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-rw-r--r--tools/libxc/xc_cpuid_x86.c20
-rw-r--r--tools/libxc/xc_dom_core.c13
-rw-r--r--tools/libxc/xc_dom_elfloader.c2
-rw-r--r--tools/libxc/xc_dom_ia64.c6
-rw-r--r--tools/libxc/xc_dom_x86.c3
-rw-r--r--tools/libxc/xc_domain_restore.c5
-rw-r--r--tools/libxc/xc_flask.c2
-rw-r--r--tools/libxc/xc_linux_osdep.c4
-rw-r--r--tools/libxc/xc_private.c2
-rw-r--r--tools/libxc/xenctrl.h2
10 files changed, 56 insertions, 3 deletions
diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
index f61308a196..5adf2d9fca 100644
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -515,6 +515,8 @@ static int xc_cpuid_do_domctl(
static char *alloc_str(void)
{
char *s = malloc(33);
+ if ( s == NULL )
+ return s;
memset(s, 0, 33);
return s;
}
@@ -526,6 +528,8 @@ void xc_cpuid_to_str(const unsigned int *regs, char **strs)
for ( i = 0; i < 4; i++ )
{
strs[i] = alloc_str();
+ if ( strs[i] == NULL )
+ continue;
for ( j = 0; j < 32; j++ )
strs[i][j] = !!((regs[i] & (1U << (31 - j)))) ? '1' : '0';
}
@@ -599,7 +603,7 @@ int xc_cpuid_check(
const char **config,
char **config_transformed)
{
- int i, j;
+ int i, j, rc;
unsigned int regs[4];
memset(config_transformed, 0, 4 * sizeof(*config_transformed));
@@ -611,6 +615,11 @@ int xc_cpuid_check(
if ( config[i] == NULL )
continue;
config_transformed[i] = alloc_str();
+ if ( config_transformed[i] == NULL )
+ {
+ rc = -ENOMEM;
+ goto fail_rc;
+ }
for ( j = 0; j < 32; j++ )
{
unsigned char val = !!((regs[i] & (1U << (31 - j))));
@@ -627,12 +636,14 @@ int xc_cpuid_check(
return 0;
fail:
+ rc = -EPERM;
+ fail_rc:
for ( i = 0; i < 4; i++ )
{
free(config_transformed[i]);
config_transformed[i] = NULL;
}
- return -EPERM;
+ return rc;
}
/*
@@ -677,6 +688,11 @@ int xc_cpuid_set(
}
config_transformed[i] = alloc_str();
+ if ( config_transformed[i] == NULL )
+ {
+ rc = -ENOMEM;
+ goto fail;
+ }
for ( j = 0; j < 32; j++ )
{
diff --git a/tools/libxc/xc_dom_core.c b/tools/libxc/xc_dom_core.c
index a54ddae3d3..3cbf9f791e 100644
--- a/tools/libxc/xc_dom_core.c
+++ b/tools/libxc/xc_dom_core.c
@@ -120,9 +120,17 @@ void *xc_dom_malloc(struct xc_dom_image *dom, size_t size)
{
struct xc_dom_mem *block;
+ if ( size > SIZE_MAX - sizeof(*block) )
+ {
+ DOMPRINTF("%s: unreasonable allocation size", __FUNCTION__);
+ return NULL;
+ }
block = malloc(sizeof(*block) + size);
if ( block == NULL )
+ {
+ DOMPRINTF("%s: allocation failed", __FUNCTION__);
return NULL;
+ }
memset(block, 0, sizeof(*block) + size);
block->next = dom->memblocks;
dom->memblocks = block;
@@ -138,7 +146,10 @@ void *xc_dom_malloc_page_aligned(struct xc_dom_image *dom, size_t size)
block = malloc(sizeof(*block));
if ( block == NULL )
+ {
+ DOMPRINTF("%s: allocation failed", __FUNCTION__);
return NULL;
+ }
memset(block, 0, sizeof(*block));
block->mmap_len = size;
block->mmap_ptr = mmap(NULL, block->mmap_len,
@@ -146,6 +157,7 @@ void *xc_dom_malloc_page_aligned(struct xc_dom_image *dom, size_t size)
-1, 0);
if ( block->mmap_ptr == MAP_FAILED )
{
+ DOMPRINTF("%s: mmap failed", __FUNCTION__);
free(block);
return NULL;
}
@@ -202,6 +214,7 @@ void *xc_dom_malloc_filemap(struct xc_dom_image *dom,
close(fd);
if ( block != NULL )
free(block);
+ DOMPRINTF("%s: failed (on file `%s')", __FUNCTION__, filename);
return NULL;
}
diff --git a/tools/libxc/xc_dom_elfloader.c b/tools/libxc/xc_dom_elfloader.c
index aa6b5f0546..0fb3629e59 100644
--- a/tools/libxc/xc_dom_elfloader.c
+++ b/tools/libxc/xc_dom_elfloader.c
@@ -329,6 +329,8 @@ static elf_errorstatus xc_dom_parse_elf_kernel(struct xc_dom_image *dom)
return rc;
elf = xc_dom_malloc(dom, sizeof(*elf));
+ if ( elf == NULL )
+ return -1;
dom->private_loader = elf;
rc = elf_init(elf, dom->kernel_blob, dom->kernel_size);
xc_elf_set_logfile(dom->xch, elf, 1);
diff --git a/tools/libxc/xc_dom_ia64.c b/tools/libxc/xc_dom_ia64.c
index 7c0eff15d8..076821c19d 100644
--- a/tools/libxc/xc_dom_ia64.c
+++ b/tools/libxc/xc_dom_ia64.c
@@ -188,6 +188,12 @@ int arch_setup_meminit(struct xc_dom_image *dom)
/* setup initial p2m */
dom->p2m_host = xc_dom_malloc(dom, sizeof(xen_pfn_t) * nbr);
+ if ( dom->p2m_host == NULL )
+ {
+ DOMPRINTF("%s: xc_dom_malloc failed for p2m_host",
+ __FUNCTION__);
+ return -1;
+ }
for ( pfn = 0; pfn < nbr; pfn++ )
dom->p2m_host[pfn] = start + pfn;
diff --git a/tools/libxc/xc_dom_x86.c b/tools/libxc/xc_dom_x86.c
index 75d6b8336c..448d9a1e74 100644
--- a/tools/libxc/xc_dom_x86.c
+++ b/tools/libxc/xc_dom_x86.c
@@ -780,6 +780,9 @@ int arch_setup_meminit(struct xc_dom_image *dom)
}
dom->p2m_host = xc_dom_malloc(dom, sizeof(xen_pfn_t) * dom->total_pages);
+ if ( dom->p2m_host == NULL )
+ return -EINVAL;
+
if ( dom->superpages )
{
int count = dom->total_pages >> SUPERPAGE_PFN_SHIFT;
diff --git a/tools/libxc/xc_domain_restore.c b/tools/libxc/xc_domain_restore.c
index 29af52bac6..0f1e2d16c1 100644
--- a/tools/libxc/xc_domain_restore.c
+++ b/tools/libxc/xc_domain_restore.c
@@ -967,6 +967,11 @@ static int apply_batch(xc_interface *xch, uint32_t dom, struct restore_ctx *ctx,
/* Map relevant mfns */
pfn_err = calloc(j, sizeof(*pfn_err));
+ if ( pfn_err == NULL )
+ {
+ PERROR("allocation for pfn_err failed");
+ return -1;
+ }
region_base = xc_map_foreign_bulk(
xch, dom, PROT_WRITE, region_mfn, pfn_err, j);
diff --git a/tools/libxc/xc_flask.c b/tools/libxc/xc_flask.c
index 27794a82d5..78c243c9e0 100644
--- a/tools/libxc/xc_flask.c
+++ b/tools/libxc/xc_flask.c
@@ -284,6 +284,8 @@ int xc_flask_access(xc_interface *xc_handle, const char *scon, const char *tcon,
MAX_SHORT_DEC_LEN + 1 +
sizeof(req)*2 + 1;
buf = malloc(bufLen);
+ if ( buf == NULL )
+ return -ENOMEM;
snprintf(buf, bufLen, "%s %s %hu %x", scon, tcon, tclass, req);
op.cmd = FLASK_ACCESS;
diff --git a/tools/libxc/xc_linux_osdep.c b/tools/libxc/xc_linux_osdep.c
index 6477ad8607..fa7bb7c14c 100644
--- a/tools/libxc/xc_linux_osdep.c
+++ b/tools/libxc/xc_linux_osdep.c
@@ -294,6 +294,8 @@ static void *linux_privcmd_map_foreign_range(xc_interface *xch, xc_osdep_handle
num = (size + XC_PAGE_SIZE - 1) >> XC_PAGE_SHIFT;
arr = calloc(num, sizeof(xen_pfn_t));
+ if ( arr == NULL )
+ return NULL;
for ( i = 0; i < num; i++ )
arr[i] = mfn + i;
@@ -318,6 +320,8 @@ static void *linux_privcmd_map_foreign_ranges(xc_interface *xch, xc_osdep_handle
num_per_entry = chunksize >> XC_PAGE_SHIFT;
num = num_per_entry * nentries;
arr = calloc(num, sizeof(xen_pfn_t));
+ if ( arr == NULL )
+ return NULL;
for ( i = 0; i < nentries; i++ )
for ( j = 0; j < num_per_entry; j++ )
diff --git a/tools/libxc/xc_private.c b/tools/libxc/xc_private.c
index 09c8f23ca5..1bf25d2a1e 100644
--- a/tools/libxc/xc_private.c
+++ b/tools/libxc/xc_private.c
@@ -742,6 +742,8 @@ const char *xc_strerror(xc_interface *xch, int errcode)
errbuf = pthread_getspecific(errbuf_pkey);
if (errbuf == NULL) {
errbuf = malloc(XS_BUFSIZE);
+ if ( errbuf == NULL )
+ return "(failed to allocate errbuf)";
pthread_setspecific(errbuf_pkey, errbuf);
}
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
index 570c6d46b5..9bc9172376 100644
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -1608,7 +1608,7 @@ int xc_cpuid_set(xc_interface *xch,
int xc_cpuid_apply_policy(xc_interface *xch,
domid_t domid);
void xc_cpuid_to_str(const unsigned int *regs,
- char **strs);
+ char **strs); /* some strs[] may be NULL if ENOMEM */
int xc_mca_op(xc_interface *xch, struct xen_mc *mc);
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 15:55:26 +0000