VisionFive2 Linux kernel

author: Eric Sandeen <sandeen@redhat.com> 2021-07-13 17:49:23 +0200 committer: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2021-07-20 16:00:42 +0200 commit: 71de462034c69525a5049fbdf3903c5833cbce04 parent: 31cf8e7e504eb91f697bb19c4175a53e5cbb4b2c

Commit Summary:

seq_file: disallow extremely large seq buffer allocations

Diffstat:

1 file changed, 3 insertions, 0 deletions

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 5059248f2d64..d6aacbac793a 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);
 }