The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x d73f0f49daa84176c3beee1606e73c7ffb6af8b2 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024081227-gnarly-unplug-a067@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..
Possible dependencies:
d73f0f49daa8 ("irqchip/xilinx: Fix shift out of bounds") 67862a3c47fc ("irqchip/xilinx: Add support for multiple instances")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From d73f0f49daa84176c3beee1606e73c7ffb6af8b2 Mon Sep 17 00:00:00 2001 From: Radhey Shyam Pandey radhey.shyam.pandey@amd.com Date: Fri, 9 Aug 2024 12:32:24 +0530 Subject: [PATCH] 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...
diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c index 238d3d344949..7e08714d507f 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",