From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BDB4C2D0D2 for ; Sat, 21 Dec 2019 00:27:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C19D2072B for ; Sat, 21 Dec 2019 00:27:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726716AbfLUA1x (ORCPT ); Fri, 20 Dec 2019 19:27:53 -0500 Received: from mx2.suse.de ([195.135.220.15]:59536 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726565AbfLUA1w (ORCPT ); Fri, 20 Dec 2019 19:27:52 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 669ECACD9; Sat, 21 Dec 2019 00:27:48 +0000 (UTC) Date: Sat, 21 Dec 2019 11:27:34 +1100 From: Aleksa Sarai To: Sargun Dhillon Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, ealvarez@mozilla.com, arnd@arndb.de, jannh@google.com, gpascutto@mozilla.com, jld@mozilla.com, oleg@redhat.com, luto@amacapital.net, viro@zeniv.linux.org.uk, christian.brauner@ubuntu.com Subject: Re: [PATCH v5 2/3] pid: Introduce pidfd_getfd syscall Message-ID: <20191221002734.7rz6lcdrshrrlnqf@yavin.dot.cyphar.com> References: <20191220232810.GA20233@ircssh-2.c.rugged-nimbus-611.internal> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="gr477xaubyeqz5v6" Content-Disposition: inline In-Reply-To: <20191220232810.GA20233@ircssh-2.c.rugged-nimbus-611.internal> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --gr477xaubyeqz5v6 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2019-12-20, Sargun Dhillon wrote: > This syscall allows for the retrieval of file descriptors from other > processes, based on their pidfd. This is possible using ptrace, and > injection of parasitic code along with using SCM_RIGHTS to move > file descriptors between a tracee and a tracer. Unfortunately, ptrace > comes with a high cost of requiring the process to be stopped, and > breaks debuggers. This does not require stopping the process under > manipulation. >=20 > One reason to use this is to allow sandboxers to take actions on file > descriptors on the behalf of another process. For example, this can be > combined with seccomp-bpf's user notification to do on-demand fd > extraction and take privileged actions. For example, it can be used > to bind a socket to a privileged port. >=20 > /* prototype */ > /* > * pidfd_getfd_options is an extensible struct which can have options > * added to it. If options is NULL, size, and it will be ignored be > * ignored, otherwise, size should be set to sizeof(*options). If > * option is newer than the current kernel version, E2BIG will be > * returned. > */ > struct pidfd_getfd_options {}; > long pidfd_getfd(int pidfd, int fd, unsigned int flags, > struct pidfd_getfd_options *options, size_t size); >=20 > /* testing */ > Ran self-test suite on x86_64 >=20 > Signed-off-by: Sargun Dhillon > --- > MAINTAINERS | 1 + > arch/alpha/kernel/syscalls/syscall.tbl | 1 + > arch/arm/tools/syscall.tbl | 1 + > arch/arm64/include/asm/unistd.h | 2 +- > arch/arm64/include/asm/unistd32.h | 2 + > arch/ia64/kernel/syscalls/syscall.tbl | 1 + > arch/m68k/kernel/syscalls/syscall.tbl | 1 + > arch/microblaze/kernel/syscalls/syscall.tbl | 1 + > arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + > arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + > arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + > arch/parisc/kernel/syscalls/syscall.tbl | 1 + > arch/powerpc/kernel/syscalls/syscall.tbl | 1 + > arch/s390/kernel/syscalls/syscall.tbl | 1 + > arch/sh/kernel/syscalls/syscall.tbl | 1 + > arch/sparc/kernel/syscalls/syscall.tbl | 1 + > arch/x86/entry/syscalls/syscall_32.tbl | 1 + > arch/x86/entry/syscalls/syscall_64.tbl | 1 + > arch/xtensa/kernel/syscalls/syscall.tbl | 1 + > include/linux/syscalls.h | 4 + > include/uapi/asm-generic/unistd.h | 3 +- > include/uapi/linux/pidfd.h | 10 ++ > kernel/pid.c | 115 ++++++++++++++++++++ > 23 files changed, 151 insertions(+), 2 deletions(-) > create mode 100644 include/uapi/linux/pidfd.h >=20 > diff --git a/MAINTAINERS b/MAINTAINERS > index cc0a4a8ae06a..bc370ff59dbf 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -13014,6 +13014,7 @@ M: Christian Brauner > L: linux-kernel@vger.kernel.org > S: Maintained > T: git git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git > +F: include/uapi/linux/pidfd.h > F: samples/pidfd/ > F: tools/testing/selftests/pidfd/ > F: tools/testing/selftests/clone3/ > diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/s= yscalls/syscall.tbl > index 8e13b0b2928d..d1cac0d657b7 100644 > --- a/arch/alpha/kernel/syscalls/syscall.tbl > +++ b/arch/alpha/kernel/syscalls/syscall.tbl > @@ -475,3 +475,4 @@ > 543 common fspick sys_fspick > 544 common pidfd_open sys_pidfd_open > # 545 reserved for clone3 > +548 common pidfd_getfd sys_pidfd > diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl > index 6da7dc4d79cc..ba045e2f3a60 100644 > --- a/arch/arm/tools/syscall.tbl > +++ b/arch/arm/tools/syscall.tbl > @@ -449,3 +449,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > 435 common clone3 sys_clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/uni= std.h > index 2629a68b8724..b722e47377a5 100644 > --- a/arch/arm64/include/asm/unistd.h > +++ b/arch/arm64/include/asm/unistd.h > @@ -38,7 +38,7 @@ > #define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5) > #define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800) > =20 > -#define __NR_compat_syscalls 436 > +#define __NR_compat_syscalls 439 > #endif > =20 > #define __ARCH_WANT_SYS_CLONE > diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/u= nistd32.h > index 94ab29cf4f00..a8da97a2de41 100644 > --- a/arch/arm64/include/asm/unistd32.h > +++ b/arch/arm64/include/asm/unistd32.h > @@ -879,6 +879,8 @@ __SYSCALL(__NR_fspick, sys_fspick) > __SYSCALL(__NR_pidfd_open, sys_pidfd_open) > #define __NR_clone3 435 > __SYSCALL(__NR_clone3, sys_clone3) > +#define __NR_pidfd_getfd 438 > +__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd) > =20 > /* > * Please add new compat syscalls above this comment and update > diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/sys= calls/syscall.tbl > index 36d5faf4c86c..2b11adfc860c 100644 > --- a/arch/ia64/kernel/syscalls/syscall.tbl > +++ b/arch/ia64/kernel/syscalls/syscall.tbl > @@ -356,3 +356,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > # 435 reserved for clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/sys= calls/syscall.tbl > index a88a285a0e5f..44e879e98459 100644 > --- a/arch/m68k/kernel/syscalls/syscall.tbl > +++ b/arch/m68k/kernel/syscalls/syscall.tbl > @@ -435,3 +435,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > # 435 reserved for clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaz= e/kernel/syscalls/syscall.tbl > index 09b0cd7dab0a..7afa00125cc4 100644 > --- a/arch/microblaze/kernel/syscalls/syscall.tbl > +++ b/arch/microblaze/kernel/syscalls/syscall.tbl > @@ -441,3 +441,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > 435 common clone3 sys_clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel= /syscalls/syscall_n32.tbl > index e7c5ab38e403..856d5ba34461 100644 > --- a/arch/mips/kernel/syscalls/syscall_n32.tbl > +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl > @@ -374,3 +374,4 @@ > 433 n32 fspick sys_fspick > 434 n32 pidfd_open sys_pidfd_open > 435 n32 clone3 __sys_clone3 > +438 n32 pidfd_getfd sys_pidfd_getfd > diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel= /syscalls/syscall_n64.tbl > index 13cd66581f3b..2db6075352f3 100644 > --- a/arch/mips/kernel/syscalls/syscall_n64.tbl > +++ b/arch/mips/kernel/syscalls/syscall_n64.tbl > @@ -350,3 +350,4 @@ > 433 n64 fspick sys_fspick > 434 n64 pidfd_open sys_pidfd_open > 435 n64 clone3 __sys_clone3 > +438 n64 pidfd_getfd sys_pidfd_getfd > diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel= /syscalls/syscall_o32.tbl > index 353539ea4140..e9f9d4a9b105 100644 > --- a/arch/mips/kernel/syscalls/syscall_o32.tbl > +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl > @@ -423,3 +423,4 @@ > 433 o32 fspick sys_fspick > 434 o32 pidfd_open sys_pidfd_open > 435 o32 clone3 __sys_clone3 > +438 o32 pidfd_getfd sys_pidfd_getfd > diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel= /syscalls/syscall.tbl > index 285ff516150c..c58c7eb144ca 100644 > --- a/arch/parisc/kernel/syscalls/syscall.tbl > +++ b/arch/parisc/kernel/syscalls/syscall.tbl > @@ -433,3 +433,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > 435 common clone3 sys_clone3_wrapper > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kern= el/syscalls/syscall.tbl > index 43f736ed47f2..707609bfe3ea 100644 > --- a/arch/powerpc/kernel/syscalls/syscall.tbl > +++ b/arch/powerpc/kernel/syscalls/syscall.tbl > @@ -517,3 +517,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > 435 nospu clone3 ppc_clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/sys= calls/syscall.tbl > index 3054e9c035a3..185cd624face 100644 > --- a/arch/s390/kernel/syscalls/syscall.tbl > +++ b/arch/s390/kernel/syscalls/syscall.tbl > @@ -438,3 +438,4 @@ > 433 common fspick sys_fspick sys_fspick > 434 common pidfd_open sys_pidfd_open sys_pidfd_open > 435 common clone3 sys_clone3 sys_clone3 > +438 common pidfd_getfd sys_pidfd_getfd sys_pidfd_getfd > diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscall= s/syscall.tbl > index b5ed26c4c005..88f90895aad8 100644 > --- a/arch/sh/kernel/syscalls/syscall.tbl > +++ b/arch/sh/kernel/syscalls/syscall.tbl > @@ -438,3 +438,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > # 435 reserved for clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/s= yscalls/syscall.tbl > index 8c8cc7537fb2..218df6a2326e 100644 > --- a/arch/sparc/kernel/syscalls/syscall.tbl > +++ b/arch/sparc/kernel/syscalls/syscall.tbl > @@ -481,3 +481,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > # 435 reserved for clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/sysc= alls/syscall_32.tbl > index 15908eb9b17e..9c3101b65e0f 100644 > --- a/arch/x86/entry/syscalls/syscall_32.tbl > +++ b/arch/x86/entry/syscalls/syscall_32.tbl > @@ -440,3 +440,4 @@ > 433 i386 fspick sys_fspick __ia32_sys_fspick > 434 i386 pidfd_open sys_pidfd_open __ia32_sys_pidfd_open > 435 i386 clone3 sys_clone3 __ia32_sys_clone3 > +438 i386 pidfd_getfd sys_pidfd_getfd __ia32_sys_pidfd_getfd > diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/sysc= alls/syscall_64.tbl > index c29976eca4a8..cef85db75a62 100644 > --- a/arch/x86/entry/syscalls/syscall_64.tbl > +++ b/arch/x86/entry/syscalls/syscall_64.tbl > @@ -357,6 +357,7 @@ > 433 common fspick __x64_sys_fspick > 434 common pidfd_open __x64_sys_pidfd_open > 435 common clone3 __x64_sys_clone3/ptregs > +438 common pidfd_getfd __x64_sys_pidfd_getfd > =20 > # > # x32-specific system call numbers start at 512 to avoid cache impact > diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel= /syscalls/syscall.tbl > index 25f4de729a6d..ae15183def12 100644 > --- a/arch/xtensa/kernel/syscalls/syscall.tbl > +++ b/arch/xtensa/kernel/syscalls/syscall.tbl > @@ -406,3 +406,4 @@ > 433 common fspick sys_fspick > 434 common pidfd_open sys_pidfd_open > 435 common clone3 sys_clone3 > +438 common pidfd_getfd sys_pidfd_getfd > diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h > index 2960dedcfde8..62fe706329d1 100644 > --- a/include/linux/syscalls.h > +++ b/include/linux/syscalls.h > @@ -69,6 +69,7 @@ struct rseq; > union bpf_attr; > struct io_uring_params; > struct clone_args; > +struct pidfd_getfd_options; > =20 > #include > #include > @@ -1000,6 +1001,9 @@ asmlinkage long sys_fspick(int dfd, const char __us= er *path, unsigned int flags) > asmlinkage long sys_pidfd_send_signal(int pidfd, int sig, > siginfo_t __user *info, > unsigned int flags); > +asmlinkage long sys_pidfd_getfd(int pidfd, int fd, > + struct pidfd_getfd_options __user *options, > + size_t, usize); > =20 > /* > * Architecture-specific system calls > diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic= /unistd.h > index 1fc8faa6e973..f358488366f6 100644 > --- a/include/uapi/asm-generic/unistd.h > +++ b/include/uapi/asm-generic/unistd.h > @@ -850,9 +850,10 @@ __SYSCALL(__NR_pidfd_open, sys_pidfd_open) > #define __NR_clone3 435 > __SYSCALL(__NR_clone3, sys_clone3) > #endif > +#define __NR_pidfd_getfd 438 > =20 > #undef __NR_syscalls > -#define __NR_syscalls 436 > +#define __NR_syscalls 439 > =20 > /* > * 32 bit systems traditionally used different > diff --git a/include/uapi/linux/pidfd.h b/include/uapi/linux/pidfd.h > new file mode 100644 > index 000000000000..0a3fc922661d > --- /dev/null > +++ b/include/uapi/linux/pidfd.h > @@ -0,0 +1,10 @@ > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ > +#ifndef _UAPI_LINUX_PIDFD_H > +#define _UAPI_LINUX_PIDFD_H > + > +struct pidfd_getfd_options {}; Are empty structs well-defined in C (from memory, some compilers make them non-zero in size)? Since we probably plan to add a flags field in the future anyway, why not just have a __u64 flags which must be zeroed? > + > +#define PIDFD_GETFD_OPTIONS_SIZE_VER0 0 > +#define PIDFD_GETFD_OPTIONS_SIZE_LATEST PIDFD_GETFD_OPTIONS_SIZE_VER0 > + > +#endif /* _UAPI_LINUX_PIDFD_H */ > diff --git a/kernel/pid.c b/kernel/pid.c > index 2278e249141d..2a9cb4be383f 100644 > --- a/kernel/pid.c > +++ b/kernel/pid.c > @@ -42,6 +42,7 @@ > #include > #include > #include > +#include > =20 > struct pid init_struct_pid =3D { > .count =3D REFCOUNT_INIT(1), > @@ -578,3 +579,117 @@ void __init pid_idr_init(void) > init_pid_ns.pid_cachep =3D KMEM_CACHE(pid, > SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT); > } > + > +static struct file *__pidfd_getfd_fget_task(struct task_struct *task, u3= 2 fd) > +{ > + struct file *file; > + int ret; > + > + ret =3D mutex_lock_killable(&task->signal->cred_guard_mutex); > + if (ret) > + return ERR_PTR(ret); > + > + if (!ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS)) { > + file =3D ERR_PTR(-EPERM); > + goto out; > + } > + > + file =3D fget_task(task, fd); > + if (!file) > + file =3D ERR_PTR(-EBADF); > + > +out: > + mutex_unlock(&task->signal->cred_guard_mutex); > + return file; > +} > + > +static long pidfd_getfd(struct pid *pid, u32 fd) > +{ > + struct task_struct *task; > + struct file *file; > + int ret, retfd; > + > + task =3D get_pid_task(pid, PIDTYPE_PID); > + if (!task) > + return -ESRCH; > + > + file =3D __pidfd_getfd_fget_task(task, fd); > + put_task_struct(task); > + if (IS_ERR(file)) > + return PTR_ERR(file); > + > + retfd =3D get_unused_fd_flags(O_CLOEXEC); > + if (retfd < 0) { > + ret =3D retfd; > + goto out; > + } > + > + /* > + * security_file_receive must come last since it may have side effects > + * and cannot be reversed. > + */ > + ret =3D security_file_receive(file); > + if (ret) > + goto out_put_fd; > + > + fd_install(retfd, file); > + return retfd; > + > +out_put_fd: > + put_unused_fd(retfd); > +out: > + fput(file); > + return ret; > +} > + > +/** > + * sys_pidfd_getfd() - Get a file descriptor from another process > + * > + * @pidfd: file descriptor of the process > + * @fd: the file descriptor number to get > + * @options: options on how to get the fd > + * @usize: the size of options > + * > + * This syscall requires that the process has the ability to ptrace the > + * process represented by the pidfd. It will return a duplicated version > + * of the file descriptor on success. The process who which is having > + * its file descriptor taken is otherwise unaffected. If options is NULL > + * it is ignored along with usize. > + * > + * Return: On success, a file descriptor with cloexec is returned. > + * On error, a negative errno number will be returned. > + */ > +SYSCALL_DEFINE4(pidfd_getfd, int, pidfd, int, fd, > + struct pidfd_getfd_options __user *, options, size_t, usize) > +{ > + struct pid *pid; > + struct fd f; > + int ret; > + > + BUILD_BUG_ON(sizeof(struct pidfd_getfd_options) !=3D PIDFD_GETFD_OPTION= S_SIZE_LATEST); > + > + /* > + * options is currently unused, verify it's unset or if it is set, > + * ensure that size is 0. > + * > + * In the future, this will need to adopt copy_struct_from_user. > + */ > + if (options && usize > PIDFD_GETFD_OPTIONS_SIZE_VER0) > + return -E2BIG; I wouldn't suggest doing this. I understand that this is simpler, but it will cause problems once we add a field to pidfd_getfd_options -- newer programs compiled with a larger struct won't work on older kernels with this check (even if the struct is completely zeroed). If copy_struct_from_user() doesn't work with usize =3D=3D 0, I would *much* prefer a patch which fixes that (effectively copy_struct_from_user() with a usize =3D=3D 0 should just be a call to check_zeroed_user()). > + f =3D fdget(pidfd); > + if (!f.file) > + return -EBADF; > + > + pid =3D pidfd_pid(f.file); > + if (IS_ERR(pid)) { > + ret =3D PTR_ERR(pid); > + goto out; > + } > + > + ret =3D pidfd_getfd(pid, fd); > + > +out: > + fdput(f); > + return ret; > +} > --=20 > 2.20.1 --=20 Aleksa Sarai Senior Software Engineer (Containers) SUSE Linux GmbH --gr477xaubyeqz5v6 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEXzbGxhtUYBJKdfWmnhiqJn3bjbQFAl39ZvAACgkQnhiqJn3b jbTPjA//ZRGs5MasCrBGtgSIyPnlbBCOB7ZplOAQz9ekgBoeo4opgloXs5kAxFu4 ynktbIn6h7+kZGswEITX6HnViNqQ80Ju4ssBM45FyGj+XoONJmOcwYfW4R7r+K2J OBGURslzui5lf8jdhVWN8MwX3mrfFxU8mKExtXYMROkuKFRvs9I185iW3+yEz2HQ javVuywj6XgPK0j1ss/3qrdAs83vlZVZEgM0JV6pEDt8qpdNMRvIOpsTn3UYhh4j xZuKUZjY+uDgLdEau6HLS38kM5a2XknoXcV96LE3yPZp/mXMvwWHxUkipyE6bsIW g1vg9RILvnXNT+zZSDm147mdTNDzv3U+yy/c7yGNYCD3lee2dF2QSdlZ4VthdREp a30Gkg4a5ZTmIgseiSZ+Uxy4HJKJn4uDoQe7/e2dmFIkdzy2JdsSqEu1xuWdK0PE Q43LYs+ZCXx86CCxd4d12FJh+fFw+eV6cV62gWPIzPxilkiQu8xdnkQFolMSBxFA UONkgLxSMGEhBdbVwnsaFgv//P+H8LRbEPUi2ad9rtigh0/tx/QFgnxytGyGonZq QTAiq9qs52yDMluoh3YJggmq5XTKWqP+ma2OYx6ALLV7sjGWj2+OXFz2PfcPZ1rQ JyFHj8KSAcB0jdQVGHspsqGyX9ht1dH62arqznWIpTqoekj1nR0= =dkeU -----END PGP SIGNATURE----- --gr477xaubyeqz5v6--