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Tue, 2 Jan 2024 15:09:28 +0000 (GMT) Date: Tue, 2 Jan 2024 16:09:26 +0100 From: Heiko Carstens To: Ilya Leoshkevich Cc: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka , Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle Subject: Re: [PATCH v3 32/34] s390/unwind: Disable KMSAN checks Message-ID: <20240102150926.6306-I-hca@linux.ibm.com> References: <20231213233605.661251-1-iii@linux.ibm.com> <20231213233605.661251-33-iii@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231213233605.661251-33-iii@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: exHf4oBJB85XIi_IDJ_Zx4a73A6HiVoO X-Proofpoint-ORIG-GUID: 2sCBYVkslnYpbOQdpV7tqP0ZF1S161uX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-02_04,2024-01-02_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=425 lowpriorityscore=0 spamscore=0 mlxscore=0 impostorscore=0 phishscore=0 adultscore=0 clxscore=1015 suspectscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401020116 On Thu, Dec 14, 2023 at 12:24:52AM +0100, Ilya Leoshkevich wrote: > The unwind code can read uninitialized frames. Furthermore, even in > the good case, KMSAN does not emit shadow for backchains. Therefore > disable it for the unwinding functions. > > Reviewed-by: Alexander Potapenko > Signed-off-by: Ilya Leoshkevich > --- > arch/s390/kernel/unwind_bc.c | 4 ++++ > 1 file changed, 4 insertions(+) Acked-by: Heiko Carstens