Commit-ID: cfac6dfa42bddfa9711b20d486e521d1a41ab09f Gitweb: http://git.kernel.org/tip/cfac6dfa42bddfa9711b20d486e521d1a41ab09f Author: Joerg Roedel <[email protected]> AuthorDate: Tue, 4 Apr 2017 18:15:01 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Wed, 5 Apr 2017 10:16:43 +0200
x86/signals: Fix lower/upper bound reporting in compat siginfo Put the right values from the original siginfo into the userspace compat-siginfo. This fixes the 32-bit MPX "tabletest" testcase on 64-bit kernels. Signed-off-by: Joerg Roedel <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: <[email protected]> # v4.8+ Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Dmitry Safonov <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Fixes: a4455082dc6f0 ('x86/signals: Add missing signal_compat code for x86 features') Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/kernel/signal_compat.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c index ec1f756..71beb28 100644 --- a/arch/x86/kernel/signal_compat.c +++ b/arch/x86/kernel/signal_compat.c @@ -151,8 +151,8 @@ int __copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from, if (from->si_signo == SIGSEGV) { if (from->si_code == SEGV_BNDERR) { - compat_uptr_t lower = (unsigned long)&to->si_lower; - compat_uptr_t upper = (unsigned long)&to->si_upper; + compat_uptr_t lower = (unsigned long)from->si_lower; + compat_uptr_t upper = (unsigned long)from->si_upper; put_user_ex(lower, &to->si_lower); put_user_ex(upper, &to->si_upper); }
