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