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Andrey Ryabinin 2b95fda2c4 X.509: Fix double free in x509_cert_parse() [ver #3] 
We shouldn't free cert->pub->key in x509_cert_parse() because
x509_free_certificate() also does this:
	BUG: Double free or freeing an invalid pointer
	...
	Call Trace:
	 [<ffffffff81896c20>] dump_stack+0x63/0x83
	 [<ffffffff81356571>] kasan_object_err+0x21/0x70
	 [<ffffffff81356ed9>] kasan_report_double_free+0x49/0x60
	 [<ffffffff813561ad>] kasan_slab_free+0x9d/0xc0
	 [<ffffffff81350b7a>] kfree+0x8a/0x1a0
	 [<ffffffff81844fbf>] public_key_free+0x1f/0x30
	 [<ffffffff818455d4>] x509_free_certificate+0x24/0x90
	 [<ffffffff818460bc>] x509_cert_parse+0x2bc/0x300
	 [<ffffffff81846cae>] x509_key_preparse+0x3e/0x330
	 [<ffffffff818444cf>] asymmetric_key_preparse+0x6f/0x100
	 [<ffffffff8178bec0>] key_create_or_update+0x260/0x5f0
	 [<ffffffff8178e6d9>] SyS_add_key+0x199/0x2a0
	 [<ffffffff821d823b>] entry_SYSCALL_64_fastpath+0x1e/0xad
	Object at ffff880110bd1900, in cache kmalloc-512 size: 512
	....
	Freed:
	PID = 2579
	[<ffffffff8104283b>] save_stack_trace+0x1b/0x20
	[<ffffffff813558f6>] save_stack+0x46/0xd0
	[<ffffffff81356183>] kasan_slab_free+0x73/0xc0
	[<ffffffff81350b7a>] kfree+0x8a/0x1a0
	[<ffffffff818460a3>] x509_cert_parse+0x2a3/0x300
	[<ffffffff81846cae>] x509_key_preparse+0x3e/0x330
	[<ffffffff818444cf>] asymmetric_key_preparse+0x6f/0x100
	[<ffffffff8178bec0>] key_create_or_update+0x260/0x5f0
	[<ffffffff8178e6d9>] SyS_add_key+0x199/0x2a0
	[<ffffffff821d823b>] entry_SYSCALL_64_fastpath+0x1e/0xad

Fixes: db6c43bd21 ("crypto: KEYS: convert public key and digsig asym to the akcipher api")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
 		2016-11-25 12:57:48 +11:00
..
.gitignore X.509: Add a crypto key parser for binary (DER) X.509 certificates 2012-10-08 13:50:22 +10:30
Kconfig Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-05-30 15:20:18 -07:00
Makefile X.509: Move the trust validation code out to its own file 2016-04-11 22:42:55 +01:00
asymmetric_keys.h KEYS: Generalise x509_request_asymmetric_key() 2016-04-11 22:41:56 +01:00
asymmetric_type.c KEYS: Generalise x509_request_asymmetric_key() 2016-04-11 22:41:56 +01:00
mscode.asn1 pefile: Parse the "Microsoft individual code signing" data blob 2014-07-09 14:58:37 +01:00
mscode_parser.c pefile: Fix the failure of calculation for digest 2016-07-18 12:19:46 +10:00
pkcs7.asn1 PKCS#7: Appropriately restrict authenticated attributes and content type 2015-08-12 17:01:01 +01:00
pkcs7_key_type.c KEYS: The PKCS#7 test key type should use the secondary keyring 2016-05-11 14:31:55 +01:00
pkcs7_parser.c KEYS: Generalise system_verify_data() to provide access to internal content 2016-04-06 16:14:24 +01:00
pkcs7_parser.h PKCS#7: Make trust determination dependent on contents of trust keyring 2016-04-06 16:14:24 +01:00
pkcs7_trust.c KEYS: Generalise x509_request_asymmetric_key() 2016-04-11 22:41:56 +01:00
pkcs7_verify.c PKCS#7: Fix panic when referring to the empty AKID when DEBUG defined 2016-07-18 12:19:44 +10:00
public_key.c KEYS: Allow authentication data to be stored in an asymmetric key 2016-04-06 16:13:33 +01:00
restrict.c KEYS: Fix for erroneous trust of incorrectly signed X.509 certs 2016-07-18 12:19:47 +10:00
signature.c KEYS: Add identifier pointers to public_key_signature struct 2016-04-06 16:13:33 +01:00
verify_pefile.c PKCS#7: Make trust determination dependent on contents of trust keyring 2016-04-06 16:14:24 +01:00
verify_pefile.h KEYS: Generalise system_verify_data() to provide access to internal content 2016-04-06 16:14:24 +01:00
x509.asn1 X.509: Add bits needed for PKCS#7 2014-07-01 16:40:19 +01:00
x509_akid.asn1 X.509: Extract both parts of the AuthorityKeyIdentifier 2015-08-07 16:26:13 +01:00
x509_cert_parser.c X.509: Fix double free in x509_cert_parse() [ver #3] 2016-11-25 12:57:48 +11:00
x509_parser.h KEYS: Move the point of trust determination to __key_link() 2016-04-11 22:43:43 +01:00
x509_public_key.c KEYS: Move the point of trust determination to __key_link() 2016-04-11 22:43:43 +01:00