The patch titled
statistics: fix buffer overflow in histogram with linear scale
has been added to the -mm tree. Its filename is
statistics-infrastructure-fix-buffer-overflow-in-histogram-with-linear.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: statistics: fix buffer overflow in histogram with linear scale
From: Martin Peschke <mp3@xxxxxxxxxx>
Values outside the range covered by a histogram with linear scale resulted
in invalid indices pointing to non-existing 'buckets'. Index is adjusted
to array boundaries, if required.
Signed-off-by: Martin Peschke <mp3@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
lib/statistic.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff -puN lib/statistic.c~statistics-infrastructure-fix-buffer-overflow-in-histogram-with-linear lib/statistic.c
--- a/lib/statistic.c~statistics-infrastructure-fix-buffer-overflow-in-histogram-with-linear
+++ a/lib/statistic.c
@@ -1028,9 +1028,12 @@ static s64 statistic_histogram_calc_valu
static int statistic_histogram_calc_index_lin(struct statistic *stat, s64 value)
{
- unsigned long long i = value - stat->u.histogram.range_min;
+ unsigned long long i;
+ if (value <= stat->u.histogram.range_min)
+ return 0;
+ i = value - stat->u.histogram.range_min;
do_div(i, stat->u.histogram.base_interval);
- return i;
+ return min(i, (unsigned long long)(stat->u.histogram.last_index));
}
static int statistic_histogram_calc_index_log2(struct statistic *stat,
_
Patches currently in -mm which might be from mp3@xxxxxxxxxx are
tty-switch-to-ktermios-sclp-fix.patch
tty-switch-to-ktermios-3270-fix.patch
statistics-infrastructure-prerequisite-list.patch
statistics-infrastructure-prerequisite-parser.patch
statistics-infrastructure-prerequisite-timestamp.patch
statistics-infrastructure-make-printk_clock-a-generic-kernel-wide-nsec-resolution.patch
statistics-infrastructure-documentation.patch
statistics-infrastructure.patch
statistics-infrastructure-fix-buffer-overflow-in-histogram-with-linear.patch
statistics-use-the-enhanced-percpu-interface.patch
statistics-replace-inode-ugeneric_ip-with-i_private.patch
statistics-infrastructure-exploitation-zfcp.patch
zfcp-gather-hba-specific-latencies-in-statistics.patch
-
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