[Xen-changelog] [xen master] xen: Add missing va_end() in hypercall_create_continuation()

[patchbot@xxxxxxx]

commit df7a19338a892b5cf585fd2bee8584cb15e0cace
Author:     Julien Grall <julien@xxxxxxx>
AuthorDate: Wed Nov 20 13:37:51 2019 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Nov 21 15:50:01 2019 +0000

    xen: Add missing va_end() in hypercall_create_continuation()
    
    The documentation requires va_start() to always be matched with a
    corresponding va_end(). However, this is not the case in the path used
    for bad format.
    
    This was introduced by XSA-296.
    
    Coverity-ID: 1488727
    Fixes: 0bf9f8d3e3 ("xen/hypercall: Don't use BUG() for parameter checking 
in hypercall_create_continuation()")
    Signed-off-by: Julien Grall <julien@xxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Release-acked-by: Juergen Gross <jgross@xxxxxxxx>
---
 xen/arch/arm/domain.c    | 1 +
 xen/arch/x86/hypercall.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index 9e8e9d921d..c0a13aa0ab 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -467,6 +467,7 @@ unsigned long hypercall_create_continuation(
     return rc;
 
  bad_fmt:
+    va_end(args);
     gprintk(XENLOG_ERR, "Bad hypercall continuation format '%c'\n", *p);
     ASSERT_UNREACHABLE();
     domain_crash(current->domain);
diff --git a/xen/arch/x86/hypercall.c b/xen/arch/x86/hypercall.c
index 4643e5eb43..1d42702c6a 100644
--- a/xen/arch/x86/hypercall.c
+++ b/xen/arch/x86/hypercall.c
@@ -157,6 +157,7 @@ unsigned long hypercall_create_continuation(
     return op;
 
  bad_fmt:
+    va_end(args);
     gprintk(XENLOG_ERR, "Bad hypercall continuation format '%c'\n", *p);
     ASSERT_UNREACHABLE();
     domain_crash(curr->domain);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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