From 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Tue, 22 Jun 2021 09:15:35 +0200 Subject: fuse: reject internal errno Don't allow userspace to report errors that could be kernel-internal. Reported-by: Anatoly Trosinenko Fixes: 334f485df85a ("[PATCH] FUSE - device functions") Cc: # v2.6.14 Signed-off-by: Miklos Szeredi --- fs/fuse/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/fuse') diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 6e63bcba2a40..b8d58aa08206 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1867,7 +1867,7 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud, } err = -EINVAL; - if (oh.error <= -1000 || oh.error > 0) + if (oh.error <= -512 || oh.error > 0) goto copy_finish; spin_lock(&fpq->lock); -- cgit v1.2.3