mm: vmalloc: fix uninitialized value issue

Issues reported by LKP:
  mm/vmalloc.c:191 vmap_pmd_range() error: uninitialized symbol 'err'.
  mm/vmalloc.c:243 vmap_pud_range() error: uninitialized symbol 'err'.
  mm/vmalloc.c:295 vmap_p4d_range() error: uninitialized symbol 'err'.

Fix by initailizing err with 0.

Link: https://lkml.kernel.org/r/20251014102337.5453-1-yadong.qi@linux.alibaba.com
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202510110050.VG9YKMRK-lkp@intel.com/
Signed-off-by: Yadong Qi <yadong.qi@linux.alibaba.com>
Cc: Huang Ying <ying.huang@linux.alibaba.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 3f06bdbc37e29a4894fb96e8a0a2ac1e16d615bc..dcc95931ea9ded5cc63e235fa304408e169fca0a 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -170,7 +170,7 @@ static int vmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long end,
 {
        pmd_t *pmd;
        unsigned long next;
-       int err;
+       int err = 0;
 
        pmd = pmd_alloc_track(&init_mm, pud, addr, mask);
        if (!pmd)
@@ -222,7 +222,7 @@ static int vmap_pud_range(p4d_t *p4d, unsigned long addr, unsigned long end,
 {
        pud_t *pud;
        unsigned long next;
-       int err;
+       int err = 0;
 
        pud = pud_alloc_track(&init_mm, p4d, addr, mask);
        if (!pud)
@@ -274,7 +274,7 @@ static int vmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end,
 {
        p4d_t *p4d;
        unsigned long next;
-       int err;
+       int err = 0;
 
        p4d = p4d_alloc_track(&init_mm, pgd, addr, mask);
        if (!p4d)