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From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+2d7d0fbb5fb979113ff3@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_remove
Date: Thu,  7 Aug 2025 22:15:43 +0800	[thread overview]
Message-ID: <tencent_12A5C08DB79240DDA95D9119784FA08DAC07@qq.com> (raw)
In-Reply-To: <6890f71a.050a0220.7f033.0010.GAE@google.com>

#syz test

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 9692fa4c3ef2..0d69572fe1ce 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -4443,8 +4443,11 @@ struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag_set *set,
 {
 	struct request_queue *q;
 	struct gendisk *disk;
+	unsigned int nofs_flag;
 
+	nofs_flag = memalloc_nofs_save();
 	q = blk_mq_alloc_queue(set, lim, queuedata);
+	memalloc_nofs_restore(nofs_flag);
 	if (IS_ERR(q))
 		return ERR_CAST(q);
 


  parent reply	other threads:[~2025-08-07 14:22 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-04 18:08 syzbot
2025-08-05  2:27 ` Hillf Danton
2025-08-05  3:02   ` syzbot
2025-08-07 11:41 ` Edward Adam Davis
2025-08-07 14:02   ` syzbot
2025-08-07 14:15 ` Edward Adam Davis [this message]
2025-08-07 14:45   ` syzbot
2025-10-28 15:04 ` syzbot

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