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Quell false positives in svc_vc_create and svc_vc_create_conn with cd and xprt

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Both cd and xprt will be non-NULL after their respective malloc(9) wrappers are
called (mem_alloc and svc_xprt_alloc, which calls mem_alloc) as mem_alloc
always gets called with M_WAITOK|M_ZERO today. Thus, testing for them being
non-NULL is incorrect -- it misleads Coverity and it misleads the reader.

Remove some unnecessary NULL initializations as a follow up to help solidify
the fact that these pointers will be initialized properly in sys/rpc/.. with
the interfaces the way they are currently.

Differential Revision: https://reviews.freebsd.org/D6572
MFC after: 2 weeks
Reported by: Coverity
CID: 1007338, 1007339, 1007340
Reviewed by: markj, truckman
Sponsored by: EMC / Isilon Storage Division
This commit is contained in:
Enji Cooper 2016-05-27 08:48:33 +00:00
parent 8eeb3e1773
commit 1b53778113
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=300836
1 changed files with 11 additions and 13 deletions
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24
sys/rpc/svc_vc.c
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@ -143,7 +143,7 @@ SVCXPRT *
svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
size_t recvsize)
{
SVCXPRT *xprt = NULL;
SVCXPRT *xprt;
struct sockaddr* sa;
int error;
@ -189,11 +189,11 @@ svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
SOCKBUF_UNLOCK(&so->so_rcv);
return (xprt);
cleanup_svc_vc_create:
if (xprt) {
sx_destroy(&xprt->xp_lock);
svc_xprt_free(xprt);
}
sx_destroy(&xprt->xp_lock);
svc_xprt_free(xprt);
return (NULL);
}
@ -203,8 +203,8 @@ cleanup_svc_vc_create:
SVCXPRT *
svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
{
SVCXPRT *xprt = NULL;
struct cf_conn *cd = NULL;
SVCXPRT *xprt;
struct cf_conn *cd;
struct sockaddr* sa = NULL;
struct sockopt opt;
int one = 1;
@ -279,12 +279,10 @@ svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
return (xprt);
cleanup_svc_vc_create:
if (xprt) {
sx_destroy(&xprt->xp_lock);
svc_xprt_free(xprt);
}
if (cd)
mem_free(cd, sizeof(*cd));
sx_destroy(&xprt->xp_lock);
svc_xprt_free(xprt);
mem_free(cd, sizeof(*cd));
return (NULL);
}