The following commit has been merged into the timers/vdso branch of tip:
Commit-ID: 17c84d6b817a37030a815006d30b66d14e260674
Gitweb: https://git.kernel.org/tip/17c84d6b817a37030a815006d30b66d14e260674
Author: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
AuthorDate: Thu, 10 Oct 2024 09:01:24 +02:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Sat, 02 Nov 2024 11:05:15 +01:00
powerpc/procfs: Propagate error of remap_pfn_range()
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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241010-vdso-generic-base-v1-22-b64f0842d512@linutronix.de
---
arch/powerpc/kernel/proc_powerpc.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c
index b109cd7..910d208 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 = {