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ext4: avoid unneeded lookup when xattr name is invalid

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In ext4_xattr_set_handle() we have checked the xattr name's length. So
we should also check it in ext4_xattr_get() to avoid unneeded lookup
caused by invalid name.

Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Zhang Zhen 2014-05-12 09:57:59 -04:00 committed by Theodore Ts'o
parent 1c8349a171
commit 230b8c1a7b
1 changed files with 3 additions and 0 deletions
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3
fs/ext4/xattr.c
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@ -369,6 +369,9 @@ ext4_xattr_get(struct inode *inode, int name_index, const char *name,
{
int error;
if (strlen(name) > 255)
return -ERANGE;
down_read(&EXT4_I(inode)->xattr_sem);
error = ext4_xattr_ibody_get(inode, name_index, name, buffer,
buffer_size);