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libc clnt_com_create: relock rpcsoc_lock earlier when port is obtained from portmapper

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Otherwise on mapper failure we goto error handler which expect
rpscoc_lock owned, but we do not.

PR:	261051
Reported by:	RyanCai <ryancaicse@gmail.com>
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2022-01-09 07:09:22 +02:00
parent e200809190
commit 6d06bc688e
1 changed files with 1 additions and 1 deletions
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2
lib/libc/rpc/rpc_soc.c
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@ -120,11 +120,11 @@ clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers, int *
proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
proto);
mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */
if (sport == 0) {
goto err;
}
raddr->sin_port = htons(sport);
mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */
}
/* Transform sockaddr_in to netbuf */