==================================================================
BUG: KCSAN: data-race in af_alg_sendmsg / af_alg_wait_for_data

write to 0xffff88811e84d4c8 of 8 bytes by task 16686 on cpu 0:
 af_alg_sendmsg+0xa46/0xc60 crypto/af_alg.c:928
 skcipher_sendmsg+0x71/0x80 crypto/algif_skcipher.c:47
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0x360/0x4d0 net/socket.c:2352
 ___sys_sendmsg net/socket.c:2406 [inline]
 __sys_sendmsg+0x1df/0x260 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x42/0x50 net/socket.c:2446
 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88811e84d4c8 of 8 bytes by task 16672 on cpu 1:
 af_alg_wait_for_data+0x133/0x270 crypto/af_alg.c:757
 _skcipher_recvmsg crypto/algif_skcipher.c:65 [inline]
 skcipher_recvmsg+0x1cc/0x7d0 crypto/algif_skcipher.c:157
 sock_recvmsg_nosec net/socket.c:886 [inline]
 sock_recvmsg net/socket.c:904 [inline]
 __sys_recvfrom+0x1cb/0x290 net/socket.c:2052
 __do_sys_recvfrom net/socket.c:2070 [inline]
 __se_sys_recvfrom net/socket.c:2066 [inline]
 __x64_sys_recvfrom+0x74/0x90 net/socket.c:2066
 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16672 Comm: syz-executor.2 Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================