x86: user_regset_view table fix for ia32 on 64-bit

The user_regset_view table for the 32-bit regsets on the 64-bit build had
the wrong sizes for the FP regsets.  This bug had no user-visible effect
(just on kernel modules using the user_regset interfaces and the like).
But the fix is trivial and risk-free.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index fb03ef380f0e..a7835f282936 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -1303,6 +1303,9 @@ static const struct user_regset_view user_x86_64_view = {
 #define genregs32_get           genregs_get
 #define genregs32_set           genregs_set
 
+#define user_i387_ia32_struct   user_i387_struct
+#define user32_fxsr_struct      user_fxsr_struct
+
 #endif  /* CONFIG_X86_64 */
 
 #if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
@@ -1315,13 +1318,13 @@ static const struct user_regset x86_32_regsets[] = {
         },
         [REGSET_FP] = {
                 .core_note_type = NT_PRFPREG,
-                .n = sizeof(struct user_i387_struct) / sizeof(u32),
+                .n = sizeof(struct user_i387_ia32_struct) / sizeof(u32),
                 .size = sizeof(u32), .align = sizeof(u32),
                 .active = fpregs_active, .get = fpregs_get, .set = fpregs_set
         },
         [REGSET_XFP] = {
                 .core_note_type = NT_PRXFPREG,
-                .n = sizeof(struct user_i387_struct) / sizeof(u32),
+                .n = sizeof(struct user32_fxsr_struct) / sizeof(u32),
                 .size = sizeof(u32), .align = sizeof(u32),
                 .active = xfpregs_active, .get = xfpregs_get, .set = xfpregs_set
         },