From: Siddhesh Poyarekar <siddhesh@sourceware.org>
To: Adhemerval Zanella <adhemerval.zanella@linaro.org>,
libc-alpha@sourceware.org
Subject: Re: [PATCH v2 03/19] elf: Ignore GLIBC_TUNABLES for setuid/setgid binaries
Date: Wed, 18 Oct 2023 09:04:21 -0400 [thread overview]
Message-ID: <07824415-db34-31a2-e512-5a846e12c743@sourceware.org> (raw)
In-Reply-To: <20231017130526.2216827-4-adhemerval.zanella@linaro.org>
On 2023-10-17 09:05, Adhemerval Zanella wrote:
> The tunable privilege levels were a retrofit to try and keep the malloc
> tunable environment variables' behavior unchanged across security
> boundaries. However, CVE-2023-4911 shows how tricky can be
> tunable parsing in a security-sensitive environment.
>
> Not only parsing, but the malloc tunable essentially changes some
> semantics on setuid/setgid processes. Although it is not a direct
> security issue, allowing users to change setuid/setgid semantics is not
> a good security practice, and requires extra code and analysis to check
> if each tunable is safe to use on all security boundaries.
>
> It also means that security opt-in features, like aarch64 MTE, would
> need to be explicit enabled by an administrator with a wrapper script
> or with a possible future system-wide tunable setting.
>
> Co-authored-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
I'll leave this for someone else to review since I wrote some parts of this.
Thanks,
Sid
> ---
> elf/Makefile | 5 +-
> elf/dl-tunable-types.h | 10 --
> elf/dl-tunables.c | 127 ++++-----------
> elf/dl-tunables.list | 9 --
> elf/tst-env-setuid-tunables.c | 29 +++-
> elf/tst-tunables.c | 244 +++++++++++++++++++++++++++++
> manual/README.tunables | 9 --
> scripts/gen-tunables.awk | 18 +--
> sysdeps/x86_64/64/dl-tunables.list | 1 -
> 9 files changed, 299 insertions(+), 153 deletions(-)
> create mode 100644 elf/tst-tunables.c
>
> diff --git a/elf/Makefile b/elf/Makefile
> index 9176cbf1e3..c824f7dab7 100644
> --- a/elf/Makefile
> +++ b/elf/Makefile
> @@ -263,7 +263,6 @@ tests-static-normal := \
> tst-dl-iter-static \
> tst-dst-static \
> tst-env-setuid \
> - tst-env-setuid-tunables \
> tst-getauxval-static \
> tst-linkall-static \
> tst-single_threaded-pthread-static \
> @@ -276,10 +275,12 @@ tests-static-normal := \
> tests-static-internal := \
> tst-dl-printf-static \
> tst-dl_find_object-static \
> + tst-env-setuid-tunables \
> tst-ptrguard1-static \
> tst-stackguard1-static \
> tst-tls1-static \
> tst-tls1-static-non-pie \
> + tst-tunables \
> # tests-static-internal
>
> CRT-tst-tls1-static-non-pie := $(csu-objpfx)crt1.o
> @@ -2696,6 +2697,8 @@ $(objpfx)tst-glibc-hwcaps-mask.out: \
> # tst-glibc-hwcaps-cache.
> $(objpfx)tst-glibc-hwcaps-cache.out: $(objpfx)tst-glibc-hwcaps
>
> +tst-tunables-ARGS = -- $(host-test-program-cmd)
> +
> $(objpfx)list-tunables.out: tst-rtld-list-tunables.sh $(objpfx)ld.so
> $(SHELL) $< $(objpfx)ld.so '$(test-wrapper-env)' \
> '$(run_program_env)' > $(objpfx)/tst-rtld-list-tunables.out
> diff --git a/elf/dl-tunable-types.h b/elf/dl-tunable-types.h
> index c88332657e..62d6d9e629 100644
> --- a/elf/dl-tunable-types.h
> +++ b/elf/dl-tunable-types.h
> @@ -64,16 +64,6 @@ struct _tunable
> tunable_val_t val; /* The value. */
> bool initialized; /* Flag to indicate that the tunable is
> initialized. */
> - tunable_seclevel_t security_level; /* Specify the security level for the
> - tunable with respect to AT_SECURE
> - programs. See description of
> - tunable_seclevel_t to see a
> - description of the values.
> -
> - Note that even if the tunable is
> - read, it may not get used by the
> - target module if the value is
> - considered unsafe. */
> /* Compatibility elements. */
> const char env_alias[TUNABLE_ALIAS_MAX]; /* The compatibility environment
> variable name. */
> diff --git a/elf/dl-tunables.c b/elf/dl-tunables.c
> index 24252af22c..a83bd2b8bc 100644
> --- a/elf/dl-tunables.c
> +++ b/elf/dl-tunables.c
> @@ -154,50 +154,51 @@ __tunable_set_val (tunable_id_t id, tunable_val_t *valp, tunable_num_t *minp,
> do_tunable_update_val (cur, valp, minp, maxp);
> }
>
> -/* Parse the tunable string TUNESTR and adjust it to drop any tunables that may
> - be unsafe for AT_SECURE processes so that it can be used as the new
> - environment variable value for GLIBC_TUNABLES. VALSTRING is the original
> - environment variable string which we use to make NULL terminated values so
> - that we don't have to allocate memory again for it. */
> +/* Parse the tunable string VALSTRING. VALSTRING is a duplicated values,
> + where delimiters ':' are replaced with '\0', so string tunables are null
> + terminated. */
> static void
> -parse_tunables (char *tunestr, char *valstring)
> +parse_tunables (char *valstring)
> {
> - if (tunestr == NULL || *tunestr == '\0')
> + if (valstring == NULL || *valstring == '\0')
> return;
>
> - char *p = tunestr;
> - size_t off = 0;
> + char *p = valstring;
> + bool done = false;
>
> - while (true)
> + while (!done)
> {
> char *name = p;
> - size_t len = 0;
>
> /* First, find where the name ends. */
> - while (p[len] != '=' && p[len] != ':' && p[len] != '\0')
> - len++;
> + while (*p != '=' && *p != ':' && *p != '\0')
> + p++;
>
> /* If we reach the end of the string before getting a valid name-value
> pair, bail out. */
> - if (p[len] == '\0')
> + if (*p == '\0')
> break;
>
> /* We did not find a valid name-value pair before encountering the
> colon. */
> - if (p[len]== ':')
> + if (*p == ':')
> {
> - p += len + 1;
> + p++;
> continue;
> }
>
> - p += len + 1;
> + /* Skip the ':' or '='. */
> + p++;
>
> - /* Take the value from the valstring since we need to NULL terminate it. */
> - char *value = &valstring[p - tunestr];
> - len = 0;
> + const char *value = p;
>
> - while (p[len] != ':' && p[len] != '\0')
> - len++;
> + while (*p != ':' && *p != '\0')
> + p++;
> +
> + if (*p == '\0')
> + done = true;
> + else
> + *p++ = '\0';
>
> /* Add the tunable if it exists. */
> for (size_t i = 0; i < sizeof (tunable_list) / sizeof (tunable_t); i++)
> @@ -206,50 +207,11 @@ parse_tunables (char *tunestr, char *valstring)
>
> if (tunable_is_name (cur->name, name))
> {
> - /* If we are in a secure context (AT_SECURE) then ignore the
> - tunable unless it is explicitly marked as secure. Tunable
> - values take precedence over their envvar aliases. We write
> - the tunables that are not SXID_ERASE back to TUNESTR, thus
> - dropping all SXID_ERASE tunables and any invalid or
> - unrecognized tunables. */
> - if (__libc_enable_secure)
> - {
> - if (cur->security_level != TUNABLE_SECLEVEL_SXID_ERASE)
> - {
> - if (off > 0)
> - tunestr[off++] = ':';
> -
> - const char *n = cur->name;
> -
> - while (*n != '\0')
> - tunestr[off++] = *n++;
> -
> - tunestr[off++] = '=';
> -
> - for (size_t j = 0; j < len; j++)
> - tunestr[off++] = value[j];
> - }
> -
> - if (cur->security_level != TUNABLE_SECLEVEL_NONE)
> - break;
> - }
> -
> - value[len] = '\0';
> tunable_initialize (cur, value);
> break;
> }
> }
> -
> - /* We reached the end while processing the tunable string. */
> - if (p[len] == '\0')
> - break;
> -
> - p += len + 1;
> }
> -
> - /* Terminate tunestr before we leave. */
> - if (__libc_enable_secure)
> - tunestr[off] = '\0';
> }
>
> /* Initialize the tunables list from the environment. For now we only use the
> @@ -263,16 +225,16 @@ __tunables_init (char **envp)
> size_t len = 0;
> char **prev_envp = envp;
>
> + /* Ignore tunables for AT_SECURE programs. */
> + if (__libc_enable_secure)
> + return;
> +
> while ((envp = get_next_env (envp, &envname, &len, &envval,
> &prev_envp)) != NULL)
> {
> if (tunable_is_name ("GLIBC_TUNABLES", envname))
> {
> - char *new_env = tunables_strdup (envname);
> - if (new_env != NULL)
> - parse_tunables (new_env + len + 1, envval);
> - /* Put in the updated envval. */
> - *prev_envp = new_env;
> + parse_tunables (tunables_strdup (envval));
> continue;
> }
>
> @@ -290,39 +252,6 @@ __tunables_init (char **envp)
> /* We have a match. Initialize and move on to the next line. */
> if (tunable_is_name (name, envname))
> {
> - /* For AT_SECURE binaries, we need to check the security settings of
> - the tunable and decide whether we read the value and also whether
> - we erase the value so that child processes don't inherit them in
> - the environment. */
> - if (__libc_enable_secure)
> - {
> - if (cur->security_level == TUNABLE_SECLEVEL_SXID_ERASE)
> - {
> - /* Erase the environment variable. */
> - char **ep = prev_envp;
> -
> - while (*ep != NULL)
> - {
> - if (tunable_is_name (name, *ep))
> - {
> - char **dp = ep;
> -
> - do
> - dp[0] = dp[1];
> - while (*dp++);
> - }
> - else
> - ++ep;
> - }
> - /* Reset the iterator so that we read the environment again
> - from the point we erased. */
> - envp = prev_envp;
> - }
> -
> - if (cur->security_level != TUNABLE_SECLEVEL_NONE)
> - continue;
> - }
> -
> tunable_initialize (cur, envval);
> break;
> }
> diff --git a/elf/dl-tunables.list b/elf/dl-tunables.list
> index 695ba7192e..471895af7b 100644
> --- a/elf/dl-tunables.list
> +++ b/elf/dl-tunables.list
> @@ -21,14 +21,6 @@
> # minval: Optional minimum acceptable value
> # maxval: Optional maximum acceptable value
> # env_alias: An alias environment variable
> -# security_level: Specify security level of the tunable for AT_SECURE binaries.
> -# Valid values are:
> -#
> -# SXID_ERASE: (default) Do not read and do not pass on to
> -# child processes.
> -# SXID_IGNORE: Do not read, but retain for non-AT_SECURE
> -# subprocesses.
> -# NONE: Read all the time.
>
> glibc {
> malloc {
> @@ -158,7 +150,6 @@ glibc {
> type: INT_32
> minval: 0
> maxval: 255
> - security_level: SXID_IGNORE
> }
> }
>
> diff --git a/elf/tst-env-setuid-tunables.c b/elf/tst-env-setuid-tunables.c
> index 2603007b7b..ca02dbba58 100644
> --- a/elf/tst-env-setuid-tunables.c
> +++ b/elf/tst-env-setuid-tunables.c
> @@ -15,14 +15,10 @@
> License along with the GNU C Library; if not, see
> <https://www.gnu.org/licenses/>. */
>
> -/* Verify that tunables correctly filter out unsafe tunables like
> - glibc.malloc.check and glibc.malloc.mmap_threshold but also retain
> - glibc.malloc.mmap_threshold in an unprivileged child. */
> -
> -#define _LIBC 1
> -#include "config.h"
> -#undef _LIBC
> +/* Verify that GLIBC_TUNABLES is kept unchanged but no tunable is actually
> + enabled for AT_SECURE processes. */
>
> +#include <dl-tunables.h>
> #include <errno.h>
> #include <fcntl.h>
> #include <stdlib.h>
> @@ -40,7 +36,7 @@
> #include <support/test-driver.h>
> #include <support/capture_subprocess.h>
>
> -const char *teststrings[] =
> +static const char *teststrings[] =
> {
> "glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096",
> "glibc.malloc.check=2:glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096",
> @@ -74,6 +70,23 @@ test_child (int off)
> ret = 0;
> fflush (stdout);
>
> + /* Also check if the set tunables are effectively unchanged. */
> + int32_t check = TUNABLE_GET_FULL (glibc, malloc, check, int32_t, NULL);
> + size_t mmap_threshold = TUNABLE_GET_FULL (glibc, malloc, mmap_threshold,
> + size_t, NULL);
> + int32_t perturb = TUNABLE_GET_FULL (glibc, malloc, perturb, int32_t, NULL);
> +
> + printf (" [%d] glibc.malloc.check=%d\n", off, check);
> + fflush (stdout);
> + printf (" [%d] glibc.malloc.mmap_threshold=%zu\n", off, mmap_threshold);
> + fflush (stdout);
> + printf (" [%d] glibc.malloc.perturb=%d\n", off, perturb);
> + fflush (stdout);
> +
> + ret |= check != 0;
> + ret |= mmap_threshold != 0;
> + ret |= perturb != 0;
> +
> return ret;
> }
>
> diff --git a/elf/tst-tunables.c b/elf/tst-tunables.c
> new file mode 100644
> index 0000000000..57cf532fc4
> --- /dev/null
> +++ b/elf/tst-tunables.c
> @@ -0,0 +1,244 @@
> +/* Check GLIBC_TUNABLES parsing.
> + Copyright (C) 2023 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <array_length.h>
> +#include <dl-tunables.h>
> +#include <getopt.h>
> +#include <intprops.h>
> +#include <stdint.h>
> +#include <stdlib.h>
> +#include <support/capture_subprocess.h>
> +#include <support/check.h>
> +
> +static int restart;
> +#define CMDLINE_OPTIONS \
> + { "restart", no_argument, &restart, 1 },
> +
> +static const struct test_t
> +{
> + const char *env;
> + int32_t expected_malloc_check;
> + size_t expected_mmap_threshold;
> + int32_t expected_perturb;
> +} tests[] =
> +{
> + /* Expected tunable format. */
> + {
> + "glibc.malloc.check=2",
> + 2,
> + 0,
> + 0,
> + },
> + {
> + "glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096",
> + 2,
> + 4096,
> + 0,
> + },
> + /* Empty tunable are ignored. */
> + {
> + "glibc.malloc.check=2::glibc.malloc.mmap_threshold=4096",
> + 2,
> + 4096,
> + 0,
> + },
> + /* As well empty values. */
> + {
> + "glibc.malloc.check=:glibc.malloc.mmap_threshold=4096",
> + 0,
> + 4096,
> + 0,
> + },
> + /* Tunable are processed from left to right, so last one is the one set. */
> + {
> + "glibc.malloc.check=1:glibc.malloc.check=2",
> + 2,
> + 0,
> + 0,
> + },
> + {
> + "glibc.malloc.check=2:glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096",
> + 2,
> + 4096,
> + 0,
> + },
> + {
> + "glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096:glibc.malloc.check=2",
> + 2,
> + 4096,
> + 0,
> + },
> + /* 0x800 is larger than tunable maxval (0xff), so the tunable is unchanged. */
> + {
> + "glibc.malloc.perturb=0x800",
> + 0,
> + 0,
> + 0,
> + },
> + {
> + "glibc.malloc.perturb=0x55",
> + 0,
> + 0,
> + 0x55,
> + },
> + /* Out of range values are just ignored. */
> + {
> + "glibc.malloc.perturb=0x800:glibc.malloc.mmap_threshold=4096",
> + 0,
> + 4096,
> + 0,
> + },
> + /* Invalid keys are ignored. */
> + {
> + ":glibc.malloc.garbage=2:glibc.malloc.check=1",
> + 1,
> + 0,
> + 0,
> + },
> + {
> + "glibc.malloc.perturb=0x800:not_valid.malloc.check=2:glibc.malloc.mmap_threshold=4096",
> + 0,
> + 4096,
> + 0,
> + },
> + {
> + "glibc.not_valid.check=2:glibc.malloc.mmap_threshold=4096",
> + 0,
> + 4096,
> + 0,
> + },
> + {
> + "not_valid.malloc.check=2:glibc.malloc.mmap_threshold=4096",
> + 0,
> + 4096,
> + 0,
> + },
> + /* Invalid subkeys are ignored. */
> + {
> + "glibc.malloc.garbage=2:glibc.maoc.mmap_threshold=4096:glibc.malloc.check=2",
> + 2,
> + 0,
> + 0,
> + },
> + {
> + "glibc.malloc.check=4:glibc.malloc.garbage=2:glibc.maoc.mmap_threshold=4096",
> + 0,
> + 0,
> + 0,
> + },
> + {
> + "not_valid.malloc.check=2",
> + 0,
> + 0,
> + 0,
> + },
> + {
> + "glibc.not_valid.check=2",
> + 0,
> + 0,
> + 0,
> + },
> + /* An ill-formatted tunable in the for key=key=value will considere the
> + value as 'key=value' (which can not be parsed as an integer). */
> + {
> + "glibc.malloc.mmap_threshold=glibc.malloc.mmap_threshold=4096",
> + 0,
> + 0,
> + 0,
> + },
> + /* The ill-formatted tunable is also skipped. */
> + {
> + "glibc.malloc.mmap_threshold=glibc.malloc.mmap_threshold=4096:glibc.malloc.check=2",
> + 2,
> + 0,
> + 0,
> + },
> + /* For an integer tunable, parse will stop on non number character. */
> + {
> + "glibc.malloc.check=2=2",
> + 2,
> + 0,
> + 0,
> + },
> + {
> + "glibc.malloc.check=2=2:glibc.malloc.mmap_threshold=4096",
> + 2,
> + 4096,
> + 0,
> + }
> +};
> +
> +static int
> +handle_restart (int i)
> +{
> + TEST_COMPARE (tests[i].expected_malloc_check,
> + TUNABLE_GET_FULL (glibc, malloc, check, int32_t, NULL));
> + TEST_COMPARE (tests[i].expected_mmap_threshold,
> + TUNABLE_GET_FULL (glibc, malloc, mmap_threshold, size_t, NULL));
> + TEST_COMPARE (tests[i].expected_perturb,
> + TUNABLE_GET_FULL (glibc, malloc, perturb, int32_t, NULL));
> + return 0;
> +}
> +
> +static int
> +do_test (int argc, char *argv[])
> +{
> + /* We must have either:
> + - One our fource parameters left if called initially:
> + + path to ld.so optional
> + + "--library-path" optional
> + + the library path optional
> + + the application name
> + + the test to check */
> +
> + TEST_VERIFY_EXIT (argc == 2 || argc == 5);
> +
> + if (restart)
> + return handle_restart (atoi (argv[1]));
> +
> + char nteststr[INT_BUFSIZE_BOUND (int)];
> +
> + char *spargv[10];
> + {
> + int i = 0;
> + for (; i < argc - 1; i++)
> + spargv[i] = argv[i + 1];
> + spargv[i++] = (char *) "--direct";
> + spargv[i++] = (char *) "--restart";
> + spargv[i++] = nteststr;
> + spargv[i] = NULL;
> + }
> +
> + for (int i = 0; i < array_length (tests); i++)
> + {
> + snprintf (nteststr, sizeof nteststr, "%d", i);
> +
> + printf ("[%d] Spawned test for %s\n", i, tests[i].env);
> + setenv ("GLIBC_TUNABLES", tests[i].env, 1);
> + struct support_capture_subprocess result
> + = support_capture_subprogram (spargv[0], spargv);
> + support_capture_subprocess_check (&result, "tst-tunables", 0,
> + sc_allow_stderr);
> + support_capture_subprocess_free (&result);
> + }
> +
> + return 0;
> +}
> +
> +#define TEST_FUNCTION_ARGV do_test
> +#include <support/test-driver.c>
> diff --git a/manual/README.tunables b/manual/README.tunables
> index 605ddd78cd..72ae00dc02 100644
> --- a/manual/README.tunables
> +++ b/manual/README.tunables
> @@ -59,15 +59,6 @@ The list of allowed attributes are:
>
> - env_alias: An alias environment variable
>
> -- security_level: Specify security level of the tunable for AT_SECURE
> - binaries. Valid values are:
> -
> - SXID_ERASE: (default) Do not read and do not pass on to
> - child processes.
> - SXID_IGNORE: Do not read, but retain for non-AT_SECURE
> - child processes.
> - NONE: Read all the time.
> -
> 2. Use TUNABLE_GET/TUNABLE_SET/TUNABLE_SET_WITH_BOUNDS to get and set tunables.
>
> 3. OPTIONAL: If tunables in a namespace are being used multiple times within a
> diff --git a/scripts/gen-tunables.awk b/scripts/gen-tunables.awk
> index d6de100df0..1e9d6b534e 100644
> --- a/scripts/gen-tunables.awk
> +++ b/scripts/gen-tunables.awk
> @@ -61,9 +61,6 @@ $1 == "}" {
> if (!env_alias[top_ns,ns,tunable]) {
> env_alias[top_ns,ns,tunable] = "{0}"
> }
> - if (!security_level[top_ns,ns,tunable]) {
> - security_level[top_ns,ns,tunable] = "SXID_ERASE"
> - }
> len = length(top_ns"."ns"."tunable)
> if (len > max_name_len)
> max_name_len = len
> @@ -118,17 +115,6 @@ $1 == "}" {
> if (len > max_alias_len)
> max_alias_len = len
> }
> - else if (attr == "security_level") {
> - if (val == "SXID_ERASE" || val == "SXID_IGNORE" || val == "NONE") {
> - security_level[top_ns,ns,tunable] = val
> - }
> - else {
> - printf("Line %d: Invalid value (%s) for security_level: %s, ", NR, val,
> - $0)
> - print("Allowed values are 'SXID_ERASE', 'SXID_IGNORE', or 'NONE'")
> - exit 1
> - }
> - }
> else if (attr == "default") {
> if (types[top_ns,ns,tunable] == "STRING") {
> default_val[top_ns,ns,tunable] = sprintf(".strval = \"%s\"", val);
> @@ -177,9 +163,9 @@ END {
> n = indices[2];
> m = indices[3];
> printf (" {TUNABLE_NAME_S(%s, %s, %s)", t, n, m)
> - printf (", {TUNABLE_TYPE_%s, %s, %s}, {%s}, false, TUNABLE_SECLEVEL_%s, %s},\n",
> + printf (", {TUNABLE_TYPE_%s, %s, %s}, {%s}, false, %s},\n",
> types[t,n,m], minvals[t,n,m], maxvals[t,n,m],
> - default_val[t,n,m], security_level[t,n,m], env_alias[t,n,m]);
> + default_val[t,n,m], env_alias[t,n,m]);
> }
> print "};"
> print "#endif"
> diff --git a/sysdeps/x86_64/64/dl-tunables.list b/sysdeps/x86_64/64/dl-tunables.list
> index 0aab52e662..54a216a461 100644
> --- a/sysdeps/x86_64/64/dl-tunables.list
> +++ b/sysdeps/x86_64/64/dl-tunables.list
> @@ -23,7 +23,6 @@ glibc {
> minval: 0
> maxval: 1
> env_alias: LD_PREFER_MAP_32BIT_EXEC
> - security_level: SXID_IGNORE
> }
> }
> }
next prev parent reply other threads:[~2023-10-18 13:04 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-17 13:05 [PATCH v2 00/19] Improve loader environment variable handling Adhemerval Zanella
2023-10-17 13:05 ` [PATCH v2 01/19] elf: Remove /etc/suid-debug support Adhemerval Zanella
2023-10-18 12:31 ` Siddhesh Poyarekar
2023-10-18 18:27 ` Adhemerval Zanella Netto
2023-10-17 13:05 ` [PATCH v2 02/19] elf: Add GLIBC_TUNABLES to unsecvars Adhemerval Zanella
2023-10-18 12:52 ` Siddhesh Poyarekar
2023-10-17 13:05 ` [PATCH v2 03/19] elf: Ignore GLIBC_TUNABLES for setuid/setgid binaries Adhemerval Zanella
2023-10-18 13:04 ` Siddhesh Poyarekar [this message]
2023-10-27 10:38 ` Siddhesh Poyarekar
2023-10-28 2:14 ` DJ Delorie
2023-10-30 16:51 ` Adhemerval Zanella Netto
2023-10-17 13:05 ` [PATCH v2 04/19] elf: Add all malloc tunable to unsecvars Adhemerval Zanella
2023-10-18 13:04 ` Siddhesh Poyarekar
2023-10-27 10:38 ` Siddhesh Poyarekar
2023-10-28 3:45 ` DJ Delorie
2023-10-17 13:05 ` [PATCH v2 05/19] elf: Do not process invalid tunable format Adhemerval Zanella
2023-10-18 13:42 ` Siddhesh Poyarekar
2023-10-17 13:05 ` [PATCH v2 06/19] elf: Do not parse ill-formatted strings Adhemerval Zanella
2023-10-27 10:25 ` Siddhesh Poyarekar
2023-10-27 12:51 ` Adhemerval Zanella Netto
2023-10-17 13:05 ` [PATCH v2 07/19] elf: Fix _dl_debug_vdprintf to work before self-relocation Adhemerval Zanella
2023-10-27 10:27 ` Siddhesh Poyarekar
2023-10-17 13:05 ` [PATCH v2 08/19] elf: Emit warning if tunable is ill-formatted Adhemerval Zanella
2023-10-27 10:28 ` Siddhesh Poyarekar
2023-10-27 12:51 ` Adhemerval Zanella Netto
2023-10-17 13:05 ` [PATCH v2 09/19] x86: Use dl-symbol-redir-ifunc.h on cpu-tunables Adhemerval Zanella
2023-10-27 10:32 ` Siddhesh Poyarekar
2023-10-17 13:05 ` [PATCH v2 10/19] s390: " Adhemerval Zanella
2023-10-27 10:34 ` Siddhesh Poyarekar
2023-10-17 13:05 ` [PATCH v2 11/19] elf: Do not duplicate the GLIBC_TUNABLES string Adhemerval Zanella
2023-10-27 11:54 ` Siddhesh Poyarekar
2023-10-30 18:24 ` Adhemerval Zanella Netto
2023-10-17 13:05 ` [PATCH v2 12/19] elf: Ignore LD_PROFILE for setuid binaries Adhemerval Zanella
2023-10-27 14:25 ` Siddhesh Poyarekar
2023-12-12 10:11 ` Florian Weimer
2023-10-17 13:05 ` [PATCH v2 13/19] elf: Remove LD_PROFILE for static binaries Adhemerval Zanella
2023-10-17 13:05 ` [PATCH v2 14/19] elf: Ignore loader debug env vars for setuid Adhemerval Zanella
2023-10-17 13:05 ` [PATCH v2 15/19] elf: Remove any_debug from dl_main_state Adhemerval Zanella
2023-10-27 14:26 ` Siddhesh Poyarekar
2023-10-30 19:03 ` Adhemerval Zanella Netto
2023-10-17 13:05 ` [PATCH v2 16/19] elf: Ignore LD_LIBRARY_PATH and debug env var for setuid for static Adhemerval Zanella
2023-10-17 13:05 ` [PATCH v2 17/19] elf: Add comments on how LD_AUDIT and LD_PRELOAD handle __libc_enable_secure Adhemerval Zanella
2023-10-27 14:31 ` Siddhesh Poyarekar
2023-10-17 13:05 ` [PATCH v2 18/19] elf: Ignore LD_BIND_NOW and LD_BIND_NOT for setuid binaries Adhemerval Zanella
2023-10-17 13:05 ` [PATCH v2 19/19] elf: Refactor process_envvars Adhemerval Zanella
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