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From: Michael Bommarito <michael.bommarito@gmail.com>
To: Gao Xiang <xiang@kernel.org>, Sasha Levin <sashal@kernel.org>
Cc: stable@vger.kernel.org, Chao Yu <chao@kernel.org>,
	linux-erofs@lists.ozlabs.org
Subject: Re: Patch "erofs: remove fscache backend entirely" has been added to the 6.18-stable tree
Date: Tue, 13 Oct 2026 07:10:11 -0400	[thread overview]
Message-ID: <20261013111011.2814836-1-michael.bommarito@gmail.com> (raw)
In-Reply-To: <as3drCZLoTUPS_oC@XiangdeMacBook-Pro.local>

For context, the original bug I found can hit both 100% deterministic
local DoS and a textbook UAF on kmalloc-128 slab that requires timing,
but I don't think an LPE can be ruled out...

Since it is reachable by an ordinary read() on Nydus or others that
enabled ondemand in Kconfig, I think it is worth thinking about what to
do for all of the pre-deprecation users (even if it's just comms).

I would defer to Gao, but I sent a minimal fix in June that can
close the UAF without any other breaking changes.

Thanks,
Michael Bommarito

  parent reply	other threads:[~2026-10-13 11:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20261013020044.2527207-1-sashal@kernel.org>
2026-10-13  7:28 ` Patch "erofs: remove fscache backend entirely" has been added to the 6.18-stable tree Gao Xiang
2026-10-13  7:59   ` Greg KH
2026-10-13  8:16     ` Gao Xiang
2026-10-13 10:37       ` Greg KH
2026-10-13 11:30         ` Gao Xiang
2026-10-13 11:10   ` Michael Bommarito [this message]
2026-10-13 11:22     ` Gao Xiang

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