From 3f420a49dd4d0c413b635dd621aa34eebce2d3d2 Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Mon, 5 Aug 2013 13:58:01 +0200 Subject: [PATCH] libmount: canonicalize for conversion from loopdev backing file # mount foo.img /mnt # umount foo.img umount: foo.img: not mounted The loopdev code (and sysfs backing_file) uses absolute paths, but libmount does not canonicalize the path before lookup for the backing file. References: https://bugzilla.redhat.com/show_bug.cgi?id=950497 Signed-off-by: Karel Zak --- libmount/src/context_umount.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libmount/src/context_umount.c b/libmount/src/context_umount.c index 2b791c4..b02902c 100644 --- a/libmount/src/context_umount.c +++ b/libmount/src/context_umount.c @@ -161,7 +161,12 @@ try_loopdev: struct stat st; if (stat(tgt, &st) == 0 && S_ISREG(st.st_mode)) { - int count = loopdev_count_by_backing_file(tgt, &loopdev); + int count; + + cn_tgt = mnt_resolve_path(tgt, cache); + count = loopdev_count_by_backing_file(cn_tgt, &loopdev); + if (!cache) + free(cn_tgt); if (count == 1) { DBG(CXT, mnt_debug_h(cxt, "umount: %s --> %s (retry)", tgt, loopdev)); -- 1.8.1.4