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charset="utf-8" Check for overflow as well as allocation failure. Resolves Coverity CID 15= 64859. Signed-off-by: Paolo Bonzini Reviewed-by: Dorjoy Chowdhury Reviewed-by: Pierrick Bouvier --- 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 cbcd80de58b..25f2aedf3fa 100644 --- a/hw/core/eif.c +++ b/hw/core/eif.c @@ -123,6 +123,10 @@ 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); @@ -282,7 +286,12 @@ 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"); @@ -324,7 +333,12 @@ 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