[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 110.682306][ T32] audit: type=1800 audit(1582050914.752:25): pid=11445 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 110.712046][ T32] audit: type=1800 audit(1582050914.772:26): pid=11445 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 110.753341][ T32] audit: type=1800 audit(1582050914.802:27): pid=11445 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 '10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 123.162212][T11596] ===================================================== [ 123.169196][T11596] BUG: KMSAN: uninit-value in __tipc_nl_compat_dumpit+0x583/0x1290 [ 123.177079][T11596] CPU: 1 PID: 11596 Comm: syz-executor091 Not tainted 5.6.0-rc2-syzkaller #0 [ 123.185822][T11596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.195908][T11596] Call Trace: [ 123.199190][T11596] dump_stack+0x1c9/0x220 [ 123.203524][T11596] kmsan_report+0xf7/0x1e0 [ 123.208060][T11596] __msan_warning+0x58/0xa0 [ 123.212552][T11596] __tipc_nl_compat_dumpit+0x583/0x1290 [ 123.218098][T11596] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.223894][T11596] ? kmsan_get_metadata+0x11d/0x180 [ 123.229179][T11596] ? kmsan_set_origin_checked+0x95/0xf0 [ 123.234765][T11596] ? kmsan_get_metadata+0x11d/0x180 [ 123.239958][T11596] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.245762][T11596] ? __alloc_skb+0x762/0xac0 [ 123.250359][T11596] tipc_nl_compat_dumpit+0x761/0x910 [ 123.255651][T11596] tipc_nl_compat_recv+0x1382/0x2940 [ 123.261019][T11596] ? kmsan_get_metadata+0x4f/0x180 [ 123.266128][T11596] ? tipc_nl_node_reset_link_stats+0x600/0x600 [ 123.272374][T11596] ? tipc_nl_compat_link_stat_dump+0x2860/0x2860 [ 123.278746][T11596] ? tipc_netlink_compat_stop+0x40/0x40 [ 123.284432][T11596] genl_rcv_msg+0x205e/0x2460 [ 123.289143][T11596] netlink_rcv_skb+0x451/0x650 [ 123.293900][T11596] ? genl_unbind+0x380/0x380 [ 123.298500][T11596] genl_rcv+0x63/0x80 [ 123.302479][T11596] netlink_unicast+0xf9e/0x1100 [ 123.307500][T11596] ? genl_pernet_exit+0x90/0x90 [ 123.312475][T11596] netlink_sendmsg+0x1246/0x14d0 [ 123.317423][T11596] ? netlink_getsockopt+0x1440/0x1440 [ 123.322788][T11596] ____sys_sendmsg+0x12b6/0x1350 [ 123.327723][T11596] __sys_sendmsg+0x451/0x5f0 [ 123.332330][T11596] ? __fpregs_load_activate+0x38c/0x3c0 [ 123.337870][T11596] ? kmsan_get_metadata+0x11d/0x180 [ 123.343109][T11596] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.348909][T11596] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.355098][T11596] ? prepare_exit_to_usermode+0x1ca/0x520 [ 123.360915][T11596] __se_sys_sendmsg+0x97/0xb0 [ 123.365600][T11596] __x64_sys_sendmsg+0x4a/0x70 [ 123.370409][T11596] do_syscall_64+0xb8/0x160 [ 123.374921][T11596] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.380907][T11596] RIP: 0033:0x444999 [ 123.384840][T11596] 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 123.404668][T11596] RSP: 002b:00007ffeb5521998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.413079][T11596] RAX: ffffffffffffffda RBX: 00007ffeb55219a0 RCX: 0000000000444999 [ 123.421179][T11596] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 123.429582][T11596] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000401090 [ 123.437547][T11596] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402640 [ 123.445772][T11596] R13: 00000000004026d0 R14: 0000000000000000 R15: 0000000000000000 [ 123.453766][T11596] [ 123.456083][T11596] Uninit was created at: [ 123.460351][T11596] kmsan_internal_poison_shadow+0x66/0xd0 [ 123.466168][T11596] kmsan_slab_alloc+0x8a/0xe0 [ 123.471362][T11596] __kmalloc_node_track_caller+0xb40/0x1200 [ 123.477247][T11596] __alloc_skb+0x2fd/0xac0 [ 123.481657][T11596] tipc_nl_compat_dumpit+0x6e4/0x910 [ 123.487107][T11596] tipc_nl_compat_recv+0x1382/0x2940 [ 123.492556][T11596] genl_rcv_msg+0x205e/0x2460 [ 123.497291][T11596] netlink_rcv_skb+0x451/0x650 [ 123.502254][T11596] genl_rcv+0x63/0x80 [ 123.506225][T11596] netlink_unicast+0xf9e/0x1100 [ 123.511064][T11596] netlink_sendmsg+0x1246/0x14d0 [ 123.516092][T11596] ____sys_sendmsg+0x12b6/0x1350 [ 123.521027][T11596] __sys_sendmsg+0x451/0x5f0 [ 123.525743][T11596] __se_sys_sendmsg+0x97/0xb0 [ 123.530558][T11596] __x64_sys_sendmsg+0x4a/0x70 [ 123.535394][T11596] do_syscall_64+0xb8/0x160 [ 123.539895][T11596] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.545773][T11596] ===================================================== [ 123.552731][T11596] Disabling lock debugging due to kernel taint [ 123.558874][T11596] Kernel panic - not syncing: panic_on_warn set ... [ 123.565453][T11596] CPU: 1 PID: 11596 Comm: syz-executor091 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 123.575696][T11596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.585760][T11596] Call Trace: [ 123.589049][T11596] dump_stack+0x1c9/0x220 [ 123.593401][T11596] panic+0x3d5/0xc3e [ 123.597315][T11596] kmsan_report+0x1df/0x1e0 [ 123.601836][T11596] __msan_warning+0x58/0xa0 [ 123.606349][T11596] __tipc_nl_compat_dumpit+0x583/0x1290 [ 123.611886][T11596] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.617688][T11596] ? kmsan_get_metadata+0x11d/0x180 [ 123.622937][T11596] ? kmsan_set_origin_checked+0x95/0xf0 [ 123.628473][T11596] ? kmsan_get_metadata+0x11d/0x180 [ 123.633788][T11596] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.639587][T11596] ? __alloc_skb+0x762/0xac0 [ 123.644287][T11596] tipc_nl_compat_dumpit+0x761/0x910 [ 123.649684][T11596] tipc_nl_compat_recv+0x1382/0x2940 [ 123.654972][T11596] ? kmsan_get_metadata+0x4f/0x180 [ 123.660091][T11596] ? tipc_nl_node_reset_link_stats+0x600/0x600 [ 123.666295][T11596] ? tipc_nl_compat_link_stat_dump+0x2860/0x2860 [ 123.672649][T11596] ? tipc_netlink_compat_stop+0x40/0x40 [ 123.678208][T11596] genl_rcv_msg+0x205e/0x2460 [ 123.682902][T11596] netlink_rcv_skb+0x451/0x650 [ 123.687660][T11596] ? genl_unbind+0x380/0x380 [ 123.692249][T11596] genl_rcv+0x63/0x80 [ 123.696229][T11596] netlink_unicast+0xf9e/0x1100 [ 123.701180][T11596] ? genl_pernet_exit+0x90/0x90 [ 123.706172][T11596] netlink_sendmsg+0x1246/0x14d0 [ 123.711113][T11596] ? netlink_getsockopt+0x1440/0x1440 [ 123.716478][T11596] ____sys_sendmsg+0x12b6/0x1350 [ 123.721480][T11596] __sys_sendmsg+0x451/0x5f0 [ 123.726140][T11596] ? __fpregs_load_activate+0x38c/0x3c0 [ 123.731779][T11596] ? kmsan_get_metadata+0x11d/0x180 [ 123.737072][T11596] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.742934][T11596] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.749009][T11596] ? prepare_exit_to_usermode+0x1ca/0x520 [ 123.754743][T11596] __se_sys_sendmsg+0x97/0xb0 [ 123.759419][T11596] __x64_sys_sendmsg+0x4a/0x70 [ 123.764172][T11596] do_syscall_64+0xb8/0x160 [ 123.768728][T11596] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.774600][T11596] RIP: 0033:0x444999 [ 123.778486][T11596] 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 123.798122][T11596] RSP: 002b:00007ffeb5521998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.806528][T11596] RAX: ffffffffffffffda RBX: 00007ffeb55219a0 RCX: 0000000000444999 [ 123.814498][T11596] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 123.822498][T11596] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000401090 [ 123.830472][T11596] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402640 [ 123.838436][T11596] R13: 00000000004026d0 R14: 0000000000000000 R15: 0000000000000000 [ 123.848157][T11596] Kernel Offset: 0xac00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 123.859699][T11596] Rebooting in 86400 seconds..