We pass a kernel pointer to do_sigaltstack in sys32_sigaltstack, so

we need to do the set_fs(KERNEL_DS) thing around this call.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index e8c380dceb86..5e7d0fa02672 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -488,6 +488,7 @@ __attribute_used__ noinline static void
 _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
         struct rt_sigframe32 *frame;
+        mm_segment_t old_fs;
         sigset_t set;
         stack_t st;
         s32 sp;
@@ -518,7 +519,10 @@ _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 
         /* It is more difficult to avoid calling this function than to
            call it and ignore errors.  */
+        old_fs = get_fs();
+        set_fs (KERNEL_DS);
         do_sigaltstack(&st, NULL, regs.regs[29]);
+        set_fs (old_fs);
 
         /*
          * Don't let your children do this ...