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Tue, 20 Jan 2026 20:12:59 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id kOOQI8vhb2nRMAAAD6G6ig (envelope-from ); Tue, 20 Jan 2026 20:12:59 +0000 From: =?UTF-8?q?Carlos=20L=C3=B3pez?= To: kvm@vger.kernel.org, seanjc@google.com, pbonzini@redhat.com Cc: pankaj.gupta@amd.com, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, =?UTF-8?q?Carlos=20L=C3=B3pez?= , Borislav Petkov Subject: [PATCH v2 3/6] KVM: SEV: use mutex guard in sev_mem_enc_register_region() Date: Tue, 20 Jan 2026 21:10:11 +0100 Message-ID: <20260120201013.3931334-6-clopez@suse.de> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260120201013.3931334-3-clopez@suse.de> References: <20260120201013.3931334-3-clopez@suse.de> 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="utf-8" Content-Transfer-Encoding: quoted-printable X-Spam-Score: -3.30 X-Spamd-Result: default: False [-3.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_TWELVE(0.00)[12]; MIME_TRACE(0.00)[0:+]; FUZZY_RATELIMITED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo] X-Spam-Level: X-Spam-Flag: NO Simplify the error paths in sev_mem_enc_register_region() by using a mutex guard, allowing early return instead of using a goto. Signed-off-by: Carlos L=C3=B3pez --- arch/x86/kvm/svm/sev.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index bede01fc9086..30f702c01caf 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2690,13 +2690,13 @@ int sev_mem_enc_register_region(struct kvm *kvm, if (!region) return -ENOMEM; =20 - mutex_lock(&kvm->lock); + guard(mutex)(&kvm->lock); region->pages =3D sev_pin_memory(kvm, range->addr, range->size, ®ion->= npages, FOLL_WRITE | FOLL_LONGTERM); if (IS_ERR(region->pages)) { ret =3D PTR_ERR(region->pages); - mutex_unlock(&kvm->lock); - goto e_free; + kfree(region); + return ret; } =20 /* @@ -2713,13 +2713,8 @@ int sev_mem_enc_register_region(struct kvm *kvm, region->size =3D range->size; =20 list_add_tail(®ion->list, &sev->regions_list); - mutex_unlock(&kvm->lock); =20 return ret; - -e_free: - kfree(region); - return ret; } =20 static struct enc_region * --=20 2.51.0