[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 103.100939][ T32] audit: type=1800 audit(1582530158.140:25): pid=11709 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 103.132052][ T32] audit: type=1800 audit(1582530158.170:26): pid=11709 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 103.175109][ T32] audit: type=1800 audit(1582530158.200:27): pid=11709 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 '10.128.0.182' (ECDSA) to the list of known hosts. syzkaller login: [ 124.317304][T11865] IPVS: ftp: loaded support on port[0] = 21 [ 124.321761][T11870] IPVS: ftp: loaded support on port[0] = 21 [ 124.343495][T11863] IPVS: ftp: loaded support on port[0] = 21 [ 124.357135][T11871] IPVS: ftp: loaded support on port[0] = 21 [ 124.375173][T11869] IPVS: ftp: loaded support on port[0] = 21 [ 124.380210][T11872] IPVS: ftp: loaded support on port[0] = 21 executing program [ 124.703114][T11873] ===================================================== [ 124.710092][T11873] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 124.717897][T11873] CPU: 0 PID: 11873 Comm: syz-executor239 Not tainted 5.6.0-rc2-syzkaller #0 [ 124.726647][T11873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.736816][T11873] Call Trace: [ 124.740093][T11873] dump_stack+0x1c9/0x220 [ 124.744406][T11873] kmsan_report+0xf7/0x1e0 [ 124.748806][T11873] __msan_warning+0x58/0xa0 [ 124.753290][T11873] ethnl_update_bitset32+0x2c85/0x3860 [ 124.758739][T11873] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 124.764872][T11873] ? kmsan_memcpy_metadata+0xb/0x10 [ 124.770051][T11873] ? __msan_memcpy+0x43/0x50 [ 124.774624][T11873] ethnl_update_bitset+0x11c/0x130 [ 124.779723][T11873] ethnl_set_linkmodes+0x9f9/0x1430 [ 124.784916][T11873] ? kmsan_get_metadata+0x11d/0x180 [ 124.790129][T11873] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 124.795923][T11873] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 124.801282][T11873] genl_rcv_msg+0x205e/0x2460 [ 124.805961][T11873] netlink_rcv_skb+0x451/0x650 [ 124.810708][T11873] ? genl_unbind+0x380/0x380 [ 124.815311][T11873] genl_rcv+0x63/0x80 [ 124.819281][T11873] netlink_unicast+0xf9e/0x1100 [ 124.824112][T11873] ? genl_pernet_exit+0x90/0x90 [ 124.828968][T11873] netlink_sendmsg+0x1246/0x14d0 [ 124.833897][T11873] ? netlink_getsockopt+0x1440/0x1440 [ 124.839247][T11873] ____sys_sendmsg+0x12b6/0x1350 [ 124.844170][T11873] __sys_sendmsg+0x451/0x5f0 [ 124.848761][T11873] ? __fpregs_load_activate+0x38c/0x3c0 [ 124.854291][T11873] ? kmsan_get_metadata+0x11d/0x180 [ 124.859467][T11873] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 124.865247][T11873] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 124.871293][T11873] ? prepare_exit_to_usermode+0x1ca/0x520 [ 124.877003][T11873] __se_sys_sendmsg+0x97/0xb0 [ 124.881654][T11873] __x64_sys_sendmsg+0x4a/0x70 [ 124.886390][T11873] do_syscall_64+0xb8/0x160 [ 124.890869][T11873] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 124.896732][T11873] RIP: 0033:0x445c39 [ 124.900618][T11873] Code: e8 4c e8 ff ff 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 fb cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 124.920195][T11873] RSP: 002b:00007ffe45159bd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 124.928576][T11873] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445c39 [ 124.936519][T11873] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 124.944483][T11873] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000bb1414ac [ 124.952434][T11873] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 124.960375][T11873] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 124.968334][T11873] [ 124.970643][T11873] Uninit was created at: [ 124.974864][T11873] kmsan_internal_poison_shadow+0x66/0xd0 [ 124.980568][T11873] kmsan_slab_alloc+0x8a/0xe0 [ 124.985218][T11873] __kmalloc_node_track_caller+0xb40/0x1200 [ 124.991083][T11873] __alloc_skb+0x2fd/0xac0 [ 124.995476][T11873] netlink_sendmsg+0x7d3/0x14d0 [ 125.000299][T11873] ____sys_sendmsg+0x12b6/0x1350 [ 125.005215][T11873] __sys_sendmsg+0x451/0x5f0 [ 125.009791][T11873] __se_sys_sendmsg+0x97/0xb0 [ 125.014452][T11873] __x64_sys_sendmsg+0x4a/0x70 [ 125.019220][T11873] do_syscall_64+0xb8/0x160 [ 125.023733][T11873] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 125.029588][T11873] ===================================================== [ 125.036487][T11873] Disabling lock debugging due to kernel taint [ 125.042612][T11873] Kernel panic - not syncing: panic_on_warn set ... [ 125.049172][T11873] CPU: 0 PID: 11873 Comm: syz-executor239 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 125.059302][T11873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.069329][T11873] Call Trace: [ 125.072594][T11873] dump_stack+0x1c9/0x220 [ 125.076913][T11873] panic+0x3d5/0xc3e [ 125.080803][T11873] kmsan_report+0x1df/0x1e0 [ 125.085287][T11873] __msan_warning+0x58/0xa0 [ 125.089767][T11873] ethnl_update_bitset32+0x2c85/0x3860 [ 125.095223][T11873] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 125.101352][T11873] ? kmsan_memcpy_metadata+0xb/0x10 [ 125.106524][T11873] ? __msan_memcpy+0x43/0x50 [ 125.111093][T11873] ethnl_update_bitset+0x11c/0x130 [ 125.116190][T11873] ethnl_set_linkmodes+0x9f9/0x1430 [ 125.121398][T11873] ? kmsan_get_metadata+0x11d/0x180 [ 125.126567][T11873] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 125.132345][T11873] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 125.137687][T11873] genl_rcv_msg+0x205e/0x2460 [ 125.142356][T11873] netlink_rcv_skb+0x451/0x650 [ 125.147127][T11873] ? genl_unbind+0x380/0x380 [ 125.151697][T11873] genl_rcv+0x63/0x80 [ 125.155671][T11873] netlink_unicast+0xf9e/0x1100 [ 125.160501][T11873] ? genl_pernet_exit+0x90/0x90 [ 125.165332][T11873] netlink_sendmsg+0x1246/0x14d0 [ 125.170257][T11873] ? netlink_getsockopt+0x1440/0x1440 [ 125.175602][T11873] ____sys_sendmsg+0x12b6/0x1350 [ 125.180529][T11873] __sys_sendmsg+0x451/0x5f0 [ 125.185107][T11873] ? __fpregs_load_activate+0x38c/0x3c0 [ 125.190625][T11873] ? kmsan_get_metadata+0x11d/0x180 [ 125.195797][T11873] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 125.201579][T11873] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 125.207622][T11873] ? prepare_exit_to_usermode+0x1ca/0x520 [ 125.213320][T11873] __se_sys_sendmsg+0x97/0xb0 [ 125.217971][T11873] __x64_sys_sendmsg+0x4a/0x70 [ 125.222708][T11873] do_syscall_64+0xb8/0x160 [ 125.227185][T11873] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 125.233051][T11873] RIP: 0033:0x445c39 [ 125.236927][T11873] Code: e8 4c e8 ff ff 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 fb cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 125.256521][T11873] RSP: 002b:00007ffe45159bd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 125.264905][T11873] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445c39 [ 125.272849][T11873] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 125.280794][T11873] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000bb1414ac [ 125.288739][T11873] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 125.296682][T11873] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 125.305913][T11873] Kernel Offset: 0x17600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 125.317524][T11873] Rebooting in 86400 seconds..