From: Dave Hansen <dave.hansen@intel.com>
To: syzbot <syzbot+49b1021becba70c1f3f6@syzkaller.appspotmail.com>,
bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com,
peterz@infradead.org, syzkaller-bugs@googlegroups.com,
tglx@kernel.org, x86@kernel.org
Subject: Re: [syzbot] [kernel?] WARNING in __ioremap_caller
Date: Fri, 4 Sep 2026 16:20:17 -0700 [thread overview]
Message-ID: <a1b85e8b-cae0-4737-9d77-bec1866839c4@intel.com> (raw)
In-Reply-To: <6a9b3ff8.04649fcc.10325f.0005.GAE@google.com>
On 9/4/26 15:02, syzbot wrote:
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a09215580000
Heh, that's a fun reproducer as usual. Looks like it's mmap()'ing some
PCI device resource the accessing the mmap() with /proc/$pid/mem. The
thing that's weird is how a PCI device resource ends up pointing at
system RAM.
/proc/iomem might be enlightening as would 'lspci -vvv'. But it makes me
wonder if the PCI device enumeration inside the VM is broken or something.
prev parent reply other threads:[~2026-09-04 23:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-22 11:33 syzbot
2026-09-04 22:02 ` syzbot
2026-09-04 23:20 ` Dave Hansen [this message]
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