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media: ccs: Fix CCS static data parsing for large block sizes

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BugLink: https://bugs.launchpad.net/bugs/2114239

commit 82b696750f0b60e7513082a10ad42786854f59f8 upstream.

The length field of the CCS static data blocks was mishandled, leading to
wrong interpretation of the length header for blocks that are 16 kiB in
size. Such large blocks are very, very rare and so this wasn't found
earlier.

As the length is used as part of input validation, the issue has no
security implications.

Fixes: a6b396f410 ("media: ccs: Add CCS static data parser library")
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Sakari Ailus
2024-12-03 10:10:23 +02:00
committed by Mehmet Basaran
parent 22e2934fd8
commit 58ef8e63d7
1 changed files with 1 additions and 1 deletions
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drivers/media/i2c/ccs/ccs-data.c
+1 -1
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@@ -98,7 +98,7 @@ ccs_data_parse_length_specifier(const struct __ccs_data_length_specifier *__len,
plen = ((size_t)
(__len3->length[0] &
((1 << CCS_DATA_LENGTH_SPECIFIER_SIZE_SHIFT) - 1))
<< 16) + (__len3->length[0] << 8) + __len3->length[1];
<< 16) + (__len3->length[1] << 8) + __len3->length[2];
break;
}
default: