github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-22 04:34:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

RDMA/hns: Compute HEM index in 64-bit in hns_roce_v2_set_hem()

Browse Source 
In hns_roce_v2_set_hem() the HEM address indices are computed from
i, j and k (the base-chunk_ba_num decomposition of the 32-bit
table_idx) in 32-bit arithmetic and then assigned to u64 fields.
The recombined value always equals table_idx and cannot exceed
U32_MAX, so this is not a reachable overflow and has no user-visible
impact. Declare i, j and k as u64 so the calculation is done in
64-bit and the pattern no longer trips static analyzers.

No functional change intended.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Suggested-by: David Laight <david.laight.linux@gmail.com>
Signed-off-by: Alexander Chesnokov <Alexander.Chesnokov@kaspersky.com>
Link: https://patch.msgid.link/20260709050327.3547237-1-Alexander.Chesnokov@kaspersky.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Alexander Chesnokov 2026-07-09 08:03:27 +03:00 committed by Leon Romanovsky
parent 234895fa8b
commit 923e1cb4e5
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View File

@ -4393,7 +4393,7 @@ static int hns_roce_v2_set_hem(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_mhop mhop;
struct hns_roce_hem *hem;
unsigned long mhop_obj = obj;
int i, j, k;
u64 i, j, k;
int ret = 0;
u64 hem_idx = 0;
u64 l1_idx = 0;