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From 982a3d6d0569bed08ee7d31380271abe69d836b4 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Thu, 30 Apr 2015 10:31:57 +0200
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Subject: [PATCH 1/4] seccomp: add timerfd_create and timerfd_settime to the
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whitelist
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Message-id: <1430389917-29237-2-git-send-email-kraxel@redhat.com>
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Patchwork-id: 64959
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 1/1] seccomp: add timerfd_create and timerfd_settime to the whitelist
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Bugzilla: 1185737
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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From: Felix Geyer <debfx@fobos.de>
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libusb calls timerfd_create() and timerfd_settime() when it's built with
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timerfd support.
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Command to reproduce:
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-device usb-host,hostbus=1,hostaddr=3,id=hostdev0
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Log messages:
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audit(1390730418.924:135): auid=4294967295 uid=121 gid=103 ses=4294967295
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pid=5232 comm="qemu-system-x86" sig=31 syscall=283
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compat=0 ip=0x7f2b0f4e96a7 code=0x0
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audit(1390733100.580:142): auid=4294967295 uid=121 gid=103 ses=4294967295
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pid=16909 comm="qemu-system-x86" sig=31 syscall=286
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compat=0 ip=0x7f03513a06da code=0x0
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Reading a few hundred MB from a USB drive on x86_64 shows this syscall distribution.
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Therefore the timerfd_settime priority is set to 242.
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calls syscall
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--------- ----------------
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5303600 write
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2240554 read
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2167030 ppoll
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2134828 ioctl
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704023 timerfd_settime
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689105 poll
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83122 futex
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803 writev
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476 rt_sigprocmask
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287 recvmsg
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178 brk
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Signed-off-by: Felix Geyer <debfx@fobos.de>
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Signed-off-by: Eduardo Otubo <otubo@linux.vnet.ibm.com>
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(cherry picked from commit 84397618529f920bea45d0bab22ec097766244fc)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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Conflicts:
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qemu-seccomp.c
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---
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qemu-seccomp.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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---
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qemu-seccomp.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/qemu-seccomp.c b/qemu-seccomp.c
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index 59cae8e..5e60fce 100644
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--- a/qemu-seccomp.c
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+++ b/qemu-seccomp.c
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@@ -154,6 +154,7 @@ static const struct QemuSeccompSyscall seccomp_whitelist[] = {
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{ SCMP_SYS(getsockname), 242 },
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{ SCMP_SYS(getpeername), 242 },
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{ SCMP_SYS(accept4), 242 },
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+ { SCMP_SYS(timerfd_settime), 242 },
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{ SCMP_SYS(newfstatat), 241 },
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{ SCMP_SYS(shutdown), 241 },
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{ SCMP_SYS(getsockopt), 241 },
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@@ -246,7 +247,8 @@ static const struct QemuSeccompSyscall seccomp_whitelist[] = {
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{ SCMP_SYS(shmctl), 240 },
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{ SCMP_SYS(mlock), 240 },
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{ SCMP_SYS(munlock), 240 },
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- { SCMP_SYS(semctl), 240 }
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+ { SCMP_SYS(semctl), 240 },
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+ { SCMP_SYS(timerfd_create), 240 },
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};
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int seccomp_start(void)
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--
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1.8.3.1
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