diff options
| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2018-07-10 16:55:57 +0200 |
|---|---|---|
| committer | Eduardo Otubo <otubo@redhat.com> | 2018-07-12 14:52:39 +0200 |
| commit | 056de1e894155fbb99e7b43c1c4382d4920cf437 (patch) | |
| tree | 91b276b5acf52682ff670f55b08f1457c6a83994 /qemu-seccomp.c | |
| parent | c447afd5783b9237fa51b7a85777007d8d568bfc (diff) | |
seccomp: allow sched_setscheduler() with SCHED_IDLE policy
Current and upcoming mesa releases rely on a shader disk cash. It uses
a thread job queue with low priority, set with
sched_setscheduler(SCHED_IDLE). However, that syscall is rejected by
the "resourcecontrol" seccomp qemu filter.
Since it should be safe to allow lowering thread priority, let's allow
scheduling thread to idle policy.
Related to:
https://bugzilla.redhat.com/show_bug.cgi?id=1594456
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Eduardo Otubo <otubo@redhat.com>
Diffstat (limited to 'qemu-seccomp.c')
| -rw-r--r-- | qemu-seccomp.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/qemu-seccomp.c b/qemu-seccomp.c index 148e4c6f24..9cd8eb9499 100644 --- a/qemu-seccomp.c +++ b/qemu-seccomp.c @@ -34,6 +34,12 @@ struct QemuSeccompSyscall { int32_t num; uint8_t set; + uint8_t narg; + const struct scmp_arg_cmp *arg_cmp; +}; + +const struct scmp_arg_cmp sched_setscheduler_arg[] = { + SCMP_A1(SCMP_CMP_NE, SCHED_IDLE) }; static const struct QemuSeccompSyscall blacklist[] = { @@ -92,7 +98,8 @@ static const struct QemuSeccompSyscall blacklist[] = { { SCMP_SYS(setpriority), QEMU_SECCOMP_SET_RESOURCECTL }, { SCMP_SYS(sched_setparam), QEMU_SECCOMP_SET_RESOURCECTL }, { SCMP_SYS(sched_getparam), QEMU_SECCOMP_SET_RESOURCECTL }, - { SCMP_SYS(sched_setscheduler), QEMU_SECCOMP_SET_RESOURCECTL }, + { SCMP_SYS(sched_setscheduler), QEMU_SECCOMP_SET_RESOURCECTL, + ARRAY_SIZE(sched_setscheduler_arg), sched_setscheduler_arg }, { SCMP_SYS(sched_getscheduler), QEMU_SECCOMP_SET_RESOURCECTL }, { SCMP_SYS(sched_setaffinity), QEMU_SECCOMP_SET_RESOURCECTL }, { SCMP_SYS(sched_getaffinity), QEMU_SECCOMP_SET_RESOURCECTL }, @@ -118,7 +125,8 @@ static int seccomp_start(uint32_t seccomp_opts) continue; } - rc = seccomp_rule_add(ctx, SCMP_ACT_KILL, blacklist[i].num, 0); + rc = seccomp_rule_add_array(ctx, SCMP_ACT_KILL, blacklist[i].num, + blacklist[i].narg, blacklist[i].arg_cmp); if (rc < 0) { goto seccomp_return; } |