[ 104.762288][ T32] audit: type=1800 audit(1582516057.829:25): pid=11122 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 104.793416][ T32] audit: type=1800 audit(1582516057.859:26): pid=11122 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 104.833349][ T32] audit: type=1800 audit(1582516057.889:27): pid=11122 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[ 106.493593][T11185] ssh (11185) used greatest stack depth: 3904 bytes left . Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 115.966701][T11274] IPVS: ftp: loaded support on port[0] = 21 [ 116.029828][T11274] ===================================================== [ 116.036799][T11274] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 116.045029][T11274] CPU: 1 PID: 11274 Comm: syz-executor915 Not tainted 5.6.0-rc2-syzkaller #0 [ 116.053804][T11274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 116.063918][T11274] Call Trace: [ 116.067202][T11274] dump_stack+0x1c9/0x220 [ 116.071530][T11274] kmsan_report+0xf7/0x1e0 [ 116.075938][T11274] __msan_warning+0x58/0xa0 [ 116.080443][T11274] ethnl_update_bitset32+0x2c85/0x3860 [ 116.085912][T11274] ? kmsan_get_metadata+0x11d/0x180 [ 116.091114][T11274] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 116.097405][T11274] ? kmsan_memcpy_metadata+0xb/0x10 [ 116.102662][T11274] ? __msan_memcpy+0x43/0x50 [ 116.107246][T11274] ethnl_update_bitset+0x11c/0x130 [ 116.112379][T11274] ethnl_set_linkmodes+0x9f9/0x1430 [ 116.117617][T11274] ? kmsan_get_metadata+0x11d/0x180 [ 116.122859][T11274] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 116.128661][T11274] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 116.134080][T11274] genl_rcv_msg+0x205e/0x2460 [ 116.138800][T11274] netlink_rcv_skb+0x451/0x650 [ 116.143557][T11274] ? genl_unbind+0x380/0x380 [ 116.148137][T11274] genl_rcv+0x63/0x80 [ 116.152104][T11274] netlink_unicast+0xf9e/0x1100 [ 116.156969][T11274] ? genl_pernet_exit+0x90/0x90 [ 116.161825][T11274] netlink_sendmsg+0x1246/0x14d0 [ 116.166768][T11274] ? netlink_getsockopt+0x1440/0x1440 [ 116.172223][T11274] ____sys_sendmsg+0x12b6/0x1350 [ 116.177166][T11274] __sys_sendmsg+0x451/0x5f0 [ 116.181766][T11274] ? __fpregs_load_activate+0x38c/0x3c0 [ 116.187300][T11274] ? kmsan_get_metadata+0x11d/0x180 [ 116.192495][T11274] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 116.198297][T11274] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 116.204348][T11274] ? prepare_exit_to_usermode+0x1ca/0x520 [ 116.210056][T11274] __se_sys_sendmsg+0x97/0xb0 [ 116.214739][T11274] __x64_sys_sendmsg+0x4a/0x70 [ 116.219614][T11274] do_syscall_64+0xb8/0x160 [ 116.224113][T11274] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.229990][T11274] RIP: 0033:0x445239 [ 116.234078][T11274] 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 [ 116.254282][T11274] RSP: 002b:00007fff5ff69be8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 116.262684][T11274] RAX: ffffffffffffffda RBX: 00007fff5ff69c00 RCX: 0000000000445239 [ 116.270653][T11274] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 116.278619][T11274] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 116.286589][T11274] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 116.294603][T11274] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 116.302580][T11274] [ 116.304891][T11274] Uninit was created at: [ 116.309117][T11274] kmsan_internal_poison_shadow+0x66/0xd0 [ 116.314819][T11274] kmsan_slab_alloc+0x8a/0xe0 [ 116.319476][T11274] __kmalloc_node_track_caller+0xb40/0x1200 [ 116.325363][T11274] __alloc_skb+0x2fd/0xac0 [ 116.329764][T11274] netlink_sendmsg+0x7d3/0x14d0 [ 116.334605][T11274] ____sys_sendmsg+0x12b6/0x1350 [ 116.339520][T11274] __sys_sendmsg+0x451/0x5f0 [ 116.344091][T11274] __se_sys_sendmsg+0x97/0xb0 [ 116.348762][T11274] __x64_sys_sendmsg+0x4a/0x70 [ 116.353547][T11274] do_syscall_64+0xb8/0x160 [ 116.358047][T11274] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.363921][T11274] ===================================================== [ 116.370839][T11274] Disabling lock debugging due to kernel taint [ 116.376979][T11274] Kernel panic - not syncing: panic_on_warn set ... [ 116.383558][T11274] CPU: 1 PID: 11274 Comm: syz-executor915 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 116.393762][T11274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 116.403868][T11274] Call Trace: [ 116.407195][T11274] dump_stack+0x1c9/0x220 [ 116.411534][T11274] panic+0x3d5/0xc3e [ 116.415445][T11274] kmsan_report+0x1df/0x1e0 [ 116.419940][T11274] __msan_warning+0x58/0xa0 [ 116.424448][T11274] ethnl_update_bitset32+0x2c85/0x3860 [ 116.429918][T11274] ? kmsan_get_metadata+0x11d/0x180 [ 116.435117][T11274] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 116.441269][T11274] ? kmsan_memcpy_metadata+0xb/0x10 [ 116.446464][T11274] ? __msan_memcpy+0x43/0x50 [ 116.451064][T11274] ethnl_update_bitset+0x11c/0x130 [ 116.456177][T11274] ethnl_set_linkmodes+0x9f9/0x1430 [ 116.461433][T11274] ? kmsan_get_metadata+0x11d/0x180 [ 116.466629][T11274] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 116.472419][T11274] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 116.477788][T11274] genl_rcv_msg+0x205e/0x2460 [ 116.482478][T11274] netlink_rcv_skb+0x451/0x650 [ 116.487340][T11274] ? genl_unbind+0x380/0x380 [ 116.492082][T11274] genl_rcv+0x63/0x80 [ 116.496056][T11274] netlink_unicast+0xf9e/0x1100 [ 116.500902][T11274] ? genl_pernet_exit+0x90/0x90 [ 116.505749][T11274] netlink_sendmsg+0x1246/0x14d0 [ 116.510691][T11274] ? netlink_getsockopt+0x1440/0x1440 [ 116.516750][T11274] ____sys_sendmsg+0x12b6/0x1350 [ 116.521694][T11274] __sys_sendmsg+0x451/0x5f0 [ 116.526290][T11274] ? __fpregs_load_activate+0x38c/0x3c0 [ 116.531831][T11274] ? kmsan_get_metadata+0x11d/0x180 [ 116.537522][T11274] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 116.543327][T11274] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 116.549396][T11274] ? prepare_exit_to_usermode+0x1ca/0x520 [ 116.556007][T11274] __se_sys_sendmsg+0x97/0xb0 [ 116.560679][T11274] __x64_sys_sendmsg+0x4a/0x70 [ 116.565436][T11274] do_syscall_64+0xb8/0x160 [ 116.569935][T11274] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.575919][T11274] RIP: 0033:0x445239 [ 116.579852][T11274] 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 [ 116.599454][T11274] RSP: 002b:00007fff5ff69be8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 116.607856][T11274] RAX: ffffffffffffffda RBX: 00007fff5ff69c00 RCX: 0000000000445239 [ 116.615827][T11274] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 116.623790][T11274] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 116.631795][T11274] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 116.639752][T11274] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 116.649157][T11274] Kernel Offset: 0x1b000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 116.660784][T11274] Rebooting in 86400 seconds..