FAILED: patch "[PATCH] parisc: Try to fixup kernel exception in bad_area_nosemaphore" failed to apply to 5.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.15-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-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x f92a5e36b0c45cd12ac0d1bc44680c0dfae34543
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025082119-refining-upstream-528c@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From f92a5e36b0c45cd12ac0d1bc44680c0dfae34543 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Mon, 21 Jul 2025 16:13:13 -0400
Subject: [PATCH] parisc: Try to fixup kernel exception in bad_area_nosemaphore
 path of do_page_fault()

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v5.12+

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index c39de84e98b0..f1785640b049 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -363,6 +363,10 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 	mmap_read_unlock(mm);
 
 bad_area_nosemaphore:
+	if (!user_mode(regs) && fixup_exception(regs)) {
+		return;
+	}
+
 	if (user_mode(regs)) {
 		int signo, si_code;