From: Liu Bo <bo.liu@linux.alibaba.com>
Date: Wed, 17 Apr 2019 20:04:41 +0000 (+0800)
Subject: fuse: honor RLIMIT_FSIZE in fuse_file_fallocate
X-Git-Tag: v3.16.74~86
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e09925b72cc58decfc28f8cf183a24198fba4864;p=thirdparty%2Fkernel%2Fstable.git

fuse: honor RLIMIT_FSIZE in fuse_file_fallocate

commit 0cbade024ba501313da3b7e5dd2a188a6bc491b5 upstream.

fstests generic/228 reported this failure that fuse fallocate does not
honor what 'ulimit -f' has set.

This adds the necessary inode_newsize_ok() check.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Fixes: 05ba1f082300 ("fuse: add FALLOCATE operation")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 9d92f83348d1a..7bb97212439d4 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3017,6 +3017,13 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
 		}
 	}
 
+	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+	    offset + length > i_size_read(inode)) {
+		err = inode_newsize_ok(inode, offset + length);
+		if (err)
+			return err;
+	}
+
 	if (!(mode & FALLOC_FL_KEEP_SIZE))
 		set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);