* [PATCH] virtiofsd: Add restart_syscall to the seccomp whitelist
@ 2021-02-01 19:33 Greg Kurz
2021-02-01 19:52 ` Dr. David Alan Gilbert
2021-02-03 14:27 ` Stefan Hajnoczi
0 siblings, 2 replies; 3+ messages in thread
From: Greg Kurz @ 2021-02-01 19:33 UTC (permalink / raw)
To: qemu-devel; +Cc: Dr. David Alan Gilbert, Stefan Hajnoczi, Greg Kurz
This is how linux restarts some system calls after SIGSTOP/SIGCONT.
This is needed to avoid virtiofsd termination when resuming execution
under GDB for example.
Signed-off-by: Greg Kurz <groug@kaod.org>
---
This has passed Travis and gitlab CI without errors.
tools/virtiofsd/passthrough_seccomp.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/virtiofsd/passthrough_seccomp.c b/tools/virtiofsd/passthrough_seccomp.c
index a60d7da4b4e2..da03e97d35e4 100644
--- a/tools/virtiofsd/passthrough_seccomp.c
+++ b/tools/virtiofsd/passthrough_seccomp.c
@@ -88,6 +88,7 @@ static const int syscall_whitelist[] = {
SCMP_SYS(renameat),
SCMP_SYS(renameat2),
SCMP_SYS(removexattr),
+ SCMP_SYS(restart_syscall),
SCMP_SYS(rt_sigaction),
SCMP_SYS(rt_sigprocmask),
SCMP_SYS(rt_sigreturn),
--
2.26.2
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] virtiofsd: Add restart_syscall to the seccomp whitelist
2021-02-01 19:33 [PATCH] virtiofsd: Add restart_syscall to the seccomp whitelist Greg Kurz
@ 2021-02-01 19:52 ` Dr. David Alan Gilbert
2021-02-03 14:27 ` Stefan Hajnoczi
1 sibling, 0 replies; 3+ messages in thread
From: Dr. David Alan Gilbert @ 2021-02-01 19:52 UTC (permalink / raw)
To: Greg Kurz; +Cc: qemu-devel, Stefan Hajnoczi
* Greg Kurz (groug@kaod.org) wrote:
> This is how linux restarts some system calls after SIGSTOP/SIGCONT.
> This is needed to avoid virtiofsd termination when resuming execution
> under GDB for example.
Ah!
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> Signed-off-by: Greg Kurz <groug@kaod.org>
> ---
>
> This has passed Travis and gitlab CI without errors.
>
> tools/virtiofsd/passthrough_seccomp.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/tools/virtiofsd/passthrough_seccomp.c b/tools/virtiofsd/passthrough_seccomp.c
> index a60d7da4b4e2..da03e97d35e4 100644
> --- a/tools/virtiofsd/passthrough_seccomp.c
> +++ b/tools/virtiofsd/passthrough_seccomp.c
> @@ -88,6 +88,7 @@ static const int syscall_whitelist[] = {
> SCMP_SYS(renameat),
> SCMP_SYS(renameat2),
> SCMP_SYS(removexattr),
> + SCMP_SYS(restart_syscall),
> SCMP_SYS(rt_sigaction),
> SCMP_SYS(rt_sigprocmask),
> SCMP_SYS(rt_sigreturn),
> --
> 2.26.2
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] virtiofsd: Add restart_syscall to the seccomp whitelist
2021-02-01 19:33 [PATCH] virtiofsd: Add restart_syscall to the seccomp whitelist Greg Kurz
2021-02-01 19:52 ` Dr. David Alan Gilbert
@ 2021-02-03 14:27 ` Stefan Hajnoczi
1 sibling, 0 replies; 3+ messages in thread
From: Stefan Hajnoczi @ 2021-02-03 14:27 UTC (permalink / raw)
To: Greg Kurz; +Cc: qemu-devel, Dr. David Alan Gilbert
[-- Attachment #1: Type: text/plain, Size: 487 bytes --]
On Mon, Feb 01, 2021 at 08:33:05PM +0100, Greg Kurz wrote:
> This is how linux restarts some system calls after SIGSTOP/SIGCONT.
> This is needed to avoid virtiofsd termination when resuming execution
> under GDB for example.
>
> Signed-off-by: Greg Kurz <groug@kaod.org>
> ---
>
> This has passed Travis and gitlab CI without errors.
>
> tools/virtiofsd/passthrough_seccomp.c | 1 +
> 1 file changed, 1 insertion(+)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-02-01 19:33 [PATCH] virtiofsd: Add restart_syscall to the seccomp whitelist Greg Kurz
2021-02-01 19:52 ` Dr. David Alan Gilbert
2021-02-03 14:27 ` Stefan Hajnoczi
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