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Message-Id: <20240317150547.24910-1-weiguixiong@bytedance.com>
Date: Sun, 17 Mar 2024 23:05:47 +0800
From: Guixiong Wei <weiguixiong@...edance.com>
To: keescook@...omium.org,
tglx@...utronix.de
Cc: jgross@...e.com,
mingo@...hat.com,
bp@...en8.de,
dave.hansen@...ux.intel.com,
x86@...nel.org,
hpa@...or.com,
peterz@...radead.org,
gregkh@...uxfoundation.org,
tony.luck@...el.com,
adobriyan@...il.com,
linux-kernel@...r.kernel.org,
linux-hardening@...r.kernel.org,
weiguixiong@...edance.com
Subject: [PATCH] x86, relocs: Ignore relocations in .notes section on walk_relocs
The commit aaa8736370db ("x86, relocs: Ignore relocations in
notes section") only ignore .note section on print_absolute_relocs,
but it also need to add on walk_relocs to avoid relocations in .note
section.
Fixes: aaa8736370db ("x86, relocs: Ignore relocations in .notes section")
Fixes: 5ead97c84fa7 ("xen: Core Xen implementation")
Fixes: da1a679cde9b ("Add /sys/kernel/notes")
Signed-off-by: Guixiong Wei <weiguixiong@...edance.com>
---
arch/x86/tools/relocs.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index b029fb81ebee..33844b33b8b9 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -746,6 +746,16 @@ static void walk_relocs(int (*process)(struct section *sec, Elf_Rel *rel,
if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
continue;
}
+
+ /*
+ * Do not perform relocations in .notes section; any
+ * values there are meant for pre-boot consumption (e.g.
+ * startup_xen).
+ */
+ if (sec_applies->shdr.sh_type == SHT_NOTE) {
+ continue;
+ }
+
sh_symtab = sec_symtab->symtab;
sym_strtab = sec_symtab->link->strtab;
for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) {
--
2.24.3 (Apple Git-128)
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