linux-ext4 - [PATCH] fs/jbd: set pointer = NULL, after kfree it.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <50D7C04B.6010109@asianux.com>
Date:	Mon, 24 Dec 2012 10:39:07 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	akpm@...ux-foundation.org, jack@...e.cz
CC:	linux-ext4@...r.kernel.org
Subject: [PATCH] fs/jbd: set pointer = NULL, after kfree it.


  set pointer = NULL, after call journal_destroy_revoke_table.
    in journal_destroy_revoke_table, it will call kfree to free the buffer.

Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 fs/jbd/revoke.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/jbd/revoke.c b/fs/jbd/revoke.c
index 25c713e..d6457b0 100644
--- a/fs/jbd/revoke.c
+++ b/fs/jbd/revoke.c
@@ -295,6 +295,7 @@ int journal_init_revoke(journal_t *journal, int hash_size)
 
 fail1:
 	journal_destroy_revoke_table(journal->j_revoke_table[0]);
+	journal->j_revoke_table[0] = NULL;
 fail0:
 	return -ENOMEM;
 }
@@ -303,10 +304,14 @@ fail0:
 void journal_destroy_revoke(journal_t *journal)
 {
 	journal->j_revoke = NULL;
-	if (journal->j_revoke_table[0])
+	if (journal->j_revoke_table[0]) {
 		journal_destroy_revoke_table(journal->j_revoke_table[0]);
-	if (journal->j_revoke_table[1])
+		journal->j_revoke_table[0] = NULL;
+	}
+	if (journal->j_revoke_table[1]) {
 		journal_destroy_revoke_table(journal->j_revoke_table[1]);
+		journal->j_revoke_table[1] = NULL;
+	}
 }
 
 
-- 
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html