journal,network,timesync: fix segfault on 32bit timeval/timespec systems

Fixes #20741.

src/basic/fileio.c

@@ -433,6 +433,11 @@ int read_virtual_file(const char *filename, size_t max_size, char **ret_contents
                         }
 
                         n_retries--;
+                } else if (n_retries > 1) {
+                        /* Files in /proc are generally smaller than the page size so let's start with a page size
+                         * buffer from malloc and only use the max buffer on the final try. */
+                        size = MIN3(page_size() - 1, READ_VIRTUAL_BYTES_MAX, max_size);
+                        n_retries = 1;
                 } else {
                         size = MIN(READ_VIRTUAL_BYTES_MAX, max_size);
                         n_retries = 0;

src/journal/journald-server.c

@@ -1267,11 +1267,14 @@ int server_process_datagram(
         /* We use NAME_MAX space for the SELinux label here. The kernel currently enforces no limit, but
          * according to suggestions from the SELinux people this will change and it will probably be
          * identical to NAME_MAX. For now we use that, but this should be updated one day when the final
-         * limit is known. */
+         * limit is known.
+         *
+         * Here, we need to explicitly initialize the buffer with zero, as glibc has a bug in
+         * __convert_scm_timestamps(), which assumes the buffer is initialized. See #20741. */
         CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred)) +
                          CMSG_SPACE_TIMEVAL +
                          CMSG_SPACE(sizeof(int)) + /* fd */
-                         CMSG_SPACE(NAME_MAX) /* selinux label */) control;
+                         CMSG_SPACE(NAME_MAX) /* selinux label */) control = {};
 
         union sockaddr_union sa = {};
 

src/libsystemd-network/icmp6-util.c

@@ -148,8 +148,9 @@ int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
 int icmp6_receive(int fd, void *buffer, size_t size, struct in6_addr *ret_dst,
                   triple_timestamp *ret_timestamp) {
 
+        /* This needs to be initialized with zero. See #20741. */
         CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(int)) + /* ttl */
-                         CMSG_SPACE_TIMEVAL) control;
+                         CMSG_SPACE_TIMEVAL) control = {};
         struct iovec iov = {};
         union sockaddr_union sa = {};
         struct msghdr msg = {

src/timesync/timesyncd-manager.c

@@ -416,7 +416,8 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
                 .iov_base = &ntpmsg,
                 .iov_len = sizeof(ntpmsg),
         };
-        CMSG_BUFFER_TYPE(CMSG_SPACE_TIMESPEC) control;
+        /* This needs to be initialized with zero. See #20741. */
+        CMSG_BUFFER_TYPE(CMSG_SPACE_TIMESPEC) control = {};
         union sockaddr_union server_addr;
         struct msghdr msghdr = {
                 .msg_iov = &iov,

test/TEST-64-UDEV-STORAGE/test.sh

@@ -1,5 +1,13 @@
 #!/usr/bin/env bash
 # vi: ts=4 sw=4 tw=0 et:
+#
+# TODO:
+#   * iSCSI
+#   * LVM over iSCSI (?)
+#   * SW raid (mdadm)
+#   * LUKS -> MD (mdadm) -> LVM
+#   * BTRFS
+#   * MD BTRFS
 set -e
 
 TEST_DESCRIPTION="systemd-udev storage tests"
@@ -30,6 +38,11 @@ test_append_files() {
             install_multipath
         fi
 
+        # Configure LVM
+        if command -v lvm; then
+            install_lvm
+        fi
+
         for i in {0..127}; do
             dd if=/dev/zero of="${TESTDIR:?}/disk$i.img" bs=1M count=1
             echo "device$i" >"${TESTDIR:?}/disk$i.img"
@@ -246,6 +259,31 @@ testcase_simultaneous_events() {
     test_run_one "${1:?}"
 }
 
+testcase_lvm_basic() {
+    if ! command -v lvm; then
+        echo "Missing lvm tools, skipping the test..."
+        return 77
+    fi
+
+    local qemu_opts=("-device ahci,id=ahci0")
+    local diskpath
+
+    # Attach 4 SATA disks to the VM (and set their model and serial fields
+    # to something predictable, so we can refer to them later)
+    for i in {0..3}; do
+        diskpath="${TESTDIR:?}/lvmbasic${i}.img"
+        dd if=/dev/zero of="$diskpath" bs=1M count=32
+        qemu_opts+=(
+            "-device ide-hd,bus=ahci0.$i,drive=drive$i,model=foobar,serial=deadbeeflvm$i"
+            "-drive format=raw,cache=unsafe,file=$diskpath,if=none,id=drive$i"
+        )
+    done
+
+    KERNEL_APPEND="systemd.setenv=TEST_FUNCTION_NAME=${FUNCNAME[0]} ${USER_KERNEL_APPEND:-}"
+    QEMU_OPTIONS="${qemu_opts[*]} ${USER_QEMU_OPTIONS:-}"
+    test_run_one "${1:?}"
+}
+
 # Allow overriding which tests should be run from the "outside", useful for manual
 # testing (make -C test/... TESTCASES="testcase1 testcase2")
 if [[ -v "TESTCASES" && -n "$TESTCASES" ]]; then

test/test-functions

@@ -410,7 +410,7 @@ run_qemu() {
     fi
 
     kernel_params+=(
-        "root=/dev/sda1"
+        "root=LABEL=systemd_boot"
         "rw"
         "raid=noautodetect"
         "rd.luks=0"
@@ -896,6 +896,7 @@ install_modules() {
 install_dmevent() {
     instmods dm_crypt =crypto
     inst_binary dmeventd
+    image_install "${ROOTLIBDIR:?}"/system/dm-event.{service,socket}
     if get_bool "$LOOKS_LIKE_DEBIAN"; then
         # dmsetup installs 55-dm and 60-persistent-storage-dm on Debian/Ubuntu
         # and since buster/bionic 95-dm-notify.rules
@@ -935,6 +936,20 @@ install_multipath() {
     fi
 }
 
+install_lvm() {
+    image_install lvm
+    image_install "${ROOTLIBDIR:?}"/system/lvm2-lvmpolld.{service,socket}
+    image_install "${ROOTLIBDIR:?}"/system/{blk-availability,lvm2-monitor,lvm2-pvscan@}.service
+    image_install "${ROOTLIBDIR:?}"/system-generators/lvm2-activation-generator
+    image_install -o "/lib/tmpfiles.d/lvm2.conf"
+    if get_bool "$LOOKS_LIKE_DEBIAN"; then
+        inst_rules 56-lvm.rules 69-lvm-metad.rules
+    else
+        inst_rules 11-dm-lvm.rules 69-dm-lvm-metad.rules
+    fi
+    mkdir -p "${initdir:?}/etc/lvm"
+}
+
 install_compiled_systemd() {
     dinfo "Install compiled systemd"
 
@@ -1120,9 +1135,9 @@ EOF
 
     udevadm settle
 
-    local label=(-L systemd)
+    local label=(-L systemd_boot)
     # mkfs.reiserfs doesn't know -L. so, use --label instead
-    [[ "$FSTYPE" == "reiserfs" ]] && label=(--label systemd)
+    [[ "$FSTYPE" == "reiserfs" ]] && label=(--label systemd_boot)
     if ! mkfs -t "${FSTYPE}" "${label[@]}" "${LOOPDEV}p1" -q; then
         dfatal "Failed to mkfs -t ${FSTYPE}"
         exit 1

test/units/testsuite-17.01.sh

@@ -6,7 +6,7 @@ mkdir -p /run/udev/rules.d/
 
 rm -f /run/udev/rules.d/50-testsuite.rules
 udevadm control --reload
-udevadm trigger /dev/sda
+udevadm trigger --settle /dev/sda
 
 while : ; do
     (
@@ -24,7 +24,7 @@ SUBSYSTEM=="block", KERNEL=="sda", OPTIONS="log_level=debug"
 ACTION!="remove", SUBSYSTEM=="block", KERNEL=="sda", ENV{SYSTEMD_WANTS}="foobar.service"
 EOF
 udevadm control --reload
-udevadm trigger /dev/sda
+udevadm trigger --settle /dev/sda
 
 while : ; do
     (
@@ -42,7 +42,7 @@ SUBSYSTEM=="block", KERNEL=="sda", OPTIONS="log_level=debug"
 ACTION!="remove", SUBSYSTEM=="block", KERNEL=="sda", ENV{SYSTEMD_WANTS}="waldo.service"
 EOF
 udevadm control --reload
-udevadm trigger /dev/sda
+udevadm trigger --settle /dev/sda
 
 while : ; do
     (
@@ -58,7 +58,7 @@ done
 rm /run/udev/rules.d/50-testsuite.rules
 
 udevadm control --reload
-udevadm trigger /dev/sda
+udevadm trigger --settle /dev/sda
 
 while : ; do
     (

test/units/testsuite-17.03.sh

@@ -8,10 +8,10 @@ setup() {
     mkdir -p "${test_rule%/*}"
     cp -f /etc/udev/udev.conf /etc/udev/udev.conf.bckp
     cat >"${test_rule}" <<EOF
-SUBSYSTEM=="net", KERNEL=="lo", OPTIONS="log_level=debug"
-SUBSYSTEM=="net", KERNEL=="lo", PROGRAM=="/bin/sleep 60"
+ACTION=="add", SUBSYSTEM=="mem", KERNEL=="null", OPTIONS="log_level=debug"
+ACTION=="add", SUBSYSTEM=="mem", KERNEL=="null", PROGRAM=="/bin/sleep 60"
 EOF
-    echo "event_timeout=30" >>/etc/udev/udev.conf
+    echo "event_timeout=10" >>/etc/udev/udev.conf
     echo "timeout_signal=SIGABRT" >>/etc/udev/udev.conf
 
     systemctl restart systemd-udevd.service
@@ -28,13 +28,13 @@ teardown() {
 run_test() {
     since="$(date +%T)"
 
-    echo add >/sys/class/net/lo/uevent
+    udevadm trigger -w --action add /dev/null
 
     for _ in {1..20}; do
-        sleep 5
         if coredumpctl --since "$since" --no-legend --no-pager | grep /bin/udevadm ; then
             return 0
         fi
+        sleep .5
     done
 
     return 1

test/units/testsuite-17.04.sh

@@ -15,42 +15,34 @@ ACTION=="change", SUBSYSTEM=="mem", KERNEL=="null", TAG+="changed"
 EOF
 
 udevadm control --reload
-udevadm trigger -c add /dev/null
+udevadm trigger --settle --action add /dev/null
 
-while   test ! -f /run/udev/tags/added/c1:3 ||
-        test -f /run/udev/tags/changed/c1:3 ||
-        ! udevadm info /dev/null | grep -q 'E: TAGS=.*:added:.*' ||
-        ! udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:added:.*' ||
-        udevadm info /dev/null | grep -q 'E: TAGS=.*:changed:.*' ||
-        udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:changed:.*'
-do
-    sleep .5
-done
+test -f /run/udev/tags/added/c1:3
+test ! -f /run/udev/tags/changed/c1:3
+udevadm info /dev/null | grep -q 'E: TAGS=.*:added:.*'
+udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:added:.*'
+udevadm info /dev/null | grep -q 'E: TAGS=.*:changed:.*' && { echo 'unexpected TAGS='; exit 1; }
+udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:changed:.*' && { echo 'unexpected CURRENT_TAGS='; exit 1; }
 
+udevadm trigger --settle --action change /dev/null
+
+test -f /run/udev/tags/added/c1:3
+test -f /run/udev/tags/changed/c1:3
+udevadm info /dev/null | grep -q 'E: TAGS=.*:added:.*'
+udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:added:.*' && { echo 'unexpected CURRENT_TAGS='; exit 1; }
+udevadm info /dev/null | grep -q 'E: TAGS=.*:changed:.*'
+udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:changed:.*'
+
+udevadm trigger --settle --action add /dev/null
+
+test -f /run/udev/tags/added/c1:3
+test -f /run/udev/tags/changed/c1:3
+udevadm info /dev/null | grep -q 'E: TAGS=.*:added:.*'
+udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:added:.*'
+udevadm info /dev/null | grep -q 'E: TAGS=.*:changed:.*'
+udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:changed:.*' && { echo 'unexpected CURRENT_TAGS='; exit 1; }
+
+rm /run/udev/rules.d/50-testsuite.rules
 udevadm control --reload
-udevadm trigger -c change /dev/null
-
-while   test ! -f /run/udev/tags/added/c1:3 ||
-        test ! -f /run/udev/tags/changed/c1:3 ||
-        ! udevadm info /dev/null | grep -q 'E: TAGS=.*:added:.*' ||
-        udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:added:.*' ||
-        ! udevadm info /dev/null | grep -q 'E: TAGS=.*:changed:.*' ||
-        ! udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:changed:.*'
-do
-    sleep .5
-done
-
-udevadm control --reload
-udevadm trigger -c add /dev/null
-
-while   test ! -f /run/udev/tags/added/c1:3 ||
-        test ! -f /run/udev/tags/changed/c1:3 ||
-        ! udevadm info /dev/null | grep -q 'E: TAGS=.*:added:.*' ||
-        ! udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:added:.*' ||
-        ! udevadm info /dev/null | grep -q 'E: TAGS=.*:changed:.*' ||
-        udevadm info /dev/null | grep -q 'E: CURRENT_TAGS=.*:changed:.*'
-do
-    sleep .5
-done
 
 exit 0

test/units/testsuite-17.05.sh

@@ -10,15 +10,13 @@ ACTION=="add", SUBSYSTEM=="mem", KERNEL=="null", IMPORT{program}="/bin/echo -e H
 EOF
 
 udevadm control --reload
-udevadm trigger -c add /dev/null
+udevadm trigger --settle --action add /dev/null
 
-while : ; do
-    test -f /run/udev/data/c1:3 &&
-        udevadm info /dev/null | grep -q 'E: HOGE=aa\\x20\\x20\\x20bb' &&
-        udevadm info /dev/null | grep -q 'E: FOO=\\x20aaa\\x20' &&
-        break
+test -f /run/udev/data/c1:3
+udevadm info /dev/null | grep -q 'E: HOGE=aa\\x20\\x20\\x20bb'
+udevadm info /dev/null | grep -q 'E: FOO=\\x20aaa\\x20'
 
-    sleep .5
-done
+rm /run/udev/rules.d/50-testsuite.rules
+udevadm control --reload
 
 exit 0

test/units/testsuite-17.06.sh

@@ -21,20 +21,15 @@ function check() {
         systemctl restart systemd-udevd.service
         udevadm control --ping
         udevadm settle
-        sleep 1
         check_validity
 
         for ((j=0;j<2;j++)); do
             udevadm trigger -w --action add --subsystem-match=block
-            udevadm settle
-            sleep 1
             check_validity
         done
 
         for ((j=0;j<2;j++)); do
             udevadm trigger -w --action change --subsystem-match=block
-            udevadm settle
-            sleep 1
             check_validity
         done
     done
@@ -70,6 +65,5 @@ rm /run/udev/rules.d/00-debug.rules
 rm /run/udev/rules.d/50-testsuite.rules
 
 udevadm control --reload
-udevadm trigger -w --action add --subsystem-match=block
 
 exit 0

test/units/testsuite-64.sh

@@ -5,11 +5,27 @@ set -eux
 set -o pipefail
 
 # Check if all symlinks under /dev/disk/ are valid
+# shellcheck disable=SC2120
 helper_check_device_symlinks() {
-    local dev link target
+    # Disable verbose logging only for this function (and reset the signal handler
+    # when leaving the function)
+    set +x; trap "trap - RETURN; set -x" RETURN
+
+    local dev link path paths target
+
+    [[ $# -gt 0 ]] && paths=("$@") || paths=("/dev/disk")
+
+    # Check if all given paths are valid
+    for path in "${paths[@]}"; do
+        if ! test -e "$path"; then
+            echo >&2 "Path '$path' doesn't exist"
+            return 1
+        fi
+    done
 
     while read -r link; do
         target="$(readlink -f "$link")"
+        echo "$link -> $target"
         # Both checks should do virtually the same thing, but check both to be
         # on the safe side
         if [[ ! -e "$link" || ! -e "$target" ]]; then
@@ -23,7 +39,7 @@ helper_check_device_symlinks() {
             echo >&2 "ERROR: symlink '$link' points to '$target' but '$dev' was expected"
             return 1
         fi
-    done < <(find /dev/disk -type l)
+    done < <(find "${paths[@]}" -type l)
 }
 
 testcase_megasas2_basic() {
@@ -177,6 +193,92 @@ EOF
     rm -f "$partscript"
 }
 
+testcase_lvm_basic() {
+    local i part
+    local vgroup="MyTestGroup$RANDOM"
+    local devices=(
+        /dev/disk/by-id/ata-foobar_deadbeeflvm{0..3}
+    )
+
+    # Make sure all the necessary soon-to-be-LVM devices exist
+    ls -l "${devices[@]}"
+
+    # Add all test devices into a volume group, create two logical volumes,
+    # and check if necessary symlinks exist (and are valid)
+    lvm pvcreate -y "${devices[@]}"
+    lvm pvs
+    lvm vgcreate "$vgroup" -y "${devices[@]}"
+    lvm vgs
+    lvm vgchange -ay "$vgroup"
+    lvm lvcreate -y -L 4M "$vgroup" -n mypart1
+    lvm lvcreate -y -L 8M "$vgroup" -n mypart2
+    lvm lvs
+    udevadm settle
+    test -e "/dev/$vgroup/mypart1"
+    test -e "/dev/$vgroup/mypart2"
+    mkfs.ext4 -L mylvpart1 "/dev/$vgroup/mypart1"
+    udevadm settle
+    test -e "/dev/disk/by-label/mylvpart1"
+    helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
+
+    # Disable the VG and check symlinks...
+    lvm vgchange -an "$vgroup"
+    udevadm settle
+    test ! -e "/dev/$vgroup"
+    test ! -e "/dev/disk/by-label/mylvpart1"
+    helper_check_device_symlinks "/dev/disk"
+
+    # reenable the VG and check the symlinks again if all LVs are properly activated
+    lvm vgchange -ay "$vgroup"
+    udevadm settle
+    test -e "/dev/$vgroup/mypart1"
+    test -e "/dev/$vgroup/mypart2"
+    test -e "/dev/disk/by-label/mylvpart1"
+    helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
+
+    # Same as above, but now with more "stress"
+    for i in {1..100}; do
+        lvm vgchange -an "$vgroup"
+        lvm vgchange -ay "$vgroup"
+
+        if ((i % 10 == 0)); then
+            udevadm settle
+            test -e "/dev/$vgroup/mypart1"
+            test -e "/dev/$vgroup/mypart2"
+            test -e "/dev/disk/by-label/mylvpart1"
+            helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
+        fi
+    done
+
+    # Remove the first LV
+    lvm lvremove -y "$vgroup/mypart1"
+    udevadm settle
+    test ! -e "/dev/$vgroup/mypart1"
+    test -e "/dev/$vgroup/mypart2"
+    helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
+
+    # Create & remove LVs in a loop, i.e. with more "stress"
+    for i in {1..50}; do
+        # 1) Create 16 logical volumes
+        for part in {0..15}; do
+            lvm lvcreate -y -L 4M "$vgroup" -n "looppart$part"
+        done
+
+        # 2) Immediately remove them
+        lvm lvremove -y "$vgroup"/looppart{0..15}
+
+        # 3) On every 10th iteration settle udev and check if all partitions are
+        #    indeed gone, and if all symlinks are still valid
+        if ((i % 10 == 0)); then
+            udevadm settle
+            for part in {0..15}; do
+                test ! -e "/dev/$vgroup/looppart$part"
+            done
+            helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
+        fi
+    done
+}
+
 : >/failed
 
 udevadm settle