[lvc-project] [PATCH] [RFC] dma-buf: fix race condition between poll and close

[Fedor Pchelkin]

On Fri, 03. May 14:08, Dmitry Antipov wrote:
> On 5/3/24 11:18 AM, Christian König wrote:
> 
> > Attached is a compile only tested patch, please verify if it fixes your problem.
> 
> LGTM, and this is similar to get_file() in __pollwait() and fput() in
> free_poll_entry() used in implementation of poll(). Please resubmit to
> linux-fsdevel@ including the following:
> 
> Reported-by: syzbot+5d4cb6b4409edfd18646 at syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=5d4cb6b4409edfd18646
> Tested-by: Dmitry Antipov <dmantipov at yandex.ru>

I guess the problem is addressed by commit 4efaa5acf0a1 ("epoll: be better
about file lifetimes") which was pushed upstream just before v6.9-rc7.

Link: https://lore.kernel.org/lkml/0000000000002d631f0615918f1e@google.com/