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From: Christoph Hellwig <hch@lst.de>
To: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Jens Axboe <axboe@kernel.dk>, Arnd Bergmann <arnd@arndb.de>,
	David Howells <dhowells@redhat.com>,
	linux-arm-kernel@lists.infradead.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org,
	linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-s390@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
	io-uring@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-mm@kvack.org, netdev@vger.kernel.org,
	keyrings@vger.kernel.org, linux-security-module@vger.kernel.org
Subject: let import_iovec deal with compat_iovecs as well
Date: Fri, 18 Sep 2020 14:45:24 +0200
Message-ID: <20200918124533.3487701-1-hch@lst.de> (raw)

Hi Al,

this series changes import_iovec to transparently deal with comat iovec
structures, and then cleanups up a lot of code dupliation.  But to get
there it first has to fix the pre-existing bug that io_uring compat
contexts don't trigger the in_compat_syscall() check.  This has so far
been relatively harmless as very little code callable from io_uring used
the check, and even that code that could be called usually wasn't.

Diffstat
 arch/arm64/include/asm/unistd32.h                  |   10 
 arch/mips/kernel/syscalls/syscall_n32.tbl          |   10 
 arch/mips/kernel/syscalls/syscall_o32.tbl          |   10 
 arch/parisc/kernel/syscalls/syscall.tbl            |   10 
 arch/powerpc/kernel/syscalls/syscall.tbl           |   10 
 arch/s390/kernel/syscalls/syscall.tbl              |   10 
 arch/sparc/include/asm/compat.h                    |    3 
 arch/sparc/kernel/syscalls/syscall.tbl             |   10 
 arch/x86/entry/syscall_x32.c                       |    5 
 arch/x86/entry/syscalls/syscall_32.tbl             |   10 
 arch/x86/entry/syscalls/syscall_64.tbl             |   10 
 arch/x86/include/asm/compat.h                      |    2 
 block/scsi_ioctl.c                                 |   12 
 drivers/scsi/sg.c                                  |    9 
 fs/aio.c                                           |   38 --
 fs/io_uring.c                                      |   21 -
 fs/read_write.c                                    |  307 ++++-----------------
 fs/splice.c                                        |   57 ---
 include/linux/compat.h                             |   29 -
 include/linux/fs.h                                 |    7 
 include/linux/sched.h                              |    1 
 include/linux/uio.h                                |    7 
 include/uapi/asm-generic/unistd.h                  |   12 
 lib/iov_iter.c                                     |   30 --
 mm/process_vm_access.c                             |   69 ----
 net/compat.c                                       |    4 
 security/keys/compat.c                             |   37 --
 security/keys/internal.h                           |    5 
 security/keys/keyctl.c                             |    2 
 tools/include/uapi/asm-generic/unistd.h            |   12 
 tools/perf/arch/powerpc/entry/syscalls/syscall.tbl |   10 
 tools/perf/arch/s390/entry/syscalls/syscall.tbl    |   10 
 tools/perf/arch/x86/entry/syscalls/syscall_64.tbl  |   10 
 33 files changed, 207 insertions(+), 582 deletions(-)

             reply index

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-18 12:45 Christoph Hellwig [this message]
2020-09-18 12:45 ` [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag Christoph Hellwig
2020-09-18 13:40   ` Al Viro
2020-09-18 13:44     ` Christoph Hellwig
2020-09-18 13:58       ` Al Viro
2020-09-18 15:16         ` Christoph Hellwig
2020-09-19 16:21           ` Andy Lutomirski
2020-09-19 21:16             ` Arnd Bergmann
2020-09-19 21:52               ` Finn Thain
2020-09-19 22:22               ` Andy Lutomirski
2020-09-21 16:10                 ` Pavel Begunkov
2020-09-21 16:13                   ` Pavel Begunkov
2020-09-21 23:51                     ` Andy Lutomirski
2020-09-22  0:22                       ` Pavel Begunkov
2020-09-22  0:58                         ` Andy Lutomirski
2020-09-22  6:30                           ` Pavel Begunkov
2020-09-22  7:23                             ` Arnd Bergmann
2020-09-22  7:57                               ` Pavel Begunkov
2020-09-22  9:01                                 ` Arnd Bergmann
2020-09-22 16:20                                   ` Andy Lutomirski
2020-09-23  8:01                                   ` Pavel Begunkov
2020-09-23 13:22                                     ` Al Viro
2020-09-19 22:09           ` Al Viro
2020-09-19 22:23             ` Andy Lutomirski
2020-09-19 22:41               ` Al Viro
2020-09-19 22:53                 ` Andy Lutomirski
2020-09-19 23:24                   ` Al Viro
2020-09-20  0:14                     ` Andy Lutomirski
2020-09-20  2:57                       ` Al Viro
2020-09-20 16:59                         ` Andy Lutomirski
2020-09-20 18:12                           ` Al Viro
2020-09-20 13:55             ` Arnd Bergmann
2020-09-20 15:02               ` Al Viro
2020-09-19 14:53         ` David Laight
2020-09-18 13:59       ` Arnd Bergmann
2020-09-20 15:15   ` Matthew Wilcox
2020-09-20 15:55     ` William Kucharski
2020-09-21 16:20       ` Pavel Begunkov
2020-09-20 16:00     ` Arnd Bergmann
2020-09-20 18:07     ` Al Viro
2020-09-20 18:41       ` Al Viro
2020-09-20 19:01       ` Matthew Wilcox
2020-09-20 19:10         ` Al Viro
2020-09-20 19:22           ` Matthew Wilcox
2020-09-20 19:28             ` Andy Lutomirski
2020-09-20 20:49               ` Arnd Bergmann
2020-09-20 21:13                 ` David Laight
2020-09-21 16:31                   ` Pavel Begunkov
2020-09-20 21:42             ` Al Viro
2020-09-21 16:26             ` Pavel Begunkov
2020-09-20 19:14       ` Andy Lutomirski
2020-09-21  4:28         ` Christoph Hellwig
2020-09-18 12:45 ` [PATCH 2/9] compat.h: fix a spelling error in <linux/compat.h> Christoph Hellwig
2020-09-18 13:37   ` Johannes Thumshirn
2020-09-18 12:45 ` [PATCH 3/9] fs: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector Christoph Hellwig
2020-09-18 12:56   ` Matthew Wilcox
2020-09-18 13:39   ` Johannes Thumshirn
2020-09-18 12:45 ` [PATCH 4/9] fs: handle the compat case in import_iovec Christoph Hellwig
2020-09-18 12:45 ` [PATCH 5/9] fs: remove various compat readv/writev helpers Christoph Hellwig
2020-09-18 12:45 ` [PATCH 6/9] fs: remove the compat readv/writev syscalls Christoph Hellwig
2020-09-18 12:45 ` [PATCH 7/9] fs: remove compat_sys_vmsplice Christoph Hellwig
2020-09-18 12:45 ` [PATCH 8/9] mm: remove compat_process_vm_{readv,writev} Christoph Hellwig
2020-09-18 13:48   ` Arnd Bergmann
2020-09-18 12:45 ` [PATCH 9/9] security/keys: remove compat_keyctl_instantiate_key_iov Christoph Hellwig
2020-09-19 14:24 ` let import_iovec deal with compat_iovecs as well David Laight
2020-09-21  4:41   ` 'Christoph Hellwig'
2020-09-21 11:11     ` David Laight

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