On Tue, Sep 09, 2014 at 04:10:00PM +0800, Chao Yu wrote: > Hi Jaegeuk, > > Looks good to me! > > One nitpick, how about judging this condition before we lock ->i_mutex to > avoid unneeded lock contention and invoking of i_size_read()? Agreed. >From 0b4c5afde9b57c08b55d26725d228d5314cfc57a Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx> Date: Mon, 8 Sep 2014 10:59:43 -0700 Subject: [PATCH] f2fs: fix negative value for lseek offset If application throws negative value of lseek with SEEK_DATA|SEEK_HOLE, previous f2fs went into BUG_ON in get_dnode_of_data, which was reported by Tommi Rantala. He could make a simple code to detect this having: lseek(fd, -17595150933902LL, SEEK_DATA); This patch should resolve that bug. Reported-by: Tommi Rentala <tt.rantala@xxxxxxxxx> [Jaegeuk Kim: relocate the condition as suggested by Chao] Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx> --- fs/f2fs/file.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 9f0ea3d..5cde363 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -353,6 +353,8 @@ static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) maxbytes, i_size_read(inode)); case SEEK_DATA: case SEEK_HOLE: + if (offset < 0) + return -ENXIO; return f2fs_seek_block(file, offset, whence); } -- 1.8.5.2 (Apple Git-48) -- To unsubscribe from this list: send the line "unsubscribe trinity" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
