The following commit has been merged into the irq/urgent branch of tip:

Commit-ID: d73f0f49daa84176c3beee1606e73c7ffb6af8b2 Gitweb: https://git.kernel.org/tip/d73f0f49daa84176c3beee1606e73c7ffb6af8b2 Author: Radhey Shyam Pandey radhey.shyam.pandey@amd.com AuthorDate: Fri, 09 Aug 2024 12:32:24 +05:30 Committer: Thomas Gleixner tglx@linutronix.de CommitterDate: Sat, 10 Aug 2024 10:39:24 +02:00

irqchip/xilinx: Fix shift out of bounds

The device tree property 'xlnx,kind-of-intr' is sanity checked that the bitmask contains only set bits which are in the range of the number of interrupts supported by the controller.

The check is done by shifting the mask right by the number of supported interrupts and checking the result for zero.

The data type of the mask is u32 and the number of supported interrupts is up to 32. In case of 32 interrupts the shift is out of bounds, resulting in a mismatch warning. The out of bounds condition is also reported by UBSAN:

UBSAN: shift-out-of-bounds in irq-xilinx-intc.c:332:22 shift exponent 32 is too large for 32-bit type 'unsigned int'

Fix it by promoting the mask to u64 for the test.

Fixes: d50466c90724 ("microblaze: intc: Refactor DT sanity check") Signed-off-by: Radhey Shyam Pandey radhey.shyam.pandey@amd.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/1723186944-3571957-1-git-send-email-radhey.shyam... --- drivers/irqchip/irq-xilinx-intc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c index 238d3d3..7e08714 100644 --- a/drivers/irqchip/irq-xilinx-intc.c +++ b/drivers/irqchip/irq-xilinx-intc.c @@ -189,7 +189,7 @@ static int __init xilinx_intc_of_init(struct device_node *intc, irqc->intr_mask = 0; }

- if (irqc->intr_mask >> irqc->nr_irq) + if ((u64)irqc->intr_mask >> irqc->nr_irq) pr_warn("irq-xilinx: mismatch in kind-of-intr param\n");

pr_info("irq-xilinx: %pOF: num_irq=%d, edge=0x%x\n",