[Qemu-devel] [PATCH 1/1] Fix do_rt_sigreturn on m68k linux userspace emulation

[Michael Karcher <karcher@physik.fu-berlin.de>]

do_rt_sigreturn forgets to initialize the signal mask variable before
trying to use it to restore the mask, so the signal mask is undefined
after do_rt_sigreturn. This bug has been in all the time since
7181155d when do_rt_sigreturn was implemented for m68k.
---
 linux-user/signal.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index e03ed60..ae1014b 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -5260,11 +5260,14 @@ long do_rt_sigreturn(CPUM68KState *env)
     abi_ulong frame_addr = env->aregs[7] - 4;
     target_sigset_t target_set;
     sigset_t set;
-    int d0;
+    int d0, i;
 
     if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
         goto badframe;
 
+    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+        target_set.sig[i] = frame->uc.tuc_sigmask.sig[i];
+    }
     target_to_host_sigset_internal(&set, &target_set);
     do_sigprocmask(SIG_SETMASK, &set, NULL);
 
-- 
2.1.4