From 0cbade024ba501313da3b7e5dd2a188a6bc491b5 Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.liu@linux.alibaba.com>
Date: Thu, 18 Apr 2019 04:04:41 +0800
Subject: fuse: honor RLIMIT_FSIZE in fuse_file_fallocate

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")
Cc: <stable@vger.kernel.org> # v3.5
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
 fs/fuse/file.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'fs/fuse')

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5428c81879b2..f811af4f6507 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3044,6 +3044,13 @@ 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);
 
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