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Date: Mon, 22 Aug 2022 22:00:37 +0600 From: Khalid Masum <khalid.masum.92@...il.com> To: Hawkins Jiawei <yin31149@...il.com>, dan.carpenter@...cle.com CC: davem@...emloft.net, dhowells@...hat.com, edumazet@...gle.com, kuba@...nel.org, linux-afs@...ts.infradead.org, linux-kernel-mentees@...ts.linuxfoundation.org, linux-kernel@...r.kernel.org, marc.dionne@...istor.com, netdev@...r.kernel.org, pabeni@...hat.com, paskripkin@...il.com, syzbot+7f0483225d0c94cb3441@...kaller.appspotmail.com, syzkaller-bugs@...glegroups.com, yin31149@...il.com Subject: Re: [PATCH] rxrpc: fix bad unlock balance in rxrpc_do_sendmsg On August 22, 2022 9:39:43 PM GMT+06:00, Hawkins Jiawei <yin31149@...il.com> wrote: >On Mon, 22 Aug 2022 at 22:06, Dan Carpenter <dan.carpenter@...cle.com> wrote: >I trid this before, it doesn't work as Dan points out. I think >it seems that mutex_is_locked() only checks whether there is a task I see. >holding the mutex, but do not check whether it is current task holding >mutex. I also tried lockdep_is_held(), lockdep_is_held() seems can detect Ok. >call->user_mutex is still held accurately, although this cannot be the patch. Useful to know! Thanks for the information. -- Khalid Masum
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