From: Shuqi Zhang <zhangshuqi3@xxxxxxxxxx> [ Upstream commit 4efd9f0d120c55b08852ee5605dbb02a77089a5d ] Replace kmalloc + memcpy with kmemdup() Signed-off-by: Shuqi Zhang <zhangshuqi3@xxxxxxxxxx> Reviewed-by: Ritesh Harjani <ritesh.list@xxxxxxxxx> Link: https://lore.kernel.org/r/20220525030120.803330-1-zhangshuqi3@xxxxxxxxxx Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Stable-dep-of: a44e84a9b776 ("ext4: fix deadlock due to mbcache entry corruption") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- fs/ext4/xattr.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 0081eab74b20..8f0e8b60ea20 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -1907,11 +1907,10 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, unlock_buffer(bs->bh); ea_bdebug(bs->bh, "cloning"); - s->base = kmalloc(bs->bh->b_size, GFP_NOFS); + s->base = kmemdup(BHDR(bs->bh), bs->bh->b_size, GFP_NOFS); error = -ENOMEM; if (s->base == NULL) goto cleanup; - memcpy(s->base, BHDR(bs->bh), bs->bh->b_size); s->first = ENTRY(header(s->base)+1); header(s->base)->h_refcount = cpu_to_le32(1); s->here = ENTRY(s->base + offset); -- 2.35.1
