diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2013-03-14 13:33:15 +0000 |
|---|---|---|
| committer | Matthew Garrett <matthew.garrett@nebula.com> | 2013-05-08 19:59:44 -0400 |
| commit | a30450c7bbb04212c5f01936274ca8d965cabf79 (patch) | |
| tree | 24b59002cc5a75f4177297d9a4d5f73cfbca81c2 | |
| parent | 7783819920ca52fc582a2782f654fe6ed373f465 (diff) | |
dell-laptop: Fix krealloc() misuse in parse_da_table()
If krealloc() returns NULL, it *doesn't* free the original. So any code
of the form 'foo = krealloc(foo, …);' is almost certainly a bug.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
| -rw-r--r-- | drivers/platform/x86/dell-laptop.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index fa3ee6209572..1134119521ac 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -284,6 +284,7 @@ static void __init parse_da_table(const struct dmi_header *dm) { /* Final token is a terminator, so we don't want to copy it */ int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; + struct calling_interface_token *new_da_tokens; struct calling_interface_structure *table = container_of(dm, struct calling_interface_structure, header); @@ -296,12 +297,13 @@ static void __init parse_da_table(const struct dmi_header *dm) da_command_address = table->cmdIOAddress; da_command_code = table->cmdIOCode; - da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * - sizeof(struct calling_interface_token), - GFP_KERNEL); + new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * + sizeof(struct calling_interface_token), + GFP_KERNEL); - if (!da_tokens) + if (!new_da_tokens) return; + da_tokens = new_da_tokens; memcpy(da_tokens+da_num_tokens, table->tokens, sizeof(struct calling_interface_token) * tokens); |