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pstore: fix crypto dependencies without compression

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Commit 58eb5b6707 ("pstore: fix crypto dependencies") fixed up the crypto
dependencies but missed the case when no compression is selected.

With CONFIG_PSTORE=y, CONFIG_PSTORE_COMPRESS=n  and CONFIG_CRYPTO=m we see
the following link error:

fs/pstore/platform.o: In function `pstore_register':
(.text+0x1b1): undefined reference to `crypto_has_alg'
(.text+0x205): undefined reference to `crypto_alloc_base'
fs/pstore/platform.o: In function `pstore_unregister':
(.text+0x3b0): undefined reference to `crypto_destroy_tfm'

Fix this by checking at compile-time if CONFIG_PSTORE_COMPRESS is enabled.

Fixes: 58eb5b6707 ("pstore: fix crypto dependencies")
Signed-off-by: Tobias Regnery <tobias.regnery@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Tobias Regnery 2018-04-06 09:25:17 +02:00 committed by Kees Cook
parent 58eb5b6707
commit e698aaf37f
1 changed files with 2 additions and 2 deletions
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4
fs/pstore/platform.c
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@ -258,7 +258,7 @@ static int pstore_decompress(void *in, void *out,
static void allocate_buf_for_compression(void)
{
if (!zbackend)
if (!IS_ENABLED(CONFIG_PSTORE_COMPRESS) || !zbackend)
return;
if (!crypto_has_comp(zbackend->name, 0, 0)) {
@ -287,7 +287,7 @@ static void allocate_buf_for_compression(void)
static void free_buf_for_compression(void)
{
if (!IS_ERR_OR_NULL(tfm))
if (IS_ENABLED(CONFIG_PSTORE_COMPRESS) && !IS_ERR_OR_NULL(tfm))
crypto_free_comp(tfm);
kfree(big_oops_buf);
big_oops_buf = NULL;