5.15-stable patches

added patches:
	bounds-use-the-right-number-of-bits-for-power-of-two-config_nr_cpus.patch

diff --git a/queue-5.15/bounds-use-the-right-number-of-bits-for-power-of-two-config_nr_cpus.patch b/queue-5.15/bounds-use-the-right-number-of-bits-for-power-of-two-config_nr_cpus.patch
new file mode 100644 (file)
index 0000000..c895a5c
--- /dev/null
+++ b/queue-5.15/bounds-use-the-right-number-of-bits-for-power-of-two-config_nr_cpus.patch
@@ -0,0 +1,44 @@
+From 5af385f5f4cddf908f663974847a4083b2ff2c79 Mon Sep 17 00:00:00 2001
+From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
+Date: Mon, 29 Apr 2024 15:47:51 +0100
+Subject: bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Matthew Wilcox (Oracle) <willy@infradead.org>
+
+commit 5af385f5f4cddf908f663974847a4083b2ff2c79 upstream.
+
+bits_per() rounds up to the next power of two when passed a power of
+two.  This causes crashes on some machines and configurations.
+
+Reported-by: Михаил Новоселов <m.novosyolov@rosalinux.ru>
+Tested-by: Ильфат Гаптрахманов <i.gaptrakhmanov@rosalinux.ru>
+Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3347
+Link: https://lore.kernel.org/all/1c978cf1-2934-4e66-e4b3-e81b04cb3571@rosalinux.ru/
+Fixes: f2d5dcb48f7b (bounds: support non-power-of-two CONFIG_NR_CPUS)
+Cc:  <stable@vger.kernel.org>
+Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
+Cc: Rik van Riel <riel@surriel.com>
+Cc: Mel Gorman <mgorman@techsingularity.net>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Cc: Ingo Molnar <mingo@kernel.org>
+Cc: Andrew Morton <akpm@linux-foundation.org>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ kernel/bounds.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/kernel/bounds.c
++++ b/kernel/bounds.c
+@@ -19,7 +19,7 @@ int main(void)
+       DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
+       DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
+ #ifdef CONFIG_SMP
+-      DEFINE(NR_CPUS_BITS, bits_per(CONFIG_NR_CPUS));
++      DEFINE(NR_CPUS_BITS, order_base_2(CONFIG_NR_CPUS));
+ #endif
+       DEFINE(SPINLOCK_SIZE, sizeof(spinlock_t));
+       /* End of constants */

diff --git a/queue-5.15/series b/queue-5.15/series
index c444fabc6f9e6598e3d896e91caee156d064db6b..22b0bc6df214a8fe8bdd753baf3369adc87fe167 100644 (file)
--- a/queue-5.15/series
+++ b/queue-5.15/series
@@ -75,3 +75,4 @@ riscv-fix-task_size-on-64-bit-nommu.patch
 i2c-smbus-fix-null-function-pointer-dereference.patch
 fbdev-fix-incorrect-address-computation-in-deferred-io.patch
 hid-i2c-hid-remove-i2c_hid_read_pending-flag-to-prevent-lock-up.patch
+bounds-use-the-right-number-of-bits-for-power-of-two-config_nr_cpus.patch