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mlx5: use after free in mlx5_cmd_comp_handler()

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We can't dereference "ent" after passing it to free_cmd().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2013-07-22 11:02:01 +03:00 committed by David S. Miller
parent 4ea72445bd
commit 64d2c22a4c
1 changed files with 7 additions and 4 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/cmd.c
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@ -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);
}
}
}