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commit 50ef80739d9e1e0df6616289ef2ff626a94666ee
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Author: Steve Dickson <steved@redhat.com>
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Date: Thu May 23 09:24:49 2019 -0400
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rpc.mountd: Fix e_hostname and e_uuid leaks
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strdup of exportent uuid and hostname in getexportent() ends up leaking
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memory. Free the memory before getexportent() is called again from xtab_read()
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Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1713360
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Signed-off-by: Nikhil Kshirsagar <nkshirsa@redhat.com>
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Signed-off-by: Steve Dickson <steved@redhat.com>
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diff --git a/support/export/xtab.c b/support/export/xtab.c
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index d42eeef..1e1d679 100644
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--- a/support/export/xtab.c
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+++ b/support/export/xtab.c
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@@ -50,6 +50,14 @@ xtab_read(char *xtab, char *lockfn, int is_export)
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while ((xp = getexportent(is_export==0, 0)) != NULL) {
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if (!(exp = export_lookup(xp->e_hostname, xp->e_path, is_export != 1)) &&
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!(exp = export_create(xp, is_export!=1))) {
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+ if(xp->e_hostname) {
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+ free(xp->e_hostname);
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+ xp->e_hostname=NULL;
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+ }
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+ if(xp->e_uuid) {
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+ free(xp->e_uuid);
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+ xp->e_uuid=NULL;
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+ }
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continue;
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}
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switch (is_export) {
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@@ -62,7 +70,16 @@ xtab_read(char *xtab, char *lockfn, int is_export)
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if ((xp->e_flags & NFSEXP_FSID) && xp->e_fsid == 0)
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v4root_needed = 0;
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break;
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- }
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+ }
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+ if(xp->e_hostname) {
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+ free(xp->e_hostname);
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+ xp->e_hostname=NULL;
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+ }
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+ if(xp->e_uuid) {
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+ free(xp->e_uuid);
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+ xp->e_uuid=NULL;
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+ }
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+
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}
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endexportent();
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xfunlock(lockid);
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diff --git a/support/nfs/exports.c b/support/nfs/exports.c
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index 5f4cb95..a7582ca 100644
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--- a/support/nfs/exports.c
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+++ b/support/nfs/exports.c
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@@ -179,9 +179,20 @@ getexportent(int fromkernel, int fromexports)
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}
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ee.e_hostname = xstrdup(hostname);
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- if (parseopts(opt, &ee, fromexports && !has_default_subtree_opts, NULL) < 0)
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- return NULL;
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+ if (parseopts(opt, &ee, fromexports && !has_default_subtree_opts, NULL) < 0) {
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+ if(ee.e_hostname)
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+ {
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+ xfree(ee.e_hostname);
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+ ee.e_hostname=NULL;
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+ }
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+ if(ee.e_uuid)
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+ {
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+ xfree(ee.e_uuid);
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+ ee.e_uuid=NULL;
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+ }
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+ return NULL;
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+ }
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/* resolve symlinks */
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if (realpath(ee.e_path, rpath) != NULL) {
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rpath[sizeof (rpath) - 1] = '\0';
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