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Message-Id: <905bb5a8bc3e969ef332dd604864ba67b93e1a85.1758789532.git.xiaopei01@kylinos.cn> Date: Thu, 25 Sep 2025 16:41:09 +0800 From: Pei Xiao <xiaopei01@...inos.cn> To: syzbot+62edf7e27b2e8f754525@...kaller.appspotmail.com Cc: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, Pei Xiao <xiaopei01@...inos.cn> Subject: [PATCH] KMSAN: uninit-value in n_tty_receive_buf_closing #syz test --- drivers/tty/tty_buffer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index 67271fc0b223..62d32556a24b 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -108,6 +108,7 @@ static void tty_buffer_reset(struct tty_buffer *p, size_t size) p->lookahead = 0; p->read = 0; p->flags = true; + memset(p->data, 0, size); } /** @@ -177,7 +178,7 @@ static struct tty_buffer *tty_buffer_alloc(struct tty_port *port, size_t size) */ if (atomic_read(&port->buf.mem_used) > port->buf.mem_limit) return NULL; - p = kmalloc(struct_size(p, data, 2 * size), GFP_ATOMIC | __GFP_NOWARN); + p = kzalloc(struct_size(p, data, 2 * size), GFP_ATOMIC | __GFP_NOWARN); if (p == NULL) return NULL; -- 2.25.1
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