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thunderbolt: Fix a missing check of kmemdup 

kmemdup may fail and return NULL. The fix adds a check and returns
NULL in case it fails to avoid NULL pointer dereferecen.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Kangjie Lu 2019-03-14 01:55:31 -05:00 committed by Mika Westerberg
parent 106204b56f
commit e4dfdd5804
1 changed files with 4 additions and 0 deletions
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4
drivers/thunderbolt/property.c
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@ -176,6 +176,10 @@ static struct tb_property_dir *__tb_property_parse_dir(const u32 *block,
} else {
dir->uuid = kmemdup(&block[dir_offset], sizeof(*dir->uuid),
GFP_KERNEL);
if (!dir->uuid) {
tb_property_free_dir(dir);
return NULL;
}
content_offset = dir_offset + 4;
content_len = dir_len - 4; /* Length includes UUID */
}