This is a note to let you know that I've just added the patch titled
net/mlx5: Check for invalid vector index on EQ creation
to the 6.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mlx5-check-for-invalid-vector-index-on-eq-creati.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 898ef1694d7a0e576cec40ae9b68376ac1d7a1e6
Author: Maher Sanalla <msanalla@xxxxxxxxxx>
Date: Tue Oct 15 12:32:05 2024 +0300
net/mlx5: Check for invalid vector index on EQ creation
[ Upstream commit d4f25be27e3ef7e23998fbd3dd4bff0602de7ae5 ]
Currently, mlx5 driver does not enforce vector index to be lower than
the maximum number of supported completion vectors when requesting a
new completion EQ. Thus, mlx5_comp_eqn_get() fails when trying to
acquire an IRQ with an improper vector index.
To prevent the case above, enforce that vector index value is
valid and lower than maximum in mlx5_comp_eqn_get() before handling the
request.
Fixes: f14c1a14e632 ("net/mlx5: Allocate completion EQs dynamically")
Signed-off-by: Maher Sanalla <msanalla@xxxxxxxxxx>
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index cb7e7e4104aff..99d9e8863bfd6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -1080,6 +1080,12 @@ int mlx5_comp_eqn_get(struct mlx5_core_dev *dev, u16 vecidx, int *eqn)
struct mlx5_eq_comp *eq;
int ret = 0;
+ if (vecidx >= table->max_comp_eqs) {
+ mlx5_core_dbg(dev, "Requested vector index %u should be less than %u",
+ vecidx, table->max_comp_eqs);
+ return -EINVAL;
+ }
+
mutex_lock(&table->comp_lock);
eq = xa_load(&table->comp_eqs, vecidx);
if (eq) {
