4703879435
Changes: - SAM: - Clean up code - Misc: - Revert erroneous efivarfs change in v4.19.160 Links: - SAM:b97b5d8f9e
- kernel:b2de1a748f
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From 5818e8950d59deadd95d41d1d3747461a2e4df94 Mon Sep 17 00:00:00 2001
|
|
From: Ard Biesheuvel <ardb@kernel.org>
|
|
Date: Wed, 25 Nov 2020 08:53:03 +0100
|
|
Subject: [PATCH] efivarfs: revert "fix memory leak in efivarfs_create()"
|
|
|
|
The memory leak addressed by commit fe5186cf12e3 is a false positive:
|
|
all allocations are recorded in a linked list, and freed when the
|
|
filesystem is unmounted. This leads to double frees, and as reported
|
|
by David, leads to crashes if SLUB is configured to self destruct when
|
|
double frees occur.
|
|
|
|
So drop the redundant kfree() again, and instead, mark the offending
|
|
pointer variable so the allocation is ignored by kmemleak.
|
|
|
|
Cc: Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com>
|
|
Fixes: fe5186cf12e3 ("efivarfs: fix memory leak in efivarfs_create()")
|
|
Reported-by: David Laight <David.Laight@aculab.com>
|
|
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
|
|
---
|
|
fs/efivarfs/super.c | 1 -
|
|
1 file changed, 1 deletion(-)
|
|
|
|
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
|
|
index 7808a26bd33f..834615f13f3e 100644
|
|
--- a/fs/efivarfs/super.c
|
|
+++ b/fs/efivarfs/super.c
|
|
@@ -23,7 +23,6 @@ LIST_HEAD(efivarfs_list);
|
|
static void efivarfs_evict_inode(struct inode *inode)
|
|
{
|
|
clear_inode(inode);
|
|
- kfree(inode->i_private);
|
|
}
|
|
|
|
static const struct super_operations efivarfs_ops = {
|
|
--
|
|
2.29.2
|
|
|