diff options
author | takeshi_hoshina <takeshi_hoshina@mail.toyota.co.jp> | 2020-11-02 11:07:33 +0900 |
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committer | takeshi_hoshina <takeshi_hoshina@mail.toyota.co.jp> | 2020-11-02 11:07:33 +0900 |
commit | 1c7d6584a7811b7785ae5c1e378f14b5ba0971cf (patch) | |
tree | cd70a267a5ef105ba32f200aa088e281fbd85747 /external/poky/meta/recipes-core/systemd/systemd/0024-journald-do-not-store-the-iovec-entry-for-process-co.patch | |
parent | 4204309872da5cb401cbb2729d9e2d4869a87f42 (diff) |
basesystem-jjsandbox/ToshikazuOhiwa/master-jj
recipes
Diffstat (limited to 'external/poky/meta/recipes-core/systemd/systemd/0024-journald-do-not-store-the-iovec-entry-for-process-co.patch')
-rw-r--r-- | external/poky/meta/recipes-core/systemd/systemd/0024-journald-do-not-store-the-iovec-entry-for-process-co.patch | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/external/poky/meta/recipes-core/systemd/systemd/0024-journald-do-not-store-the-iovec-entry-for-process-co.patch b/external/poky/meta/recipes-core/systemd/systemd/0024-journald-do-not-store-the-iovec-entry-for-process-co.patch deleted file mode 100644 index c2f78be3..00000000 --- a/external/poky/meta/recipes-core/systemd/systemd/0024-journald-do-not-store-the-iovec-entry-for-process-co.patch +++ /dev/null @@ -1,208 +0,0 @@ -From 9cb07e7d82c7c4f28bbaa1478e1387e8ea3d03dd Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl> -Date: Wed, 5 Dec 2018 18:38:39 +0100 -Subject: [PATCH] journald: do not store the iovec entry for process - commandline on stack - -This fixes a crash where we would read the commandline, whose length is under -control of the sending program, and then crash when trying to create a stack -allocation for it. - -CVE-2018-16864 -https://bugzilla.redhat.com/show_bug.cgi?id=1653855 - -The message actually doesn't get written to disk, because -journal_file_append_entry() returns -E2BIG. - -Patch backported from systemd master at -084eeb865ca63887098e0945fb4e93c852b91b0f. - -CVE: CVE-2018-16864 -Upstream-Status: Backport -Signed-off-by: Marcus Cooper <marcusc@axis.com> ---- - src/basic/io-util.c | 10 ++++++++++ - src/basic/io-util.h | 2 ++ - src/coredump/coredump.c | 31 +++++++++++-------------------- - src/journal/journald-server.c | 25 +++++++++++++++---------- - 4 files changed, 38 insertions(+), 30 deletions(-) - -diff --git a/src/basic/io-util.c b/src/basic/io-util.c -index 1f64cc933b..575398fbe6 100644 ---- a/src/basic/io-util.c -+++ b/src/basic/io-util.c -@@ -8,6 +8,7 @@ - #include <unistd.h> - - #include "io-util.h" -+#include "string-util.h" - #include "time-util.h" - - int flush_fd(int fd) { -@@ -252,3 +253,12 @@ ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length) { - - return q - (const uint8_t*) p; - } -+ -+char* set_iovec_string_field(struct iovec *iovec, size_t *n_iovec, const char *field, const char *value) { -+ char *x; -+ -+ x = strappend(field, value); -+ if (x) -+ iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(x); -+ return x; -+} -diff --git a/src/basic/io-util.h b/src/basic/io-util.h -index ed189b5820..792a64ad5e 100644 ---- a/src/basic/io-util.h -+++ b/src/basic/io-util.h -@@ -71,3 +71,5 @@ static inline bool FILE_SIZE_VALID_OR_INFINITY(uint64_t l) { - #define IOVEC_MAKE(base, len) (struct iovec) IOVEC_INIT(base, len) - #define IOVEC_INIT_STRING(string) IOVEC_INIT((char*) string, strlen(string)) - #define IOVEC_MAKE_STRING(string) (struct iovec) IOVEC_INIT_STRING(string) -+ -+char* set_iovec_string_field(struct iovec *iovec, size_t *n_iovec, const char *field, const char *value); -diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c -index 20a1cbdd45..18e4f61d72 100644 ---- a/src/coredump/coredump.c -+++ b/src/coredump/coredump.c -@@ -1053,19 +1053,10 @@ static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd) - return 0; - } - --static char* set_iovec_field(struct iovec *iovec, size_t *n_iovec, const char *field, const char *value) { -- char *x; -- -- x = strappend(field, value); -- if (x) -- iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(x); -- return x; --} -- - static char* set_iovec_field_free(struct iovec *iovec, size_t *n_iovec, const char *field, char *value) { - char *x; - -- x = set_iovec_field(iovec, n_iovec, field, value); -+ x = set_iovec_string_field(iovec, n_iovec, field, value); - free(value); - return x; - } -@@ -1115,36 +1106,36 @@ static int gather_pid_metadata( - disable_coredumps(); - } - -- set_iovec_field(iovec, n_iovec, "COREDUMP_UNIT=", context[CONTEXT_UNIT]); -+ set_iovec_string_field(iovec, n_iovec, "COREDUMP_UNIT=", context[CONTEXT_UNIT]); - } - - if (cg_pid_get_user_unit(pid, &t) >= 0) - set_iovec_field_free(iovec, n_iovec, "COREDUMP_USER_UNIT=", t); - - /* The next few are mandatory */ -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_PID=", context[CONTEXT_PID])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_PID=", context[CONTEXT_PID])) - return log_oom(); - -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_UID=", context[CONTEXT_UID])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_UID=", context[CONTEXT_UID])) - return log_oom(); - -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_GID=", context[CONTEXT_GID])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_GID=", context[CONTEXT_GID])) - return log_oom(); - -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL])) - return log_oom(); - -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT])) - return log_oom(); - -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_HOSTNAME=", context[CONTEXT_HOSTNAME])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_HOSTNAME=", context[CONTEXT_HOSTNAME])) - return log_oom(); - -- if (!set_iovec_field(iovec, n_iovec, "COREDUMP_COMM=", context[CONTEXT_COMM])) -+ if (!set_iovec_string_field(iovec, n_iovec, "COREDUMP_COMM=", context[CONTEXT_COMM])) - return log_oom(); - - if (context[CONTEXT_EXE] && -- !set_iovec_field(iovec, n_iovec, "COREDUMP_EXE=", context[CONTEXT_EXE])) -+ !set_iovec_string_field(iovec, n_iovec, "COREDUMP_EXE=", context[CONTEXT_EXE])) - return log_oom(); - - if (sd_pid_get_session(pid, &t) >= 0) -@@ -1212,7 +1203,7 @@ static int gather_pid_metadata( - iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); - - if (safe_atoi(context[CONTEXT_SIGNAL], &signo) >= 0 && SIGNAL_VALID(signo)) -- set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL_NAME=SIG", signal_to_string(signo)); -+ set_iovec_string_field(iovec, n_iovec, "COREDUMP_SIGNAL_NAME=SIG", signal_to_string(signo)); - - return 0; /* we successfully acquired all metadata */ - } -diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c -index 4f1550ec5b..31be085c6b 100644 ---- a/src/journal/journald-server.c -+++ b/src/journal/journald-server.c -@@ -753,6 +753,7 @@ static void dispatch_message_real( - pid_t object_pid) { - - char source_time[sizeof("_SOURCE_REALTIME_TIMESTAMP=") + DECIMAL_STR_MAX(usec_t)]; -+ _cleanup_free_ char *cmdline1 = NULL, *cmdline2 = NULL; - uid_t journal_uid; - ClientContext *o; - -@@ -769,20 +770,23 @@ static void dispatch_message_real( - IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->uid, uid_t, uid_is_valid, UID_FMT, "_UID"); - IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->gid, gid_t, gid_is_valid, GID_FMT, "_GID"); - -- IOVEC_ADD_STRING_FIELD(iovec, n, c->comm, "_COMM"); -- IOVEC_ADD_STRING_FIELD(iovec, n, c->exe, "_EXE"); -- IOVEC_ADD_STRING_FIELD(iovec, n, c->cmdline, "_CMDLINE"); -- IOVEC_ADD_STRING_FIELD(iovec, n, c->capeff, "_CAP_EFFECTIVE"); -+ IOVEC_ADD_STRING_FIELD(iovec, n, c->comm, "_COMM"); /* At most TASK_COMM_LENGTH (16 bytes) */ -+ IOVEC_ADD_STRING_FIELD(iovec, n, c->exe, "_EXE"); /* A path, so at most PATH_MAX (4096 bytes) */ - -- IOVEC_ADD_SIZED_FIELD(iovec, n, c->label, c->label_size, "_SELINUX_CONTEXT"); -+ if (c->cmdline) -+ /* At most _SC_ARG_MAX (2MB usually), which is too much to put on stack. -+ * Let's use a heap allocation for this one. */ -+ cmdline1 = set_iovec_string_field(iovec, &n, "_CMDLINE=", c->cmdline); - -+ IOVEC_ADD_STRING_FIELD(iovec, n, c->capeff, "_CAP_EFFECTIVE"); /* Read from /proc/.../status */ -+ IOVEC_ADD_SIZED_FIELD(iovec, n, c->label, c->label_size, "_SELINUX_CONTEXT"); - IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->auditid, uint32_t, audit_session_is_valid, "%" PRIu32, "_AUDIT_SESSION"); - IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->loginuid, uid_t, uid_is_valid, UID_FMT, "_AUDIT_LOGINUID"); - -- IOVEC_ADD_STRING_FIELD(iovec, n, c->cgroup, "_SYSTEMD_CGROUP"); -+ IOVEC_ADD_STRING_FIELD(iovec, n, c->cgroup, "_SYSTEMD_CGROUP"); /* A path */ - IOVEC_ADD_STRING_FIELD(iovec, n, c->session, "_SYSTEMD_SESSION"); - IOVEC_ADD_NUMERIC_FIELD(iovec, n, c->owner_uid, uid_t, uid_is_valid, UID_FMT, "_SYSTEMD_OWNER_UID"); -- IOVEC_ADD_STRING_FIELD(iovec, n, c->unit, "_SYSTEMD_UNIT"); -+ IOVEC_ADD_STRING_FIELD(iovec, n, c->unit, "_SYSTEMD_UNIT"); /* Unit names are bounded by UNIT_NAME_MAX */ - IOVEC_ADD_STRING_FIELD(iovec, n, c->user_unit, "_SYSTEMD_USER_UNIT"); - IOVEC_ADD_STRING_FIELD(iovec, n, c->slice, "_SYSTEMD_SLICE"); - IOVEC_ADD_STRING_FIELD(iovec, n, c->user_slice, "_SYSTEMD_USER_SLICE"); -@@ -803,13 +807,14 @@ static void dispatch_message_real( - IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->uid, uid_t, uid_is_valid, UID_FMT, "OBJECT_UID"); - IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->gid, gid_t, gid_is_valid, GID_FMT, "OBJECT_GID"); - -+ /* See above for size limits, only ->cmdline may be large, so use a heap allocation for it. */ - IOVEC_ADD_STRING_FIELD(iovec, n, o->comm, "OBJECT_COMM"); - IOVEC_ADD_STRING_FIELD(iovec, n, o->exe, "OBJECT_EXE"); -- IOVEC_ADD_STRING_FIELD(iovec, n, o->cmdline, "OBJECT_CMDLINE"); -- IOVEC_ADD_STRING_FIELD(iovec, n, o->capeff, "OBJECT_CAP_EFFECTIVE"); -+ if (o->cmdline) -+ cmdline2 = set_iovec_string_field(iovec, &n, "OBJECT_CMDLINE=", o->cmdline); - -+ IOVEC_ADD_STRING_FIELD(iovec, n, o->capeff, "OBJECT_CAP_EFFECTIVE"); - IOVEC_ADD_SIZED_FIELD(iovec, n, o->label, o->label_size, "OBJECT_SELINUX_CONTEXT"); -- - IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->auditid, uint32_t, audit_session_is_valid, "%" PRIu32, "OBJECT_AUDIT_SESSION"); - IOVEC_ADD_NUMERIC_FIELD(iovec, n, o->loginuid, uid_t, uid_is_valid, UID_FMT, "OBJECT_AUDIT_LOGINUID"); - --- -2.11.0 - |