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exfat: fix memory leak in exfat_load_bitmap()

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commit d2b537b3e533f28e0d97293fe9293161fe8cd137 upstream.

If the first directory entry in the root directory is not a bitmap
directory entry, 'bh' will not be released and reassigned, which
will cause a memory leak.

Fixes: 1e49a94cf707 ("exfat: add bitmap operations")
Cc: stable@vger.kernel.org
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yuezhang Mo 2024-09-03 15:01:09 +08:00 • committed by Ksawlii
parent e1bc326def
commit defa602d2c
1 changed files with 5 additions and 5 deletions
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10
fs/exfat/balloc.c
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@ -110,11 +110,8 @@ int exfat_load_bitmap(struct super_block *sb)
return -EIO; return -EIO;
type = exfat_get_entry_type(ep); type = exfat_get_entry_type(ep);
if (type == TYPE_UNUSED) if (type == TYPE_BITMAP &&
break; ep->dentry.bitmap.flags == 0x0) {
if (type != TYPE_BITMAP)
continue;
if (ep->dentry.bitmap.flags == 0x0) {
int err; int err;
err = exfat_allocate_bitmap(sb, ep); err = exfat_allocate_bitmap(sb, ep);
@ -122,6 +119,9 @@ int exfat_load_bitmap(struct super_block *sb)
return err; return err;
} }
brelse(bh); brelse(bh);
if (type == TYPE_UNUSED)
return -EINVAL;
} }
if (exfat_get_next_cluster(sb, &clu.dir)) if (exfat_get_next_cluster(sb, &clu.dir))