================================================================== BUG: KASAN: use-after-free in rxrpc_send_keepalive+0xe2/0x3c0 net/rxrpc/output.c:634 Read of size 8 at addr ffff888091bff018 by task kworker/0:2/2942 CPU: 0 PID: 2942 Comm: kworker/0:2 Not tainted 5.4.0-rc3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krxrpcd rxrpc_peer_keepalive_worker Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113 print_address_description+0x75/0x5c0 mm/kasan/report.c:374 __kasan_report+0x14b/0x1c0 mm/kasan/report.c:506 kasan_report+0x26/0x50 mm/kasan/common.c:634 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 rxrpc_send_keepalive+0xe2/0x3c0 net/rxrpc/output.c:634 rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:369 [inline] rxrpc_peer_keepalive_worker+0x76e/0xb40 net/rxrpc/peer_event.c:430 process_one_work+0x7ef/0x10e0 kernel/workqueue.c:2269 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 8996: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:510 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524 __do_kmalloc_node mm/slab.c:3615 [inline] __kmalloc_node_track_caller+0x4d/0x60 mm/slab.c:3629 __kmalloc_reserve net/core/skbuff.c:141 [inline] __alloc_skb+0xe8/0x500 net/core/skbuff.c:209 alloc_skb include/linux/skbuff.h:1049 [inline] nlmsg_new include/net/netlink.h:888 [inline] xfrm_send_acquire+0xf9/0x1030 net/xfrm/xfrm_user.c:2965 km_query+0xef/0x1c0 net/xfrm/xfrm_state.c:2164 xfrm_state_find+0x2b5d/0x4570 net/xfrm/xfrm_state.c:1131 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2391 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2436 [inline] xfrm_resolve_and_create_bundle+0x6a6/0x2d40 net/xfrm/xfrm_policy.c:2727 xfrm_lookup_with_ifid+0x27c/0x2310 net/xfrm/xfrm_policy.c:3050 xfrm_lookup net/xfrm/xfrm_policy.c:3174 [inline] xfrm_lookup_route+0x3b/0x190 net/xfrm/xfrm_policy.c:3185 ip6_dst_lookup_flow+0x12e/0x160 net/ipv6/ip6_output.c:1156 rawv6_sendmsg+0x11e1/0x3cd0 net/ipv6/raw.c:928 inet_sendmsg+0x147/0x310 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg net/socket.c:657 [inline] ___sys_sendmsg+0x60d/0x910 net/socket.c:2311 __sys_sendmmsg+0x239/0x470 net/socket.c:2413 __do_sys_sendmmsg net/socket.c:2442 [inline] __se_sys_sendmmsg net/socket.c:2439 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2439 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x12a/0x1e0 mm/kasan/common.c:471 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480 __cache_free mm/slab.c:3425 [inline] kfree+0x115/0x200 mm/slab.c:3756 skb_free_head net/core/skbuff.c:591 [inline] skb_release_data+0x5bd/0x700 net/core/skbuff.c:611 skb_release_all net/core/skbuff.c:665 [inline] __kfree_skb+0x59/0x170 net/core/skbuff.c:679 kfree_skb net/core/skbuff.c:697 [inline] skb_queue_purge+0x18a/0x240 net/core/skbuff.c:3078 netlink_sock_destruct+0xda/0x250 net/netlink/af_netlink.c:394 __sk_destruct+0x54/0x620 net/core/sock.c:1695 sk_destruct net/core/sock.c:1739 [inline] __sk_free+0x35d/0x430 net/core/sock.c:1750 sk_free+0x2a/0x40 net/core/sock.c:1761 deferred_put_nlk_sk+0x1d1/0x200 net/netlink/af_netlink.c:729 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2157 [inline] rcu_core+0x843/0x1050 kernel/rcu/tree.c:2377 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2386 __do_softirq+0x333/0x7c4 arch/x86/include/asm/paravirt.h:766 The buggy address belongs to the object at ffff888091bff000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 24 bytes inside of 1024-byte region [ffff888091bff000, ffff888091bff400) The buggy address belongs to the page: page:ffffea000246ffc0 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea00026ec808 ffffea0002510a08 ffff8880aa400c40 raw: 0000000000000000 ffff888091bff000 0000000100000002 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888091bfef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888091bfef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888091bff000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888091bff080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888091bff100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================