X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=kernel%2Frelay.c;h=4c035a8a248c2bfabea85bfd616c9562fcf4f440;hb=0d995b2b446c2304c04058bedba49460823adbf7;hp=d080b9d161a75eee95bbf6d7aed235354bda9e9c;hpb=f0e2dcffae8701f00b34bce90e762eb798dea5b1;p=mirror_ubuntu-zesty-kernel.git

diff --git a/kernel/relay.c b/kernel/relay.c
index d080b9d161a7..4c035a8a248c 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1066,7 +1066,7 @@ static int subbuf_splice_actor(struct file *in,
 			       unsigned int flags,
 			       int *nonpad_ret)
 {
-	unsigned int pidx, poff, total_len, subbuf_pages, ret;
+	unsigned int pidx, poff, total_len, subbuf_pages, nr_pages, ret;
 	struct rchan_buf *rbuf = in->private_data;
 	unsigned int subbuf_size = rbuf->chan->subbuf_size;
 	uint64_t pos = (uint64_t) *ppos;
@@ -1097,8 +1097,9 @@ static int subbuf_splice_actor(struct file *in,
 	subbuf_pages = rbuf->chan->alloc_size >> PAGE_SHIFT;
 	pidx = (read_start / PAGE_SIZE) % subbuf_pages;
 	poff = read_start & ~PAGE_MASK;
+	nr_pages = min_t(unsigned int, subbuf_pages, PIPE_BUFFERS);
 
-	for (total_len = 0; spd.nr_pages < subbuf_pages; spd.nr_pages++) {
+	for (total_len = 0; spd.nr_pages < nr_pages; spd.nr_pages++) {
 		unsigned int this_len, this_end, private;
 		unsigned int cur_pos = read_start + total_len;