github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-02 11:33:28 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

crypto: qat - avoid memcpy() overflow warning

Browse Source 
The use of array_size() leads gcc to assume the memcpy() can have a larger
limit than actually possible, which triggers a string fortification warning:

In file included from include/linux/string.h:296,
                 from include/linux/bitmap.h:12,
                 from include/linux/cpumask.h:12,
                 from include/linux/sched.h:16,
                 from include/linux/delay.h:23,
                 from include/linux/iopoll.h:12,
                 from drivers/crypto/intel/qat/qat_common/adf_gen4_hw_data.c:3:
In function 'fortify_memcpy_chk',
    inlined from 'adf_gen4_init_thd2arb_map' at drivers/crypto/intel/qat/qat_common/adf_gen4_hw_data.c:401:3:
include/linux/fortify-string.h:579:4: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
  579 |    __write_overflow_field(p_size_field, size);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/fortify-string.h:588:4: error: call to '__read_overflow2_field' declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Werror=attribute-warning]
  588 |    __read_overflow2_field(q_size_field, size);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Add an explicit range check to avoid this.

Fixes: 5da6a2d535 ("crypto: qat - generate dynamically arbiter mappings")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Arnd Bergmann 2024-01-03 17:26:02 +01:00 committed by Herbert Xu
parent 109303336a
commit 23a22e831e
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/crypto/intel/qat/qat_common/adf_gen4_hw_data.c
View File

@ -398,6 +398,9 @@ int adf_gen4_init_thd2arb_map(struct adf_accel_dev *accel_dev)
ADF_GEN4_ADMIN_ACCELENGINES;
if (srv_id == SVC_DCC) {
if (ae_cnt > ICP_QAT_HW_AE_DELIMITER)
return -EINVAL;
memcpy(thd2arb_map, thrd_to_arb_map_dcc,
array_size(sizeof(*thd2arb_map), ae_cnt));
return 0;