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| author | Changming Liu <charley.ashbringer@gmail.com> | 2020-03-11 00:13:20 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-12 18:26:15 +0300 |
| commit | 3f870a450304427892cefbec7fbc76a553586278 (patch) | |
| tree | 7af3965b1af3964fb283986d0aac1c4f87a6d4a5 /drivers/media | |
| parent | 80264809ea0a3fd2ee8251f31a9eb85d2c3fc77e (diff) | |
| download | linux-3f870a450304427892cefbec7fbc76a553586278.tar.xz | |
media: am437x-vpfe: exclude illegal values for enum when validing params from user space
When calling ccdc_data_size_max_bit() to validate data_sz in
vpfe_ccdc_validate_param(), it's treated as an enumeration ranging from
0 to 7 while essentially it's an 32 bit unsigned integer directly from
user space. This can make the return value of ccdc_data_size_max_bit()
underflow and bypass the following check.
To fix this, an additional check is added to the following if clause to
keep this enumaration variable in range. And if its value is not legal,
return -EINVAL properly.
Signed-off-by: Changming Liu <charley.ashbringer@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/am437x/am437x-vpfe.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c index e3f302bc2f96..e14a2933144b 100644 --- a/drivers/media/platform/am437x/am437x-vpfe.c +++ b/drivers/media/platform/am437x/am437x-vpfe.c @@ -285,6 +285,7 @@ vpfe_ccdc_validate_param(struct vpfe_ccdc *ccdc, max_data = ccdc_data_size_max_bit(ccdcparam->data_sz); if (ccdcparam->alaw.gamma_wd > VPFE_CCDC_GAMMA_BITS_09_0 || + ccdcparam->data_sz > VPFE_CCDC_DATA_8BITS || max_gamma > max_data) { vpfe_dbg(1, vpfe, "Invalid data line select\n"); return -EINVAL; |