From: Christian Brauner <brauner@kernel.org>
To: Lu Jialin <lujialin4@huawei.com>
Cc: Christian Brauner <brauner@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Suren Baghdasaryan <surenb@google.com>,
Oleg Nesterov <oleg@redhat.com>,
Eric Biggers <ebiggers@google.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v2] poll: Fix use-after-free in poll_freewait()
Date: Wed, 14 Jun 2023 09:57:25 +0200 [thread overview]
Message-ID: <20230614-tapir-zellkern-69406a55c08f@brauner> (raw)
In-Reply-To: <20230614070733.113068-1-lujialin4@huawei.com>
On Wed, 14 Jun 2023 15:07:33 +0800, Lu Jialin wrote:
> We found a UAF bug in remove_wait_queue as follows:
>
> ==================================================================
> BUG: KASAN: use-after-free in _raw_spin_lock_irqsave+0x71/0xe0
> Write of size 4 at addr ffff8881150d7b28 by task psi_trigger/15306
> Call Trace:
> dump_stack+0x9c/0xd3
> print_address_description.constprop.0+0x19/0x170
> __kasan_report.cold+0x6c/0x84
> kasan_report+0x3a/0x50
> check_memory_region+0xfd/0x1f0
> _raw_spin_lock_irqsave+0x71/0xe0
> remove_wait_queue+0x26/0xc0
> poll_freewait+0x6b/0x120
> do_sys_poll+0x305/0x400
> do_syscall_64+0x33/0x40
> entry_SYSCALL_64_after_hwframe+0x61/0xc6
>
> [...]
Applied to the vfs.misc branch of the vfs/vfs.git tree.
Patches in the vfs.misc branch should appear in linux-next soon.
Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.
It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.misc
[1/1] poll: Fix use-after-free in poll_freewait()
https://git.kernel.org/vfs/vfs/c/e5f00a6f63bc
next prev parent reply other threads:[~2023-06-14 7:57 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 7:07 [PATCH v2] poll: Fix use-after-free in poll_freewait() Lu Jialin
2023-06-14 7:57 ` Christian Brauner [this message]
2023-06-14 17:40 ` Eric Biggers
2023-06-14 18:19 ` Suren Baghdasaryan
2023-06-15 23:13 ` Suren Baghdasaryan
2023-06-18 13:28 ` lujialin (A)
2023-06-21 0:09 ` Suren Baghdasaryan
2023-06-24 1:58 ` Suren Baghdasaryan
2023-06-26 20:22 ` Suren Baghdasaryan
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