diff options
| author | Thomas Huth <thuth@redhat.com> | 2018-07-24 13:52:04 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2018-11-05 15:09:54 +0100 |
| commit | a2b83a5165c567bb81fe4303d97a3cca5ccc8a15 (patch) | |
| tree | 7df8da1cc0cbb35fc82d464fc60628c554cbb733 /block/vvfat.c | |
| parent | b2f7a038bb4c4fc5ce6b8486e8513dfd97665e2a (diff) | |
block/vvfat: Fix crash when reporting error about too many files in directory
When using the vvfat driver with a directory that contains too many files,
QEMU currently crashes. This can be triggered like this for example:
mkdir /tmp/vvfattest
cd /tmp/vvfattest
for ((x=0;x<=513;x++)); do mkdir $x; done
qemu-system-x86_64 -drive \
file.driver=vvfat,file.dir=.,read-only=on,media=cdrom
Seems like read_directory() is changing the mapping->path variable. Make
sure we use the right pointer instead.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vvfat.c')
| -rw-r--r-- | block/vvfat.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/vvfat.c b/block/vvfat.c index fc41841a5c..f2e7d501cf 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -973,10 +973,10 @@ static int init_directories(BDRVVVFATState* s, mapping = array_get(&(s->mapping), i); if (mapping->mode & MODE_DIRECTORY) { + char *path = mapping->path; mapping->begin = cluster; if(read_directory(s, i)) { - error_setg(errp, "Could not read directory %s", - mapping->path); + error_setg(errp, "Could not read directory %s", path); return -1; } mapping = array_get(&(s->mapping), i); |