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| author | kib <kib@FreeBSD.org> | 2009-10-30 10:10:39 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2009-10-30 10:10:39 +0000 |
| commit | f2a32c79ab8801e28a77d82b70d9621cbc93bc1e (patch) | |
| tree | 71a761f08c33278d7e27caa229231c7844e1d897 /sys/sys/signalvar.h | |
| parent | 0f387cfc4635b54215dfea282d0cc03d4012fba0 (diff) | |
| download | FreeBSD-src-f2a32c79ab8801e28a77d82b70d9621cbc93bc1e.zip FreeBSD-src-f2a32c79ab8801e28a77d82b70d9621cbc93bc1e.tar.gz | |
Trapsignal() and postsig() call kern_sigprocmask() with both process
lock and curproc->p_sigacts->ps_mtx. Reschedule_signals may need to have
ps_mtx locked to decide and wakeup a thread, causing recursion on the
mutex.
Inform kern_sigprocmask() and reschedule_signals() about lock state
of the ps_mtx by new flag SIGPROCMASK_PS_LOCKED to avoid recursion.
Reported and tested by: keramida
MFC after: 1 month
Diffstat (limited to 'sys/sys/signalvar.h')
| -rw-r--r-- | sys/sys/signalvar.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/sys/signalvar.h b/sys/sys/signalvar.h index b9a54f0..c27a128 100644 --- a/sys/sys/signalvar.h +++ b/sys/sys/signalvar.h @@ -319,6 +319,7 @@ extern int kern_logsigexit; /* Sysctl variable kern.logsigexit */ /* flags for kern_sigprocmask */ #define SIGPROCMASK_OLD 0x0001 #define SIGPROCMASK_PROC_LOCKED 0x0002 +#define SIGPROCMASK_PS_LOCKED 0x0004 /* * Machine-independent functions: |
