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wifi: iwlwifi: yoyo: Fix possible division by zero

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[ 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: a9248de424 ("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.I5c2f3a882b50698b708d54f4524dc5bdf11e3d32@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Gabay 2023-04-13 21:40:34 +03:00 committed by Greg Kroah-Hartman
parent 7c31103f7f
commit 243f6d6ba5
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
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@ -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;