This is a note to let you know that I've just added the patch titled
iwlwifi: fix freeing uninitialized pointer
to the 3.8-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:
iwlwifi-fix-freeing-uninitialized-pointer.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3309ccf7fcebceef540ebe90c65d2f94d745a45b Mon Sep 17 00:00:00 2001
From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Date: Tue, 16 Apr 2013 15:38:29 +0200
Subject: iwlwifi: fix freeing uninitialized pointer
From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
commit 3309ccf7fcebceef540ebe90c65d2f94d745a45b upstream.
If on iwl_dump_nic_event_log() error occurs before that function
initialize buf, we process uninitiated pointer in
iwl_dbgfs_log_event_read() and can hit "BUG at mm/slub.c:3409"
Resolves:
https://bugzilla.redhat.com/show_bug.cgi?id=951241
Reported-by: ian.odette@xxxxxxxxxx
Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/iwlwifi/dvm/debugfs.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/drivers/net/wireless/iwlwifi/dvm/debugfs.c
+++ b/drivers/net/wireless/iwlwifi/dvm/debugfs.c
@@ -2237,15 +2237,15 @@ static ssize_t iwl_dbgfs_log_event_read(
size_t count, loff_t *ppos)
{
struct iwl_priv *priv = file->private_data;
- char *buf;
- int pos = 0;
- ssize_t ret = -ENOMEM;
+ char *buf = NULL;
+ ssize_t ret;
- ret = pos = iwl_dump_nic_event_log(priv, true, &buf, true);
- if (buf) {
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
- kfree(buf);
- }
+ ret = iwl_dump_nic_event_log(priv, true, &buf, true);
+ if (ret < 0)
+ goto err;
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+err:
+ kfree(buf);
return ret;
}
Patches currently in stable-queue which might be from sgruszka@xxxxxxxxxx are
queue-3.8/iwlwifi-fix-freeing-uninitialized-pointer.patch
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