Merge branch 'perf-tools-next' of https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git

1 files changed, 13 insertions, 4 deletions

diff --git a/tools/lib/api/fd/array.c b/tools/lib/api/fd/array.c
index f0f195207fca..67b73481df27 100644
--- a/tools/lib/api/fd/array.c
+++ b/tools/lib/api/fd/array.c
@@ -31,7 +31,8 @@ int fdarray__grow(struct fdarray *fda, int nr)
 
 	priv = realloc(fda->priv, psize);
 	if (priv == NULL) {
-		free(entries);
+		/* this will be freed by fdarray__exit() */
+		fda->entries = entries;
 		return -ENOMEM;
 	}
 
@@ -50,7 +51,7 @@ struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow)
 
 	if (fda != NULL) {
 		if (fdarray__grow(fda, nr_alloc)) {
-			free(fda);
+			fdarray__delete(fda);
 			fda = NULL;
 		} else {
 			fda->nr_autogrow = nr_autogrow;
@@ -115,6 +116,9 @@ int fdarray__filter(struct fdarray *fda, short revents,
 		return 0;
 
 	for (fd = 0; fd < fda->nr; ++fd) {
+		if (fda->priv[fd].flags & fdarray_flag__nonfilterable)
+			continue;
+
 		if (!fda->entries[fd].events)
 			continue;
 
@@ -122,12 +126,17 @@ int fdarray__filter(struct fdarray *fda, short revents,
 			if (entry_destructor)
 				entry_destructor(fda, fd, arg);
 
+			/*
+			 * Set fd to -1 so poll() ignores this entry; otherwise
+			 * POLLHUP/POLLERR are still reported for events=0 fds
+			 * (POSIX: always checked), causing a poll storm.
+			 */
+			fda->entries[fd].fd = -1;
 			fda->entries[fd].revents = fda->entries[fd].events = 0;
 			continue;
 		}
 
-		if (!(fda->priv[fd].flags & fdarray_flag__nonfilterable))
-			++nr;
+		++nr;
 	}
 
 	return nr;