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* FAILED: patch "[PATCH] fuse: verify write return" failed to apply to 5.3-stable tree
@ 2019-12-07 12:06 gregkh
  0 siblings, 0 replies; only message in thread
From: gregkh @ 2019-12-07 12:06 UTC (permalink / raw)
  To: mszeredi, stable; +Cc: stable

The patch below does not apply to the 5.3-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <>.


greg k-h

------------------ original commit in Linus's tree ------------------

From 8aab336b14c115c6bf1d4baeb9247e41ed9ce6de Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <>
Date: Tue, 12 Nov 2019 11:49:04 +0100
Subject: [PATCH] fuse: verify write return

Make sure filesystem is not returning a bogus number of bytes written.

Fixes: ea9b9907b82a ("fuse: implement perform_write")
Cc: <> # v2.6.26
Signed-off-by: Miklos Szeredi <>

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index db48a5cf8620..795d0f24d8b4 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1096,6 +1096,8 @@ static ssize_t fuse_send_write_pages(struct fuse_io_args *ia,
 	ia-> = fuse_write_flags(iocb);
 	err = fuse_simple_request(fc, &ap->args);
+	if (!err && ia->write.out.size > count)
+		err = -EIO;
 	offset = ap->descs[0].offset;
 	count = ia->write.out.size;

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2019-12-07 12:06 FAILED: patch "[PATCH] fuse: verify write return" failed to apply to 5.3-stable tree gregkh

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