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autofs-5.1.8 - fix minus only option handling in concat_options()
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From: Ian Kent <raven@themaw.net>
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While a '-' alone isn't strictly valid it hadn't previously cuased a
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parse error. So commit 9047e91ffa69 (autofs-5.1.7 - fix concat_options()
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error handling) introduced a regression by no longer allowing this.
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Fix this regression by only failing if errno is set to a non-zero value
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on return from concat_options() as well as returning NULL.
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Fixes: 9047e91ffa69 (autofs-5.1.7 - fix concat_options() error handling)
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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modules/parse_sun.c | 25 +++++++++++++++++++------
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2 files changed, 20 insertions(+), 6 deletions(-)
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--- autofs-5.1.4.orig/CHANGELOG
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+++ autofs-5.1.4/CHANGELOG
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@@ -103,6 +103,7 @@
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- fix deadlock with hosts map reload.
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- fix memory leak in update_hosts_mounts().
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- fix concat_options() error handling.
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+- fix minus only option handling in concat_options().
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xx/xx/2018 autofs-5.1.5
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- fix flag file permission.
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--- autofs-5.1.4.orig/modules/parse_sun.c
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+++ autofs-5.1.4/modules/parse_sun.c
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@@ -376,10 +376,16 @@ static int do_init(int argc, const char
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if (gbl_options) {
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append_options = defaults_get_append_options();
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if (append_options) {
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- char *tmp = concat_options(gbl_options, ctxt->optstr);
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+ char *tmp;
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+
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+ errno = 0;
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+ tmp = concat_options(gbl_options, ctxt->optstr);
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if (!tmp) {
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- char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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- logerr(MODPREFIX "concat_options: %s", estr);
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+ /* Ignore non-error NULL return */
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+ if (errno) {
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+ char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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+ logerr(MODPREFIX "concat_options: %s", estr);
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+ }
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/* freed in concat_options */
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ctxt->optstr = NULL;
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} else
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@@ -996,9 +1002,12 @@ static int parse_mapent(const char *ent,
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free(myoptions);
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myoptions = newopt;
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} else if (newopt) {
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+ errno = 0;
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tmp = concat_options(myoptions, newopt);
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- if (!tmp) {
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+ /* Ignore non-error NULL return */
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+ if (!tmp && errno) {
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char *estr;
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+
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estr = strerror_r(errno, buf, MAX_ERR_BUF);
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error(logopt, MODPREFIX
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"concat_options: %s", estr);
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@@ -1370,8 +1379,10 @@ dont_expand:
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free(mnt_options);
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mnt_options = noptions;
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} else if (noptions) {
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+ errno = 0;
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tmp = concat_options(mnt_options, noptions);
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- if (!tmp) {
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+ /* Ignore non-error NULL return */
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+ if (!tmp && errno) {
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char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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error(ap->logopt,
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MODPREFIX "concat_options: %s", estr);
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@@ -1395,8 +1406,10 @@ dont_expand:
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free(options);
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options = mnt_options;
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} else if (mnt_options) {
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+ errno = 0;
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tmp = concat_options(options, mnt_options);
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- if (!tmp) {
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+ /* Ignore non-error NULL return */
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+ if (!tmp && errno) {
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char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
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error(ap->logopt, MODPREFIX "concat_options: %s", estr);
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free(pmapent);
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