This is a note to let you know that I've just added the patch titled
kcm: fix /proc memory leak
to the 4.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kcm-fix-proc-memory-leak.patch
and it can be found in the queue-4.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Jul 6 16:50:56 PDT 2016
From: Jiri Slaby <jslaby@xxxxxxx>
Date: Mon, 20 Jun 2016 11:36:28 +0200
Subject: kcm: fix /proc memory leak
From: Jiri Slaby <jslaby@xxxxxxx>
[ Upstream commit d19af0a76444fde629667ecb823c0ee28f9f67d8 ]
Every open of /proc/net/kcm leaks 16 bytes of memory as is reported by
kmemleak:
unreferenced object 0xffff88059c0e3458 (size 192):
comm "cat", pid 1401, jiffies 4294935742 (age 310.720s)
hex dump (first 32 bytes):
28 45 71 96 05 88 ff ff 00 10 00 00 00 00 00 00 (Eq.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8156a2de>] kmem_cache_alloc_trace+0x16e/0x230
[<ffffffff8162a479>] seq_open+0x79/0x1d0
[<ffffffffa0578510>] kcm_seq_open+0x0/0x30 [kcm]
[<ffffffff8162a479>] seq_open+0x79/0x1d0
[<ffffffff8162a8cf>] __seq_open_private+0x2f/0xa0
[<ffffffff81712548>] seq_open_net+0x38/0xa0
...
It is caused by a missing free in the ->release path. So fix it by
providing seq_release_net as the ->release method.
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Fixes: cd6e111bf5 (kcm: Add statistics and proc interfaces)
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Tom Herbert <tom@xxxxxxxxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/kcm/kcmproc.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/kcm/kcmproc.c
+++ b/net/kcm/kcmproc.c
@@ -241,6 +241,7 @@ static const struct file_operations kcm_
.open = kcm_seq_open,
.read = seq_read,
.llseek = seq_lseek,
+ .release = seq_release_net,
};
static struct kcm_seq_muxinfo kcm_seq_muxinfo = {
Patches currently in stable-queue which might be from jslaby@xxxxxxx are
queue-4.6/kcm-fix-proc-memory-leak.patch
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