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authorLinus Torvalds <torvalds@linux-foundation.org>2018-06-19 07:47:32 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-19 07:47:32 +0900
commitba4dbdedd3edc2798659bcd8b1a184ea8bdd04dc (patch)
treed04d912d17bfff0151922840c9dffbcabdcd6f41 /fs
parentc0d1a7eb1e601f54d301ff8a11a994e164ee65ae (diff)
parent92d34134193e5b129dc24f8d79cb9196626e8d7a (diff)
Merge tag 'jfs-4.18' of git://github.com/kleikamp/linux-shaggy
Pull jfs fix from Dave Kleikamp: "This fixes a too-small allocation in the xattr code" * tag 'jfs-4.18' of git://github.com/kleikamp/linux-shaggy: jfs: Fix inconsistency between memory allocation and ea_buf->max_size
Diffstat (limited to 'fs')
-rw-r--r--fs/jfs/xattr.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index c60f3d32ee91..a6797986b625 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -491,15 +491,17 @@ static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
if (size > PSIZE) {
/*
* To keep the rest of the code simple. Allocate a
- * contiguous buffer to work with
+ * contiguous buffer to work with. Make the buffer large
+ * enough to make use of the whole extent.
*/
- ea_buf->xattr = kmalloc(size, GFP_KERNEL);
+ ea_buf->max_size = (size + sb->s_blocksize - 1) &
+ ~(sb->s_blocksize - 1);
+
+ ea_buf->xattr = kmalloc(ea_buf->max_size, GFP_KERNEL);
if (ea_buf->xattr == NULL)
return -ENOMEM;
ea_buf->flag = EA_MALLOC;
- ea_buf->max_size = (size + sb->s_blocksize - 1) &
- ~(sb->s_blocksize - 1);
if (ea_size == 0)
return 0;