TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ================================================================== BUG: KASAN: use-after-free in memcpy include/linux/string.h:352 [inline] BUG: KASAN: use-after-free in generic_gcmaes_encrypt+0xc8/0x1a0 arch/x86/crypto/aesni-intel_glue.c:1134 Read of size 12 at addr ffff888097f2cd00 by task kworker/0:4/8061 CPU: 0 PID: 8061 Comm: kworker/0:4 Not tainted 5.0.0-rc3 #36 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: pencrypt padata_parallel_worker Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 memcpy+0x24/0x50 mm/kasan/common.c:130 memcpy include/linux/string.h:352 [inline] generic_gcmaes_encrypt+0xc8/0x1a0 arch/x86/crypto/aesni-intel_glue.c:1134 crypto_aead_encrypt include/crypto/aead.h:336 [inline] gcmaes_wrapper_encrypt+0x15d/0x200 arch/x86/crypto/aesni-intel_glue.c:986 crypto_aead_encrypt include/crypto/aead.h:336 [inline] pcrypt_aead_enc+0xc7/0x190 crypto/pcrypt.c:143 padata_parallel_worker+0x47f/0x7c0 kernel/padata.c:86 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Allocated by task 12781: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3609 kmalloc include/linux/slab.h:545 [inline] tls_set_sw_offload+0xdf7/0x1330 net/tls/tls_sw.c:1971 do_tls_setsockopt_conf net/tls/tls_main.c:469 [inline] do_tls_setsockopt net/tls/tls_main.c:516 [inline] tls_setsockopt+0x687/0x770 net/tls/tls_main.c:535 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2991 __sys_setsockopt+0x1b0/0x3a0 net/socket.c:1902 __do_sys_setsockopt net/socket.c:1913 [inline] __se_sys_setsockopt net/socket.c:1910 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1910 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 12780: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466 __cache_free mm/slab.c:3487 [inline] kfree+0xcf/0x230 mm/slab.c:3806 tls_sk_proto_close+0x612/0x770 net/tls/tls_main.c:279 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:473 __sock_release+0xd3/0x250 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1141 __fput+0x3c5/0xb10 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888097f2cd00 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff888097f2cd00, ffff888097f2cd20) The buggy address belongs to the page: page:ffffea00025fcb00 count:1 mapcount:0 mapping:ffff88812c3f01c0 index:0xffff888097f2cfc1 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea00028fb988 ffffea00023c30c8 ffff88812c3f01c0 raw: ffff888097f2cfc1 ffff888097f2c000 000000010000002b 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888097f2cc00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888097f2cc80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff888097f2cd00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff888097f2cd80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888097f2ce00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================