diff mbox series

[net-next,11/15] net/mlx5: HWS, fix definer's HWS_SET32 macro for negative offset

Message ID 20250102181415.1477316-12-tariqt@nvidia.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series mlx5 Hardware Steering part 2 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers fail 1 blamed authors not CCed: hamdani@nvidia.com; 2 maintainers not CCed: linux-rdma@vger.kernel.org hamdani@nvidia.com
netdev/build_clang success Errors and warnings before: 2 this patch: 2
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch warning WARNING: line length of 91 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2025-01-04--18-00 (tests: 887)

Commit Message

Tariq Toukan Jan. 2, 2025, 6:14 p.m. UTC 
From: Yevgeny Kliteynik <kliteyn@nvidia.com>

When bit offset for HWS_SET32 macro is negative,
UBSAN complains about the shift-out-of-bounds:

  UBSAN: shift-out-of-bounds in
  drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c:177:2
  shift exponent -8 is negative

Fixes: 74a778b4a63f ("net/mlx5: HWS, added definers handling")
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Erez Shitrit <erezsh@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c
index 8fe96eb76baf..10ece7df1cfa 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c
@@ -70,7 +70,7 @@ 
 			u32 second_dw_mask = (mask) & ((1 << _bit_off) - 1); \
 			_HWS_SET32(p, (v) >> _bit_off, byte_off, 0, (mask) >> _bit_off); \
 			_HWS_SET32(p, (v) & second_dw_mask, (byte_off) + DW_SIZE, \
-				    (bit_off) % BITS_IN_DW, second_dw_mask); \
+				    (bit_off + BITS_IN_DW) % BITS_IN_DW, second_dw_mask); \
 		} else { \
 			_HWS_SET32(p, v, byte_off, (bit_off), (mask)); \
 		} \