[patch 15/50] x86: user_regset_view table fix for ia32 on 64-bit

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Roland McGrath <roland@xxxxxxxxxx>

commit 1f465f4e475454b8bb590846c50a9d16e8046f3d upstream

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@xxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

---
 arch/x86/kernel/ptrace.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -1382,6 +1382,9 @@ static const struct user_regset_view use
 #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
@@ -1394,13 +1397,13 @@ static const struct user_regset x86_32_r
 	},
 	[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
 	},

-- 
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