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libc/stream: Check lowout bounds before access

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Check the provided length before reading the current lowoutstream byte. This avoids reading past zero-length or fully consumed buffers before the loop condition stops.

Generated-by: OpenAI Codex
Signed-off-by: Old-Ding <35417409+Old-Ding@users.noreply.github.com>
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Old-Ding 2026-07-06 09:11:16 +08:00 • committed by Alin Jerpelea
parent 0b37b86d68
commit bab2b4a5f2
1 changed files with 1 additions and 1 deletions
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2
libs/libc/stream/lib_lowoutstream.c
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@ -86,7 +86,7 @@ static ssize_t lowoutstream_puts(FAR struct lib_outstream_s *self,
size_t idx = 0;
DEBUGASSERT(self);
while (str[idx] != 0 && idx < len)
while (idx < len && str[idx] != 0)
{
lowoutstream_putc(self, str[idx]);
idx++;