From: Daniel Gabay daniel.gabay@intel.com
[ Upstream commit ba30415118eee374a08b39a0460a1d1e52c24a25 ]
Don't allow buffer allocation TLV with zero req_size since it leads later to division by zero in iwl_dbg_tlv_alloc_fragments(). Also, NPK/SRAM locations are allowed to have zero buffer req_size, don't discard them.
Fixes: a9248de42464 ("iwlwifi: dbg_ini: add TLV allocation new API support") Signed-off-by: Daniel Gabay daniel.gabay@intel.com Signed-off-by: Gregory Greenman gregory.greenman@intel.com Link: https://lore.kernel.org/r/20230413213309.5d6688ed74d8.I5c2f3a882b50698b708d5... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c index 48e7376a5fea7..7ed4991f8dab9 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c @@ -138,6 +138,12 @@ static int iwl_dbg_tlv_alloc_buf_alloc(struct iwl_trans *trans, alloc_id != IWL_FW_INI_ALLOCATION_ID_DBGC1) goto err;
+ if (buf_location == IWL_FW_INI_LOCATION_DRAM_PATH && + alloc->req_size == 0) { + IWL_ERR(trans, "WRT: Invalid DRAM buffer allocation requested size (0)\n"); + return -EINVAL; + } + trans->dbg.fw_mon_cfg[alloc_id] = *alloc;
return 0;