30 lines
1.3 KiB
Diff
30 lines
1.3 KiB
Diff
|
commit 350db2839387659e1500a54d276e401c9c6b2dee
|
||
|
|
Author: Michael Jeanson <mjeanson@efficios.com>
|
||
|
|
Date: Wed Nov 20 14:15:42 2024 -0500
|
||
|
|
|
||
|
|
nptl: initialize cpu_id_start prior to rseq registration
|
||
|
|
|
||
|
|
When adding explicit initialization of rseq fields prior to
|
||
|
|
registration, I glossed over the fact that 'cpu_id_start' is also
|
||
|
|
documented as initialized by user-space.
|
||
|
|
|
||
|
|
While current kernels don't validate the content of this field on
|
||
|
|
registration, future ones could.
|
||
|
|
|
||
|
|
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
|
||
|
|
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
|
||
|
|
(cherry picked from commit d9f40387d3305d97e30a8cf8724218c42a63680a)
|
||
|
|
|
||
|
|
diff --git a/sysdeps/unix/sysv/linux/rseq-internal.h b/sysdeps/unix/sysv/linux/rseq-internal.h
|
||
|
|
index 37a8f630b6519ff0..ef3eab1fefd4d90d 100644
|
||
|
|
--- a/sysdeps/unix/sysv/linux/rseq-internal.h
|
||
|
|
+++ b/sysdeps/unix/sysv/linux/rseq-internal.h
|
||
|
|
@@ -56,6 +56,7 @@ rseq_register_current_thread (struct pthread *self, bool do_rseq)
|
||
|
|
registration, there is no guarantee that struct pthread is
|
||
|
|
cleared on all architectures. */
|
||
|
|
THREAD_SETMEM (self, rseq_area.cpu_id, RSEQ_CPU_ID_UNINITIALIZED);
|
||
|
|
+ THREAD_SETMEM (self, rseq_area.cpu_id_start, 0);
|
||
|
|
THREAD_SETMEM (self, rseq_area.rseq_cs, 0);
|
||
|
|
THREAD_SETMEM (self, rseq_area.flags, 0);
|
||
|
|
|