Patch "sign-file: Fix incorrect return values check" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    sign-file: Fix incorrect return values check

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     sign-file-fix-incorrect-return-values-check.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit ede90a361c63ece855025bef8f35321d5735ee28
Author: Yusong Gao <a869920004@xxxxxxxxx>
Date:   Wed Dec 13 10:31:10 2023 +0000

    sign-file: Fix incorrect return values check
    
    [ Upstream commit 829649443e78d85db0cff0c37cadb28fbb1a5f6f ]
    
    There are some wrong return values check in sign-file when call OpenSSL
    API. The ERR() check cond is wrong because of the program only check the
    return value is < 0 which ignored the return val is 0. For example:
    1. CMS_final() return 1 for success or 0 for failure.
    2. i2d_CMS_bio_stream() returns 1 for success or 0 for failure.
    3. i2d_TYPEbio() return 1 for success and 0 for failure.
    4. BIO_free() return 1 for success and 0 for failure.
    
    Link: https://www.openssl.org/docs/manmaster/man3/
    Fixes: e5a2e3c84782 ("scripts/sign-file.c: Add support for signing with a raw signature")
    Signed-off-by: Yusong Gao <a869920004@xxxxxxxxx>
    Reviewed-by: Juerg Haefliger <juerg.haefliger@xxxxxxxxxxxxx>
    Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20231213024405.624692-1-a869920004@xxxxxxxxx/ # v5
    Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index 7434e9ea926e2..12acc70e5a7a5 100644
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -322,7 +322,7 @@ int main(int argc, char **argv)
 				     CMS_NOSMIMECAP | use_keyid |
 				     use_signed_attrs),
 		    "CMS_add1_signer");
-		ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS | CMS_BINARY) < 0,
+		ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS | CMS_BINARY) != 1,
 		    "CMS_final");
 
 #else
@@ -341,10 +341,10 @@ int main(int argc, char **argv)
 			b = BIO_new_file(sig_file_name, "wb");
 			ERR(!b, "%s", sig_file_name);
 #ifndef USE_PKCS7
-			ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) < 0,
+			ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) != 1,
 			    "%s", sig_file_name);
 #else
-			ERR(i2d_PKCS7_bio(b, pkcs7) < 0,
+			ERR(i2d_PKCS7_bio(b, pkcs7) != 1,
 			    "%s", sig_file_name);
 #endif
 			BIO_free(b);
@@ -374,9 +374,9 @@ int main(int argc, char **argv)
 
 	if (!raw_sig) {
 #ifndef USE_PKCS7
-		ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) < 0, "%s", dest_name);
+		ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) != 1, "%s", dest_name);
 #else
-		ERR(i2d_PKCS7_bio(bd, pkcs7) < 0, "%s", dest_name);
+		ERR(i2d_PKCS7_bio(bd, pkcs7) != 1, "%s", dest_name);
 #endif
 	} else {
 		BIO *b;
@@ -396,7 +396,7 @@ int main(int argc, char **argv)
 	ERR(BIO_write(bd, &sig_info, sizeof(sig_info)) < 0, "%s", dest_name);
 	ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);
 
-	ERR(BIO_free(bd) < 0, "%s", dest_name);
+	ERR(BIO_free(bd) != 1, "%s", dest_name);
 
 	/* Finally, if we're signing in place, replace the original. */
 	if (replace_orig)




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