[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 109.570650][ T32] audit: type=1800 audit(1582396088.625:25): pid=11356 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 109.602517][ T32] audit: type=1800 audit(1582396088.655:26): pid=11356 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 109.642734][ T32] audit: type=1800 audit(1582396088.685:27): pid=11356 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 syzkaller login: [ 112.936630][T11493] sshd (11493) used greatest stack depth: 3352 bytes left Warning: Permanently added '10.128.0.209' (ECDSA) to the list of known hosts. executing program [ 121.181472][T11508] IPVS: ftp: loaded support on port[0] = 21 [ 121.244237][T11508] ===================================================== [ 121.251226][T11508] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 121.259023][T11508] CPU: 0 PID: 11508 Comm: syz-executor729 Not tainted 5.6.0-rc2-syzkaller #0 [ 121.267808][T11508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.277964][T11508] Call Trace: [ 121.281282][T11508] dump_stack+0x1c9/0x220 [ 121.285611][T11508] kmsan_report+0xf7/0x1e0 [ 121.290025][T11508] __msan_warning+0x58/0xa0 [ 121.294634][T11508] ethnl_update_bitset32+0x2c85/0x3860 [ 121.300203][T11508] ? kmsan_get_metadata+0x11d/0x180 [ 121.305441][T11508] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 121.311595][T11508] ? kmsan_memcpy_metadata+0xb/0x10 [ 121.316848][T11508] ? __msan_memcpy+0x43/0x50 [ 121.321439][T11508] ethnl_update_bitset+0x11c/0x130 [ 121.327064][T11508] ethnl_set_linkmodes+0x9f9/0x1430 [ 121.332286][T11508] ? kmsan_get_metadata+0x11d/0x180 [ 121.337541][T11508] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.343438][T11508] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 121.348799][T11508] genl_rcv_msg+0x205e/0x2460 [ 121.354559][T11508] netlink_rcv_skb+0x451/0x650 [ 121.359350][T11508] ? genl_unbind+0x380/0x380 [ 121.363936][T11508] genl_rcv+0x63/0x80 [ 121.368037][T11508] netlink_unicast+0xf9e/0x1100 [ 121.372883][T11508] ? genl_pernet_exit+0x90/0x90 [ 121.379478][T11508] netlink_sendmsg+0x1246/0x14d0 [ 121.384434][T11508] ? netlink_getsockopt+0x1440/0x1440 [ 121.389809][T11508] ____sys_sendmsg+0x12b6/0x1350 [ 121.394811][T11508] __sys_sendmsg+0x451/0x5f0 [ 121.399451][T11508] ? __fpregs_load_activate+0x38c/0x3c0 [ 121.404984][T11508] ? kmsan_get_metadata+0x11d/0x180 [ 121.410192][T11508] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.415992][T11508] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 121.422081][T11508] ? prepare_exit_to_usermode+0x1ca/0x520 [ 121.427913][T11508] __se_sys_sendmsg+0x97/0xb0 [ 121.432582][T11508] __x64_sys_sendmsg+0x4a/0x70 [ 121.437360][T11508] do_syscall_64+0xb8/0x160 [ 121.441865][T11508] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.447841][T11508] RIP: 0033:0x445239 [ 121.451806][T11508] 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 [ 121.472335][T11508] RSP: 002b:00007ffe1b6b07a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 121.480975][T11508] RAX: ffffffffffffffda RBX: 00007ffe1b6b07c0 RCX: 0000000000445239 [ 121.488966][T11508] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 121.496955][T11508] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 121.504948][T11508] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 121.512916][T11508] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 121.520890][T11508] [ 121.523307][T11508] Uninit was created at: [ 121.527831][T11508] kmsan_internal_poison_shadow+0x66/0xd0 [ 121.533562][T11508] kmsan_slab_alloc+0x8a/0xe0 [ 121.538240][T11508] __kmalloc_node_track_caller+0xb40/0x1200 [ 121.544129][T11508] __alloc_skb+0x2fd/0xac0 [ 121.548541][T11508] netlink_sendmsg+0x7d3/0x14d0 [ 121.553426][T11508] ____sys_sendmsg+0x12b6/0x1350 [ 121.558359][T11508] __sys_sendmsg+0x451/0x5f0 [ 121.562932][T11508] __se_sys_sendmsg+0x97/0xb0 [ 121.567655][T11508] __x64_sys_sendmsg+0x4a/0x70 [ 121.572411][T11508] do_syscall_64+0xb8/0x160 [ 121.576919][T11508] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.582875][T11508] ===================================================== [ 121.589795][T11508] Disabling lock debugging due to kernel taint [ 121.595972][T11508] Kernel panic - not syncing: panic_on_warn set ... [ 121.602553][T11508] CPU: 0 PID: 11508 Comm: syz-executor729 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 121.612686][T11508] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.622745][T11508] Call Trace: [ 121.626027][T11508] dump_stack+0x1c9/0x220 [ 121.630962][T11508] panic+0x3d5/0xc3e [ 121.634875][T11508] kmsan_report+0x1df/0x1e0 [ 121.639383][T11508] __msan_warning+0x58/0xa0 [ 121.643896][T11508] ethnl_update_bitset32+0x2c85/0x3860 [ 121.649422][T11508] ? kmsan_get_metadata+0x11d/0x180 [ 121.654624][T11508] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 121.660772][T11508] ? kmsan_memcpy_metadata+0xb/0x10 [ 121.665969][T11508] ? __msan_memcpy+0x43/0x50 [ 121.670549][T11508] ethnl_update_bitset+0x11c/0x130 [ 121.677057][T11508] ethnl_set_linkmodes+0x9f9/0x1430 [ 121.682467][T11508] ? kmsan_get_metadata+0x11d/0x180 [ 121.687821][T11508] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.693665][T11508] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 121.699086][T11508] genl_rcv_msg+0x205e/0x2460 [ 121.703830][T11508] netlink_rcv_skb+0x451/0x650 [ 121.708597][T11508] ? genl_unbind+0x380/0x380 [ 121.713281][T11508] genl_rcv+0x63/0x80 [ 121.717419][T11508] netlink_unicast+0xf9e/0x1100 [ 121.722300][T11508] ? genl_pernet_exit+0x90/0x90 [ 121.727160][T11508] netlink_sendmsg+0x1246/0x14d0 [ 121.732100][T11508] ? netlink_getsockopt+0x1440/0x1440 [ 121.737508][T11508] ____sys_sendmsg+0x12b6/0x1350 [ 121.742474][T11508] __sys_sendmsg+0x451/0x5f0 [ 121.747077][T11508] ? __fpregs_load_activate+0x38c/0x3c0 [ 121.752764][T11508] ? kmsan_get_metadata+0x11d/0x180 [ 121.757966][T11508] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.763779][T11508] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 121.769840][T11508] ? prepare_exit_to_usermode+0x1ca/0x520 [ 121.775589][T11508] __se_sys_sendmsg+0x97/0xb0 [ 121.780256][T11508] __x64_sys_sendmsg+0x4a/0x70 [ 121.785046][T11508] do_syscall_64+0xb8/0x160 [ 121.789552][T11508] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.795437][T11508] RIP: 0033:0x445239 [ 121.799322][T11508] 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 [ 121.819042][T11508] RSP: 002b:00007ffe1b6b07a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 121.827547][T11508] RAX: ffffffffffffffda RBX: 00007ffe1b6b07c0 RCX: 0000000000445239 [ 121.835557][T11508] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 121.843529][T11508] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 121.851493][T11508] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 121.859485][T11508] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 121.868830][T11508] Kernel Offset: 0x10a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 121.880461][T11508] Rebooting in 86400 seconds..