| Message ID | 9d6eaba7-92f8-4a70-8765-38a519680a87@moroto.mountain (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | fs/proc/task_mmu: fix uninitialized variable in pagemap_pmd_range() | expand |
On 13.06.24 16:34, Dan Carpenter wrote: > The "folio" pointer is tested for NULL, but it's either valid or > uninitialized. Initialize it to NULL. > > Fixes: 84f57f8b8914 ("fs/proc: move page_mapcount() to fs/proc/internal.h") > Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> > --- > fs/proc/task_mmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c > index 631371cb80a0..6ed1f56b32b4 100644 > --- a/fs/proc/task_mmu.c > +++ b/fs/proc/task_mmu.c > @@ -1492,7 +1492,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end, > u64 flags = 0, frame = 0; > pmd_t pmd = *pmdp; > struct page *page = NULL; > - struct folio *folio; > + struct folio *folio = NULL; > > if (vma->vm_flags & VM_SOFTDIRTY) > flags |= PM_SOFT_DIRTY; Acked-by: David Hildenbrand <david@redhat.com> Thanks!
On 6/13/24 7:34 PM, Dan Carpenter wrote: > The "folio" pointer is tested for NULL, but it's either valid or > uninitialized. Initialize it to NULL. > > Fixes: 84f57f8b8914 ("fs/proc: move page_mapcount() to fs/proc/internal.h") > Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> > --- > fs/proc/task_mmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c > index 631371cb80a0..6ed1f56b32b4 100644 > --- a/fs/proc/task_mmu.c > +++ b/fs/proc/task_mmu.c > @@ -1492,7 +1492,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end, > u64 flags = 0, frame = 0; > pmd_t pmd = *pmdp; > struct page *page = NULL; > - struct folio *folio; > + struct folio *folio = NULL; > > if (vma->vm_flags & VM_SOFTDIRTY) > flags |= PM_SOFT_DIRTY; Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 631371cb80a0..6ed1f56b32b4 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1492,7 +1492,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end, u64 flags = 0, frame = 0; pmd_t pmd = *pmdp; struct page *page = NULL; - struct folio *folio; + struct folio *folio = NULL; if (vma->vm_flags & VM_SOFTDIRTY) flags |= PM_SOFT_DIRTY;
The "folio" pointer is tested for NULL, but it's either valid or uninitialized. Initialize it to NULL. Fixes: 84f57f8b8914 ("fs/proc: move page_mapcount() to fs/proc/internal.h") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> --- fs/proc/task_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)