The x->len is passed as argument to npc_prep_mcam_ldata().
In the function, the len is used to reference elements of
int_info and int_info_mask array.
The arrays are of length NPC_MAX_EXTRACT_DATA_LEN.
Validating the x->len value so that it is not greater than
NPC_MAX_EXTRACT_DATA_LEN.
This patch also resolves warning observed with gcc 12 compiler.
log:
../drivers/common/cnxk/roc_npc_utils.c:13:26: warning: writing 16 bytes
into a region of size 0 [-Wstringop-overflow=]
ptr[idx] = data[len - 1 - idx];
../drivers/common/cnxk/roc_npc_utils.c:163:17: note: at offset 64 into
destination object ‘int_info’ of size 64
uint8_t int_info[NPC_MAX_EXTRACT_DATA_LEN];
Bugzilla ID: 854
Fixes: 665b6a7400bf ("common/cnxk: add NPC helper API")
Cc: stable@dpdk.org
Signed-off-by: Ankur Dwivedi <adwivedi@marvell.com>
Reviewed-by: Kiran Kumar K <kirankumark@marvell.com>
8540d7dbfc