Backport patches from upstream community
(cherry picked from commit c25f8328883401b7cfb59dbd6a1358bd780693d1)
This commit is contained in:
fly_fzc
openeuler-sync-bot
parent
fe2f22cd38
commit
577b6a6145
225
backport-Avoid-using-ioctl-TIOCNOTTY-in-the-monitor.patch
Normal file
225
backport-Avoid-using-ioctl-TIOCNOTTY-in-the-monitor.patch
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@ -0,0 +1,225 @@
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From a2d01a957d31e133c37d77ae149527f9483e4f19 Mon Sep 17 00:00:00 2001
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From: "Todd C. Miller" <Todd.Miller@sudo.ws>
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Date: Sun, 28 Apr 2024 10:28:32 -0600
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Subject: [PATCH] Avoid using ioctl(TIOCNOTTY) in the monitor.
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We don't need to revoke the terminal in the monitor, just signal
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the foreground process group. This is more portable and has the
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same effect as ioctl(TIOCNOTTY) would on Linux. Since we now signal
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the command from the monitor, there is no reason to forward SIGHUP
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from the kernel. GitHub issue #367.
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Reference:https://github.com/sudo-project/sudo/commit/a2d01a957d31e133c37d77ae149527f9483e4f19
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Conflict:NA
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---
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src/exec_monitor.c | 84 +++++++++++++++++++++++++---------------------
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src/exec_pty.c | 31 ++++++++++-------
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src/sudo.h | 2 +-
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3 files changed, 64 insertions(+), 53 deletions(-)
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diff --git a/src/exec_monitor.c b/src/exec_monitor.c
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index c570b5d86..524f5c8c9 100644
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--- a/src/exec_monitor.c
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+++ b/src/exec_monitor.c
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@@ -1,7 +1,7 @@
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/*
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* SPDX-License-Identifier: ISC
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*
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- * Copyright (c) 2009-2023 Todd C. Miller <Todd.Miller@sudo.ws>
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+ * Copyright (c) 2009-2024 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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@@ -310,6 +310,48 @@ mon_errsock_cb(int fd, int what, void *v)
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debug_return;
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}
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+/*
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+ * Called when the user's terminal has gone away but before our pty is
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+ * actually revoked. We simulate the effect of ioctl(TIOCNOTTY) on Linux
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+ * by sending SIGHUP and SIGCONT to the foreground process group.
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+ */
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+static void
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+mon_handle_revoke(int fd, pid_t cmnd_pid, struct command_status *cstat)
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+{
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+ debug_decl(mon_handle_revoke, SUDO_DEBUG_EXEC);
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+
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+ /*
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+ * Signal the foreground process group and the command's process group
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+ * (if different). We must do this before the pty is revoked be the
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+ * main sudo process so we can determine the foreground process group.
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+ * Otherwise, if the foreground process group is different from the
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+ * command's process group it will not be signaled.
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+ */
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+ if (io_fds[SFD_FOLLOWER] != -1) {
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+ const pid_t pgrp = tcgetpgrp(io_fds[SFD_FOLLOWER]);
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+ if (pgrp != -1 && pgrp != cmnd_pid) {
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+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "%s: killpg(%d, SIGHUP)",
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+ __func__, pgrp);
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+ killpg(pgrp, SIGHUP);
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+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "%s: killpg(%d, SIGCONT)",
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+ __func__, pgrp);
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+ killpg(pgrp, SIGCONT);
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+ }
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+ }
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+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "%s: killpg(%d, SIGHUP)",
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+ __func__, cmnd_pid);
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+ killpg(cmnd_pid, SIGHUP);
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+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "%s: killpg(%d, SIGCONT)",
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+ __func__, cmnd_pid);
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+ killpg(cmnd_pid, SIGCONT);
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+
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+ /*
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+ * Now that the running command as been signaled, tell the
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+ * parent it is OK to close the pty leader, revoking the pty.
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+ */
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+ send_status(fd, cstat);
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+}
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+
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static void
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mon_backchannel_cb(int fd, int what, void *v)
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{
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@@ -337,44 +379,8 @@ mon_backchannel_cb(int fd, int what, void *v)
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sudo_ev_loopbreak(mc->evbase);
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} else {
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switch (cstmp.type) {
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- case CMD_IOCTL:
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- if (cstmp.val != TIOCNOTTY) {
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- sudo_warnx(U_("unexpected ioctl on backchannel: %d"),
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- cstmp.val);
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- } else if (io_fds[SFD_FOLLOWER] != -1) {
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- int result, ttyfd;
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-
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- /*
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- * Parent asks us to revoke the terminal when the
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- * user's terminal goes away. Doing this in the
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- * monitor allows the foreground command to receive
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- * SIGHUP before the terminal is revoked.
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- */
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- result = ioctl(io_fds[SFD_FOLLOWER], TIOCNOTTY, NULL);
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- if (result == -1) {
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- sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
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- "%s: unable to revoke follower pty", __func__);
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- ttyfd = open(_PATH_TTY, O_RDWR);
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- if (ttyfd != -1) {
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- result = ioctl(ttyfd, TIOCNOTTY, NULL);
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- if (result == -1) {
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- sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
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- "%s: unable to revoke controlling tty",
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- __func__);
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- }
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- close(ttyfd);
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- } else {
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- sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
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- "%s: unable to open %s", __func__, _PATH_TTY);
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- }
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- }
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- if (result == 0) {
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- sudo_debug_printf(SUDO_DEBUG_INFO,
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- "%s: revoked controlling tty for session", __func__);
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- }
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- /* Now tell the parent to close the pty leader. */
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- send_status(fd, &cstmp);
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- }
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+ case CMD_REVOKE:
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+ mon_handle_revoke(fd, mc->cmnd_pid, &cstmp);
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break;
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case CMD_SIGNO:
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deliver_signal(mc, cstmp.val, true);
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diff --git a/src/exec_pty.c b/src/exec_pty.c
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index fff9b8f1e..4dd5915ed 100644
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--- a/src/exec_pty.c
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+++ b/src/exec_pty.c
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@@ -1,7 +1,7 @@
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/*
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* SPDX-License-Identifier: ISC
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*
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- * Copyright (c) 2009-2023 Todd C. Miller <Todd.Miller@sudo.ws>
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+ * Copyright (c) 2009-2024 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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@@ -385,13 +385,13 @@ read_callback(int fd, int what, void *v)
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/* If writer already consumed the buffer, close it too. */
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if (iob->wevent != NULL && iob->off == iob->len) {
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/*
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- * Don't close the pty leader, it will invalidate the pty.
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- * We ask the monitor to revoke the pty nicely using TIOCNOTTY.
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+ * Don't close the pty leader yet, it will invalidate the pty.
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+ * We ask the monitor to signal the running process first.
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*/
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const int wfd = sudo_ev_get_fd(iob->wevent);
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if (wfd == io_fds[SFD_LEADER]) {
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sudo_debug_printf(SUDO_DEBUG_NOTICE, "user's tty revoked");
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- send_command_status(iob->ec, CMD_IOCTL, TIOCNOTTY);
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+ send_command_status(iob->ec, CMD_REVOKE, 0);
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} else {
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safe_close(wfd);
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}
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@@ -474,12 +474,12 @@ write_callback(int fd, int what, void *v)
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if (iob->revent != NULL) {
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/*
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* Don't close the pty leader, it will invalidate the pty.
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- * We ask the monitor to revoke the pty nicely using TIOCNOTTY.
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+ * We ask the monitor to signal the running process first.
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*/
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const int rfd = sudo_ev_get_fd(iob->revent);
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if (rfd == io_fds[SFD_LEADER]) {
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sudo_debug_printf(SUDO_DEBUG_NOTICE, "user's tty revoked");
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- send_command_status(iob->ec, CMD_IOCTL, TIOCNOTTY);
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+ send_command_status(iob->ec, CMD_REVOKE, 0);
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} else {
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safe_close(rfd);
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}
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@@ -684,15 +684,11 @@ backchannel_cb(int fd, int what, void *v)
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sudo_ev_loopbreak(ec->evbase);
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*ec->cstat = cstat;
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break;
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- case CMD_IOCTL:
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- if (cstat.val != TIOCNOTTY) {
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- sudo_warnx(U_("unexpected ioctl on backchannel: %d"),
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- cstat.val);
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- } else if (io_fds[SFD_LEADER] != -1) {
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+ case CMD_REVOKE:
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+ if (io_fds[SFD_LEADER] != -1) {
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/*
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* Monitor requests that we revoke the user's terminal.
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- * This must happen after the monitor has used TIOCNOTTY
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- * to invalidate the session and gracefully kill the
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+ * This must happen after the monitor has signaled the
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* controlling terminal's process group.
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*/
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close(io_fds[SFD_LEADER]);
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@@ -855,6 +851,15 @@ signal_cb_pty(int signo, int what, void *v)
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case SIGWINCH:
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sync_ttysize(ec);
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break;
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+ case SIGHUP:
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+ /*
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+ * Avoid forwarding SIGHUP sent by the kernel, it probably means
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+ * that the user's terminal was revoked. When we detect that the
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+ * terminal has been revoked, the monitor will send SIGHUP itself.
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+ */
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+ if (!USER_SIGNALED(sc->siginfo))
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+ break;
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+ FALLTHROUGH;
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default:
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/*
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* Do not forward signals sent by the command itself or a member of the
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diff --git a/src/sudo.h b/src/sudo.h
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index ca245ca68..d3122ef4e 100644
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--- a/src/sudo.h
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+++ b/src/sudo.h
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@@ -225,7 +225,7 @@ struct command_status {
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#define CMD_WSTATUS 2
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#define CMD_SIGNO 3
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#define CMD_PID 4
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-#define CMD_IOCTL 5
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+#define CMD_REVOKE 5
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int type;
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int val;
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};
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--
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2.33.0
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@ -0,0 +1,212 @@
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From 41978a56e042977923c1a55191b887218c536145 Mon Sep 17 00:00:00 2001
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|
From: "Todd C. Miller" <Todd.Miller@sudo.ws>
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Date: Sat, 27 Apr 2024 18:53:50 -0600
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Subject: [PATCH] If user's tty goes away, tell monitor to revoke the tty in
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its session.
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|
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Previously, we would simply close the pty leader in the main sudo
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process. This had the effect of revoking the pty, but the foreground
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|
process would not necessarily receive SIGHUP. By using TIOCNOTTY
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|
in the monitor, the running command has a better chance of getting
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|
SIGHUP. Once the monitor has revoked the pty, the main sudo process
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|
will close the pty leader, invalidating the pty. GitHub issue #367.
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|
|
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|
Reference:https://github.com/sudo-project/sudo/commit/41978a56e042977923c1a55191b887218c536145
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|
Conflict:NA
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|
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|
---
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|
src/exec_monitor.c | 48 +++++++++++++++++++++++++++++++++++--
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|
src/exec_pty.c | 60 ++++++++++++++++++++++++++++++++++++----------
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src/sudo.h | 1 +
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|
3 files changed, 95 insertions(+), 14 deletions(-)
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diff --git a/src/exec_monitor.c b/src/exec_monitor.c
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|
index 05f5f8cd1..c570b5d86 100644
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|
--- a/src/exec_monitor.c
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+++ b/src/exec_monitor.c
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|
@@ -118,6 +118,8 @@ deliver_signal(struct monitor_closure *mc, int signo, bool from_parent)
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|
/* NOTREACHED */
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|
default:
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|
/* Relay signal to command. */
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|
+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "%s: killpg(%d, %d)",
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|
+ __func__, (int)mc->cmnd_pid, signo);
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|
killpg(mc->cmnd_pid, signo);
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|
break;
|
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|
}
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|
@@ -334,11 +336,53 @@ mon_backchannel_cb(int fd, int what, void *v)
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|
mc->cstat->val = n ? EIO : ECONNRESET;
|
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|
sudo_ev_loopbreak(mc->evbase);
|
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|
} else {
|
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|
- if (cstmp.type == CMD_SIGNO) {
|
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|
+ switch (cstmp.type) {
|
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|
+ case CMD_IOCTL:
|
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|
+ if (cstmp.val != TIOCNOTTY) {
|
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|
+ sudo_warnx(U_("unexpected ioctl on backchannel: %d"),
|
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|
+ cstmp.val);
|
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|
+ } else if (io_fds[SFD_FOLLOWER] != -1) {
|
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|
+ int result, ttyfd;
|
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|
+
|
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|
+ /*
|
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|
+ * Parent asks us to revoke the terminal when the
|
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|
+ * user's terminal goes away. Doing this in the
|
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|
+ * monitor allows the foreground command to receive
|
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|
+ * SIGHUP before the terminal is revoked.
|
||||||
|
+ */
|
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|
+ result = ioctl(io_fds[SFD_FOLLOWER], TIOCNOTTY, NULL);
|
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|
+ if (result == -1) {
|
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|
+ sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
|
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|
+ "%s: unable to revoke follower pty", __func__);
|
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|
+ ttyfd = open(_PATH_TTY, O_RDWR);
|
||||||
|
+ if (ttyfd != -1) {
|
||||||
|
+ result = ioctl(ttyfd, TIOCNOTTY, NULL);
|
||||||
|
+ if (result == -1) {
|
||||||
|
+ sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
|
||||||
|
+ "%s: unable to revoke controlling tty",
|
||||||
|
+ __func__);
|
||||||
|
+ }
|
||||||
|
+ close(ttyfd);
|
||||||
|
+ } else {
|
||||||
|
+ sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
|
||||||
|
+ "%s: unable to open %s", __func__, _PATH_TTY);
|
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|
+ }
|
||||||
|
+ }
|
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|
+ if (result == 0) {
|
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|
+ sudo_debug_printf(SUDO_DEBUG_INFO,
|
||||||
|
+ "%s: revoked controlling tty for session", __func__);
|
||||||
|
+ }
|
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|
+ /* Now tell the parent to close the pty leader. */
|
||||||
|
+ send_status(fd, &cstmp);
|
||||||
|
+ }
|
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|
+ break;
|
||||||
|
+ case CMD_SIGNO:
|
||||||
|
deliver_signal(mc, cstmp.val, true);
|
||||||
|
- } else {
|
||||||
|
+ break;
|
||||||
|
+ default:
|
||||||
|
sudo_warnx(U_("unexpected reply type on backchannel: %d"),
|
||||||
|
cstmp.type);
|
||||||
|
+ break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
debug_return;
|
||||||
|
diff --git a/src/exec_pty.c b/src/exec_pty.c
|
||||||
|
index 6c0f7583e..fff9b8f1e 100644
|
||||||
|
--- a/src/exec_pty.c
|
||||||
|
+++ b/src/exec_pty.c
|
||||||
|
@@ -61,6 +61,7 @@ static struct exec_closure pty_ec;
|
||||||
|
|
||||||
|
static void sync_ttysize(struct exec_closure *ec);
|
||||||
|
static void schedule_signal(struct exec_closure *ec, int signo);
|
||||||
|
+static void send_command_status(struct exec_closure *ec, int type, int val);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Allocate a pty if /dev/tty is a tty.
|
||||||
|
@@ -383,8 +384,18 @@ read_callback(int fd, int what, void *v)
|
||||||
|
ev_free_by_fd(evbase, fd);
|
||||||
|
/* If writer already consumed the buffer, close it too. */
|
||||||
|
if (iob->wevent != NULL && iob->off == iob->len) {
|
||||||
|
- safe_close(sudo_ev_get_fd(iob->wevent));
|
||||||
|
- ev_free_by_fd(evbase, sudo_ev_get_fd(iob->wevent));
|
||||||
|
+ /*
|
||||||
|
+ * Don't close the pty leader, it will invalidate the pty.
|
||||||
|
+ * We ask the monitor to revoke the pty nicely using TIOCNOTTY.
|
||||||
|
+ */
|
||||||
|
+ const int wfd = sudo_ev_get_fd(iob->wevent);
|
||||||
|
+ if (wfd == io_fds[SFD_LEADER]) {
|
||||||
|
+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "user's tty revoked");
|
||||||
|
+ send_command_status(iob->ec, CMD_IOCTL, TIOCNOTTY);
|
||||||
|
+ } else {
|
||||||
|
+ safe_close(wfd);
|
||||||
|
+ }
|
||||||
|
+ ev_free_by_fd(evbase, wfd);
|
||||||
|
iob->off = iob->len = 0;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
@@ -461,8 +472,18 @@ write_callback(int fd, int what, void *v)
|
||||||
|
iob->len - iob->off, fd);
|
||||||
|
/* Close reader if there is one. */
|
||||||
|
if (iob->revent != NULL) {
|
||||||
|
- safe_close(sudo_ev_get_fd(iob->revent));
|
||||||
|
- ev_free_by_fd(evbase, sudo_ev_get_fd(iob->revent));
|
||||||
|
+ /*
|
||||||
|
+ * Don't close the pty leader, it will invalidate the pty.
|
||||||
|
+ * We ask the monitor to revoke the pty nicely using TIOCNOTTY.
|
||||||
|
+ */
|
||||||
|
+ const int rfd = sudo_ev_get_fd(iob->revent);
|
||||||
|
+ if (rfd == io_fds[SFD_LEADER]) {
|
||||||
|
+ sudo_debug_printf(SUDO_DEBUG_NOTICE, "user's tty revoked");
|
||||||
|
+ send_command_status(iob->ec, CMD_IOCTL, TIOCNOTTY);
|
||||||
|
+ } else {
|
||||||
|
+ safe_close(rfd);
|
||||||
|
+ }
|
||||||
|
+ ev_free_by_fd(evbase, rfd);
|
||||||
|
}
|
||||||
|
safe_close(fd);
|
||||||
|
ev_free_by_fd(evbase, fd);
|
||||||
|
@@ -656,6 +677,28 @@ backchannel_cb(int fd, int what, void *v)
|
||||||
|
case sizeof(cstat):
|
||||||
|
/* Check command status. */
|
||||||
|
switch (cstat.type) {
|
||||||
|
+ case CMD_ERRNO:
|
||||||
|
+ /* Monitor was unable to execute command or broken pipe. */
|
||||||
|
+ sudo_debug_printf(SUDO_DEBUG_INFO, "errno from monitor: %s",
|
||||||
|
+ strerror(cstat.val));
|
||||||
|
+ sudo_ev_loopbreak(ec->evbase);
|
||||||
|
+ *ec->cstat = cstat;
|
||||||
|
+ break;
|
||||||
|
+ case CMD_IOCTL:
|
||||||
|
+ if (cstat.val != TIOCNOTTY) {
|
||||||
|
+ sudo_warnx(U_("unexpected ioctl on backchannel: %d"),
|
||||||
|
+ cstat.val);
|
||||||
|
+ } else if (io_fds[SFD_LEADER] != -1) {
|
||||||
|
+ /*
|
||||||
|
+ * Monitor requests that we revoke the user's terminal.
|
||||||
|
+ * This must happen after the monitor has used TIOCNOTTY
|
||||||
|
+ * to invalidate the session and gracefully kill the
|
||||||
|
+ * controlling terminal's process group.
|
||||||
|
+ */
|
||||||
|
+ close(io_fds[SFD_LEADER]);
|
||||||
|
+ io_fds[SFD_LEADER] = -1;
|
||||||
|
+ }
|
||||||
|
+ break;
|
||||||
|
case CMD_PID:
|
||||||
|
ec->cmnd_pid = cstat.val;
|
||||||
|
sudo_debug_printf(SUDO_DEBUG_INFO, "executed %s, pid %d",
|
||||||
|
@@ -693,13 +736,6 @@ backchannel_cb(int fd, int what, void *v)
|
||||||
|
*ec->cstat = cstat;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
- case CMD_ERRNO:
|
||||||
|
- /* Monitor was unable to execute command or broken pipe. */
|
||||||
|
- sudo_debug_printf(SUDO_DEBUG_INFO, "errno from monitor: %s",
|
||||||
|
- strerror(cstat.val));
|
||||||
|
- sudo_ev_loopbreak(ec->evbase);
|
||||||
|
- *ec->cstat = cstat;
|
||||||
|
- break;
|
||||||
|
}
|
||||||
|
/* Keep reading command status messages until EAGAIN or EOF. */
|
||||||
|
break;
|
||||||
|
@@ -1382,7 +1418,7 @@ exec_pty(struct command_details *details,
|
||||||
|
if (sudo_ev_dispatch(ec->evbase) == -1)
|
||||||
|
sudo_warn("%s", U_("error in event loop"));
|
||||||
|
if (sudo_ev_got_break(ec->evbase)) {
|
||||||
|
- /* error from callback or monitor died */
|
||||||
|
+ /* error from callback */
|
||||||
|
sudo_debug_printf(SUDO_DEBUG_ERROR, "event loop exited prematurely");
|
||||||
|
/* XXX: no good way to know if we should terminate the command. */
|
||||||
|
if (cstat->val == CMD_INVALID && ec->cmnd_pid != -1) {
|
||||||
|
diff --git a/src/sudo.h b/src/sudo.h
|
||||||
|
index a7450dca9..ca245ca68 100644
|
||||||
|
--- a/src/sudo.h
|
||||||
|
+++ b/src/sudo.h
|
||||||
|
@@ -225,6 +225,7 @@ struct command_status {
|
||||||
|
#define CMD_WSTATUS 2
|
||||||
|
#define CMD_SIGNO 3
|
||||||
|
#define CMD_PID 4
|
||||||
|
+#define CMD_IOCTL 5
|
||||||
|
int type;
|
||||||
|
int val;
|
||||||
|
};
|
||||||
|
--
|
||||||
|
2.33.0
|
||||||
|
|
||||||
@ -1,6 +1,6 @@
|
|||||||
Name: sudo
|
Name: sudo
|
||||||
Version: 1.9.15p5
|
Version: 1.9.15p5
|
||||||
Release: 1
|
Release: 2
|
||||||
Summary: Allows restricted root access for specified users
|
Summary: Allows restricted root access for specified users
|
||||||
License: ISC
|
License: ISC
|
||||||
URL: https://www.sudo.ws
|
URL: https://www.sudo.ws
|
||||||
@ -11,6 +11,8 @@ Source2: sudo
|
|||||||
Source3: sudo-i
|
Source3: sudo-i
|
||||||
|
|
||||||
Patch0: Fix-compilation-error-on-sw64-arch.patch
|
Patch0: Fix-compilation-error-on-sw64-arch.patch
|
||||||
|
Patch1: backport-If-user-s-tty-goes-away-tell-monitor-to-revoke-the-t.patch
|
||||||
|
Patch2: backport-Avoid-using-ioctl-TIOCNOTTY-in-the-monitor.patch
|
||||||
|
|
||||||
Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
|
Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
|
||||||
Requires: pam
|
Requires: pam
|
||||||
@ -155,6 +157,9 @@ chrpath -d $RPM_BUILD_ROOT/usr/libexec/sudo/*
|
|||||||
%exclude %{_pkgdocdir}/ChangeLog
|
%exclude %{_pkgdocdir}/ChangeLog
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Fri Apr 18 2025 fuanan <fuanan3@h-partners.com> - 1.9.15p5-2
|
||||||
|
- Backport patches from upstream community
|
||||||
|
|
||||||
* Mon Jan 8 2024 wangqingsan <wangqingsan@huawei.com> - 1.9.15p5-1
|
* Mon Jan 8 2024 wangqingsan <wangqingsan@huawei.com> - 1.9.15p5-1
|
||||||
- Upgrade to 1.9.15p5
|
- Upgrade to 1.9.15p5
|
||||||
|
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user