Hello,
In Debian's bug 272683 [0] submitter describes incorrect behavior of the F_NOTIFY function of fcntl(), which reports the wrong number of the file descriptor, on which the event has occured. I believe that the culprit in this case is the copy_siginfo_to_user32() function in arch/sparc64/kernel/signal32.c. Comparison with other arches (like
ppc64), shows that the __SI_POLL branch in the case statement should fill out the si_band and si_fd fields of the siginfo_t structure (si_fd is used by fcntl() to pass the fd number back to user). Currently it does not do that. Attached patch (against 2.6.11.7) separates __SI_FAULT and __SI_POLL branches and does (presumably) the right thing in the latter by copying the si_band and si_fd into the siginfo_t passed to user. With this change the test program attached to the bug [0] works as expected (tested on 2.6.8, against which the original bug was filed).
Please review and apply if it makes sense :-).
[0] http://bugs.debian.org/272683
Best regards,
Jurij Smakov [EMAIL PROTECTED] Key: http://www.wooyd.org/pgpkey/ KeyID: C99E03CC
--- a/arch/sparc64/kernel/signal32.c 2005-04-07 14:58:42.000000000 -0400
+++ b/arch/sparc64/kernel/signal32.c 2005-04-16 03:01:00.162300632 -0400
@@ -192,10 +192,13 @@
err |= __put_user(from->si_uid, &to->si_uid);
break;
case __SI_FAULT >> 16:
- case __SI_POLL >> 16:
err |= __put_user(from->si_trapno, &to->si_trapno);
err |= __put_user((unsigned long)from->si_addr,
&to->si_addr);
break;
+ case __SI_POLL >> 16:
+ err |= __put_user(from->si_band, &to->si_band);
+ err |= __put_user(from->si_fd, &to->si_fd);
+ break;
case __SI_RT >> 16: /* This is not generated by the kernel as
of now. */
case __SI_MESGQ >> 16:
err |= __put_user(from->si_pid, &to->si_pid);
