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autofs-5.1.6 - fix empty mounts list return from unlink_mount_tree()
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From: Ian Kent <raven@themaw.net>
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If there are no appropriate mounts found by get_mnt_list() then
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unlink_mount_tree() should return 1 not 0 since if there are no
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mounts to umount this shouldn't cause a failure return.
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Also, if a real error occurs in get_mnt_list() we should check for
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it and return a failure from unlink_mount_tree() since that would
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be mount table not found or out of memory. If that's ignored things
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would only get worse from that point.
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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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lib/mounts.c | 8 ++++++--
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2 files changed, 7 insertions(+), 2 deletions(-)
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--- autofs-5.1.4.orig/CHANGELOG
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+++ autofs-5.1.4/CHANGELOG
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@@ -75,6 +75,7 @@
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- fix direct mount deadlock.
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- fix lookup_prune_one_cache() refactoring change.
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- add missing description of null map option.
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+- fix empty mounts list return from unlink_mount_tree().
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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/lib/mounts.c
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+++ autofs-5.1.4/lib/mounts.c
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@@ -2115,9 +2115,13 @@ int unlink_mount_tree(struct autofs_poin
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struct mnt_list *mnts, *mnt;
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int rv, ret = 1;
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+ errno = 0;
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mnts = get_mnt_list(mp, 1);
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- if (!mnts)
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- return 0;
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+ if (!mnts) {
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+ if (errno)
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+ return 0;
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+ return 1;
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+ }
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for (mnt = mnts; mnt; mnt = mnt->next) {
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if (mnt->flags & MNTS_AUTOFS)
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