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mailbox: tegra-hsp: Use after free in tegra_hsp_remove_doorbells()

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We have to use the _safe version of list_for_each() because we're
freeing the pointer as we go along.  (This might not show up testing
depending on what config options you have enabled).

Fixes: 0fe88461a0 ("mailbox: Add Tegra HSP driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dan Carpenter 2016-11-18 14:34:10 +03:00 committed by Thierry Reding
parent 0fe88461a0
commit 68050eb6c6
1 changed files with 2 additions and 2 deletions
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4
drivers/mailbox/tegra-hsp.c
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@ -334,12 +334,12 @@ static struct mbox_chan *of_tegra_hsp_xlate(struct mbox_controller *mbox,
static void tegra_hsp_remove_doorbells(struct tegra_hsp *hsp)
{
struct tegra_hsp_doorbell *db;
struct tegra_hsp_doorbell *db, *tmp;
unsigned long flags;
spin_lock_irqsave(&hsp->lock, flags);
list_for_each_entry(db, &hsp->doorbells, list)
list_for_each_entry_safe(db, tmp, &hsp->doorbells, list)
__tegra_hsp_doorbell_destroy(db);
spin_unlock_irqrestore(&hsp->lock, flags);