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-rw-r--r--fs/coredump.c13
-rw-r--r--include/linux/sched.h1
-rw-r--r--kernel/signal.c6
3 files changed, 10 insertions, 10 deletions
diff --git a/fs/coredump.c b/fs/coredump.c
index d52f6bd5ad8e..f91cfd8cd5f2 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -280,8 +280,8 @@ static int zap_process(struct task_struct *start, int exit_code)
return nr;
}
-static inline int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
- struct core_state *core_state, int exit_code)
+static int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
+ struct core_state *core_state, int exit_code)
{
struct task_struct *g, *p;
unsigned long flags;
@@ -291,6 +291,9 @@ static inline int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
if (!signal_group_exit(tsk->signal)) {
mm->core_state = core_state;
nr = zap_process(tsk, exit_code);
+ /* ignore all signals except SIGKILL, see prepare_signal() */
+ tsk->signal->flags |= SIGNAL_GROUP_COREDUMP;
+ clear_tsk_thread_flag(tsk, TIF_SIGPENDING);
}
spin_unlock_irq(&tsk->sighand->siglock);
if (unlikely(nr < 0))
@@ -514,12 +517,6 @@ void do_coredump(siginfo_t *siginfo)
old_cred = override_creds(cred);
- /*
- * Clear any false indication of pending signals that might
- * be seen by the filesystem code called to write the core file.
- */
- clear_thread_flag(TIF_SIGPENDING);
-
ispipe = format_corename(&cn, &cprm);
if (ispipe) {
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 54ddcb82cddf..a22baf83c20c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -626,6 +626,7 @@ struct signal_struct {
#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
#define SIGNAL_STOP_CONTINUED 0x00000002 /* SIGCONT since WCONTINUED reap */
#define SIGNAL_GROUP_EXIT 0x00000004 /* group exit in progress */
+#define SIGNAL_GROUP_COREDUMP 0x00000008 /* coredump in progress */
/*
* Pending notifications to parent.
*/
diff --git a/kernel/signal.c b/kernel/signal.c
index 27ece019bd0a..cede58910f9c 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -854,12 +854,14 @@ static void ptrace_trap_notify(struct task_struct *t)
* Returns true if the signal should be actually delivered, otherwise
* it should be dropped.
*/
-static int prepare_signal(int sig, struct task_struct *p, bool force)
+static bool prepare_signal(int sig, struct task_struct *p, bool force)
{
struct signal_struct *signal = p->signal;
struct task_struct *t;
- if (unlikely(signal->flags & SIGNAL_GROUP_EXIT)) {
+ if (signal->flags & (SIGNAL_GROUP_EXIT | SIGNAL_GROUP_COREDUMP)) {
+ if (signal->flags & SIGNAL_GROUP_COREDUMP)
+ return sig == SIGKILL;
/*
* The process is in the middle of dying, nothing to do.
*/