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efi-pstore: implement efivars_pstore_exit() 

The original efivars_pstore_exit() is empty. I
 1) add a bufsize check statement.
 2) call pstore_unregister as it is defined now.
 3) free the memory and set bufsize to 0.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Geliang Tang 2015-11-07 12:43:48 +08:00 committed by Kees Cook
parent 52d210d961
commit cae7316708
1 changed files with 7 additions and 0 deletions
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7
drivers/firmware/efi/efi-pstore.c
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@ -399,6 +399,13 @@ static __init int efivars_pstore_init(void)
static __exit void efivars_pstore_exit(void)
{
if (!efi_pstore_info.bufsize)
return;
pstore_unregister(&efi_pstore_info);
kfree(efi_pstore_info.buf);
efi_pstore_info.buf = NULL;
efi_pstore_info.bufsize = 0;
}
module_init(efivars_pstore_init);