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| author | Colin Ian King <colin.king@canonical.com> | 2020-10-02 20:03:54 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2020-12-08 18:03:43 +0300 |
| commit | 88c52d805eb61da99aa4607fb5131f41c0ff6bd4 (patch) | |
| tree | dd64eca7de52b901114a0b9572adf345665b09b9 /drivers/gpu | |
| parent | 0fe8bf4d3edce7aad6c14b9d5d92ff54dc19f0ba (diff) | |
| download | linux-88c52d805eb61da99aa4607fb5131f41c0ff6bd4.tar.xz | |
drm/i915: fix size_t greater or equal to zero comparison
Currently the check that the unsigned size_t variable i is >= 0
is always true because the unsigned variable will never be negative,
causing the loop to run forever. Fix this by changing the
pre-decrement check to a zero check on i followed by a decrement of i.
Addresses-Coverity: ("Unsigned compared against 0")
Fixes: bfed6708d6c9 ("drm/i915: use vmap in shmem_pin_map")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201002170354.94627-1-colin.king@canonical.com
(cherry picked from commit e70956a2498dc81d8f2522cba074f55ae910e13c)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/shmem_utils.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.c b/drivers/gpu/drm/i915/gt/shmem_utils.c index 463af675fadd..5982b62f913d 100644 --- a/drivers/gpu/drm/i915/gt/shmem_utils.c +++ b/drivers/gpu/drm/i915/gt/shmem_utils.c @@ -73,7 +73,7 @@ void *shmem_pin_map(struct file *file) mapping_set_unevictable(file->f_mapping); return vaddr; err_page: - while (--i >= 0) + while (i--) put_page(pages[i]); kvfree(pages); return NULL; |