6.6-stable review patch. If anyone has any objections, please let me know.
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From: Will McVicker willmcvicker@google.com
[ Upstream commit d19d7345a7bcdb083b65568a11b11adffe0687af ]
With UBSAN_ARRAY_BOUNDS=y, I'm hitting the below panic due to dereferencing `ctx->clk_data.hws` before setting `ctx->clk_data.num = nr_clks`. Move that up to fix the crash.
UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP <snip> Call trace: samsung_clk_init+0x110/0x124 (P) samsung_clk_init+0x48/0x124 (L) samsung_cmu_register_one+0x3c/0xa0 exynos_arm64_register_cmu+0x54/0x64 __gs101_cmu_top_of_clk_init_declare+0x28/0x60 ...
Fixes: e620a1e061c4 ("drivers/clk: convert VL struct to struct_size") Signed-off-by: Will McVicker willmcvicker@google.com Link: https://lore.kernel.org/r/20250212183253.509771-1-willmcvicker@google.com Signed-off-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/samsung/clk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c index b6701905f2546..fa5bdf6b3a929 100644 --- a/drivers/clk/samsung/clk.c +++ b/drivers/clk/samsung/clk.c @@ -74,12 +74,12 @@ struct samsung_clk_provider * __init samsung_clk_init(struct device *dev, if (!ctx) panic("could not allocate clock provider context.\n");
+ ctx->clk_data.num = nr_clks; for (i = 0; i < nr_clks; ++i) ctx->clk_data.hws[i] = ERR_PTR(-ENOENT);
ctx->dev = dev; ctx->reg_base = base; - ctx->clk_data.num = nr_clks; spin_lock_init(&ctx->lock);
return ctx;