[PATCH 05/11] seq_file: Handle ->next error in seq_read

[Andi Kleen]

From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

When ->next fails the error would not be returned to user space.
Add the missing check.

Cc: viro@xxxxxxxxxxxxxxxxxx
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
 fs/seq_file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 3135c25..e16b4a8 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -262,6 +262,8 @@ Fill:
 		pos = next;
 	}
 	m->op->stop(m, p);
+	if (err)
+		goto Done;
 	n = min(m->count, size);
 	err = copy_to_user(buf, m->buf, n);
 	if (err)
-- 
1.8.3.1

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