Hi,
Here's the bypass (really ugly, just skip the following cmd test and
directly go to the vfs_ioctl call later in the func).
And yes, I'm using a 64bits kernel and app is 32 bits...
= 8< ==========================
--- compat.c.git 2006-03-08 20:31:27.000000000 +0100
+++ compat.c 2006-03-08 20:30:10.000000000 +0100
@@ -400,6 +400,7 @@ asmlinkage long compat_sys_ioctl(unsigne
} else {
static int count;
+ goto do_ioctl;
if (++count <= 50)
compat_ioctl_error(filp, fd, cmd, arg);
error = -EINVAL;
= 8< ==========================
Regards
--
Fred
Ming Zhang a écrit :
thanks for the catch.
could u show us how u did that bypass? thanks.
ming
On Wed, 2006-03-08 at 19:13 +0100, Frederic Temporelli wrote:
Hello,
I would like to report an ioctl issue using IET 0.4.13 (iSCSI target)
and kernel 2.6.16-rc1, running on mips / SGI O2
The driver seems to load nicely, but there was no way to do ioctl on the
userspace device /dev/ietctl.
I got such messages in syslog:
Mar 4 16:47:16 o2 kernel: [4303606.514000] ioctl32(ietd:3448): Unknown
cmd fd(4) cmd(81046900){01} arg(7f942ab0) on /dev/ietctl
=> I've been able to resolve the issue by adding a by-pass (goto
do_ioctl) in kernel compat_sys_ioctl function (fs/compat.c) and all is
working fine now.
I don't know if such issue is related to mips only or is due to changes
2.6.16 kernel
I've also did some tries on x86 with linux 2.6.15.5, all was working
fine without needing to change anything in the kernel.
Did somebody report such issue with IET and recent kernel ?
May some people from linux-mips tell if such issue is mips specific ?
Best regards.
--
Fred
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