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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2013-07-22 11:02:01 +0300 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2013-07-31 14:12:09 -0700 |
| commit | 11940c8728b8e4bd67d0afacefbb9391ff8f4201 (patch) | |
| tree | 3f9cfb58189f35e51d1d7ac7eccbace551e1719c /drivers/net/ethernet/mellanox/mlx5 | |
| parent | IB/mlx5: Fix stack info leak in mlx5_ib_alloc_ucontext() (diff) | |
| download | linux-dev-11940c8728b8e4bd67d0afacefbb9391ff8f4201.tar.xz linux-dev-11940c8728b8e4bd67d0afacefbb9391ff8f4201.zip | |
mlx5_core: Fix use after free in mlx5_cmd_comp_handler()
We can't dereference "ent" after passing it to free_cmd().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c index 205753a04cfc..40374063c01e 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -1113,7 +1113,13 @@ void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) for (i = 0; i < (1 << cmd->log_sz); i++) { if (test_bit(i, &vector)) { + struct semaphore *sem; + ent = cmd->ent_arr[i]; + if (ent->page_queue) + sem = &cmd->pages_sem; + else + sem = &cmd->sem; ktime_get_ts(&ent->ts2); memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); dump_command(dev, ent, 0); @@ -1136,10 +1142,7 @@ void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) } else { complete(&ent->done); } - if (ent->page_queue) - up(&cmd->pages_sem); - else - up(&cmd->sem); + up(sem); } } } |