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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-22 08:37:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-22 08:37:23 +0100 |
| commit | 99ba2ad1db623df79456b8556b3f4900f394c8c2 (patch) | |
| tree | 2bf6a20de87f0a5b944fd69d53723fc4710d7b7e /mm/nommu.c | |
| parent | 18e126e97c961f7a93823795c879d7c085fe5098 (diff) | |
| parent | 2241ab53cbb5cdb08a6b2d4688feb13971058f65 (diff) | |
| download | lwn-99ba2ad1db623df79456b8556b3f4900f394c8c2.tar.gz lwn-99ba2ad1db623df79456b8556b3f4900f394c8c2.zip | |
Merge 6.2-rc5 into char-misc-next
We need the char/misc driver fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 214c70e1d059..5b83938ecb67 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -559,7 +559,6 @@ void vma_mas_remove(struct vm_area_struct *vma, struct ma_state *mas) static void setup_vma_to_mm(struct vm_area_struct *vma, struct mm_struct *mm) { - mm->map_count++; vma->vm_mm = mm; /* add the VMA to the mapping */ @@ -587,6 +586,7 @@ static void mas_add_vma_to_mm(struct ma_state *mas, struct mm_struct *mm, BUG_ON(!vma->vm_region); setup_vma_to_mm(vma, mm); + mm->map_count++; /* add the VMA to the tree */ vma_mas_store(vma, mas); @@ -1240,6 +1240,7 @@ share: error_just_free: up_write(&nommu_region_sem); error: + mas_destroy(&mas); if (region->vm_file) fput(region->vm_file); kmem_cache_free(vm_region_jar, region); @@ -1250,7 +1251,6 @@ error: sharing_violation: up_write(&nommu_region_sem); - mas_destroy(&mas); pr_warn("Attempt to share mismatched mappings\n"); ret = -EINVAL; goto error; @@ -1347,6 +1347,7 @@ int split_vma(struct mm_struct *mm, struct vm_area_struct *vma, if (vma->vm_file) return -ENOMEM; + mm = vma->vm_mm; if (mm->map_count >= sysctl_max_map_count) return -ENOMEM; @@ -1398,6 +1399,7 @@ int split_vma(struct mm_struct *mm, struct vm_area_struct *vma, mas_set_range(&mas, vma->vm_start, vma->vm_end - 1); mas_store(&mas, vma); vma_mas_store(new, &mas); + mm->map_count++; return 0; err_mas_preallocate: @@ -1509,7 +1511,8 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len, struct list erase_whole_vma: if (delete_vma_from_mm(vma)) ret = -ENOMEM; - delete_vma(mm, vma); + else + delete_vma(mm, vma); return ret; } |