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authorJeff Moyer <jmoyer@redhat.com>2010-05-26 14:44:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 09:12:53 -0700
commit9d85cba718efeef9ca00ce3f7f34f5880737aa9b (patch)
treed445d35d915b65dac171e58f83c75feb15d625fd /fs/compat.c
parentb83733639a494d5f42fa00a2506563fbd2d3015d (diff)
aio: fix the compat vectored operations
The aio compat code was not converting the struct iovecs from 32bit to 64bit pointers, causing either EINVAL to be returned from io_getevents, or EFAULT as the result of the I/O. This patch passes a compat flag to io_submit to signal that pointer conversion is necessary for a given iocb array. A variant of this was tested by Michael Tokarev. I have also updated the libaio test harness to exercise this code path with good success. Further, I grabbed a copy of ltp and ran the testcases/kernel/syscall/readv and writev tests there (compiled with -m32 on my 64bit system). All seems happy, but extra eyes on this would be welcome. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix CONFIG_COMPAT=n build] Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Reported-by: Michael Tokarev <mjt@tls.msk.ru> Cc: Zach Brown <zach.brown@oracle.com> Cc: <stable@kernel.org> [2.6.35.1] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 7b4aabb3bb3..f0b391c5055 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -673,7 +673,7 @@ compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
ret = copy_iocb(nr, iocb, iocb64);
if (!ret)
- ret = sys_io_submit(ctx_id, nr, iocb64);
+ ret = do_io_submit(ctx_id, nr, iocb64, 1);
return ret;
}