6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>
[ Upstream commit 369a9c046c2fdfe037f05b43b84c386bdbccc103 ]
The alg instance should be released under the exception path, otherwise
there may be resource leak here.
To mitigate this, free the alg instance with crypto_free_shash when kmalloc
fails.
Fixes: 02fe26f25325 ("firmware_loader: Add debug message with checksum for FW file")
Signed-off-by: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@xxxxxxxxxxxxxxx>
Reviewed-by: Russ Weight <russ.weight@xxxxxxxxx>
Link: https://lore.kernel.org/r/20241016110335.3677924-1-cuigaosheng1@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/base/firmware_loader/main.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 0b18c6b46e65d..f3133ba831c5e 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -824,19 +824,18 @@ static void fw_log_firmware_info(const struct firmware *fw, const char *name, st
shash->tfm = alg;
if (crypto_shash_digest(shash, fw->data, fw->size, sha256buf) < 0)
- goto out_shash;
+ goto out_free;
for (int i = 0; i < SHA256_DIGEST_SIZE; i++)
sprintf(&outbuf[i * 2], "%02x", sha256buf[i]);
outbuf[SHA256_BLOCK_SIZE] = 0;
dev_dbg(device, "Loaded FW: %s, sha256: %s\n", name, outbuf);
-out_shash:
- crypto_free_shash(alg);
out_free:
kfree(shash);
kfree(outbuf);
kfree(sha256buf);
+ crypto_free_shash(alg);
}
#else
static void fw_log_firmware_info(const struct firmware *fw, const char *name,
--
2.43.0
