block/vvfat: Fix crash when reporting error about too many files in directory
commita2b83a5165c567bb81fe4303d97a3cca5ccc8a15
authorThomas Huth <thuth@redhat.com>
Tue, 24 Jul 2018 11:52:04 +0000 (24 13:52 +0200)
committerKevin Wolf <kwolf@redhat.com>
Mon, 5 Nov 2018 14:09:54 +0000 (5 15:09 +0100)
tree7df8da1cc0cbb35fc82d464fc60628c554cbb733
parentb2f7a038bb4c4fc5ce6b8486e8513dfd97665e2a
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>
block/vvfat.c