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| author | J Freyensee <james_p_freyensee@linux.intel.com> | 2011-05-25 14:38:18 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-07 10:01:18 -0700 |
| commit | 29021bccea0dc42d7d101004058438a9a4e693b1 (patch) | |
| tree | 134ae622ea3bab6a08c9b9684b1ee46ba55942ad /drivers/misc/pti.c | |
| parent | 9d031d94da453077bbc6108b7822fc751ac85299 (diff) | |
| download | linux-29021bccea0dc42d7d101004058438a9a4e693b1.tar.gz linux-29021bccea0dc42d7d101004058438a9a4e693b1.tar.bz2 linux-29021bccea0dc42d7d101004058438a9a4e693b1.zip | |
pti: double-free security PTI fix
This patch fixes a double-free error that will not always be
seen unless /dev/pti char interface is stressed.
Signed-off-by: J Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/misc/pti.c')
| -rw-r--r-- | drivers/misc/pti.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index bb6f9255c17c..be4857358d91 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -317,7 +317,8 @@ EXPORT_SYMBOL_GPL(pti_request_masterchannel); * a master, channel ID address * used to write to PTI HW. * - * @mc: master, channel apeture ID address to be released. + * @mc: master, channel apeture ID address to be released. This + * will de-allocate the structure via kfree(). */ void pti_release_masterchannel(struct pti_masterchannel *mc) { @@ -581,7 +582,7 @@ static int pti_char_open(struct inode *inode, struct file *filp) static int pti_char_release(struct inode *inode, struct file *filp) { pti_release_masterchannel(filp->private_data); - kfree(filp->private_data); + filp->private_data = NULL; return 0; } |