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-rw-r--r--fs/splice.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/splice.c b/fs/splice.c
index 4d6df083e0c0..f5094b6d00a0 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -739,6 +739,9 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
sd.pos = kiocb.ki_pos;
if (ret <= 0)
break;
+ WARN_ONCE(ret > sd.total_len - left,
+ "Splice Exceeded! ret=%zd tot=%zu left=%zu\n",
+ ret, sd.total_len, left);
sd.num_spliced += ret;
sd.total_len -= ret;