[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.967784][ T23] audit: type=1800 audit(1579631456.513:25): pid=9363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 80.988140][ T23] audit: type=1800 audit(1579631456.513:26): pid=9363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.039205][ T23] audit: type=1800 audit(1579631456.513:27): pid=9363 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 '10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.644387][ T9517] ================================================================== [ 91.652566][ T9517] BUG: KASAN: slab-out-of-bounds in setup_udp_tunnel_sock+0x43d/0x520 [ 91.660733][ T9517] Write of size 1 at addr ffff8880a4ecc590 by task syz-executor214/9517 [ 91.669059][ T9517] [ 91.671371][ T9517] CPU: 1 PID: 9517 Comm: syz-executor214 Not tainted 5.5.0-rc7-syzkaller #0 [ 91.680051][ T9517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.690089][ T9517] Call Trace: [ 91.693369][ T9517] dump_stack+0x197/0x210 [ 91.697687][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 91.703133][ T9517] print_address_description.constprop.0.cold+0xd4/0x30b [ 91.710139][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 91.715577][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 91.721015][ T9517] __kasan_report.cold+0x1b/0x41 [ 91.725931][ T9517] ? trace_hardirqs_on+0x51/0x240 [ 91.730931][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 91.736369][ T9517] kasan_report+0x12/0x20 [ 91.740935][ T9517] __asan_report_store1_noabort+0x17/0x20 [ 91.746773][ T9517] setup_udp_tunnel_sock+0x43d/0x520 [ 91.752039][ T9517] gtp_encap_enable_socket+0x338/0x420 [ 91.757488][ T9517] ? gtp_find_pdp_by_link+0x480/0x480 [ 91.762952][ T9517] ? memset+0x32/0x40 [ 91.766928][ T9517] ? gtp1_pdp_find.isra.0+0x180/0x180 [ 91.772294][ T9517] ? __gtp_encap_destroy+0x1e0/0x1e0 [ 91.777581][ T9517] ? alloc_netdev_mqs+0xa22/0xde0 [ 91.782598][ T9517] gtp_newlink+0x95/0xc60 [ 91.786914][ T9517] ? rtnl_create_link+0x192/0xab0 [ 91.791921][ T9517] ? netlink_ns_capable+0x26/0x30 [ 91.796929][ T9517] ? gtp_genl_get_pdp+0x5c0/0x5c0 [ 91.801937][ T9517] __rtnl_newlink+0x109e/0x1790 [ 91.806814][ T9517] ? rtnl_link_unregister+0x250/0x250 [ 91.812170][ T9517] ? is_bpf_text_address+0xce/0x160 [ 91.817348][ T9517] ? kernel_text_address+0x73/0xf0 [ 91.822437][ T9517] ? unwind_get_return_address+0x61/0xa0 [ 91.828175][ T9517] ? profile_setup.cold+0xbb/0xbb [ 91.833192][ T9517] ? arch_stack_walk+0x97/0xf0 [ 91.837950][ T9517] ? stack_trace_save+0xac/0xe0 [ 91.842780][ T9517] ? stack_trace_consume_entry+0x190/0x190 [ 91.848574][ T9517] ? mark_lock+0xc2/0x1220 [ 91.852982][ T9517] ? save_stack+0x5c/0x90 [ 91.857294][ T9517] ? save_stack+0x23/0x90 [ 91.861614][ T9517] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 91.867398][ T9517] ? kasan_kmalloc+0x9/0x10 [ 91.871912][ T9517] ? kmem_cache_alloc_trace+0x158/0x790 [ 91.877460][ T9517] ? rtnl_newlink+0x4b/0xa0 [ 91.881950][ T9517] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 91.887469][ T9517] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 91.893436][ T9517] rtnl_newlink+0x69/0xa0 [ 91.897742][ T9517] ? __rtnl_newlink+0x1790/0x1790 [ 91.902766][ T9517] rtnetlink_rcv_msg+0x45e/0xaf0 [ 91.907699][ T9517] ? rtnl_bridge_getlink+0x910/0x910 [ 91.912979][ T9517] ? lock_downgrade+0x920/0x920 [ 91.917812][ T9517] ? netlink_deliver_tap+0x228/0xbe0 [ 91.923071][ T9517] ? find_held_lock+0x35/0x130 [ 91.927815][ T9517] netlink_rcv_skb+0x177/0x450 [ 91.932554][ T9517] ? rtnl_bridge_getlink+0x910/0x910 [ 91.937816][ T9517] ? netlink_ack+0xb50/0xb50 [ 91.942386][ T9517] ? __kasan_check_read+0x11/0x20 [ 91.947392][ T9517] ? netlink_deliver_tap+0x24a/0xbe0 [ 91.952678][ T9517] rtnetlink_rcv+0x1d/0x30 [ 91.957072][ T9517] netlink_unicast+0x58c/0x7d0 [ 91.961818][ T9517] ? netlink_attachskb+0x870/0x870 [ 91.966909][ T9517] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 91.972614][ T9517] ? __check_object_size+0x3d/0x437 [ 91.977791][ T9517] netlink_sendmsg+0x91c/0xea0 [ 91.982533][ T9517] ? netlink_unicast+0x7d0/0x7d0 [ 91.987448][ T9517] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 91.992969][ T9517] ? apparmor_socket_sendmsg+0x2a/0x30 [ 91.998403][ T9517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.004634][ T9517] ? security_socket_sendmsg+0x8d/0xc0 [ 92.010071][ T9517] ? netlink_unicast+0x7d0/0x7d0 [ 92.014981][ T9517] sock_sendmsg+0xd7/0x130 [ 92.019376][ T9517] ____sys_sendmsg+0x753/0x880 [ 92.024114][ T9517] ? kernel_sendmsg+0x50/0x50 [ 92.028770][ T9517] ? mark_held_locks+0xa4/0xf0 [ 92.033608][ T9517] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 92.039657][ T9517] ? __handle_mm_fault+0x3145/0x3cc0 [ 92.044916][ T9517] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 92.050963][ T9517] ___sys_sendmsg+0x100/0x170 [ 92.055615][ T9517] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 92.061571][ T9517] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.066665][ T9517] ? __do_page_fault+0x56a/0xd80 [ 92.071577][ T9517] ? find_held_lock+0x35/0x130 [ 92.076332][ T9517] ? __do_page_fault+0x56a/0xd80 [ 92.081253][ T9517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.087487][ T9517] ? __fget_light+0x1a9/0x230 [ 92.092146][ T9517] ? __fdget+0x1b/0x20 [ 92.096205][ T9517] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.102439][ T9517] __sys_sendmsg+0x105/0x1d0 [ 92.107018][ T9517] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.112129][ T9517] ? down_read_non_owner+0x490/0x490 [ 92.117406][ T9517] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.122841][ T9517] ? do_syscall_64+0x26/0x790 [ 92.127492][ T9517] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.133532][ T9517] ? do_syscall_64+0x26/0x790 [ 92.138199][ T9517] __x64_sys_sendmsg+0x78/0xb0 [ 92.142939][ T9517] do_syscall_64+0xfa/0x790 [ 92.147451][ T9517] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.153319][ T9517] RIP: 0033:0x4402b9 [ 92.157208][ T9517] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 92.176798][ T9517] RSP: 002b:00007ffc7d7ecb98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 92.185186][ T9517] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 92.193133][ T9517] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 92.201091][ T9517] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 92.209048][ T9517] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b40 [ 92.217004][ T9517] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 92.224963][ T9517] [ 92.227270][ T9517] Allocated by task 9517: [ 92.231579][ T9517] save_stack+0x23/0x90 [ 92.235706][ T9517] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 92.241313][ T9517] kasan_slab_alloc+0xf/0x20 [ 92.245875][ T9517] kmem_cache_alloc+0x121/0x710 [ 92.250700][ T9517] sk_prot_alloc+0x67/0x310 [ 92.255257][ T9517] sk_alloc+0x39/0xfd0 [ 92.259310][ T9517] inet_create+0x363/0xdf0 [ 92.263706][ T9517] __sock_create+0x3ce/0x730 [ 92.268271][ T9517] __sys_socket+0x103/0x220 [ 92.272749][ T9517] __x64_sys_socket+0x73/0xb0 [ 92.277413][ T9517] do_syscall_64+0xfa/0x790 [ 92.281900][ T9517] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.287790][ T9517] [ 92.290097][ T9517] Freed by task 0: [ 92.293786][ T9517] (stack is not available) [ 92.298170][ T9517] [ 92.300477][ T9517] The buggy address belongs to the object at ffff8880a4ecc040 [ 92.300477][ T9517] which belongs to the cache RAW of size 1360 [ 92.313891][ T9517] The buggy address is located 0 bytes to the right of [ 92.313891][ T9517] 1360-byte region [ffff8880a4ecc040, ffff8880a4ecc590) [ 92.327564][ T9517] The buggy address belongs to the page: [ 92.333177][ T9517] page:ffffea000293b300 refcount:1 mapcount:0 mapping:ffff8880a69611c0 index:0x0 compound_mapcount: 0 [ 92.344097][ T9517] raw: 00fffe0000010200 ffff8880a53a1c48 ffff8880a53a1c48 ffff8880a69611c0 [ 92.352654][ T9517] raw: 0000000000000000 ffff8880a4ecc040 0000000100000005 0000000000000000 [ 92.361208][ T9517] page dumped because: kasan: bad access detected [ 92.367589][ T9517] [ 92.369892][ T9517] Memory state around the buggy address: [ 92.375497][ T9517] ffff8880a4ecc480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 92.383662][ T9517] ffff8880a4ecc500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 92.391695][ T9517] >ffff8880a4ecc580: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 92.399841][ T9517] ^ [ 92.404407][ T9517] ffff8880a4ecc600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 92.412449][ T9517] ffff8880a4ecc680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 92.420482][ T9517] ================================================================== [ 92.428533][ T9517] Disabling lock debugging due to kernel taint [ 92.435343][ T9517] Kernel panic - not syncing: panic_on_warn set ... [ 92.441930][ T9517] CPU: 1 PID: 9517 Comm: syz-executor214 Tainted: G B 5.5.0-rc7-syzkaller #0 [ 92.451969][ T9517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.462085][ T9517] Call Trace: [ 92.465352][ T9517] dump_stack+0x197/0x210 [ 92.469662][ T9517] panic+0x2e3/0x75c [ 92.473534][ T9517] ? add_taint.cold+0x16/0x16 [ 92.478189][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 92.483621][ T9517] ? preempt_schedule+0x4b/0x60 [ 92.488447][ T9517] ? ___preempt_schedule+0x16/0x18 [ 92.493547][ T9517] ? trace_hardirqs_on+0x5e/0x240 [ 92.498555][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 92.503986][ T9517] end_report+0x47/0x4f [ 92.508116][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 92.513548][ T9517] __kasan_report.cold+0xe/0x41 [ 92.518371][ T9517] ? trace_hardirqs_on+0x51/0x240 [ 92.523367][ T9517] ? setup_udp_tunnel_sock+0x43d/0x520 [ 92.528798][ T9517] kasan_report+0x12/0x20 [ 92.533105][ T9517] __asan_report_store1_noabort+0x17/0x20 [ 92.538802][ T9517] setup_udp_tunnel_sock+0x43d/0x520 [ 92.544065][ T9517] gtp_encap_enable_socket+0x338/0x420 [ 92.549505][ T9517] ? gtp_find_pdp_by_link+0x480/0x480 [ 92.554856][ T9517] ? memset+0x32/0x40 [ 92.558834][ T9517] ? gtp1_pdp_find.isra.0+0x180/0x180 [ 92.564195][ T9517] ? __gtp_encap_destroy+0x1e0/0x1e0 [ 92.569460][ T9517] ? alloc_netdev_mqs+0xa22/0xde0 [ 92.574471][ T9517] gtp_newlink+0x95/0xc60 [ 92.578781][ T9517] ? rtnl_create_link+0x192/0xab0 [ 92.583776][ T9517] ? netlink_ns_capable+0x26/0x30 [ 92.588777][ T9517] ? gtp_genl_get_pdp+0x5c0/0x5c0 [ 92.593775][ T9517] __rtnl_newlink+0x109e/0x1790 [ 92.598607][ T9517] ? rtnl_link_unregister+0x250/0x250 [ 92.603953][ T9517] ? is_bpf_text_address+0xce/0x160 [ 92.609126][ T9517] ? kernel_text_address+0x73/0xf0 [ 92.614232][ T9517] ? unwind_get_return_address+0x61/0xa0 [ 92.619854][ T9517] ? profile_setup.cold+0xbb/0xbb [ 92.624852][ T9517] ? arch_stack_walk+0x97/0xf0 [ 92.629607][ T9517] ? stack_trace_save+0xac/0xe0 [ 92.634482][ T9517] ? stack_trace_consume_entry+0x190/0x190 [ 92.640267][ T9517] ? mark_lock+0xc2/0x1220 [ 92.644662][ T9517] ? save_stack+0x5c/0x90 [ 92.648968][ T9517] ? save_stack+0x23/0x90 [ 92.653291][ T9517] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 92.659196][ T9517] ? kasan_kmalloc+0x9/0x10 [ 92.663673][ T9517] ? kmem_cache_alloc_trace+0x158/0x790 [ 92.669210][ T9517] ? rtnl_newlink+0x4b/0xa0 [ 92.673794][ T9517] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 92.679315][ T9517] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 92.685279][ T9517] rtnl_newlink+0x69/0xa0 [ 92.689585][ T9517] ? __rtnl_newlink+0x1790/0x1790 [ 92.694583][ T9517] rtnetlink_rcv_msg+0x45e/0xaf0 [ 92.699493][ T9517] ? rtnl_bridge_getlink+0x910/0x910 [ 92.704751][ T9517] ? lock_downgrade+0x920/0x920 [ 92.709579][ T9517] ? netlink_deliver_tap+0x228/0xbe0 [ 92.714839][ T9517] ? find_held_lock+0x35/0x130 [ 92.719593][ T9517] netlink_rcv_skb+0x177/0x450 [ 92.724348][ T9517] ? rtnl_bridge_getlink+0x910/0x910 [ 92.729618][ T9517] ? netlink_ack+0xb50/0xb50 [ 92.734191][ T9517] ? __kasan_check_read+0x11/0x20 [ 92.739200][ T9517] ? netlink_deliver_tap+0x24a/0xbe0 [ 92.744478][ T9517] rtnetlink_rcv+0x1d/0x30 [ 92.748878][ T9517] netlink_unicast+0x58c/0x7d0 [ 92.753623][ T9517] ? netlink_attachskb+0x870/0x870 [ 92.758714][ T9517] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 92.764416][ T9517] ? __check_object_size+0x3d/0x437 [ 92.769595][ T9517] netlink_sendmsg+0x91c/0xea0 [ 92.774334][ T9517] ? netlink_unicast+0x7d0/0x7d0 [ 92.779249][ T9517] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 92.784767][ T9517] ? apparmor_socket_sendmsg+0x2a/0x30 [ 92.790204][ T9517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.796433][ T9517] ? security_socket_sendmsg+0x8d/0xc0 [ 92.801870][ T9517] ? netlink_unicast+0x7d0/0x7d0 [ 92.806781][ T9517] sock_sendmsg+0xd7/0x130 [ 92.811173][ T9517] ____sys_sendmsg+0x753/0x880 [ 92.815913][ T9517] ? kernel_sendmsg+0x50/0x50 [ 92.820568][ T9517] ? mark_held_locks+0xa4/0xf0 [ 92.825355][ T9517] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 92.831401][ T9517] ? __handle_mm_fault+0x3145/0x3cc0 [ 92.836660][ T9517] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 92.842717][ T9517] ___sys_sendmsg+0x100/0x170 [ 92.847449][ T9517] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 92.853409][ T9517] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.858500][ T9517] ? __do_page_fault+0x56a/0xd80 [ 92.863414][ T9517] ? find_held_lock+0x35/0x130 [ 92.868156][ T9517] ? __do_page_fault+0x56a/0xd80 [ 92.873075][ T9517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.879293][ T9517] ? __fget_light+0x1a9/0x230 [ 92.883943][ T9517] ? __fdget+0x1b/0x20 [ 92.888020][ T9517] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.894252][ T9517] __sys_sendmsg+0x105/0x1d0 [ 92.898830][ T9517] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.903840][ T9517] ? down_read_non_owner+0x490/0x490 [ 92.909104][ T9517] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.914537][ T9517] ? do_syscall_64+0x26/0x790 [ 92.919193][ T9517] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.925242][ T9517] ? do_syscall_64+0x26/0x790 [ 92.929913][ T9517] __x64_sys_sendmsg+0x78/0xb0 [ 92.934656][ T9517] do_syscall_64+0xfa/0x790 [ 92.939141][ T9517] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.945014][ T9517] RIP: 0033:0x4402b9 [ 92.948888][ T9517] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 92.968469][ T9517] RSP: 002b:00007ffc7d7ecb98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 92.976870][ T9517] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 92.984841][ T9517] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 92.992789][ T9517] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 93.000736][ T9517] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b40 [ 93.008685][ T9517] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 93.017865][ T9517] Kernel Offset: disabled [ 93.022192][ T9517] Rebooting in 86400 seconds..