proc: do mmput ASAP for /proc/*/map_files

mm_struct is not needed while printing as all the data was already extracted. Link: http://lkml.kernel.org/r/20180309223120.GC3843@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Reviewed-by: Andrew Morton <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> (cherry picked from commit fbb8a8d973147842fc4a0b2e691f7afbca0d9b6a) (cherry picked from commit 5b61645c63a6fa31644f966db5b7888e5a27a0bc) (cherry picked from commit 18d7bee7ed301d563d7f922af492a5aa162ccc94) (cherry picked from commit 6392f9c911fbd6ff6643280d01f832d82267fba4) (cherry picked from commit 59d6046e40b9ff451b258594ea636b3ce01c20fb) (cherry picked from commit e44ec91bab8e85dc0cca17eb49c332030a2fc6cc) (cherry picked from commit ad4724d5d7ee54cfd6994f3b160c495514583952) (cherry picked from commit 376ab4f3aa76365f719b7962dfdfc6180da6614a)
PainKiller3 · Apr 8, 2021 · 208f10b · 208f10b
1 parent b5cc1c8
commit 208f10b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/proc/base.c b/fs/proc/base.c
@@ -2427,6 +2427,7 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 		}
 	}
 	up_read(&mm->mmap_sem);
+	mmput(mm);
 
 	for (i = 0; i < nr_files; i++) {
 		p = flex_array_get(fa, i);
@@ -2440,7 +2441,6 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 	}
 	if (fa)
 		flex_array_free(fa);
-	mmput(mm);
 
 out_put_task:
 	put_task_struct(task);