diff mbox series

[net,3/8] net/mlx5: HWS, don't destroy more bwc queue locks than allocated

Message ID 20241015093208.197603-4-tariqt@nvidia.com (mailing list archive)
State Accepted
Commit 45bcbd49224ac5aec5e1239de9060e431ca2acd9
Delegated to: Netdev Maintainers
Headers show
Series mlx5 misc fixes 2024-10-15 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5 this patch: 5
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 2 maintainers not CCed: andrew+netdev@lunn.ch linux-rdma@vger.kernel.org
netdev/build_clang success Errors and warnings before: 3 this patch: 3
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: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 8 lines checked
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

Commit Message

Tariq Toukan Oct. 15, 2024, 9:32 a.m. UTC 
From: Cosmin Ratiu <cratiu@nvidia.com>

hws_send_queues_bwc_locks_destroy destroyed more queue locks than
allocated, leading to memory corruption (occasionally) and warnings such
as DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock)) in __mutex_destroy because
sometimes, the 'mutex' being destroyed was random memory.
The severity of this problem is proportional to the number of queues
configured because the code overreaches beyond the end of the
bwc_send_queue_locks array by 2x its length.

Fix that by using the correct number of bwc queues.

Fixes: 2ca62599aa0b ("net/mlx5: HWS, added send engine and context handling")
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 .../net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c
index 0c7989184c30..e101dc46d99e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c
@@ -941,7 +941,7 @@  static void __hws_send_queues_close(struct mlx5hws_context *ctx, u16 queues)
 
 static void hws_send_queues_bwc_locks_destroy(struct mlx5hws_context *ctx)
 {
-	int bwc_queues = ctx->queues - 1;
+	int bwc_queues = mlx5hws_bwc_queues(ctx);
 	int i;
 
 	if (!mlx5hws_context_bwc_supported(ctx))