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authorTomas Winkler <tomas.winkler@intel.com>2012-06-19 09:13:36 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-20 16:41:38 -0700
commit7d5e0e59542ac452585e3a33abcad6e26b4dec4a (patch)
tree65ca4973cc393a66adff7def5401f0d84903f7ae /drivers/misc
parent169d1338ed4ed91412761a77095a13b9992993ba (diff)
downloadlinux-7d5e0e59542ac452585e3a33abcad6e26b4dec4a.tar.bz2
mei: mei_irq_thread_write_handler check for overflow
check for overflow when retrieving empty write slots Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/interrupt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 83e80bc08d77..8e4dd74b96e5 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -1204,6 +1204,9 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
return 0;
}
*slots = mei_count_empty_write_slots(dev);
+ if (*slots <= 0)
+ return -EMSGSIZE;
+
/* complete all waiting for write CB */
dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");