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Fri, 08 Nov 2024 09:38:42 -0800 (PST) X-Google-Smtp-Source: AGHT+IHjZBCpKV8EvP6UY4bia8y8dsG6cswhaoAsM7kqVutlF2kYfFPjAPlUoQXWfwKLsN9b107XgQ== X-Received: by 2002:a05:600c:4f12:b0:431:5503:43ca with SMTP id 5b1f17b1804b1-432b751f53cmr28912315e9.28.1731087521791; Fri, 08 Nov 2024 09:38:41 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Pierrick Bouvier , Dorjoy Chowdhury Subject: [PULL 06/13] eif: cope with huge section sizes Date: Fri, 8 Nov 2024 18:38:21 +0100 Message-ID: <20241108173828.111454-7-pbonzini@redhat.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241108173828.111454-1-pbonzini@redhat.com> References: <20241108173828.111454-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.34, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1731087615639116600 Content-Type: text/plain; charset="utf-8" Check for overflow as well as allocation failure. Resolves Coverity CID 15= 64859. Reviewed-by: Pierrick Bouvier Reviewed-by: Dorjoy Chowdhury Signed-off-by: Paolo Bonzini --- hw/core/eif.c | 48 +++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 41 insertions(+), 7 deletions(-) diff --git a/hw/core/eif.c b/hw/core/eif.c index 61329aacfe1..7a8c657f23a 100644 --- a/hw/core/eif.c +++ b/hw/core/eif.c @@ -119,6 +119,10 @@ static bool read_eif_header(FILE *f, EifHeader *header= , uint32_t *crc, =20 for (int i =3D 0; i < MAX_SECTIONS; ++i) { header->section_sizes[i] =3D be64_to_cpu(header->section_sizes[i]); + if (header->section_sizes[i] > SSIZE_MAX) { + error_setg(errp, "Invalid EIF image. Section size out of bound= s"); + return false; + } } =20 header->unused =3D be32_to_cpu(header->unused); @@ -278,7 +282,12 @@ static bool get_signature_fingerprint_sha384(FILE *eif= , uint64_t size, struct cbor_load_result result; bool ret =3D false; =20 - sig =3D g_malloc(size); + sig =3D g_try_malloc(size); + if (!sig) { + error_setg(errp, "Out of memory reading signature section"); + goto cleanup; + } + got =3D fread(sig, 1, size, eif); if ((uint64_t) got !=3D size) { error_setg(errp, "Failed to read EIF signature section data"); @@ -320,7 +329,12 @@ static bool get_signature_fingerprint_sha384(FILE *eif= , uint64_t size, error_setg(errp, "Invalid signature CBOR"); goto cleanup; } - cert =3D g_malloc(len); + cert =3D g_try_malloc(len); + if (!cert) { + error_setg(errp, "Out of memory reading signature section"); + goto cleanup; + } + for (int i =3D 0; i < len; ++i) { cbor_item_t *tmp =3D cbor_array_get(pair->value, i); if (!tmp) { @@ -503,7 +517,11 @@ bool read_eif_file(const char *eif_path, const char *m= achine_initrd, goto cleanup; } =20 - ptr =3D g_malloc(hdr.section_size); + ptr =3D g_try_malloc(hdr.section_size); + if (!ptr) { + error_setg(errp, "Out of memory reading kernel section"); + goto cleanup; + } =20 iov_ptr =3D g_malloc(sizeof(struct iovec)); iov_ptr->iov_base =3D ptr; @@ -528,7 +546,11 @@ bool read_eif_file(const char *eif_path, const char *m= achine_initrd, goto cleanup; } size =3D hdr.section_size; - *cmdline =3D g_malloc(size + 1); + *cmdline =3D g_try_malloc(size + 1); + if (!cmdline) { + error_setg(errp, "Out of memory reading command line secti= on"); + goto cleanup; + } if (!read_eif_cmdline(f, size, *cmdline, &crc, errp)) { goto cleanup; } @@ -567,7 +589,11 @@ bool read_eif_file(const char *eif_path, const char *m= achine_initrd, } } =20 - ptr =3D g_malloc(hdr.section_size); + ptr =3D g_try_malloc(hdr.section_size); + if (!ptr) { + error_setg(errp, "Out of memory reading initrd section"); + goto cleanup; + } =20 iov_ptr =3D g_malloc(sizeof(struct iovec)); iov_ptr->iov_base =3D ptr; @@ -606,7 +632,11 @@ bool read_eif_file(const char *eif_path, const char *m= achine_initrd, uint8_t *buf; size_t got; uint64_t size =3D hdr.section_size; - buf =3D g_malloc(size); + buf =3D g_try_malloc(size); + if (!buf) { + error_setg(errp, "Out of memory reading unknown section"); + goto cleanup; + } got =3D fread(buf, 1, size, f); if ((uint64_t) got !=3D size) { g_free(buf); @@ -662,7 +692,11 @@ bool read_eif_file(const char *eif_path, const char *m= achine_initrd, goto cleanup; } =20 - ptr =3D g_malloc(machine_initrd_size); + ptr =3D g_try_malloc(machine_initrd_size); + if (!ptr) { + error_setg(errp, "Out of memory reading initrd file"); + goto cleanup; + } =20 iov_ptr =3D g_malloc(sizeof(struct iovec)); iov_ptr->iov_base =3D ptr; --=20 2.47.0