Message ID | 1394605864-32237-4-git-send-email-famz@redhat.com |
---|---|
State | New |
Headers | show |
The Wednesday 12 Mar 2014 à 14:30:58 (+0800), Fam Zheng wrote : > bdrv_getlength could fail, check the return value before using it. > > Signed-off-by: Fam Zheng <famz@redhat.com> > --- > block.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/block.c b/block.c > index ce48fff..9de1385 100644 > --- a/block.c > +++ b/block.c > @@ -5083,7 +5083,12 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, > } > granularity >>= BDRV_SECTOR_BITS; > assert(granularity); > - bitmap_size = (bdrv_getlength(bs) >> BDRV_SECTOR_BITS); > + bitmap_size = bdrv_getlength(bs); > + if (bitmap_size < 0) { > + error_setg(errp, "could not get length of device"); > + return NULL; > + } > + bitmap_size >>= BDRV_SECTOR_BITS; > bitmap = g_malloc0(sizeof(BdrvDirtyBitmap)); > bitmap->bitmap = hbitmap_alloc(bitmap_size, ffs(granularity) - 1); > if (name) { > -- > 1.9.0 > > Reviewed-by: Benoit Canet <benoit@irqsave.net>
diff --git a/block.c b/block.c index ce48fff..9de1385 100644 --- a/block.c +++ b/block.c @@ -5083,7 +5083,12 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, } granularity >>= BDRV_SECTOR_BITS; assert(granularity); - bitmap_size = (bdrv_getlength(bs) >> BDRV_SECTOR_BITS); + bitmap_size = bdrv_getlength(bs); + if (bitmap_size < 0) { + error_setg(errp, "could not get length of device"); + return NULL; + } + bitmap_size >>= BDRV_SECTOR_BITS; bitmap = g_malloc0(sizeof(BdrvDirtyBitmap)); bitmap->bitmap = hbitmap_alloc(bitmap_size, ffs(granularity) - 1); if (name) {
bdrv_getlength could fail, check the return value before using it. Signed-off-by: Fam Zheng <famz@redhat.com> --- block.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)