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| author | Jeff Moyer <jmoyer@redhat.com> | 2010-05-26 14:44:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-27 09:12:53 -0700 |
| commit | 9d85cba718efeef9ca00ce3f7f34f5880737aa9b (patch) | |
| tree | d445d35d915b65dac171e58f83c75feb15d625fd /fs/compat.c | |
| parent | b83733639a494d5f42fa00a2506563fbd2d3015d (diff) | |
| download | linux-9d85cba718efeef9ca00ce3f7f34f5880737aa9b.tar.gz linux-9d85cba718efeef9ca00ce3f7f34f5880737aa9b.tar.bz2 linux-9d85cba718efeef9ca00ce3f7f34f5880737aa9b.zip | |
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.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/compat.c b/fs/compat.c index 7b4aabb3bb36..f0b391c50552 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; } |