Re: [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag
From: Christoph Hellwig <hch@lst.de>
Date: 2020-09-18 15:16:22
Also in:
io-uring, keyrings, linux-arm-kernel, linux-block, linux-fsdevel, linux-mips, linux-mm, linux-s390, linux-scsi, linux-security-module, linuxppc-dev, lkml, netdev, sparclinux
On Fri, Sep 18, 2020 at 02:58:22PM +0100, Al Viro wrote:
Said that, why not provide a variant that would take an explicit "is it compat" argument and use it there? And have the normal one pass in_compat_syscall() to that...
That would help to not introduce a regression with this series yes. But it wouldn't fix existing bugs when io_uring is used to access read or write methods that use in_compat_syscall(). One example that I recently ran into is drivers/scsi/sg.c.