[Xen-changelog] [xen stable-4.9] xen/livepatch: Use zeroed memory allocations for arrays

[patchbot@xxxxxxx]

commit a11d14bf26e9af3dd0a659493b34e9526bf54236
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Thu Jun 22 18:55:31 2017 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Mon Jun 26 11:19:16 2017 +0100

    xen/livepatch: Use zeroed memory allocations for arrays
    
    Each of these arrays is sparse.  Use zeroed allocations to cause 
uninitialised
    array elements to contain deterministic values, most importantly for the
    embedded pointers.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
    Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> [x86 and arm32]
    Reviewed-by: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
    (cherry picked from commit bd53b85156aaf0330181ab9b82d9a6c52fb30f8c)
    Release-acked-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/common/livepatch.c     | 4 ++--
 xen/common/livepatch_elf.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/common/livepatch.c b/xen/common/livepatch.c
index df67a1a..66d532d 100644
--- a/xen/common/livepatch.c
+++ b/xen/common/livepatch.c
@@ -771,8 +771,8 @@ static int build_symbol_table(struct payload *payload,
         }
     }
 
-    symtab = xmalloc_array(struct livepatch_symbol, nsyms);
-    strtab = xmalloc_array(char, strtab_len);
+    symtab = xzalloc_array(struct livepatch_symbol, nsyms);
+    strtab = xzalloc_array(char, strtab_len);
 
     if ( !strtab || !symtab )
     {
diff --git a/xen/common/livepatch_elf.c b/xen/common/livepatch_elf.c
index c4a9633..b69e271 100644
--- a/xen/common/livepatch_elf.c
+++ b/xen/common/livepatch_elf.c
@@ -52,7 +52,7 @@ static int elf_resolve_sections(struct livepatch_elf *elf, 
const void *data)
     int rc;
 
     /* livepatch_elf_load sanity checked e_shnum. */
-    sec = xmalloc_array(struct livepatch_elf_sec, elf->hdr->e_shnum);
+    sec = xzalloc_array(struct livepatch_elf_sec, elf->hdr->e_shnum);
     if ( !sec )
     {
         dprintk(XENLOG_ERR, LIVEPATCH"%s: Could not allocate memory for 
section table!\n",
@@ -225,7 +225,7 @@ static int elf_get_sym(struct livepatch_elf *elf, const 
void *data)
     /* No need to check values as elf_resolve_sections did it. */
     nsym = symtab_sec->sec->sh_size / symtab_sec->sec->sh_entsize;
 
-    sym = xmalloc_array(struct livepatch_elf_sym, nsym);
+    sym = xzalloc_array(struct livepatch_elf_sym, nsym);
     if ( !sym )
     {
         dprintk(XENLOG_ERR, LIVEPATCH "%s: Could not allocate memory for 
symbols\n",
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.9

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