linux-kernel - [PATCH] UML: BLKGETSIZE takes a long, not an int

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Message-ID: <20070815213825.GA26490@clipper.ens.fr>
Date:	Wed, 15 Aug 2007 23:38:25 +0200
From:	Nicolas George <nicolas.george@...malesup.org>
To:	Jeff Dike <jdike@...toit.com>
Cc:	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: [PATCH] UML: BLKGETSIZE takes a long, not an int

The BLKGETSIZE ioctl expects a pointer to a long, os_file_size was providing
an int. Therefore, ubd access to host block devices caused a segmentation
fault on 64 bits systems.

Signed-off-by: Nicolas George <nicolas.george@...malesup.org>

---

Jeff Dike wrote:
> Looks sane, can I have a properly Signed-off-by: version of the patch?

Of course. I should have sent it correctly the first time. And I am terribly
sorry for the mess my mailer have done with my second mail.

Here is the hopefully correct patch, against current git.

Regards.

diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 6f92f73..c3ecc2a 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -320,7 +320,8 @@ int os_file_size(char *file, unsigned long long *size_out)
 	}
 
 	if(S_ISBLK(buf.ust_mode)){
-		int fd, blocks;
+		int fd;
+		long blocks;
 
 		fd = os_open_file(file, of_read(OPENFLAGS()), 0);
 		if(fd < 0){
-
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