This is a note to let you know that I've just added the patch titled
f2fs: sanity check size of nat and sit cache
to the 4.9-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:
f2fs-sanity-check-size-of-nat-and-sit-cache.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 21d3f8e1c3b7996ce239ab6fa82e9f7a8c47d84d Mon Sep 17 00:00:00 2001
From: Jin Qian <jinqian@xxxxxxxxxxx>
Date: Thu, 1 Jun 2017 11:18:30 -0700
Subject: f2fs: sanity check size of nat and sit cache
From: Jin Qian <jinqian@xxxxxxxxxxx>
commit 21d3f8e1c3b7996ce239ab6fa82e9f7a8c47d84d upstream.
Make sure number of entires doesn't exceed max journal size.
Signed-off-by: Jin Qian <jinqian@xxxxxxxxxxx>
Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/segment.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1805,6 +1805,8 @@ static int read_normal_summaries(struct
static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
{
+ struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
+ struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
int type = CURSEG_HOT_DATA;
int err;
@@ -1831,6 +1833,11 @@ static int restore_curseg_summaries(stru
return err;
}
+ /* sanity check for summary blocks */
+ if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
+ sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES)
+ return -EINVAL;
+
return 0;
}
Patches currently in stable-queue which might be from jinqian@xxxxxxxxxxx are
queue-4.9/f2fs-sanity-check-size-of-nat-and-sit-cache.patch