[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 107.071173][ T32] audit: type=1800 audit(1583018625.119:25): pid=11155 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 107.102864][ T32] audit: type=1800 audit(1583018625.149:26): pid=11155 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 107.143014][ T32] audit: type=1800 audit(1583018625.179:27): pid=11155 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 '10.128.15.204' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 121.294215][T11306] IPVS: ftp: loaded support on port[0] = 21 [ 121.357931][T11306] ===================================================== [ 121.365141][T11306] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 121.372937][T11306] CPU: 1 PID: 11306 Comm: syz-executor171 Not tainted 5.6.0-rc2-syzkaller #0 [ 121.381675][T11306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.391711][T11306] Call Trace: [ 121.395010][T11306] dump_stack+0x1c9/0x220 [ 121.399327][T11306] kmsan_report+0xf7/0x1e0 [ 121.403729][T11306] __msan_warning+0x58/0xa0 [ 121.408217][T11306] ethnl_update_bitset32+0x2c85/0x3860 [ 121.413683][T11306] ? kmsan_get_metadata+0x11d/0x180 [ 121.418877][T11306] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 121.425017][T11306] ? kmsan_memcpy_metadata+0xb/0x10 [ 121.430211][T11306] ? __msan_memcpy+0x43/0x50 [ 121.434787][T11306] ethnl_update_bitset+0x11c/0x130 [ 121.439935][T11306] ethnl_set_linkmodes+0x9f9/0x1430 [ 121.445128][T11306] ? kmsan_get_metadata+0x11d/0x180 [ 121.450313][T11306] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.456101][T11306] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 121.461451][T11306] genl_rcv_msg+0x205e/0x2460 [ 121.466134][T11306] netlink_rcv_skb+0x451/0x650 [ 121.470882][T11306] ? genl_unbind+0x380/0x380 [ 121.475460][T11306] genl_rcv+0x63/0x80 [ 121.479424][T11306] netlink_unicast+0xf9e/0x1100 [ 121.484269][T11306] ? genl_pernet_exit+0x90/0x90 [ 121.489135][T11306] netlink_sendmsg+0x1246/0x14d0 [ 121.494089][T11306] ? netlink_getsockopt+0x1440/0x1440 [ 121.499447][T11306] ____sys_sendmsg+0x12b6/0x1350 [ 121.504385][T11306] __sys_sendmsg+0x451/0x5f0 [ 121.508974][T11306] ? __fpregs_load_activate+0x38c/0x3c0 [ 121.514505][T11306] ? kmsan_get_metadata+0x11d/0x180 [ 121.519699][T11306] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.525490][T11306] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 121.531639][T11306] ? prepare_exit_to_usermode+0x1ca/0x520 [ 121.537349][T11306] __se_sys_sendmsg+0x97/0xb0 [ 121.542037][T11306] __x64_sys_sendmsg+0x4a/0x70 [ 121.546792][T11306] do_syscall_64+0xb8/0x160 [ 121.551280][T11306] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.557154][T11306] RIP: 0033:0x445249 [ 121.561028][T11306] 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 [ 121.580622][T11306] RSP: 002b:00007fff610329a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 121.589011][T11306] RAX: ffffffffffffffda RBX: 00007fff610329c0 RCX: 0000000000445249 [ 121.596981][T11306] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 121.604939][T11306] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 121.612889][T11306] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 121.620835][T11306] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 121.628794][T11306] [ 121.631102][T11306] Uninit was created at: [ 121.635324][T11306] kmsan_internal_poison_shadow+0x66/0xd0 [ 121.641019][T11306] kmsan_slab_alloc+0x8a/0xe0 [ 121.645672][T11306] __kmalloc_node_track_caller+0xb40/0x1200 [ 121.651540][T11306] __alloc_skb+0x2fd/0xac0 [ 121.655930][T11306] netlink_sendmsg+0x7d3/0x14d0 [ 121.660755][T11306] ____sys_sendmsg+0x12b6/0x1350 [ 121.665666][T11306] __sys_sendmsg+0x451/0x5f0 [ 121.670231][T11306] __se_sys_sendmsg+0x97/0xb0 [ 121.674885][T11306] __x64_sys_sendmsg+0x4a/0x70 [ 121.679627][T11306] do_syscall_64+0xb8/0x160 [ 121.684107][T11306] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.689979][T11306] ===================================================== [ 121.696894][T11306] Disabling lock debugging due to kernel taint [ 121.703020][T11306] Kernel panic - not syncing: panic_on_warn set ... [ 121.709595][T11306] CPU: 1 PID: 11306 Comm: syz-executor171 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 121.719713][T11306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.729744][T11306] Call Trace: [ 121.733018][T11306] dump_stack+0x1c9/0x220 [ 121.737332][T11306] panic+0x3d5/0xc3e [ 121.741240][T11306] kmsan_report+0x1df/0x1e0 [ 121.745723][T11306] __msan_warning+0x58/0xa0 [ 121.750208][T11306] ethnl_update_bitset32+0x2c85/0x3860 [ 121.755653][T11306] ? kmsan_get_metadata+0x11d/0x180 [ 121.760848][T11306] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 121.767127][T11306] ? kmsan_memcpy_metadata+0xb/0x10 [ 121.772319][T11306] ? __msan_memcpy+0x43/0x50 [ 121.776917][T11306] ethnl_update_bitset+0x11c/0x130 [ 121.782020][T11306] ethnl_set_linkmodes+0x9f9/0x1430 [ 121.787215][T11306] ? kmsan_get_metadata+0x11d/0x180 [ 121.792452][T11306] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.798250][T11306] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 121.803599][T11306] genl_rcv_msg+0x205e/0x2460 [ 121.808277][T11306] netlink_rcv_skb+0x451/0x650 [ 121.813021][T11306] ? genl_unbind+0x380/0x380 [ 121.817596][T11306] genl_rcv+0x63/0x80 [ 121.821597][T11306] netlink_unicast+0xf9e/0x1100 [ 121.826430][T11306] ? genl_pernet_exit+0x90/0x90 [ 121.831302][T11306] netlink_sendmsg+0x1246/0x14d0 [ 121.836229][T11306] ? netlink_getsockopt+0x1440/0x1440 [ 121.841578][T11306] ____sys_sendmsg+0x12b6/0x1350 [ 121.846509][T11306] __sys_sendmsg+0x451/0x5f0 [ 121.851094][T11306] ? __fpregs_load_activate+0x38c/0x3c0 [ 121.856616][T11306] ? kmsan_get_metadata+0x11d/0x180 [ 121.861795][T11306] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.867580][T11306] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 121.873624][T11306] ? prepare_exit_to_usermode+0x1ca/0x520 [ 121.879327][T11306] __se_sys_sendmsg+0x97/0xb0 [ 121.883992][T11306] __x64_sys_sendmsg+0x4a/0x70 [ 121.888731][T11306] do_syscall_64+0xb8/0x160 [ 121.893213][T11306] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.899081][T11306] RIP: 0033:0x445249 [ 121.902954][T11306] 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 [ 121.922537][T11306] RSP: 002b:00007fff610329a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 121.930924][T11306] RAX: ffffffffffffffda RBX: 00007fff610329c0 RCX: 0000000000445249 [ 121.938870][T11306] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 121.946822][T11306] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 121.954769][T11306] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 121.962716][T11306] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 121.972050][T11306] Kernel Offset: 0xb400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 121.983592][T11306] Rebooting in 86400 seconds..