[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 106.990823][ T33] audit: type=1800 audit(1583770164.044:25): pid=11286 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 107.015339][ T33] audit: type=1800 audit(1583770164.074:26): pid=11286 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 107.053171][ T33] audit: type=1800 audit(1583770164.094:27): pid=11286 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 '10.128.0.239' (ECDSA) to the list of known hosts. syzkaller login: [ 120.129826][T11440] IPVS: ftp: loaded support on port[0] = 21 [ 120.139202][T11446] IPVS: ftp: loaded support on port[0] = 21 [ 120.163080][T11443] IPVS: ftp: loaded support on port[0] = 21 [ 120.168887][T11447] IPVS: ftp: loaded support on port[0] = 21 [ 120.194642][T11449] IPVS: ftp: loaded support on port[0] = 21 [ 120.199510][T11448] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program [ 120.499334][T11450] ===================================================== [ 120.506406][T11450] BUG: KMSAN: uninit-value in tcf_exts_change+0xc9/0xf0 [ 120.513578][T11450] CPU: 1 PID: 11450 Comm: syz-executor413 Not tainted 5.6.0-rc2-syzkaller #0 [ 120.522345][T11450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.532390][T11450] Call Trace: [ 120.535872][T11450] dump_stack+0x1c9/0x220 [ 120.540215][T11450] kmsan_report+0xf7/0x1e0 [ 120.544643][T11450] __msan_warning+0x58/0xa0 [ 120.549358][T11450] tcf_exts_change+0xc9/0xf0 [ 120.554056][T11450] tcindex_change+0x2fe4/0x4130 [ 120.558924][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.564275][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.569492][T11450] ? tcindex_get+0x520/0x520 [ 120.574100][T11450] tc_new_tfilter+0x31a8/0x4f40 [ 120.578986][T11450] ? security_capable+0x1cb/0x220 [ 120.584633][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.589848][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.595652][T11450] ? tcf_tunnel_encap_put_tunnel+0x40/0x40 [ 120.601659][T11450] rtnetlink_rcv_msg+0xcb7/0x1570 [ 120.606700][T11450] ? do_syscall_64+0xb8/0x160 [ 120.611503][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.617299][T11450] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 120.623451][T11450] ? __queue_work+0x19f7/0x1d40 [ 120.628302][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.633487][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 120.638586][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.644481][T11450] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 120.650566][T11450] ? rhashtable_jhash2+0x3ac/0x4d0 [ 120.655808][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.661009][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 120.666120][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 120.671481][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 120.676938][T11450] ? kmsan_set_origin_checked+0x95/0xf0 [ 120.682653][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.687880][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.693742][T11450] netlink_rcv_skb+0x451/0x650 [ 120.698524][T11450] ? rtnetlink_bind+0x120/0x120 [ 120.703416][T11450] rtnetlink_rcv+0x50/0x60 [ 120.707838][T11450] netlink_unicast+0xf9e/0x1100 [ 120.712785][T11450] ? rtnetlink_net_exit+0x90/0x90 [ 120.717809][T11450] netlink_sendmsg+0x1246/0x14d0 [ 120.722776][T11450] ? netlink_getsockopt+0x1440/0x1440 [ 120.728403][T11450] ____sys_sendmsg+0x12b6/0x1350 [ 120.733345][T11450] __sys_sendmsg+0x451/0x5f0 [ 120.737941][T11450] ? __fpregs_load_activate+0x38c/0x3c0 [ 120.743482][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 120.748684][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.754525][T11450] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 120.760624][T11450] ? prepare_exit_to_usermode+0x1ca/0x520 [ 120.766359][T11450] __se_sys_sendmsg+0x97/0xb0 [ 120.771068][T11450] __x64_sys_sendmsg+0x4a/0x70 [ 120.775848][T11450] do_syscall_64+0xb8/0x160 [ 120.780484][T11450] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.786414][T11450] RIP: 0033:0x441829 [ 120.790297][T11450] Code: e8 2c 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 8b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 120.809941][T11450] RSP: 002b:00007fff944e1698 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 120.818565][T11450] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441829 [ 120.827066][T11450] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 120.835053][T11450] RBP: 00000000004a2b10 R08: 0000000120080522 R09: 0000000120080522 [ 120.843030][T11450] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402640 [ 120.851001][T11450] R13: 00000000004026d0 R14: 0000000000000000 R15: 0000000000000000 [ 120.859050][T11450] [ 120.861374][T11450] Uninit was created at: [ 120.865622][T11450] kmsan_save_stack_with_flags+0x3c/0x90 [ 120.871263][T11450] kmsan_alloc_page+0x12a/0x310 [ 120.876101][T11450] __alloc_pages_nodemask+0x5712/0x5e80 [ 120.881756][T11450] alloc_pages_current+0x67d/0x990 [ 120.886855][T11450] alloc_slab_page+0x111/0x12f0 [ 120.891690][T11450] new_slab+0x2bc/0x1130 [ 120.895928][T11450] ___slab_alloc+0x1533/0x1f30 [ 120.900678][T11450] kmem_cache_alloc_trace+0xb0a/0xd70 [ 120.906042][T11450] tcindex_change+0x5bd/0x4130 [ 120.910803][T11450] tc_new_tfilter+0x31a8/0x4f40 [ 120.915682][T11450] rtnetlink_rcv_msg+0xcb7/0x1570 [ 120.920709][T11450] netlink_rcv_skb+0x451/0x650 [ 120.925461][T11450] rtnetlink_rcv+0x50/0x60 [ 120.929870][T11450] netlink_unicast+0xf9e/0x1100 [ 120.934728][T11450] netlink_sendmsg+0x1246/0x14d0 [ 120.939657][T11450] ____sys_sendmsg+0x12b6/0x1350 [ 120.944590][T11450] __sys_sendmsg+0x451/0x5f0 [ 120.949163][T11450] __se_sys_sendmsg+0x97/0xb0 [ 120.953848][T11450] __x64_sys_sendmsg+0x4a/0x70 [ 120.958636][T11450] do_syscall_64+0xb8/0x160 [ 120.963127][T11450] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.969183][T11450] ===================================================== [ 120.976113][T11450] Disabling lock debugging due to kernel taint [ 120.982268][T11450] Kernel panic - not syncing: panic_on_warn set ... [ 120.988846][T11450] CPU: 1 PID: 11450 Comm: syz-executor413 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 120.998983][T11450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.009028][T11450] Call Trace: [ 121.012333][T11450] dump_stack+0x1c9/0x220 [ 121.016657][T11450] panic+0x3d5/0xc3e [ 121.020574][T11450] kmsan_report+0x1df/0x1e0 [ 121.025099][T11450] __msan_warning+0x58/0xa0 [ 121.029604][T11450] tcf_exts_change+0xc9/0xf0 [ 121.034213][T11450] tcindex_change+0x2fe4/0x4130 [ 121.039098][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.044395][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.049595][T11450] ? tcindex_get+0x520/0x520 [ 121.054190][T11450] tc_new_tfilter+0x31a8/0x4f40 [ 121.059075][T11450] ? security_capable+0x1cb/0x220 [ 121.064087][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.069299][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.075098][T11450] ? tcf_tunnel_encap_put_tunnel+0x40/0x40 [ 121.080895][T11450] rtnetlink_rcv_msg+0xcb7/0x1570 [ 121.085946][T11450] ? do_syscall_64+0xb8/0x160 [ 121.090649][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.096480][T11450] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 121.102643][T11450] ? __queue_work+0x19f7/0x1d40 [ 121.107497][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.112819][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 121.118033][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.123863][T11450] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 121.129933][T11450] ? rhashtable_jhash2+0x3ac/0x4d0 [ 121.135060][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.140255][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 121.145458][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 121.150588][T11450] ? kmsan_get_metadata+0x4f/0x180 [ 121.155732][T11450] ? kmsan_set_origin_checked+0x95/0xf0 [ 121.161279][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.166475][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.172291][T11450] netlink_rcv_skb+0x451/0x650 [ 121.177069][T11450] ? rtnetlink_bind+0x120/0x120 [ 121.181938][T11450] rtnetlink_rcv+0x50/0x60 [ 121.186393][T11450] netlink_unicast+0xf9e/0x1100 [ 121.191245][T11450] ? rtnetlink_net_exit+0x90/0x90 [ 121.196277][T11450] netlink_sendmsg+0x1246/0x14d0 [ 121.201224][T11450] ? netlink_getsockopt+0x1440/0x1440 [ 121.206588][T11450] ____sys_sendmsg+0x12b6/0x1350 [ 121.211556][T11450] __sys_sendmsg+0x451/0x5f0 [ 121.216226][T11450] ? __fpregs_load_activate+0x38c/0x3c0 [ 121.221789][T11450] ? kmsan_get_metadata+0x11d/0x180 [ 121.227145][T11450] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 121.232947][T11450] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 121.239045][T11450] ? prepare_exit_to_usermode+0x1ca/0x520 [ 121.244784][T11450] __se_sys_sendmsg+0x97/0xb0 [ 121.249631][T11450] __x64_sys_sendmsg+0x4a/0x70 [ 121.254520][T11450] do_syscall_64+0xb8/0x160 [ 121.259262][T11450] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.265284][T11450] RIP: 0033:0x441829 [ 121.269177][T11450] Code: e8 2c 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 8b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 121.288977][T11450] RSP: 002b:00007fff944e1698 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 121.297408][T11450] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441829 [ 121.305376][T11450] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 121.313345][T11450] RBP: 00000000004a2b10 R08: 0000000120080522 R09: 0000000120080522 [ 121.321323][T11450] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402640 [ 121.329291][T11450] R13: 00000000004026d0 R14: 0000000000000000 R15: 0000000000000000 [ 121.338847][T11450] Kernel Offset: 0x21c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 121.350639][T11450] Rebooting in 86400 seconds..