diff mbox series

[v3,4/5] x86/elf: Make loading of 32bit processes depend on ia32_enabled()

Message ID 20230616125730.1164989-5-nik.borisov@suse.com
State New
Headers
Series Make IA32_EMULATION boot time overridable |

Commit Message

Nikolay Borisov June 16, 2023, 12:57 p.m. UTC 
  Major aspect of ia32 emulation is the ability to load 32bit processes.
That's currently decided (among others) by compat_elf_check_arch().

Make this macro also consider the runtime state of ia32 emulation before
allowing to load a 32bit process.

Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
---
 arch/x86/include/asm/elf.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 18fd06f7936a..a0234dfd1031 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -7,6 +7,7 @@ 
  */
 #include <linux/thread_info.h>
 
+#include <asm/ia32.h>
 #include <asm/ptrace.h>
 #include <asm/user.h>
 #include <asm/auxvec.h>
@@ -149,7 +150,7 @@  do {						\
 	((x)->e_machine == EM_X86_64)
 
 #define compat_elf_check_arch(x)					\
-	(elf_check_arch_ia32(x) ||					\
+	((elf_check_arch_ia32(x) && ia32_enabled()) ||			\
 	 (IS_ENABLED(CONFIG_X86_X32_ABI) && (x)->e_machine == EM_X86_64))
 
 static inline void elf_common_init(struct thread_struct *t,