Your message dated Tue, 18 Oct 2016 22:56:54 +0200
with message-id <[email protected]>
and subject line Re: Bug#841240: linux: x32 preadv/pwritev syscalls broken in
kernel 4.7
has caused the Debian Bug report #841240,
regarding linux: x32 preadv/pwritev syscalls broken in kernel 4.7
to be marked as done.
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--
841240: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=841240
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--- Begin Message ---
Source: linux
Version: 4.7.6-1
Severity: normal
The x32 preadv/pwritev syscalls have been broken in kernel 4.7-rc1 by
this commit:
| commit 482dd2ef124484601adea82e5e806e81e2bc5521
| Author: Christoph Hellwig <[email protected]>
| Date: Thu Apr 7 22:43:59 2016 +0200
|
| x86/syscalls: Wire up compat readv2/writev2 syscalls
|
| Reported-by: David Smith <[email protected]>
| Tested-by: David Smith <[email protected]>
| Signed-off-by: Christoph Hellwig <[email protected]>
| Cc: Andy Lutomirski <[email protected]>
| Cc: Borislav Petkov <[email protected]>
| Cc: Brian Gerst <[email protected]>
| Cc: Denys Vlasenko <[email protected]>
| Cc: H. Peter Anvin <[email protected]>
| Cc: Linus Torvalds <[email protected]>
| Cc: Peter Zijlstra <[email protected]>
| Cc: Thomas Gleixner <[email protected]>
| Link: http://lkml.kernel.org/r/[email protected]
| Signed-off-by: Ingo Molnar <[email protected]>
It causes the glibc testsuite to fail on x32 when running a 4.7 kernel,
and more precisely the misc/tst-preadvwritev and misc/tst-preadvwritev64
tests.
The syscalls have been fixed in kernel 4.8-rc1 by this commit, even if
neither the commit nor the mail it refers too talk about a breakage:
| commit 3ebfd81f7fb3e81a754e37283b7f38c62244641a
| Author: H.J. Lu <[email protected]>
| Date: Thu Jul 14 12:31:53 2016 -0700
|
| x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2
|
| Don't use the same syscall numbers for 2 different syscalls:
|
| 534 x32 preadv compat_sys_preadv64
| 535 x32 pwritev compat_sys_pwritev64
| 534 x32 preadv2 compat_sys_preadv2
| 535 x32 pwritev2 compat_sys_pwritev2
|
| Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit
offset
| is passed in one 64-bit register on x32, similar to compat_sys_preadv64()
| and compat_sys_pwritev64().
|
| Signed-off-by: H.J. Lu <[email protected]>
|
| x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2
|
| Don't use the same syscall numbers for 2 different syscalls:
|
| 534 x32 preadv compat_sys_preadv64
| 535 x32 pwritev compat_sys_pwritev64
| 534 x32 preadv2 compat_sys_preadv2
| 535 x32 pwritev2 compat_sys_pwritev2
|
| Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit
offset
| is passed in one 64-bit register on x32, similar to compat_sys_preadv64()
| and compat_sys_pwritev64().
|
| Signed-off-by: H.J. Lu <[email protected]>
| Cc: Andy Lutomirski <[email protected]>
| Cc: Borislav Petkov <[email protected]>
| Cc: Brian Gerst <[email protected]>
| Cc: Christoph Hellwig <[email protected]>
| Cc: Denys Vlasenko <[email protected]>
| Cc: H. Peter Anvin <[email protected]>
| Cc: Josh Poimboeuf <[email protected]>
| Cc: Linus Torvalds <[email protected]>
| Cc: Peter Zijlstra <[email protected]>
| Cc: Thomas Gleixner <[email protected]>
| Link:
http://lkml.kernel.org/r/came9roovcmf-rqfx_n1u_tu_dx1bykjtfr%[email protected]
| Signed-off-by: Ingo Molnar <[email protected]>
Unfortunately this commit is not easily backportable as it completely
breaks the ABI. Nevertheless it should not be a big deal as we'll go to
kernel 4.8 soon. Given it is already available in experimental, I am
just going to close this bug in a few minutes. I just wanted to make
sure the issue is documented somewhere so that someone else do not spend
hours before finding the issue.
-- System Information:
Debian Release: stretch/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
--- End Message ---
--- Begin Message ---
Version: 4.8~rc5-1~exp1
On 2016-10-18 22:47, Aurelien Jarno wrote:
> Source: linux
> Version: 4.7.6-1
> Severity: normal
>
> The x32 preadv/pwritev syscalls have been broken in kernel 4.7-rc1 by
> this commit:
>
> | commit 482dd2ef124484601adea82e5e806e81e2bc5521
> | Author: Christoph Hellwig <[email protected]>
> | Date: Thu Apr 7 22:43:59 2016 +0200
> |
> | x86/syscalls: Wire up compat readv2/writev2 syscalls
> |
> | Reported-by: David Smith <[email protected]>
> | Tested-by: David Smith <[email protected]>
> | Signed-off-by: Christoph Hellwig <[email protected]>
> | Cc: Andy Lutomirski <[email protected]>
> | Cc: Borislav Petkov <[email protected]>
> | Cc: Brian Gerst <[email protected]>
> | Cc: Denys Vlasenko <[email protected]>
> | Cc: H. Peter Anvin <[email protected]>
> | Cc: Linus Torvalds <[email protected]>
> | Cc: Peter Zijlstra <[email protected]>
> | Cc: Thomas Gleixner <[email protected]>
> | Link: http://lkml.kernel.org/r/[email protected]
> | Signed-off-by: Ingo Molnar <[email protected]>
>
> It causes the glibc testsuite to fail on x32 when running a 4.7 kernel,
> and more precisely the misc/tst-preadvwritev and misc/tst-preadvwritev64
> tests.
>
> The syscalls have been fixed in kernel 4.8-rc1 by this commit, even if
> neither the commit nor the mail it refers too talk about a breakage:
>
> | commit 3ebfd81f7fb3e81a754e37283b7f38c62244641a
> | Author: H.J. Lu <[email protected]>
> | Date: Thu Jul 14 12:31:53 2016 -0700
> |
> | x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2
> |
> | Don't use the same syscall numbers for 2 different syscalls:
> |
> | 534 x32 preadv compat_sys_preadv64
> | 535 x32 pwritev compat_sys_pwritev64
> | 534 x32 preadv2 compat_sys_preadv2
> | 535 x32 pwritev2 compat_sys_pwritev2
> |
> | Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit
> offset
> | is passed in one 64-bit register on x32, similar to
> compat_sys_preadv64()
> | and compat_sys_pwritev64().
> |
> | Signed-off-by: H.J. Lu <[email protected]>
> |
> | x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2
> |
> | Don't use the same syscall numbers for 2 different syscalls:
> |
> | 534 x32 preadv compat_sys_preadv64
> | 535 x32 pwritev compat_sys_pwritev64
> | 534 x32 preadv2 compat_sys_preadv2
> | 535 x32 pwritev2 compat_sys_pwritev2
> |
> | Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit
> offset
> | is passed in one 64-bit register on x32, similar to
> compat_sys_preadv64()
> | and compat_sys_pwritev64().
> |
> | Signed-off-by: H.J. Lu <[email protected]>
> | Cc: Andy Lutomirski <[email protected]>
> | Cc: Borislav Petkov <[email protected]>
> | Cc: Brian Gerst <[email protected]>
> | Cc: Christoph Hellwig <[email protected]>
> | Cc: Denys Vlasenko <[email protected]>
> | Cc: H. Peter Anvin <[email protected]>
> | Cc: Josh Poimboeuf <[email protected]>
> | Cc: Linus Torvalds <[email protected]>
> | Cc: Peter Zijlstra <[email protected]>
> | Cc: Thomas Gleixner <[email protected]>
> | Link:
> http://lkml.kernel.org/r/came9roovcmf-rqfx_n1u_tu_dx1bykjtfr%[email protected]
> | Signed-off-by: Ingo Molnar <[email protected]>
>
> Unfortunately this commit is not easily backportable as it completely
> breaks the ABI. Nevertheless it should not be a big deal as we'll go to
> kernel 4.8 soon. Given it is already available in experimental, I am
> just going to close this bug in a few minutes. I just wanted to make
> sure the issue is documented somewhere so that someone else do not spend
> hours before finding the issue.
As said above, it's not worthwhile spending time on that. Marking the
bug as fixed in 4.8.
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
[email protected] http://www.aurel32.net
--- End Message ---
