This is a note to let you know that I've just added the patch titled
LoongArch: Fix lockdep static memory detection
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
loongarch-fix-lockdep-static-memory-detection.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 68ffa230daa0d35b7cce476098433d763d5fd42f Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Wed, 20 Sep 2023 14:26:28 +0800
Subject: LoongArch: Fix lockdep static memory detection
From: Helge Deller <deller@xxxxxx>
commit 68ffa230daa0d35b7cce476098433d763d5fd42f upstream.
Since commit 0a6b58c5cd0d ("lockdep: fix static memory detection even
more") the lockdep code uses is_kernel_core_data(), is_kernel_rodata()
and init_section_contains() to verify if a lock is located inside a
kernel static data section.
This change triggers a failure on LoongArch, for which the vmlinux.lds.S
script misses to put the locks (as part of in the .data.rel symbols)
into the Linux data section.
This patch fixes the lockdep problem by moving *(.data.rel*) symbols
into the kernel data section (from _sdata to _edata).
Additionally, move other wrongly assigned symbols too:
- altinstructions into the _initdata section,
- PLT symbols behind the read-only section, and
- *(.la_abs) into the data section.
Cc: stable <stable@xxxxxxxxxx> # v6.4+
Fixes: 0a6b58c5cd0d ("lockdep: fix static memory detection even more")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/loongarch/kernel/vmlinux.lds.S | 55 ++++++++++++++++++------------------
1 file changed, 28 insertions(+), 27 deletions(-)
--- a/arch/loongarch/kernel/vmlinux.lds.S
+++ b/arch/loongarch/kernel/vmlinux.lds.S
@@ -53,33 +53,6 @@ SECTIONS
. = ALIGN(PECOFF_SEGMENT_ALIGN);
_etext = .;
- /*
- * struct alt_inst entries. From the header (alternative.h):
- * "Alternative instructions for different CPU types or capabilities"
- * Think locking instructions on spinlocks.
- */
- . = ALIGN(4);
- .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
- __alt_instructions = .;
- *(.altinstructions)
- __alt_instructions_end = .;
- }
-
-#ifdef CONFIG_RELOCATABLE
- . = ALIGN(8);
- .la_abs : AT(ADDR(.la_abs) - LOAD_OFFSET) {
- __la_abs_begin = .;
- *(.la_abs)
- __la_abs_end = .;
- }
-#endif
-
- .got : ALIGN(16) { *(.got) }
- .plt : ALIGN(16) { *(.plt) }
- .got.plt : ALIGN(16) { *(.got.plt) }
-
- .data.rel : { *(.data.rel*) }
-
. = ALIGN(PECOFF_SEGMENT_ALIGN);
__init_begin = .;
__inittext_begin = .;
@@ -94,6 +67,18 @@ SECTIONS
__initdata_begin = .;
+ /*
+ * struct alt_inst entries. From the header (alternative.h):
+ * "Alternative instructions for different CPU types or capabilities"
+ * Think locking instructions on spinlocks.
+ */
+ . = ALIGN(4);
+ .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
+ __alt_instructions = .;
+ *(.altinstructions)
+ __alt_instructions_end = .;
+ }
+
INIT_DATA_SECTION(16)
.exit.data : {
EXIT_DATA
@@ -113,6 +98,11 @@ SECTIONS
_sdata = .;
RO_DATA(4096)
+
+ .got : ALIGN(16) { *(.got) }
+ .plt : ALIGN(16) { *(.plt) }
+ .got.plt : ALIGN(16) { *(.got.plt) }
+
RW_DATA(1 << CONFIG_L1_CACHE_SHIFT, PAGE_SIZE, THREAD_SIZE)
.rela.dyn : ALIGN(8) {
@@ -121,6 +111,17 @@ SECTIONS
__rela_dyn_end = .;
}
+ .data.rel : { *(.data.rel*) }
+
+#ifdef CONFIG_RELOCATABLE
+ . = ALIGN(8);
+ .la_abs : AT(ADDR(.la_abs) - LOAD_OFFSET) {
+ __la_abs_begin = .;
+ *(.la_abs)
+ __la_abs_end = .;
+ }
+#endif
+
.sdata : {
*(.sdata)
}
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-6.5/parisc-drivers-fix-sparse-warning.patch
queue-6.5/parisc-ccio-dma-fix-sparse-warnings.patch
queue-6.5/parisc-sba-iommu-fix-sparse-warnigs.patch
queue-6.5/loongarch-fix-lockdep-static-memory-detection.patch
queue-6.5/parisc-iosapic.c-fix-sparse-warnings.patch
queue-6.5/parisc-sba-fix-compile-warning-wrt-list-of-sba-devic.patch
queue-6.5/parisc-irq-make-irq_stack_union-static-to-avoid-spar.patch
