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clk: imx: scu: use _safe list iterator to avoid a use after free

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[ Upstream commit 632c60ecd2 ]

This loop is freeing "clk" so it needs to use list_for_each_entry_safe().
Otherwise it dereferences a freed variable to get the next item on the
loop.

Fixes: 77d8f3068c ("clk: imx: scu: add two cells binding support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/0793fbd1-d2b5-4ec2-9403-3c39343a3e2d@kili.mountain
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter
2023-04-19 17:23:01 +03:00
committed by Greg Kroah-Hartman
parent 3fc9637f37
commit 08cc7cd2c2
1 changed files with 2 additions and 2 deletions
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4
drivers/clk/imx/clk-scu.c
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@@ -707,11 +707,11 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name,
void imx_clk_scu_unregister(void) void imx_clk_scu_unregister(void)
{ {
struct imx_scu_clk_node *clk; struct imx_scu_clk_node *clk, *n;
int i; int i;
for (i = 0; i < IMX_SC_R_LAST; i++) { for (i = 0; i < IMX_SC_R_LAST; i++) {
list_for_each_entry(clk, &imx_scu_clks[i], node) { list_for_each_entry_safe(clk, n, &imx_scu_clks[i], node) {
clk_hw_unregister(clk->hw); clk_hw_unregister(clk->hw);
kfree(clk); kfree(clk);
} }