Yamato,
Would you like to say something here ?
Regards--
Subrata
On Wed, 2008-10-15 at 22:22 +0530, Subrata Modak wrote:
> Yamato,
>
> You would like to say something here ?
>
> Regards--
> Subrata
>
> On Tue, 2008-10-14 at 14:41 +0800, Jin Bing Guo wrote:
> > Hi,
> >
> > io_submit case always failed on ppc64.
> >
> > ----------
> > [EMAIL PROTECTED] cvs_ltp]# uname -a
> > Linux ovislp1.upt.austin.ibm.com 2.6.18-92.el5 #1 SMP Tue Apr 29
> > 13:21:29 EDT
> > 2008 ppc64 ppc64 ppc64 GNU/Linux
> > [EMAIL PROTECTED] cvs_ltp]# rpm -qa | grep libaio
> > libaio-0.3.106-3.2
> > libaio-0.3.106-3.2
> > libaio-devel-0.3.106-3.2
> > libaio-devel-0.3.106-3.2
> > [EMAIL PROTECTED] cvs_ltp]#
> > testcases/kernel/syscalls/io_submit/io_submit01
> > io_submit01 1 PASS : expected failure - returned value = 22 :
> > Invalid argument
> > io_submit01 2 FAIL : unexpected returned value - -22 - expected
> > -14
> > io_submit01 3 PASS : expected failure - returned value = 9 : Bad
> > file descriptor
> >
> > There could be an issue with the test case here. What is done is "
> > io_submit(ctx, 0, (void*)-1 ) ".So in compat_sys_io_submit(), we
> > allocate memory on the user space stack using
> > compat_alloc_user_space.
> > We then copy from the address specified in the syscall to the address
> > allocated via the compat_alloc_user_space call. Now, if the size
> > field
> > is zero, no copy takes place. This valid address (stack pointer or
> > an address close to it) is then used in sys_io_submit and we dont see
> > the EFAULT. In order to see this fault, we would have to set nr>0 and
> > copy_iocb() catches the invalid address specified in the system call.
> > Retrying the test with nr>0 results in an EFAULT.
> >
> > Signed-off-by: Sridhar Vinay <[EMAIL PROTECTED]>
> > Signed-off-by: Jin Bing Guo <[EMAIL PROTECTED]>
> > ------
> >
> >
> > Thanks,
> > --Jin Bing Guo
> >
> >
> >
> >
> >
> >
> >
> > text/x-diff
> > attachment
> > (Fix_test_error_io_submit.patch)
> >
> > ---
> > cvs_ltp.orig/testcases/kernel/syscalls/io_submit/io_submit01.c
> > 2008-07-21 06:55:35.000000000 -0400
> > +++
> > cvs_ltp/testcases/kernel/syscalls/io_submit/io_submit01.c 2008-10-13
> > 22:47:21.000000000 -0400
> > @@ -128,7 +128,7 @@ main(int argc, char** argv)
> > EFAULT One of the data structures points to invalid
> > data.
> > */
> > expected_return = -EFAULT;
> > - TEST(io_submit( ctx, 0, (void*)-1 ));
> > + TEST(io_submit( ctx, 1, (void*)-1 ));
> > if (TEST_RETURN == 0) {
> > tst_resm(TFAIL, "call succeeded
> > unexpectedly");
> > } else if (TEST_RETURN == expected_return) {
> >
>
>
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