cpuset_attach+0x670/0x12c0 [ 199.459274] ? cpuset_cancel_attach+0x140/0x140 [ 199.463959] cgroup_migrate_execute+0xbbd/0x1b00 [ 199.468740] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 199.474211] cgroup_attach_task+0x642/0x10d0 [ 199.478622] ? kmsan_internal_memset_shadow+0xc6/0x410 [ 199.483922] __cgroup1_procs_write+0x53b/0x670 [ 199.488516] cgroup1_procs_write+0x9b/0xb0 [ 199.492766] ? cgroup_pidlist_stop+0x1e0/0x1e0 [ 199.497448] cgroup_file_write+0x44a/0x8e0 [ 199.501749] ? cgroup_seqfile_stop+0x150/0x150 [ 199.506780] kernfs_fop_write+0x569/0x840 [ 199.510936] ? kernfs_fop_read+0x9a0/0x9a0 [ 199.515164] __vfs_write+0x1e2/0xc20 [ 199.518897] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 199.524261] ? __sb_start_write+0x10c/0x230 [ 199.528588] vfs_write+0x481/0x920 [ 199.532151] __se_sys_write+0x17a/0x370 [ 199.536144] __x64_sys_write+0x4a/0x70 [ 199.540263] do_syscall_64+0xbc/0xf0 [ 199.544001] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 199.549193] RIP: 0033:0x441c19 [ 199.552389] Code: e8 1c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 199.571313] RSP: 002b:00007ffce1d10058 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 199.579019] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441c19 [ 199.586284] RDX: 0000000000000012 RSI: 0000000020000180 RDI: 0000000000000004 [ 199.593547] RBP: 0000000000000000 R08: 0000000000000012 R09: 0000000000000045 [ 199.600893] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 199.608159] R13: 0000000000402a20 R14: 0000000000000000 R15: 0000000000000000 [ 199.615428] [ 199.617037] Uninit was created at: [ 199.620586] kmsan_internal_poison_shadow+0x92/0x150 [ 199.625963] kmsan_kmalloc+0xa6/0x130 [ 199.633429] kmem_cache_alloc+0x585/0xb60 [ 199.639745] do_set_mempolicy+0x353/0xad0 [ 199.643885] __se_sys_set_mempolicy+0x216/0x2a0 [ 199.648976] __x64_sys_set_mempolicy+0x4a/0x70 [ 199.653549] do_syscall_64+0xbc/0xf0 [ 199.657255] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 199.662427] ================================================================== [ 199.669773] Disabling lock debugging due to kernel taint [ 199.675224] Kernel panic - not syncing: panic_on_warn set ... [ 199.681112] CPU: 0 PID: 11047 Comm: syz-executor334 Tainted: G B 5.0.0+ #17 [ 199.689505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 199.698967] Call Trace: [ 199.701579] dump_stack+0x173/0x1d0 [ 199.705222] panic+0x3d1/0xb01 [ 199.708437] kmsan_report+0x29a/0x2a0 [ 199.712240] __msan_warning+0x7a/0xf0 [ 199.716049] mpol_rebind_task+0x1b2/0x250 [ 199.720349] cpuset_attach+0x670/0x12c0 [ 199.724363] ? cpuset_cancel_attach+0x140/0x140 [ 199.729058] cgroup_migrate_execute+0xbbd/0x1b00 [ 199.733839] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 199.739301] cgroup_attach_task+0x642/0x10d0 [ 199.743707] ? kmsan_internal_memset_shadow+0xc6/0x410 [ 199.749034] __cgroup1_procs_write+0x53b/0x670 [ 199.753659] cgroup1_procs_write+0x9b/0xb0 [ 199.757904] ? cgroup_pidlist_stop+0x1e0/0x1e0 [ 199.762575] cgroup_file_write+0x44a/0x8e0 [ 199.766826] ? cgroup_seqfile_stop+0x150/0x150 [ 199.771402] kernfs_fop_write+0x569/0x840 [ 199.775556] ? kernfs_fop_read+0x9a0/0x9a0 [ 199.779784] __vfs_write+0x1e2/0xc20 [ 199.783508] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 199.788927] ? __sb_start_write+0x10c/0x230 [ 199.793252] vfs_write+0x481/0x920 [ 199.796852] __se_sys_write+0x17a/0x370 [ 199.800849] __x64_sys_write+0x4a/0x70 [ 199.804831] do_syscall_64+0xbc/0xf0 [ 199.808559] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 199.813743] RIP: 0033:0x441c19 [ 199.816929] Code: e8 1c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 199.835833] RSP: 002b:00007ffce1d10058 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 199.843577] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441c19 [ 199.850843] RDX: 0000000000000012 RSI: 0000000020000180 RDI: 0000000000000004 [ 199.858108] RBP: 0000000000000000 R08: 0000000000000012 R09: 0000000000000045 [ 199.865375] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 199.872629] R13: 0000000000402a20 R14: 0000000000000000 R15: 0000000000000000 [ 199.880653] Kernel Offset: disabled [ 199.884284] Rebooting in 86400 seconds..