[PATCH] KEYS: key refcounting cleanup in keyctl_read_key

From	Vasily Averin <vvs@virtuozzo.com>
Newsgroups	linux.kernel
Subject	[PATCH] KEYS: key refcounting cleanup in keyctl_read_key
Date	2017-09-19 19:00 +0200
Message-ID	<uru2l-7SS-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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key_put is lost if key_permission() returns non-EACCES error

Fixes: 29db919063406 ("Keys: Add LSM hooks for key management [try #3]")
Reported-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
---
 security/keys/keyctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index ab0b337..70efb2d 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -771,7 +771,7 @@ long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
 	if (ret == 0)
 		goto can_read_key;
 	if (ret != -EACCES)
-		goto error;
+		goto error2;
 
 	/* we can't; see if it's searchable from this process's keyrings
 	 * - we automatically take account of the fact that it may be
-- 
2.7.4

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[PATCH] KEYS: key refcounting cleanup in keyctl_read_key Vasily Averin <vvs@virtuozzo.com> - 2017-09-19 19:00 +0200
  Re: [PATCH] KEYS: key refcounting cleanup in keyctl_read_key David Howells <dhowells@redhat.com> - 2017-09-25 17:30 +0200

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