[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 108.646308][ T32] audit: type=1800 audit(1582510994.718:25): pid=11297 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 108.675229][ T32] audit: type=1800 audit(1582510994.748:26): pid=11297 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 108.712136][ T32] audit: type=1800 audit(1582510994.768:27): pid=11297 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 '10.128.10.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 124.135676][T11449] IPVS: ftp: loaded support on port[0] = 21 [ 124.200694][T11449] ===================================================== [ 124.208236][T11449] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 124.216453][T11449] CPU: 1 PID: 11449 Comm: syz-executor161 Not tainted 5.6.0-rc2-syzkaller #0 [ 124.225613][T11449] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.235965][T11449] Call Trace: [ 124.239580][T11449] dump_stack+0x1c9/0x220 [ 124.244458][T11449] kmsan_report+0xf7/0x1e0 [ 124.248880][T11449] __msan_warning+0x58/0xa0 [ 124.253517][T11449] ethnl_update_bitset32+0x2c85/0x3860 [ 124.259414][T11449] ? kmsan_get_metadata+0x11d/0x180 [ 124.264634][T11449] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 124.271025][T11449] ? kmsan_memcpy_metadata+0xb/0x10 [ 124.276385][T11449] ? __msan_memcpy+0x43/0x50 [ 124.281115][T11449] ethnl_update_bitset+0x11c/0x130 [ 124.286469][T11449] ethnl_set_linkmodes+0x9f9/0x1430 [ 124.291844][T11449] ? kmsan_get_metadata+0x11d/0x180 [ 124.297170][T11449] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 124.302993][T11449] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 124.308749][T11449] genl_rcv_msg+0x205e/0x2460 [ 124.313614][T11449] netlink_rcv_skb+0x451/0x650 [ 124.318489][T11449] ? genl_unbind+0x380/0x380 [ 124.323171][T11449] genl_rcv+0x63/0x80 [ 124.327407][T11449] netlink_unicast+0xf9e/0x1100 [ 124.332423][T11449] ? genl_pernet_exit+0x90/0x90 [ 124.337622][T11449] netlink_sendmsg+0x1246/0x14d0 [ 124.342568][T11449] ? netlink_getsockopt+0x1440/0x1440 [ 124.348062][T11449] ____sys_sendmsg+0x12b6/0x1350 [ 124.353148][T11449] __sys_sendmsg+0x451/0x5f0 [ 124.357936][T11449] ? __fpregs_load_activate+0x38c/0x3c0 [ 124.363691][T11449] ? kmsan_get_metadata+0x11d/0x180 [ 124.369184][T11449] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 124.375306][T11449] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 124.381687][T11449] ? prepare_exit_to_usermode+0x1ca/0x520 [ 124.387806][T11449] __se_sys_sendmsg+0x97/0xb0 [ 124.392682][T11449] __x64_sys_sendmsg+0x4a/0x70 [ 124.397624][T11449] do_syscall_64+0xb8/0x160 [ 124.402260][T11449] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 124.408326][T11449] RIP: 0033:0x445239 [ 124.412225][T11449] 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 8b d2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 124.432200][T11449] RSP: 002b:00007ffc4eb5d1c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 124.440624][T11449] RAX: ffffffffffffffda RBX: 00007ffc4eb5d1e0 RCX: 0000000000445239 [ 124.448664][T11449] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 124.456648][T11449] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 124.464790][T11449] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 124.472901][T11449] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 124.481150][T11449] [ 124.483482][T11449] Uninit was created at: [ 124.487935][T11449] kmsan_internal_poison_shadow+0x66/0xd0 [ 124.493803][T11449] kmsan_slab_alloc+0x8a/0xe0 [ 124.498636][T11449] __kmalloc_node_track_caller+0xb40/0x1200 [ 124.504533][T11449] __alloc_skb+0x2fd/0xac0 [ 124.508961][T11449] netlink_sendmsg+0x7d3/0x14d0 [ 124.514183][T11449] ____sys_sendmsg+0x12b6/0x1350 [ 124.519363][T11449] __sys_sendmsg+0x451/0x5f0 [ 124.524116][T11449] __se_sys_sendmsg+0x97/0xb0 [ 124.528902][T11449] __x64_sys_sendmsg+0x4a/0x70 [ 124.533816][T11449] do_syscall_64+0xb8/0x160 [ 124.538544][T11449] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 124.544432][T11449] ===================================================== [ 124.551359][T11449] Disabling lock debugging due to kernel taint [ 124.557624][T11449] Kernel panic - not syncing: panic_on_warn set ... [ 124.564356][T11449] CPU: 1 PID: 11449 Comm: syz-executor161 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 124.575027][T11449] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.585090][T11449] Call Trace: [ 124.588396][T11449] dump_stack+0x1c9/0x220 [ 124.593042][T11449] panic+0x3d5/0xc3e [ 124.598173][T11449] kmsan_report+0x1df/0x1e0 [ 124.602695][T11449] __msan_warning+0x58/0xa0 [ 124.607358][T11449] ethnl_update_bitset32+0x2c85/0x3860 [ 124.612830][T11449] ? kmsan_get_metadata+0x11d/0x180 [ 124.618268][T11449] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 124.624560][T11449] ? kmsan_memcpy_metadata+0xb/0x10 [ 124.629762][T11449] ? __msan_memcpy+0x43/0x50 [ 124.634355][T11449] ethnl_update_bitset+0x11c/0x130 [ 124.639686][T11449] ethnl_set_linkmodes+0x9f9/0x1430 [ 124.645130][T11449] ? kmsan_get_metadata+0x11d/0x180 [ 124.650485][T11449] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 124.656311][T11449] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 124.661704][T11449] genl_rcv_msg+0x205e/0x2460 [ 124.666591][T11449] netlink_rcv_skb+0x451/0x650 [ 124.671356][T11449] ? genl_unbind+0x380/0x380 [ 124.676093][T11449] genl_rcv+0x63/0x80 [ 124.680077][T11449] netlink_unicast+0xf9e/0x1100 [ 124.685029][T11449] ? genl_pernet_exit+0x90/0x90 [ 124.690071][T11449] netlink_sendmsg+0x1246/0x14d0 [ 124.695387][T11449] ? netlink_getsockopt+0x1440/0x1440 [ 124.700780][T11449] ____sys_sendmsg+0x12b6/0x1350 [ 124.705933][T11449] __sys_sendmsg+0x451/0x5f0 [ 124.710633][T11449] ? __fpregs_load_activate+0x38c/0x3c0 [ 124.716385][T11449] ? kmsan_get_metadata+0x11d/0x180 [ 124.721907][T11449] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 124.727725][T11449] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 124.734466][T11449] ? prepare_exit_to_usermode+0x1ca/0x520 [ 124.740323][T11449] __se_sys_sendmsg+0x97/0xb0 [ 124.745184][T11449] __x64_sys_sendmsg+0x4a/0x70 [ 124.750145][T11449] do_syscall_64+0xb8/0x160 [ 124.754667][T11449] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 124.760749][T11449] RIP: 0033:0x445239 [ 124.764935][T11449] 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 8b d2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 124.785584][T11449] RSP: 002b:00007ffc4eb5d1c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 124.794599][T11449] RAX: ffffffffffffffda RBX: 00007ffc4eb5d1e0 RCX: 0000000000445239 [ 124.803248][T11449] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 124.811245][T11449] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 124.819437][T11449] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 124.827577][T11449] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 124.837480][T11449] Kernel Offset: 0xa00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 124.849210][T11449] Rebooting in 86400 seconds..