UBSAN: Undefined behaviour in drivers/scsi/megaraid/megaraid_sas_fp.c:117:32
index 255 is out of range for type 'MR_LD_SPAN_MAP [1]'
This commit 51087a8617fe (megaraid_sas : Extended VD support) defined those,
struct MR_FW_RAID_MAP {
u8 ldTgtIdToLd[MAX_RAIDMAP_LOGICAL_DRIVES+\
MAX_RAIDMAP_VIEWS];
struct MR_LD_SPAN_MAP ldSpanMap[1];
struct MR_FW_RAID_MAP_ALL {
struct MR_FW_RAID_MAP raidMap;
struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_DRV_RAID_MAP_ALL *map)
return &map->raidMap.ldSpanMap[ld].ldRaid;
Then, there are several paths could trigger that undefined behavior due to
out-of-bound access.
mr_update_load_balance_params
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT;\
ldCount++;
ld = MR_TargetIdToLdGet(ldCount, drv_map);
raid = MR_LdRaidGet(ld, drv_map)
megasas_build_io_fusion
megasas_build_ld_nonrw_fusion
ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
raid = MR_LdRaidGet(ld, local_map_ptr);
Any clue?
