From 7e7be31bfdb066c1c780dcd6b1224078fc54063f Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 29 Apr 2026 15:29:38 -0700 Subject: [PATCH] net: tls: fix silent data drop under pipe back-pressure tls_sw_splice_read() uses len when advancing rxm->offset / rxm->full_len after skb_splice_bits(), rather than copied (the actual number of bytes successfully spliced into the pipe). When the destination pipe cannot accept all the requested bytes, splice_to_pipe() returns fewer bytes than len, and 'len - copied' of data is effectively skipped over. Fixes: e062fe99cccd ("tls: splice_read: fix accessing pre-processed records") Link: https://patch.msgid.link/20260429222944.2139041-2-kuba@kernel.org Signed-off-by: Jakub Kicinski --- net/tls/tls_sw.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 798243eabb1f..2590e855f6a5 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -2317,9 +2317,9 @@ ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, if (copied < 0) goto splice_requeue; - if (chunk < rxm->full_len) { - rxm->offset += len; - rxm->full_len -= len; + if (copied < rxm->full_len) { + rxm->offset += copied; + rxm->full_len -= copied; goto splice_requeue; }