The code that has been added to strip trailing slashes from path in
unexportfs_parsed() forgot to account for the case of the root
directory, which is simply '/'. In that case it accesses path[-1] and
reduces the path to an empty string, which then fails to match any
export.
Fix it by stopping the stripping when the path is just a single
character - it doesn't matter if it's a '/' or not, we want to keep it
either way in that case.
Reproducer:
exportfs localhost:/
exportfs -u localhost:/
Without this patch, the unexport step fails with "exportfs: Could not
find 'localhost:/' to unexport."
Fixes: a9a7728d8743 ("exportfs: Deal with path's trailing "/" in unexportfs_parsed()")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1941171
Signed-off-by: Ondrej Mosnacek <omosnace@xxxxxxxxxx>
---
utils/exportfs/exportfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/utils/exportfs/exportfs.c b/utils/exportfs/exportfs.c
index 262dd19a..1aedd3d6 100644
--- a/utils/exportfs/exportfs.c
+++ b/utils/exportfs/exportfs.c
@@ -383,7 +383,7 @@ unexportfs_parsed(char *hname, char *path, int verbose)
* so need to deal with it.
*/
size_t nlen = strlen(path);
- while (path[nlen - 1] == '/')
+ while (nlen > 1 && path[nlen - 1] == '/')
nlen--;
for (exp = exportlist[htype].p_head; exp; exp = exp->m_next) {
--
2.30.2
