On Sat, Jun 22, 2013 at 02:39:21PM +0900, Kusanagi Kouichi wrote:
> 'btrfs subvolume delete' crashes with segv if it runs in a detached mount.
One does not even need to do the lazy unmount. If the there are 2
processes attempting to delete the same snapshot and one deletes the
snapshot directory entry between lines 216 and 227,
215 res = test_issubvolume(path);
216 if(res<0){
217 fprintf(stderr, "ERROR: error accessing '%s'\n", path);
218 ret = 12;
219 goto out;
220 }
221 if(!res){
222 fprintf(stderr, "ERROR: '%s' is not a subvolume\n", path);
223 ret = 13;
224 goto out;
225 }
226
227 cpath = realpath(path, 0);
the segfault occurs as well.
david
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