[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 108.604943][ T32] audit: type=1800 audit(1583060860.653:25): pid=11340 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 108.643646][ T32] audit: type=1800 audit(1583060860.673:26): pid=11340 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 108.664759][ T32] audit: type=1800 audit(1583060860.683:27): pid=11340 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 '10.128.0.226' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 122.814246][T11492] IPVS: ftp: loaded support on port[0] = 21 [ 122.874655][T11492] ===================================================== [ 122.881684][T11492] BUG: KMSAN: uninit-value in ethnl_update_bitset32+0x2c85/0x3860 [ 122.889490][T11492] CPU: 1 PID: 11492 Comm: syz-executor048 Not tainted 5.6.0-rc2-syzkaller #0 [ 122.898578][T11492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 122.908732][T11492] Call Trace: [ 122.912017][T11492] dump_stack+0x1c9/0x220 [ 122.916348][T11492] kmsan_report+0xf7/0x1e0 [ 122.920778][T11492] __msan_warning+0x58/0xa0 [ 122.925279][T11492] ethnl_update_bitset32+0x2c85/0x3860 [ 122.930762][T11492] ? kmsan_get_metadata+0x11d/0x180 [ 122.935960][T11492] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 122.942109][T11492] ? kmsan_memcpy_metadata+0xb/0x10 [ 122.947298][T11492] ? __msan_memcpy+0x43/0x50 [ 122.951873][T11492] ethnl_update_bitset+0x11c/0x130 [ 122.956986][T11492] ethnl_set_linkmodes+0x9f9/0x1430 [ 122.962292][T11492] ? kmsan_get_metadata+0x11d/0x180 [ 122.967555][T11492] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 122.973465][T11492] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 122.978937][T11492] genl_rcv_msg+0x205e/0x2460 [ 122.983622][T11492] netlink_rcv_skb+0x451/0x650 [ 122.988414][T11492] ? genl_unbind+0x380/0x380 [ 122.993053][T11492] genl_rcv+0x63/0x80 [ 122.997042][T11492] netlink_unicast+0xf9e/0x1100 [ 123.001890][T11492] ? genl_pernet_exit+0x90/0x90 [ 123.006829][T11492] netlink_sendmsg+0x1246/0x14d0 [ 123.011804][T11492] ? netlink_getsockopt+0x1440/0x1440 [ 123.017169][T11492] ____sys_sendmsg+0x12b6/0x1350 [ 123.022123][T11492] __sys_sendmsg+0x451/0x5f0 [ 123.026720][T11492] ? __fpregs_load_activate+0x38c/0x3c0 [ 123.032272][T11492] ? kmsan_get_metadata+0x11d/0x180 [ 123.037465][T11492] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.043264][T11492] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.049316][T11492] ? prepare_exit_to_usermode+0x1ca/0x520 [ 123.055036][T11492] __se_sys_sendmsg+0x97/0xb0 [ 123.059866][T11492] __x64_sys_sendmsg+0x4a/0x70 [ 123.064632][T11492] do_syscall_64+0xb8/0x160 [ 123.069177][T11492] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.075088][T11492] RIP: 0033:0x445249 [ 123.078980][T11492] 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 [ 123.098578][T11492] RSP: 002b:00007ffc640b5418 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.106985][T11492] RAX: ffffffffffffffda RBX: 00007ffc640b5430 RCX: 0000000000445249 [ 123.114953][T11492] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 123.123019][T11492] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 123.131232][T11492] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 123.139456][T11492] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 123.147430][T11492] [ 123.149810][T11492] Uninit was created at: [ 123.154049][T11492] kmsan_internal_poison_shadow+0x66/0xd0 [ 123.159755][T11492] kmsan_slab_alloc+0x8a/0xe0 [ 123.164564][T11492] __kmalloc_node_track_caller+0xb40/0x1200 [ 123.170465][T11492] __alloc_skb+0x2fd/0xac0 [ 123.175039][T11492] netlink_sendmsg+0x7d3/0x14d0 [ 123.180439][T11492] ____sys_sendmsg+0x12b6/0x1350 [ 123.185471][T11492] __sys_sendmsg+0x451/0x5f0 [ 123.190049][T11492] __se_sys_sendmsg+0x97/0xb0 [ 123.194708][T11492] __x64_sys_sendmsg+0x4a/0x70 [ 123.199479][T11492] do_syscall_64+0xb8/0x160 [ 123.203999][T11492] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.209876][T11492] ===================================================== [ 123.216883][T11492] Disabling lock debugging due to kernel taint [ 123.223025][T11492] Kernel panic - not syncing: panic_on_warn set ... [ 123.229608][T11492] CPU: 1 PID: 11492 Comm: syz-executor048 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 123.239743][T11492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.249965][T11492] Call Trace: [ 123.253257][T11492] dump_stack+0x1c9/0x220 [ 123.257606][T11492] panic+0x3d5/0xc3e [ 123.261516][T11492] kmsan_report+0x1df/0x1e0 [ 123.266038][T11492] __msan_warning+0x58/0xa0 [ 123.270752][T11492] ethnl_update_bitset32+0x2c85/0x3860 [ 123.276221][T11492] ? kmsan_get_metadata+0x11d/0x180 [ 123.281424][T11492] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 123.287665][T11492] ? kmsan_memcpy_metadata+0xb/0x10 [ 123.292967][T11492] ? __msan_memcpy+0x43/0x50 [ 123.297568][T11492] ethnl_update_bitset+0x11c/0x130 [ 123.302681][T11492] ethnl_set_linkmodes+0x9f9/0x1430 [ 123.307901][T11492] ? kmsan_get_metadata+0x11d/0x180 [ 123.313443][T11492] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.319246][T11492] ? linkmodes_fill_reply+0x5c0/0x5c0 [ 123.324609][T11492] genl_rcv_msg+0x205e/0x2460 [ 123.329734][T11492] netlink_rcv_skb+0x451/0x650 [ 123.334503][T11492] ? genl_unbind+0x380/0x380 [ 123.339094][T11492] genl_rcv+0x63/0x80 [ 123.343063][T11492] netlink_unicast+0xf9e/0x1100 [ 123.347900][T11492] ? genl_pernet_exit+0x90/0x90 [ 123.352748][T11492] netlink_sendmsg+0x1246/0x14d0 [ 123.357754][T11492] ? netlink_getsockopt+0x1440/0x1440 [ 123.363167][T11492] ____sys_sendmsg+0x12b6/0x1350 [ 123.368210][T11492] __sys_sendmsg+0x451/0x5f0 [ 123.372903][T11492] ? __fpregs_load_activate+0x38c/0x3c0 [ 123.378433][T11492] ? kmsan_get_metadata+0x11d/0x180 [ 123.383677][T11492] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 123.389483][T11492] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 123.396502][T11492] ? prepare_exit_to_usermode+0x1ca/0x520 [ 123.402226][T11492] __se_sys_sendmsg+0x97/0xb0 [ 123.406927][T11492] __x64_sys_sendmsg+0x4a/0x70 [ 123.411698][T11492] do_syscall_64+0xb8/0x160 [ 123.416197][T11492] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.422253][T11492] RIP: 0033:0x445249 [ 123.426363][T11492] 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 [ 123.447264][T11492] RSP: 002b:00007ffc640b5418 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 123.455803][T11492] RAX: ffffffffffffffda RBX: 00007ffc640b5430 RCX: 0000000000445249 [ 123.463771][T11492] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 123.471740][T11492] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 123.479805][T11492] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 123.487892][T11492] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 123.497593][T11492] Kernel Offset: 0x17c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 123.509240][T11492] Rebooting in 86400 seconds..