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| author | Colin Ian King <colin.king@canonical.com> | 2019-10-28 10:06:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-04 17:01:24 +0300 |
| commit | 8e3ef7b444aec3d1059085ce41edaa76ee7340e7 (patch) | |
| tree | ffee09eabaeb6bf25cba3bc5cc7bc7ae38e2c23b /drivers/hwtracing/intel_th | |
| parent | 063f097fd65a90fca2cd49411a2d6e35b8ca25db (diff) | |
| download | linux-8e3ef7b444aec3d1059085ce41edaa76ee7340e7.tar.xz | |
intel_th: msu: Fix overflow in shift of an unsigned int
The shift of the unsigned int win->nr_blocks by PAGE_SHIFT may
potentially overflow. Note that the intended return of this shift
is expected to be a size_t however the shift is being performed as
an unsigned int. Fix this by casting win->nr_blocks to a size_t
before performing the shift.
Addresses-Coverity: ("Unintentional integer overflow")
Fixes: 615c164da0eb ("intel_th: msu: Introduce buffer interface")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/lkml/20190726113151.8967-1-colin.king@canonical.com/
Link: https://lore.kernel.org/r/20191028070651.9770-5-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/intel_th')
| -rw-r--r-- | drivers/hwtracing/intel_th/msu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c index 201a166fdff5..9dc9ae87b5e5 100644 --- a/drivers/hwtracing/intel_th/msu.c +++ b/drivers/hwtracing/intel_th/msu.c @@ -327,7 +327,7 @@ static size_t msc_win_total_sz(struct msc_window *win) struct msc_block_desc *bdesc = sg_virt(sg); if (msc_block_wrapped(bdesc)) - return win->nr_blocks << PAGE_SHIFT; + return (size_t)win->nr_blocks << PAGE_SHIFT; size += msc_total_sz(bdesc); if (msc_block_last_written(bdesc)) |