[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 108.725270][ T32] audit: type=1800 audit(1582513812.777:25): pid=11301 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 108.753805][ T32] audit: type=1800 audit(1582513812.797:26): pid=11301 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 108.803873][ T32] audit: type=1800 audit(1582513812.827:27): pid=11301 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 '10.128.0.149' (ECDSA) to the list of known hosts. syzkaller login: [ 122.559877][T11452] IPVS: ftp: loaded support on port[0] = 21 executing program [ 122.628918][T11452] ===================================================== [ 122.636052][T11452] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 122.643858][T11452] CPU: 1 PID: 11452 Comm: syz-executor223 Not tainted 5.6.0-rc2-syzkaller #0 [ 122.652629][T11452] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 122.662685][T11452] Call Trace: [ 122.665973][T11452] dump_stack+0x1c9/0x220 [ 122.670295][T11452] kmsan_report+0xf7/0x1e0 [ 122.674719][T11452] __msan_warning+0x58/0xa0 [ 122.679340][T11452] ethnl_update_bitset32+0x2c85/0x3860 [ 122.684819][T11452] ? kmsan_get_metadata+0x11d/0x180 [ 122.690045][T11452] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 122.696231][T11452] ? kmsan_memcpy_metadata+0xb/0x10 [ 122.701477][T11452] ? __msan_memcpy+0x43/0x50 [ 122.706082][T11452] ethnl_update_bitset+0x11c/0x130 [ 122.711207][T11452] ethnl_set_linkmodes+0x9f9/0x1430 [ 122.716455][T11452] ? kmsan_get_metadata+0x11d/0x180 [ 122.721657][T11452] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 122.727454][T11452] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 122.732813][T11452] genl_rcv_msg+0x205e/0x2460 [ 122.737494][T11452] netlink_rcv_skb+0x451/0x650 [ 122.742238][T11452] ? genl_unbind+0x380/0x380 [ 122.747363][T11452] genl_rcv+0x63/0x80 [ 122.751345][T11452] netlink_unicast+0xf9e/0x1100 [ 122.756192][T11452] ? genl_pernet_exit+0x90/0x90 [ 122.761047][T11452] netlink_sendmsg+0x1246/0x14d0 [ 122.766012][T11452] ? netlink_getsockopt+0x1440/0x1440 [ 122.771376][T11452] ____sys_sendmsg+0x12b6/0x1350 [ 122.776330][T11452] __sys_sendmsg+0x451/0x5f0 [ 122.780939][T11452] ? __fpregs_load_activate+0x38c/0x3c0 [ 122.786473][T11452] ? kmsan_get_metadata+0x11d/0x180 [ 122.791677][T11452] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 122.797487][T11452] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 122.803545][T11452] ? prepare_exit_to_usermode+0x1ca/0x520 [ 122.809283][T11452] __se_sys_sendmsg+0x97/0xb0 [ 122.813966][T11452] __x64_sys_sendmsg+0x4a/0x70 [ 122.818739][T11452] do_syscall_64+0xb8/0x160 [ 122.823247][T11452] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 122.829128][T11452] RIP: 0033:0x445239 [ 122.833011][T11452] 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 [ 122.852903][T11452] RSP: 002b:00007ffc0bbed6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 122.861329][T11452] RAX: ffffffffffffffda RBX: 00007ffc0bbed6d0 RCX: 0000000000445239 [ 122.869401][T11452] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 122.877372][T11452] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 122.885555][T11452] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 122.893606][T11452] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 122.901578][T11452] [ 122.903893][T11452] Uninit was created at: [ 122.908132][T11452] kmsan_internal_poison_shadow+0x66/0xd0 [ 122.913969][T11452] kmsan_slab_alloc+0x8a/0xe0 [ 122.919682][T11452] __kmalloc_node_track_caller+0xb40/0x1200 [ 122.925569][T11452] __alloc_skb+0x2fd/0xac0 [ 122.929974][T11452] netlink_sendmsg+0x7d3/0x14d0 [ 122.934823][T11452] ____sys_sendmsg+0x12b6/0x1350 [ 122.939753][T11452] __sys_sendmsg+0x451/0x5f0 [ 122.944438][T11452] __se_sys_sendmsg+0x97/0xb0 [ 122.949105][T11452] __x64_sys_sendmsg+0x4a/0x70 [ 122.953859][T11452] do_syscall_64+0xb8/0x160 [ 122.958355][T11452] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 122.964312][T11452] ===================================================== [ 122.971313][T11452] Disabling lock debugging due to kernel taint [ 122.977443][T11452] Kernel panic - not syncing: panic_on_warn set ... [ 122.984066][T11452] CPU: 1 PID: 11452 Comm: syz-executor223 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 122.994294][T11452] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.004440][T11452] Call Trace: [ 123.007731][T11452] dump_stack+0x1c9/0x220 [ 123.012076][T11452] panic+0x3d5/0xc3e [ 123.015990][T11452] kmsan_report+0x1df/0x1e0 [ 123.020483][T11452] __msan_warning+0x58/0xa0 [ 123.025007][T11452] ethnl_update_bitset32+0x2c85/0x3860 [ 123.030471][T11452] ? kmsan_get_metadata+0x11d/0x180 [ 123.035668][T11452] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 123.041818][T11452] ? kmsan_memcpy_metadata+0xb/0x10 [ 123.047008][T11452] ? __msan_memcpy+0x43/0x50 [ 123.051628][T11452] ethnl_update_bitset+0x11c/0x130 [ 123.056749][T11452] ethnl_set_linkmodes+0x9f9/0x1430 [ 123.061960][T11452] ? kmsan_get_metadata+0x11d/0x180 [ 123.067435][T11452] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.073236][T11452] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 123.078600][T11452] genl_rcv_msg+0x205e/0x2460 [ 123.083320][T11452] netlink_rcv_skb+0x451/0x650 [ 123.088080][T11452] ? genl_unbind+0x380/0x380 [ 123.092659][T11452] genl_rcv+0x63/0x80 [ 123.096626][T11452] netlink_unicast+0xf9e/0x1100 [ 123.101510][T11452] ? genl_pernet_exit+0x90/0x90 [ 123.106368][T11452] netlink_sendmsg+0x1246/0x14d0 [ 123.111314][T11452] ? netlink_getsockopt+0x1440/0x1440 [ 123.116681][T11452] ____sys_sendmsg+0x12b6/0x1350 [ 123.121632][T11452] __sys_sendmsg+0x451/0x5f0 [ 123.126389][T11452] ? __fpregs_load_activate+0x38c/0x3c0 [ 123.131927][T11452] ? kmsan_get_metadata+0x11d/0x180 [ 123.137127][T11452] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.142922][T11452] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.148989][T11452] ? prepare_exit_to_usermode+0x1ca/0x520 [ 123.154700][T11452] __se_sys_sendmsg+0x97/0xb0 [ 123.159434][T11452] __x64_sys_sendmsg+0x4a/0x70 [ 123.164206][T11452] do_syscall_64+0xb8/0x160 [ 123.168705][T11452] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.174579][T11452] RIP: 0033:0x445239 [ 123.178460][T11452] 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 [ 123.198056][T11452] RSP: 002b:00007ffc0bbed6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.206458][T11452] RAX: ffffffffffffffda RBX: 00007ffc0bbed6d0 RCX: 0000000000445239 [ 123.214411][T11452] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 123.222375][T11452] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 123.230334][T11452] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 123.238310][T11452] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 123.247602][T11452] Kernel Offset: 0x26000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 123.259350][T11452] Rebooting in 86400 seconds..