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 4.12-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-4.12 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 @@ -2463,6 +2463,8 @@ 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; @@ -2489,6 +2491,11 @@ 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-4.12/f2fs-sanity-check-size-of-nat-and-sit-cache.patch