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net: tls: fix silent data drop under pipe back-pressure

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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: e062fe99cc ("tls: splice_read: fix accessing pre-processed records")
Link: https://patch.msgid.link/20260429222944.2139041-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2026-04-29 15:29:38 -07:00
parent b42f68cf04
commit 7e7be31bfd
1 changed files with 3 additions and 3 deletions
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6
net/tls/tls_sw.c
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@ -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;
}