adapter->kioc_list is allocated using kmalloc_array() so its values are
left uninitialized. In a rare OOM case when dma_pool_alloc() fails in
mraid_mm_register_adp(), we should free the already allocated DMA pools
but comparing kioc->pthru32 with NULL doesn't guard from accessing uninit
memory.
Properly roll back in error case: free array members with lower indices.
Found by Linux Verification Center (linuxtesting.org).
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Fedor Pchelkin <pchelkin@xxxxxxxxx>
---
drivers/scsi/megaraid/megaraid_mm.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
index c509440bd161..701eb5ee2a69 100644
--- a/drivers/scsi/megaraid/megaraid_mm.c
+++ b/drivers/scsi/megaraid/megaraid_mm.c
@@ -1001,12 +1001,10 @@ mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
pthru_dma_pool_error:
- for (i = 0; i < lld_adp->max_kioc; i++) {
+ while (--i >= 0) {
kioc = adapter->kioc_list + i;
- if (kioc->pthru32) {
- dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
- kioc->pthru32_h);
- }
+ dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
+ kioc->pthru32_h);
}
memalloc_error:
--
2.43.0
