linux-kernel - Re: [syzbot] printk debug

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Date:   Thu, 23 Nov 2023 11:08:37 -0800
From:   syzbot <syzbot+83763e624cfec6b462cb@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] printk debug

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.

***

Subject: printk debug
Author: yuran.pereira@...mail.com

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

---
 drivers/staging/rtl8712/rtl871x_xmit.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/rtl8712/rtl871x_xmit.c b/drivers/staging/rtl8712/rtl871x_xmit.c
index 6353dbe554d3..c80c60417d5c 100644
--- a/drivers/staging/rtl8712/rtl871x_xmit.c
+++ b/drivers/staging/rtl8712/rtl871x_xmit.c
@@ -125,6 +125,7 @@ int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
 			      ((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
 	pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 	for (i = 0; i < NR_XMITBUFF; i++) {
+		pr_info("==> Allocating pallocated_buf %d\n", i);
 		INIT_LIST_HEAD(&pxmitbuf->list);
 		pxmitbuf->pallocated_buf =
 			kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ, GFP_ATOMIC);
@@ -188,6 +189,7 @@ void _free_xmit_priv(struct xmit_priv *pxmitpriv)
 		pxmitframe++;
 	}
 	for (i = 0; i < NR_XMITBUFF; i++) {
+		pr_info("==> Freeing pallocated_buf %d\n", i);
 		r8712_xmit_resource_free(padapter, pxmitbuf);
 		kfree(pxmitbuf->pallocated_buf);
 		pxmitbuf++;
-- 
2.25.1