diff options
| author |   Aya Levin <ayal@mellanox.com> | 2018-11-15 18:05:15 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-11-15 16:09:31 -0800 |
| commit | a463146e67c848cbab5ce706d6528281b7cded08 (patch) | |
| tree | 824d23c2ec65e42a6656221b6f749880455cbaca /drivers/net | |
| parent | net/mlx4_core: Fix uninitialized variable compilation warning (diff) | |
| download | linux-dev-a463146e67c848cbab5ce706d6528281b7cded08.tar.xz linux-dev-a463146e67c848cbab5ce706d6528281b7cded08.zip | |
net/mlx4: Fix UBSAN warning of signed integer overflow
UBSAN: Undefined behavior in
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c:626:29
signed integer overflow: 1802201963 + 1802201963 cannot be represented
in type 'int'
The union of res_reserved and res_port_rsvd[MLX4_MAX_PORTS] monitors
granting of reserved resources. The grant operation is calculated and
protected, thus both members of the union cannot be negative. Changed
type of res_reserved and of res_port_rsvd[MLX4_MAX_PORTS] from signed
int to unsigned int, allowing large value.
Fixes: 5a0d0a6161ae ("mlx4: Structures and init/teardown for VF resource quotas")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mlx4.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h index ebcd2778eeb3..23f1b5b512c2 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h @@ -540,8 +540,8 @@ struct slave_list { struct resource_allocator { spinlock_t alloc_lock; /* protect quotas */ union { - int res_reserved; - int res_port_rsvd[MLX4_MAX_PORTS]; + unsigned int res_reserved; + unsigned int res_port_rsvd[MLX4_MAX_PORTS]; }; union { int res_free; |