-From 8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b Mon Sep 17 00:00:00 2001
-From: Eric Sandeen <sandeen@redhat.com>
-Date: Tue, 13 Jul 2021 17:49:23 +0200
-Subject: seq_file: disallow extremely large seq buffer allocations
-
-There is no reasonable need for a buffer larger than this, and it avoids
-int overflow pitfalls.
-
-Fixes: 058504edd026 ("fs/seq_file: fallback to vmalloc allocation")
-Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
-Reported-by: Qualys Security Advisory <qsa@qualys.com>
-Signed-off-by: Eric Sandeen <sandeen@redhat.com>
-Cc: stable@kernel.org
-Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
----
- fs/seq_file.c | 3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/fs/seq_file.c b/fs/seq_file.c
-index b117b212ef288..4a2cda04d3e29 100644
---- a/fs/seq_file.c
-+++ b/fs/seq_file.c
-@@ -32,6 +32,9 @@ static void seq_set_overflow(struct seq_file *m)
-
- static void *seq_buf_alloc(unsigned long size)
- {
-+ if (unlikely(size > MAX_RW_COUNT))
-+ return NULL;
-+
- return kvmalloc(size, GFP_KERNEL_ACCOUNT);
- }
-
---
-cgit 1.2.3-1.el7