+ kasan-fix-memory-leak-of-kasan-quarantine.patch added to -mm tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The patch titled
     Subject: kasan: fix memory leak of kasan quarantine
has been added to the -mm tree.  Its filename is
     kasan-fix-memory-leak-of-kasan-quarantine.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kasan-fix-memory-leak-of-kasan-quarantine.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kasan-fix-memory-leak-of-kasan-quarantine.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
Subject: kasan: fix memory leak of kasan quarantine

When cpu is going offline, set q->offline as true and interrupt happened. 
The interrupt may call the quarantine_put.  But quarantine_put do not free
the the object.  The object will cause memory leak.

Add qlink_free() to free the object.

Link: https://lkml.kernel.org/r/1608207487-30537-2-git-send-email-Kuan-Ying.Lee@xxxxxxxxxxxx
Fixes: 6c82d45c7f03 (kasan: fix object remaining in offline per-cpu quarantine)
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>    [5.10-]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/kasan/quarantine.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/kasan/quarantine.c~kasan-fix-memory-leak-of-kasan-quarantine
+++ a/mm/kasan/quarantine.c
@@ -191,6 +191,7 @@ void quarantine_put(struct kasan_free_me
 
 	q = this_cpu_ptr(&cpu_quarantine);
 	if (q->offline) {
+		qlink_free(&info->quarantine_link, cache);
 		local_irq_restore(flags);
 		return;
 	}
_

Patches currently in -mm which might be from Kuan-Ying.Lee@xxxxxxxxxxxx are

kasan-fix-memory-leak-of-kasan-quarantine.patch




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux