[xen staging] tools/9pfsd: add missing va_end() in fill_data()

[patchbot@xxxxxxx]

commit bb1619ed4f2edcc7140b6a130b42a553da78fa10
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Thu Feb 22 11:51:56 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Feb 22 11:51:56 2024 +0100

    tools/9pfsd: add missing va_end() in fill_data()
    
    In xen-9pfsd fill_data() va_end() needs to be called before returning.
    
    Coverity Id CID 1592145
    
    Fixes: bcec59cf7ff4 ("tools/xen-9pfsd: add 9pfs version request support")
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/9pfsd/io.c | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/tools/9pfsd/io.c b/tools/9pfsd/io.c
index ebc4102713..adb887c7d9 100644
--- a/tools/9pfsd/io.c
+++ b/tools/9pfsd/io.c
@@ -445,7 +445,7 @@ static int fill_data(struct ring *ring, const char *fmt, 
...)
             if ( !*f || array_sz )
                 fmt_err(fmt);
             if ( !chk_data(ring, data, sizeof(uint16_t)) )
-                return pars;
+                goto out;
             array_sz = get_unaligned((uint16_t *)data);
             data += sizeof(uint16_t);
             *(unsigned int *)par = array_sz;
@@ -455,10 +455,10 @@ static int fill_data(struct ring *ring, const char *fmt, 
...)
 
         case 'b':
             if ( !chk_data(ring, data, sizeof(uint8_t)) )
-                return pars;
+                goto out;
             if ( !fill_data_elem(&par, array, &array_sz, sizeof(uint8_t),
                                  data) )
-                return pars;
+                goto out;
             data += sizeof(uint8_t);
             break;
 
@@ -466,48 +466,48 @@ static int fill_data(struct ring *ring, const char *fmt, 
...)
             if ( array_sz )
                 fmt_err(fmt);
             if ( !chk_data(ring, data, sizeof(uint32_t)) )
-                return pars;
+                goto out;
             len = get_unaligned((uint32_t *)data);
             data += sizeof(uint32_t);
             *(unsigned int *)par = len;
             par = va_arg(ap, void *);
             if ( !chk_data(ring, data, len) )
-                return pars;
+                goto out;
             memcpy(par, data, len);
             data += len;
             break;
 
         case 'L':
             if ( !chk_data(ring, data, sizeof(uint64_t)) )
-                return pars;
+                goto out;
             if ( !fill_data_elem(&par, array, &array_sz, sizeof(uint64_t),
                                  data) )
-                return pars;
+                goto out;
             data += sizeof(uint64_t);
             break;
 
         case 'S':
             if ( !chk_data(ring, data, sizeof(uint16_t)) )
-                return pars;
+                goto out;
             len = get_unaligned((uint16_t *)data);
             data += sizeof(uint16_t);
             if ( !chk_data(ring, data, len) )
-                return pars;
+                goto out;
             str_off = add_string(ring, data, len);
             if ( str_off == ~0 )
-                return pars;
+                goto out;
             if ( !fill_data_elem(&par, array, &array_sz, sizeof(unsigned int),
                                  &str_off) )
-                return pars;
+                goto out;
             data += len;
             break;
 
         case 'U':
             if ( !chk_data(ring, data, sizeof(uint32_t)) )
-                return pars;
+                goto out;
             if ( !fill_data_elem(&par, array, &array_sz, sizeof(uint32_t),
                                  data) )
-                return pars;
+                goto out;
             data += sizeof(uint32_t);
             break;
 
@@ -520,6 +520,9 @@ static int fill_data(struct ring *ring, const char *fmt, 
...)
         pars++;
     }
 
+ out:
+    va_end(ap);
+
     return pars;
 }
 
--
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