patch-2.4.0-test1 linux/arch/alpha/kernel/signal.c
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- Lines: 46
- Date:
Wed May 24 18:38:26 2000
- Orig file:
v2.3.99-pre9/linux/arch/alpha/kernel/signal.c
- Orig date:
Thu Mar 2 14:36:22 2000
diff -u --recursive --new-file v2.3.99-pre9/linux/arch/alpha/kernel/signal.c linux/arch/alpha/kernel/signal.c
@@ -36,6 +36,36 @@
struct switch_stack *, unsigned long, unsigned long);
+int copy_siginfo_to_user(siginfo_t *to, siginfo_t *from)
+{
+ if (!access_ok (VERIFY_WRITE, to, sizeof(siginfo_t)))
+ return -EFAULT;
+ if (from->si_code < 0)
+ return __copy_to_user(to, from, sizeof(siginfo_t));
+ else {
+ int err;
+
+ /* If you change siginfo_t structure, please be sure
+ this code is fixed accordingly.
+ It should never copy any pad contained in the structure
+ to avoid security leaks, but must copy the generic
+ 3 ints plus the relevant union member. */
+ err = __put_user(*(long *)&from->si_signo, (long *)&to->si_signo);
+ err |= __put_user((short)from->si_code, &to->si_code);
+ switch (from->si_code >> 16) {
+ case __SI_CHLD >> 16:
+ err |= __put_user(from->si_utime, &to->si_utime);
+ err |= __put_user(from->si_stime, &to->si_stime);
+ err |= __put_user(from->si_status, &to->si_status);
+ default:
+ err |= __put_user(from->si_addr, &to->si_addr);
+ break;
+ /* case __SI_RT: This is not generated by the kernel as of now. */
+ }
+ return err;
+ }
+}
+
/*
* The OSF/1 sigprocmask calling sequence is different from the
* C sigprocmask() sequence..
@@ -489,7 +519,7 @@
if (verify_area(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
- err |= __copy_to_user(&frame->info, info, sizeof(siginfo_t));
+ err |= copy_siginfo_to_user(&frame->info, info);
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
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