Merge tag 'v4.19.47' into v4.19-rt

This is the 4.19.47 stable release

 Conflicts:
	drivers/char/random.c
	kernel/irq_work.c

 Issues with kernel/irq/manage.c
  A use after free bug was fixed in stable. But it requires a backport of changes
  from rt-devel. The bug still exists in this tree for PREEMPT_RT, but will be
  fixed when backporting the rt-devel patches.

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 84afe55625f8..5d0c975559ad 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -131,6 +131,13 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long sp,
 	struct task_struct *tsk;
 	int err;
 
+	/*
+	 * For a new task use the RESET flags value since there is no before.
+	 * All the status flags are zero; DF and all the system flags must also
+	 * be 0, specifically IF must be 0 because we context switch to the new
+	 * task with interrupts disabled.
+	 */
+	frame->flags = X86_EFLAGS_FIXED;
 	frame->bp = 0;
 	frame->ret_addr = (unsigned long) ret_from_fork;
 	p->thread.sp = (unsigned long) fork_frame;