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X-CSE-ConnectionGUID: NLiP/h42T+axTpT8ZZYyKw== X-CSE-MsgGUID: ebz6XvMaQq65YJQX7YFcCw== X-IronPort-AV: E=McAfee;i="6800,10657,11889"; a="88648712" X-IronPort-AV: E=Sophos;i="6.25,248,1779174000"; d="scan'208";a="88648712" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Aug 2026 08:45:13 -0700 X-CSE-ConnectionGUID: ktkROrMOT+KLwjalPUsyag== X-CSE-MsgGUID: sDIX/640RzOLCN7lCTUGJg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,248,1779174000"; d="scan'208";a="268228672" Received: from aschofie-mobl2.amr.corp.intel.com (HELO spandruv-desk1.amr.corp.intel.com) ([10.124.223.143]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Aug 2026 08:45:12 -0700 Message-ID: <42d7b3ad68ed7870e141fcfa62a483356e7c5b7f.camel@linux.intel.com> Subject: Re: [BUG] ish_hw_start -- page fault on a PIO cookie: intel_ish_ipc maps an I/O BAR and dereferences it From: srinivas pandruvada To: Farhad Alemi , Jiri Kosina , Benjamin Tissoires , Zhang Lixu Cc: falemi@asu.edu, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Date: Fri, 28 Aug 2026 08:45:11 -0700 In-Reply-To: References: Autocrypt: addr=srinivas.pandruvada@linux.intel.com; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Farhad, On Thu, 2026-08-27 at 22:36 -0700, Farhad Alemi wrote: > Hello, >=20 > As part of the kernel research at ASU's SEFCOM > lab, we hit the crash below. Crash reports can be found here: >=20 > =C2=A0 > https://github.com/farhad-alemi/public_bug_reports/tree/main/152-hid-inte= l-ish-ioport-bar-deref/ >=20 > =C2=A0 BUG: unable to handle page fault for address: 000000000001c078 > =C2=A0 #PF: supervisor read access in kernel mode > =C2=A0 #PF: error_code(0x0000) - not-present page > =C2=A0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI > =C2=A0 RIP: 0010:ish_hw_start+0x41/0x2d0 > =C2=A0 Call Trace: > =C2=A0=C2=A0 > =C2=A0=C2=A0 ish_probe+0x34d/0x460 > =C2=A0=C2=A0 pci_device_probe+0x436/0xc90 > =C2=A0=C2=A0 really_probe+0x267/0xaf0 > =C2=A0=C2=A0 __driver_probe_device+0x1e2/0x350 > =C2=A0=C2=A0 driver_probe_device+0x4f/0x240 > =C2=A0=C2=A0 __device_attach_driver+0x270/0x410 > =C2=A0=C2=A0 bus_for_each_drv+0x258/0x2f0 > =C2=A0=C2=A0 __device_attach+0x2c5/0x450 > =C2=A0=C2=A0 drivers_probe_store+0x11c/0x220 >=20 > Our reproducer.c is available upon request. >=20 > Happy to test a patch if that would help. Thanks for reporting. Please submit a patch. https://www.kernel.org/doc/html/v4.17/process/submitting-patches.html Thanks, Srinivas >=20 > Regards,