linux-kernel - Re: UML/man: BLKGETSIZE takes a long, not an int

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Mon, 27 Aug 2007 15:25:54 +0200
From:	Michael Kerrisk <mtk-manpages@....net>
To:	Nicolas George <nicolas.george@....fr>
CC:	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net, jdike@...ux.intel.com
Subject: Re: UML/man: BLKGETSIZE takes a long, not an int

Hello Nicolas,

> I fear that my bug-report yesterday was very badly written, with me writing
> to the wrong mailing-list and all.
> 
> I was saying:
> 
>> I found a type mismatch in UML that makes host block devices unusable as ubd
>> devices on x86_64 and other 64 bits systems (segfault of the mm subsystem):
>>
>> In block/ioctl.c, the following lines show that the BLKGETSIZE ioctl expects
>> a pointer to a long:
>>
>> 	case BLKGETSIZE:
>> 		if ((bdev->bd_inode->i_size >> 9) > ~0UL)
>> 			return -EFBIG;
>> 		return put_ulong(arg, bdev->bd_inode->i_size >> 9);
>>
>> In arch/um/os-Linux/file.c, os_file_size calls it with an int.
>>
>> The ioctl_list man page should be fixed as well.

manual page changed for 2.65:

--- ioctl_list.2
+++ ioctl_list.2        (working copy)
@@ -243,7 +243,7 @@
 0x0000125D  BLKROSET                   const int *
 0x0000125E  BLKROGET                   int *
 0x0000125F  BLKRRPART                  void
-0x00001260  BLKGETSIZE                 int *
+0x00001260  BLKGETSIZE                 unsigned long *
 0x00001261  BLKFLSBUF                  void
 0x00001262  BLKRASET                   int
 0x00001263  BLKRAGET                   int *

Thanks,

Michael

-- 
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7

Want to help with man page maintenance?  Grab the latest tarball at
http://www.kernel.org/pub/linux/docs/manpages/
read the HOWTOHELP file and grep the source files for 'FIXME'.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/