From: Michael Straube <straube.linux@gmail.com>
Date: Mon, 8 Nov 2021 10:55:37 +0000 (+0100)
Subject: staging: r8188eu: use GFP_ATOMIC under spinlock
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=788fa64fa8de1052b295d7101060a71e74cdc904;p=linux.git

staging: r8188eu: use GFP_ATOMIC under spinlock

commit 4a293eaf92a510ff688dc7b3f0815221f99c9d1b upstream.

In function rtw_report_sec_ie() kzalloc() is called under a spinlock,
so the allocation have to be atomic.

Call tree:

-> rtw_select_and_join_from_scanned_queue() <- takes a spinlock
   -> rtw_joinbss_cmd()
      -> rtw_restruct_sec_ie()
         -> rtw_report_sec_ie()

Fixes: 2b42bd58b321 ("staging: r8188eu: introduce new os_dep dir for RTL8188eu driver")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20211108105537.31655-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/r8188eu/os_dep/mlme_linux.c b/drivers/staging/r8188eu/os_dep/mlme_linux.c
index e3ee9dc7ab900..b0d1e20edc4c2 100644
--- a/drivers/staging/r8188eu/os_dep/mlme_linux.c
+++ b/drivers/staging/r8188eu/os_dep/mlme_linux.c
@@ -114,7 +114,7 @@ void rtw_report_sec_ie(struct adapter *adapter, u8 authmode, u8 *sec_ie)
 
 	buff = NULL;
 	if (authmode == _WPA_IE_ID_) {
-		buff = kzalloc(IW_CUSTOM_MAX, GFP_KERNEL);
+		buff = kzalloc(IW_CUSTOM_MAX, GFP_ATOMIC);
 		if (!buff)
 			return;
 		p = buff;