[GIT PULL] core kernel fix

From: Ingo Molnar
Date: Tue Aug 25 2009 - 14:07:29 EST


Linus,

Please pull the latest core-fixes-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-fixes-for-linus

Thanks,

Ingo

------------------>
Kyle McMartin (1):
dma-debug: Fix check_unmap null pointer dereference


lib/dma-debug.c | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 65b0d99..58a9f9f 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -156,9 +156,13 @@ static bool driver_filter(struct device *dev)
return true;

/* driver filter on and initialized */
- if (current_driver && dev->driver == current_driver)
+ if (current_driver && dev && dev->driver == current_driver)
return true;

+ /* driver filter on, but we can't filter on a NULL device... */
+ if (!dev)
+ return false;
+
if (current_driver || !current_driver_name[0])
return false;

@@ -183,17 +187,17 @@ static bool driver_filter(struct device *dev)
return ret;
}

-#define err_printk(dev, entry, format, arg...) do { \
- error_count += 1; \
- if (driver_filter(dev) && \
- (show_all_errors || show_num_errors > 0)) { \
- WARN(1, "%s %s: " format, \
- dev_driver_string(dev), \
- dev_name(dev) , ## arg); \
- dump_entry_trace(entry); \
- } \
- if (!show_all_errors && show_num_errors > 0) \
- show_num_errors -= 1; \
+#define err_printk(dev, entry, format, arg...) do { \
+ error_count += 1; \
+ if (driver_filter(dev) && \
+ (show_all_errors || show_num_errors > 0)) { \
+ WARN(1, "%s %s: " format, \
+ dev ? dev_driver_string(dev) : "NULL", \
+ dev ? dev_name(dev) : "NULL", ## arg); \
+ dump_entry_trace(entry); \
+ } \
+ if (!show_all_errors && show_num_errors > 0) \
+ show_num_errors -= 1; \
} while (0);

/*
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