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| author | rwatson <rwatson@FreeBSD.org> | 2004-06-20 21:43:13 +0000 |
|---|---|---|
| committer | rwatson <rwatson@FreeBSD.org> | 2004-06-20 21:43:13 +0000 |
| commit | ffabeb722910b0f8175a5d9e4005595590359ddc (patch) | |
| tree | 56c66730ab5673379fad41e0d5044e11c5a63817 | |
| parent | af61e62dc913d0f8eb946f7223576ae4d3fdd550 (diff) | |
| download | FreeBSD-src-ffabeb722910b0f8175a5d9e4005595590359ddc.zip FreeBSD-src-ffabeb722910b0f8175a5d9e4005595590359ddc.tar.gz | |
In uipc_rcvd(), lock the socket buffers at either end of the UNIX
domain sokcet when updating fields at both ends.
Submitted by: sam
Sponsored by: FreeBSD Foundation
| -rw-r--r-- | sys/kern/uipc_usrreq.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c index 6de52dd..a5abcee 100644 --- a/sys/kern/uipc_usrreq.c +++ b/sys/kern/uipc_usrreq.c @@ -280,6 +280,8 @@ uipc_rcvd(struct socket *so, int flags) if (unp->unp_conn == NULL) break; so2 = unp->unp_conn->unp_socket; + SOCKBUF_LOCK(&so2->so_snd); + SOCKBUF_LOCK(&so->so_rcv); /* * Adjust backpressure on sender * and wakeup any waiting to write. @@ -291,6 +293,8 @@ uipc_rcvd(struct socket *so, int flags) (void)chgsbsize(so2->so_cred->cr_uidinfo, &so2->so_snd.sb_hiwat, newhiwat, RLIM_INFINITY); unp->unp_cc = so->so_rcv.sb_cc; + SOCKBUF_UNLOCK(&so->so_rcv); + SOCKBUF_UNLOCK(&so2->so_snd); sowwakeup(so2); break; |
