diff mbox series

[22/28] powerpc: procfs: Propagate error of remap_pfn_range()

Message ID 20241010-vdso-generic-base-v1-22-b64f0842d512@linutronix.de (mailing list archive)
State Handled Elsewhere
Headers show
Series vdso: Preparations for generic data storage | expand

Commit Message

Thomas Weißschuh Oct. 10, 2024, 7:01 a.m. UTC 
If the operation fails and userspace is unaware it will access unmapped
memory, crashing the process.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 arch/powerpc/kernel/proc_powerpc.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c
index b109cd7b5d01fbe6870b60e60965effa86ecf3b6..910d2082e05fd86bd1146815d4b67633a6f2b459 100644
--- a/arch/powerpc/kernel/proc_powerpc.c
+++ b/arch/powerpc/kernel/proc_powerpc.c
@@ -33,10 +33,9 @@  static int page_map_mmap( struct file *file, struct vm_area_struct *vma )
 	if ((vma->vm_end - vma->vm_start) > PAGE_SIZE)
 		return -EINVAL;
 
-	remap_pfn_range(vma, vma->vm_start,
-			__pa(pde_data(file_inode(file))) >> PAGE_SHIFT,
-			PAGE_SIZE, vma->vm_page_prot);
-	return 0;
+	return remap_pfn_range(vma, vma->vm_start,
+			       __pa(pde_data(file_inode(file))) >> PAGE_SHIFT,
+			       PAGE_SIZE, vma->vm_page_prot);
 }
 
 static const struct proc_ops page_map_proc_ops = {