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| author | Max Filippov <jcmvbkbc@gmail.com> | 2023-07-01 03:31:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-01 08:00:05 -0700 |
| commit | 03f889378f33aa9a9d8e5f49ba94134cf6158090 (patch) | |
| tree | 0cd0a31bf1619630f179e85729e6f7fd798f88d0 | |
| parent | a507db1d8fdc39802415e4d2ef6d1aecd67927fa (diff) | |
xtensa: fix lock_mm_and_find_vma in case VMA not found
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>
| -rw-r--r-- | mm/nommu.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index fdc392735ec6..c072a660ec2c 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -637,8 +637,13 @@ 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; } /* |