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| author | Chunyan Zhang <zhang.chunyan@linaro.org> | 2015-12-22 17:25:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 22:43:17 -0800 |
| commit | 7b3bb0e75395b2f3b0f95d9ae50581e989ba5e4c (patch) | |
| tree | 34567255c9cd134bb83ea16e196cebeb6bc6b9f1 /drivers/hwtracing/stm | |
| parent | c74f7e8281add80bdfa0ad2998b8df287b13df73 (diff) | |
| download | linux-7b3bb0e75395b2f3b0f95d9ae50581e989ba5e4c.tar.bz2 | |
stm class: Fix an off-by-one in master array allocation
Since both sw_start and sw_end are master indices, the size of array
that holds them is sw_end - sw_start + 1, which the current code gets
wrong, allocating one item less than required.
This patch corrects the allocation size, avoiding potential slab
corruption.
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
[alexander.shishkin@linux.intel.com: re-wrote the commit message]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/stm')
| -rw-r--r-- | drivers/hwtracing/stm/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c index ddcb606acea6..40a8b79ab7db 100644 --- a/drivers/hwtracing/stm/core.c +++ b/drivers/hwtracing/stm/core.c @@ -618,7 +618,7 @@ int stm_register_device(struct device *parent, struct stm_data *stm_data, if (!stm_data->packet || !stm_data->sw_nchannels) return -EINVAL; - nmasters = stm_data->sw_end - stm_data->sw_start; + nmasters = stm_data->sw_end - stm_data->sw_start + 1; stm = kzalloc(sizeof(*stm) + nmasters * sizeof(void *), GFP_KERNEL); if (!stm) return -ENOMEM; |