NothingOSS/android_kernel_msm-6.1_nothing_sm7635
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xtensa: fix lock_mm_and_find_vma in case VMA not found

Browse source 
commit 03f889378f33aa9a9d8e5f49ba94134cf6158090 upstream.

MMU version of lock_mm_and_find_vma releases the mm lock before
returning when VMA is not found. Do the same in noMMU version.
This fixes hang on an attempt to handle protection fault.

Fixes: d85a143b69ab ("xtensa: fix NOMMU build with lock_mm_and_find_vma() conversion")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Max Filippov 2023-07-01 03:31:55 -07:00 • committed by Greg Kroah-Hartman
parent 0f4ac6b4c5
commit 6b2849b3e0
1 changed files with 6 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

7
mm/nommu.c
View file

@ -688,8 +688,13 @@ EXPORT_SYMBOL(find_vma);
struct vm_area_struct *lock_mm_and_find_vma(struct mm_struct *mm,
unsigned long addr, struct pt_regs *regs)
{
struct vm_area_struct *vma;
mmap_read_lock(mm);
return vma_lookup(mm, addr);
vma = vma_lookup(mm, addr);
if (!vma)
mmap_read_unlock(mm);
return vma;
}
/*