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Tue, 15 Oct 2024 16:43:27 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org Cc: borntraeger@de.ibm.com, nsg@linux.ibm.com, nrb@linux.ibm.com, frankja@linux.ibm.com, seiden@linux.ibm.com, hca@linux.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com, gerald.schaefer@linux.ibm.com, kvm@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v3 04/11] s390/mm/gmap: Fix __gmap_fault() return code Date: Tue, 15 Oct 2024 18:43:19 +0200 Message-ID: <20241015164326.124987-5-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015164326.124987-1-imbrenda@linux.ibm.com> References: <20241015164326.124987-1-imbrenda@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 6KGM_ShUI_rpT1Nt2Dbmnp8f0fq4cdyD X-Proofpoint-ORIG-GUID: 6KGM_ShUI_rpT1Nt2Dbmnp8f0fq4cdyD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 suspectscore=0 phishscore=0 impostorscore=0 mlxscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 mlxlogscore=896 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410150113 Content-Type: text/plain; charset="utf-8" Errors in fixup_user_fault() were masked and -EFAULT was returned for any error, including out of memory. Fix this by returning the correct error code. This means that in many cases the error code will be propagated all the way to userspace. Suggested-by: Heiko Carstens Signed-off-by: Claudio Imbrenda Reviewed-by: Heiko Carstens Acked-by: Alexander Gordeev --- arch/s390/mm/gmap.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index f51ad948ba53..a8746f71c679 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -718,13 +718,12 @@ static int __gmap_fault(struct gmap *gmap, unsigned l= ong gaddr, unsigned int fau if (IS_ERR_VALUE(vmaddr)) return vmaddr; =20 - if (fault_flags & FAULT_FLAG_RETRY_NOWAIT) { + if (fault_flags & FAULT_FLAG_RETRY_NOWAIT) rc =3D fixup_user_fault_nowait(gmap->mm, vmaddr, fault_flags, &unlocked); - if (rc) - return rc; - } else if (fixup_user_fault(gmap->mm, vmaddr, fault_flags, &unlocked)) { - return -EFAULT; - } + else + rc =3D fixup_user_fault(gmap->mm, vmaddr, fault_flags, &unlocked); + if (rc) + return rc; /* * In the case that fixup_user_fault unlocked the mmap_lock during * fault-in, redo __gmap_translate() to avoid racing with a --=20 2.47.0