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Sync from SUSE:ALP:Source:Standard:1.0 glibc revision e047c8446074aefab836e019a5f41fc1

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Adrian Schröter 2024-09-05 11:25:44 +02:00
parent e22ea755a4
commit 7e9b8346f7
12 changed files with 1164 additions and 12 deletions
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37
glibc-CVE-2024-33599-nscd-Stack-based-buffer-overflow-in-n.patch Normal file
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@ -0,0 +1,37 @@
From 87801a8fd06db1d654eea3e4f7626ff476a9bdaa Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 25 Apr 2024 15:00:45 +0200
Subject: [PATCH 1/4] CVE-2024-33599: nscd: Stack-based buffer overflow in
netgroup cache (bug 31677)
Using alloca matches what other caches do. The request length is
bounded by MAXKEYLEN.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
---
nscd/netgroupcache.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
index 0c6e46f15c..f227dc7fa2 100644
--- a/nscd/netgroupcache.c
+++ b/nscd/netgroupcache.c
@@ -502,12 +502,13 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
= (struct indataset *) mempool_alloc (db,
sizeof (*dataset) + req->key_len,
1);
- struct indataset dataset_mem;
bool cacheable = true;
if (__glibc_unlikely (dataset == NULL))
{
cacheable = false;
- dataset = &dataset_mem;
+ /* The alloca is safe because nscd_run_worker verfies that
+ key_len is not larger than MAXKEYLEN. */
+ dataset = alloca (sizeof (*dataset) + req->key_len);
}
datahead_init_pos (&dataset->head, sizeof (*dataset) + req->key_len,
--
2.35.3

59
glibc-CVE-2024-33600-nscd-Avoid-null-pointer-crashes-after.patch Normal file
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@ -0,0 +1,59 @@
From b048a482f088e53144d26a61c390bed0210f49f2 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 25 Apr 2024 15:01:07 +0200
Subject: [PATCH 3/4] CVE-2024-33600: nscd: Avoid null pointer crashes after
notfound response (bug 31678)
The addgetnetgrentX call in addinnetgrX may have failed to produce
a result, so the result variable in addinnetgrX can be NULL.
Use db->negtimeout as the fallback value if there is no result data;
the timeout is also overwritten below.
Also avoid sending a second not-found response. (The client
disconnects after receiving the first response, so the data stream did
not go out of sync even without this fix.) It is still beneficial to
add the negative response to the mapping, so that the client can get
it from there in the future, instead of going through the socket.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
---
nscd/netgroupcache.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
index c18fe111f3..e22ffa5884 100644
--- a/nscd/netgroupcache.c
+++ b/nscd/netgroupcache.c
@@ -511,14 +511,15 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
datahead_init_pos (&dataset->head, sizeof (*dataset) + req->key_len,
sizeof (innetgroup_response_header),
- he == NULL ? 0 : dh->nreloads + 1, result->head.ttl);
+ he == NULL ? 0 : dh->nreloads + 1,
+ result == NULL ? db->negtimeout : result->head.ttl);
/* Set the notfound status and timeout based on the result from
getnetgrent. */
- dataset->head.notfound = result->head.notfound;
+ dataset->head.notfound = result == NULL || result->head.notfound;
dataset->head.timeout = timeout;
dataset->resp.version = NSCD_VERSION;
- dataset->resp.found = result->resp.found;
+ dataset->resp.found = result != NULL && result->resp.found;
/* Until we find a matching entry the result is 0. */
dataset->resp.result = 0;
@@ -566,7 +567,9 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
goto out;
}
- if (he == NULL)
+ /* addgetnetgrentX may have already sent a notfound response. Do
+ not send another one. */
+ if (he == NULL && dataset->resp.found)
{
/* We write the dataset before inserting it to the database
since while inserting this thread might block and so would
--
2.35.3

58
glibc-CVE-2024-33600-nscd-Do-not-send-missing-not-found-re.patch Normal file
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@ -0,0 +1,58 @@
From 7835b00dbce53c3c87bbbb1754a95fb5e58187aa Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 25 Apr 2024 15:01:07 +0200
Subject: [PATCH 2/4] CVE-2024-33600: nscd: Do not send missing not-found
response in addgetnetgrentX (bug 31678)
If we failed to add a not-found response to the cache, the dataset
point can be null, resulting in a null pointer dereference.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
---
nscd/netgroupcache.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
index f227dc7fa2..c18fe111f3 100644
--- a/nscd/netgroupcache.c
+++ b/nscd/netgroupcache.c
@@ -147,7 +147,7 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
/* No such service. */
cacheable = do_notfound (db, fd, req, key, &dataset, &total, &timeout,
&key_copy);
- goto writeout;
+ goto maybe_cache_add;
}
memset (&data, '\0', sizeof (data));
@@ -348,7 +348,7 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
{
cacheable = do_notfound (db, fd, req, key, &dataset, &total, &timeout,
&key_copy);
- goto writeout;
+ goto maybe_cache_add;
}
total = buffilled;
@@ -410,14 +410,12 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
}
if (he == NULL && fd != -1)
- {
- /* We write the dataset before inserting it to the database
- since while inserting this thread might block and so would
- unnecessarily let the receiver wait. */
- writeout:
+ /* We write the dataset before inserting it to the database since
+ while inserting this thread might block and so would
+ unnecessarily let the receiver wait. */
writeall (fd, &dataset->resp, dataset->head.recsize);
- }
+ maybe_cache_add:
if (cacheable)
{
/* If necessary, we also propagate the data to disk. */
--
2.35.3

389
glibc-CVE-2024-33601-CVE-2024-33602-nscd-netgroup-Use-two.patch Normal file
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@ -0,0 +1,389 @@
From c04a21e050d64a1193a6daab872bca2528bda44b Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 25 Apr 2024 15:01:07 +0200
Subject: [PATCH 4/4] CVE-2024-33601, CVE-2024-33602: nscd: netgroup: Use two
buffers in addgetnetgrentX (bug 31680)
This avoids potential memory corruption when the underlying NSS
callback function does not use the buffer space to store all strings
(e.g., for constant strings).
Instead of custom buffer management, two scratch buffers are used.
This increases stack usage somewhat.
Scratch buffer allocation failure is handled by return -1
(an invalid timeout value) instead of terminating the process.
This fixes bug 31679.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
---
nscd/netgroupcache.c | 219 ++++++++++++++++++++++++-------------------
1 file changed, 121 insertions(+), 98 deletions(-)
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
index e22ffa5884..e8fe041846 100644
--- a/nscd/netgroupcache.c
+++ b/nscd/netgroupcache.c
@@ -23,6 +23,7 @@
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
+#include <scratch_buffer.h>
#include "../inet/netgroup.h"
#include "nscd.h"
@@ -65,6 +66,16 @@ struct dataset
char strdata[0];
};
+/* Send a notfound response to FD. Always returns -1 to indicate an
+ ephemeral error. */
+static time_t
+send_notfound (int fd)
+{
+ if (fd != -1)
+ TEMP_FAILURE_RETRY (send (fd, &notfound, sizeof (notfound), MSG_NOSIGNAL));
+ return -1;
+}
+
/* Sends a notfound message and prepares a notfound dataset to write to the
cache. Returns true if there was enough memory to allocate the dataset and
returns the dataset in DATASETP, total bytes to write in TOTALP and the
@@ -83,8 +94,7 @@ do_notfound (struct database_dyn *db, int fd, request_header *req,
total = sizeof (notfound);
timeout = time (NULL) + db->negtimeout;
- if (fd != -1)
- TEMP_FAILURE_RETRY (send (fd, &notfound, total, MSG_NOSIGNAL));
+ send_notfound (fd);
dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1);
/* If we cannot permanently store the result, so be it. */
@@ -109,11 +119,78 @@ do_notfound (struct database_dyn *db, int fd, request_header *req,
return cacheable;
}
+struct addgetnetgrentX_scratch
+{
+ /* This is the result that the caller should use. It can be NULL,
+ point into buffer, or it can be in the cache. */
+ struct dataset *dataset;
+
+ struct scratch_buffer buffer;
+
+ /* Used internally in addgetnetgrentX as a staging area. */
+ struct scratch_buffer tmp;
+
+ /* Number of bytes in buffer that are actually used. */
+ size_t buffer_used;
+};
+
+static void
+addgetnetgrentX_scratch_init (struct addgetnetgrentX_scratch *scratch)
+{
+ scratch->dataset = NULL;
+ scratch_buffer_init (&scratch->buffer);
+ scratch_buffer_init (&scratch->tmp);
+
+ /* Reserve space for the header. */
+ scratch->buffer_used = sizeof (struct dataset);
+ static_assert (sizeof (struct dataset) < sizeof (scratch->tmp.__space),
+ "initial buffer space");
+ memset (scratch->tmp.data, 0, sizeof (struct dataset));
+}
+
+static void
+addgetnetgrentX_scratch_free (struct addgetnetgrentX_scratch *scratch)
+{
+ scratch_buffer_free (&scratch->buffer);
+ scratch_buffer_free (&scratch->tmp);
+}
+
+/* Copy LENGTH bytes from S into SCRATCH. Returns NULL if SCRATCH
+ could not be resized, otherwise a pointer to the copy. */
+static char *
+addgetnetgrentX_append_n (struct addgetnetgrentX_scratch *scratch,
+ const char *s, size_t length)
+{
+ while (true)
+ {
+ size_t remaining = scratch->buffer.length - scratch->buffer_used;
+ if (remaining >= length)
+ break;
+ if (!scratch_buffer_grow_preserve (&scratch->buffer))
+ return NULL;
+ }
+ char *copy = scratch->buffer.data + scratch->buffer_used;
+ memcpy (copy, s, length);
+ scratch->buffer_used += length;
+ return copy;
+}
+
+/* Copy S into SCRATCH, including its null terminator. Returns false
+ if SCRATCH could not be resized. */
+static bool
+addgetnetgrentX_append (struct addgetnetgrentX_scratch *scratch, const char *s)
+{
+ if (s == NULL)
+ s = "";
+ return addgetnetgrentX_append_n (scratch, s, strlen (s) + 1) != NULL;
+}
+
+/* Caller must initialize and free *SCRATCH. If the return value is
+ negative, this function has sent a notfound response. */
static time_t
addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
const char *key, uid_t uid, struct hashentry *he,
- struct datahead *dh, struct dataset **resultp,
- void **tofreep)
+ struct datahead *dh, struct addgetnetgrentX_scratch *scratch)
{
if (__glibc_unlikely (debug_level > 0))
{
@@ -132,14 +209,10 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
char *key_copy = NULL;
struct __netgrent data;
- size_t buflen = MAX (1024, sizeof (*dataset) + req->key_len);
- size_t buffilled = sizeof (*dataset);
- char *buffer = NULL;
size_t nentries = 0;
size_t group_len = strlen (key) + 1;
struct name_list *first_needed
= alloca (sizeof (struct name_list) + group_len);
- *tofreep = NULL;
if (netgroup_database == NULL
&& !__nss_database_get (nss_database_netgroup, &netgroup_database))
@@ -151,8 +224,6 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
}
memset (&data, '\0', sizeof (data));
- buffer = xmalloc (buflen);
- *tofreep = buffer;
first_needed->next = first_needed;
memcpy (first_needed->name, key, group_len);
data.needed_groups = first_needed;
@@ -195,8 +266,8 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
while (1)
{
int e;
- status = getfct.f (&data, buffer + buffilled,
- buflen - buffilled - req->key_len, &e);
+ status = getfct.f (&data, scratch->tmp.data,
+ scratch->tmp.length, &e);
if (status == NSS_STATUS_SUCCESS)
{
if (data.type == triple_val)
@@ -204,68 +275,10 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
const char *nhost = data.val.triple.host;
const char *nuser = data.val.triple.user;
const char *ndomain = data.val.triple.domain;
-
- size_t hostlen = strlen (nhost ?: "") + 1;
- size_t userlen = strlen (nuser ?: "") + 1;
- size_t domainlen = strlen (ndomain ?: "") + 1;
-
- if (nhost == NULL || nuser == NULL || ndomain == NULL
- || nhost > nuser || nuser > ndomain)
- {
- const char *last = nhost;
- if (last == NULL
- || (nuser != NULL && nuser > last))
- last = nuser;
- if (last == NULL
- || (ndomain != NULL && ndomain > last))
- last = ndomain;
-
- size_t bufused
- = (last == NULL
- ? buffilled
- : last + strlen (last) + 1 - buffer);
-
- /* We have to make temporary copies. */
- size_t needed = hostlen + userlen + domainlen;
-
- if (buflen - req->key_len - bufused < needed)
- {
- buflen += MAX (buflen, 2 * needed);
- /* Save offset in the old buffer. We don't
- bother with the NULL check here since
- we'll do that later anyway. */
- size_t nhostdiff = nhost - buffer;
- size_t nuserdiff = nuser - buffer;
- size_t ndomaindiff = ndomain - buffer;
-
- char *newbuf = xrealloc (buffer, buflen);
- /* Fix up the triplet pointers into the new
- buffer. */
- nhost = (nhost ? newbuf + nhostdiff
- : NULL);
- nuser = (nuser ? newbuf + nuserdiff
- : NULL);
- ndomain = (ndomain ? newbuf + ndomaindiff
- : NULL);
- *tofreep = buffer = newbuf;
- }
-
- nhost = memcpy (buffer + bufused,
- nhost ?: "", hostlen);
- nuser = memcpy ((char *) nhost + hostlen,
- nuser ?: "", userlen);
- ndomain = memcpy ((char *) nuser + userlen,
- ndomain ?: "", domainlen);
- }
-
- char *wp = buffer + buffilled;
- wp = memmove (wp, nhost ?: "", hostlen);
- wp += hostlen;
- wp = memmove (wp, nuser ?: "", userlen);
- wp += userlen;
- wp = memmove (wp, ndomain ?: "", domainlen);
- wp += domainlen;
- buffilled = wp - buffer;
+ if (!(addgetnetgrentX_append (scratch, nhost)
+ && addgetnetgrentX_append (scratch, nuser)
+ && addgetnetgrentX_append (scratch, ndomain)))
+ return send_notfound (fd);
++nentries;
}
else
@@ -317,8 +330,8 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
}
else if (status == NSS_STATUS_TRYAGAIN && e == ERANGE)
{
- buflen *= 2;
- *tofreep = buffer = xrealloc (buffer, buflen);
+ if (!scratch_buffer_grow (&scratch->tmp))
+ return send_notfound (fd);
}
else if (status == NSS_STATUS_RETURN
|| status == NSS_STATUS_NOTFOUND
@@ -351,10 +364,17 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
goto maybe_cache_add;
}
- total = buffilled;
+ /* Capture the result size without the key appended. */
+ total = scratch->buffer_used;
+
+ /* Make a copy of the key. The scratch buffer must not move after
+ this point. */
+ key_copy = addgetnetgrentX_append_n (scratch, key, req->key_len);
+ if (key_copy == NULL)
+ return send_notfound (fd);
/* Fill in the dataset. */
- dataset = (struct dataset *) buffer;
+ dataset = scratch->buffer.data;
timeout = datahead_init_pos (&dataset->head, total + req->key_len,
total - offsetof (struct dataset, resp),
he == NULL ? 0 : dh->nreloads + 1,
@@ -363,11 +383,7 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
dataset->resp.version = NSCD_VERSION;
dataset->resp.found = 1;
dataset->resp.nresults = nentries;
- dataset->resp.result_len = buffilled - sizeof (*dataset);
-
- assert (buflen - buffilled >= req->key_len);
- key_copy = memcpy (buffer + buffilled, key, req->key_len);
- buffilled += req->key_len;
+ dataset->resp.result_len = total - sizeof (*dataset);
/* Now we can determine whether on refill we have to create a new
record or not. */
@@ -398,7 +414,7 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
if (__glibc_likely (newp != NULL))
{
/* Adjust pointer into the memory block. */
- key_copy = (char *) newp + (key_copy - buffer);
+ key_copy = (char *) newp + (key_copy - (char *) dataset);
dataset = memcpy (newp, dataset, total + req->key_len);
cacheable = true;
@@ -439,7 +455,7 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
}
out:
- *resultp = dataset;
+ scratch->dataset = dataset;
return timeout;
}
@@ -460,6 +476,9 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
if (user != NULL)
key = strchr (key, '\0') + 1;
const char *domain = *key++ ? key : NULL;
+ struct addgetnetgrentX_scratch scratch;
+
+ addgetnetgrentX_scratch_init (&scratch);
if (__glibc_unlikely (debug_level > 0))
{
@@ -475,12 +494,8 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
group, group_len,
db, uid);
time_t timeout;
- void *tofree;
if (result != NULL)
- {
- timeout = result->head.timeout;
- tofree = NULL;
- }
+ timeout = result->head.timeout;
else
{
request_header req_get =
@@ -489,7 +504,10 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
.key_len = group_len
};
timeout = addgetnetgrentX (db, -1, &req_get, group, uid, NULL, NULL,
- &result, &tofree);
+ &scratch);
+ result = scratch.dataset;
+ if (timeout < 0)
+ goto out;
}
struct indataset
@@ -603,7 +621,7 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
}
out:
- free (tofree);
+ addgetnetgrentX_scratch_free (&scratch);
return timeout;
}
@@ -613,11 +631,12 @@ addgetnetgrentX_ignore (struct database_dyn *db, int fd, request_header *req,
const char *key, uid_t uid, struct hashentry *he,
struct datahead *dh)
{
- struct dataset *ignore;
- void *tofree;
- time_t timeout = addgetnetgrentX (db, fd, req, key, uid, he, dh,
- &ignore, &tofree);
- free (tofree);
+ struct addgetnetgrentX_scratch scratch;
+ addgetnetgrentX_scratch_init (&scratch);
+ time_t timeout = addgetnetgrentX (db, fd, req, key, uid, he, dh, &scratch);
+ addgetnetgrentX_scratch_free (&scratch);
+ if (timeout < 0)
+ timeout = 0;
return timeout;
}
@@ -661,5 +680,9 @@ readdinnetgr (struct database_dyn *db, struct hashentry *he,
.key_len = he->len
};
- return addinnetgrX (db, -1, &req, db->data + he->key, he->owner, he, dh);
+ int timeout = addinnetgrX (db, -1, &req, db->data + he->key, he->owner,
+ he, dh);
+ if (timeout < 0)
+ timeout = 0;
+ return timeout;
}
--
2.35.3

67
glibc.changes
View File

@ -1,3 +1,70 @@
-------------------------------------------------------------------
Thu Jul 18 08:31:37 UTC 2024 - Andreas Schwab <schwab@suse.de>
- s390x-wcsncmp.patch: s390x: Fix segfault in wcsncmp (bsc#1228041, BZ
#31934)
-------------------------------------------------------------------
Wed May 29 10:41:20 UTC 2024 - Andreas Schwab <schwab@suse.de>
- Fix typo in last change
-------------------------------------------------------------------
Thu May 23 11:31:34 UTC 2024 - Andreas Schwab <schwab@suse.de>
- Also include stat64 in the 32-bit libc_nonshared.a workaround
(bsc#1221482)
-------------------------------------------------------------------
Wed May 8 14:06:39 UTC 2024 - Giuliano Belinassi <giuliano.belinassi@suse.com>
- ulp-prologue-into-asm-functions.patch: Avoid creating ULP prologue
for _start routine (bsc#1221940)
-------------------------------------------------------------------
Tue May 7 10:32:54 UTC 2024 - Andreas Schwab <schwab@suse.de>
- nscd-netgroup-cache-timeout.patch: Use time_t for return type of
addgetnetgrentX (CVE-2024-33602, bsc#1223425)
- Also add libc_nonshared.a workaround to 32-bit x86 compat package
(bsc#1221482)
-------------------------------------------------------------------
Wed May 1 23:50:51 UTC 2024 - Giuliano Belinassi <giuliano.belinassi@suse.com>
- glibc-CVE-2024-33599-nscd-Stack-based-buffer-overflow-in-n.patch:
nscd: Stack-based buffer overflow in netgroup cache
(CVE-2024-33599, bsc#1223423, BZ #31677)
- glibc-CVE-2024-33600-nscd-Avoid-null-pointer-crashes-after.patch:
nscd: Avoid null pointer crashes after notfound response
(CVE-2024-33600, bsc#1223424, BZ #31678)
- glibc-CVE-2024-33600-nscd-Do-not-send-missing-not-found-re.patch:
nscd: Do not send missing not-found response in addgetnetgrentX
(CVE-2024-33600, bsc#1223424, BZ #31678)
- glibc-CVE-2024-33601-CVE-2024-33602-nscd-netgroup-Use-two.patch:
netgroup: Use two buffers in addgetnetgrentX (CVE-2024-33601,
CVE-2024-33602, bsc#1223425, BZ #31680)
-------------------------------------------------------------------
Thu Apr 18 08:22:48 UTC 2024 - Andreas Schwab <schwab@suse.de>
- iconv-iso-2022-cn-ext.patch: iconv: ISO-2022-CN-EXT: fix out-of-bound
writes when writing escape sequence (CVE-2024-2961, bsc#1222992)
-------------------------------------------------------------------
Wed Apr 3 15:54:02 UTC 2024 - Andreas Schwab <schwab@suse.de>
- Add workaround for invalid use of libc_nonshared.a with non-SUSE libc
(bsc#1221482)
-------------------------------------------------------------------
Thu Mar 21 13:22:51 UTC 2024 - Andreas Schwab <schwab@suse.de>
- malloc-arena-get2.patch: malloc: Use __get_nprocs on arena_get2 (BZ
#30945)
- sched-getcpu-rseq-area.patch: linux: Use rseq area unconditionally in
sched_getcpu (BZ #31479)
-------------------------------------------------------------------
Mon Mar 11 10:06:42 UTC 2024 - Andreas Schwab <schwab@suse.de>

47
glibc.spec
View File

@ -343,6 +343,24 @@ Patch1022: qsort-invalid-cmp.patch
Patch1023: s390-clone-error-clobber-r7.patch
# PATCH-FIX-UPSTREAM duplocale: protect use of global locale (BZ #23970)
Patch1024: duplocale-global-locale.patch
# PATCH-FIX-UPSTREAM malloc: Use __get_nprocs on arena_get2 (BZ #30945)
Patch1025: malloc-arena-get2.patch
# PATCH-FIX-UPSTREAM linux: Use rseq area unconditionally in sched_getcpu (BZ #31479)
Patch1026: sched-getcpu-rseq-area.patch
# PATCH-FIX-UPSTREAM iconv: ISO-2022-CN-EXT: fix out-of-bound writes when writing escape sequence (CVE-2024-2961)
Patch1027: iconv-iso-2022-cn-ext.patch
# PATCH-FIX-UPSTREAM nscd: Stack-based buffer overflow in netgroup cache (CVE-2024-33599, BZ #31677)
Patch1028: glibc-CVE-2024-33599-nscd-Stack-based-buffer-overflow-in-n.patch
# PATCH-FIX-UPSTREAM nscd: Do not send missing not found response in addgetnetgrentX (CVE-2024-33600, BZ #31678)
Patch1029: glibc-CVE-2024-33600-nscd-Do-not-send-missing-not-found-re.patch
# PATCH-FIX-UPSTREAM nscd: Avoid null pointer crashes after notfound response (CVE-2024-33600, BZ #31678)
Patch1030: glibc-CVE-2024-33600-nscd-Avoid-null-pointer-crashes-after.patch
# PATCH-FIX-UPSTREAM nscd netgroup: Use two buffers in addgetnetgrentX (CVE-2024-33601, CVE-2024-33602, BZ #31680)
Patch1031: glibc-CVE-2024-33601-CVE-2024-33602-nscd-netgroup-Use-two.patch
# PATCH-FIX-UPSTREAM nscd: Use time_t for return type of addgetnetgrentX (CVE-2024-33602)
Patch1032: nscd-netgroup-cache-timeout.patch
# PATCH-FIX-UPSTREAM s390x: Fix segfault in wcsncmp (BZ #31934)
Patch1033: s390x-wcsncmp.patch
###
# Patches awaiting upstream approval
@ -750,6 +768,35 @@ echo 'CFLAGS-.os += -fdump-ipa-clones' \
%endif
make %{?_smp_mflags} %{?make_output_sync}
%if %{build_main} && 0%{?sle_version}
%ifarch x86_64 i686
# Horrible workaround for bsc#1221482
xstatbuild ()
{
gcc -O2 -I ../sysdeps/unix/sysv/linux/x86 -xc - -c -o $1stat$2.oS <<EOF
#include <xstatver.h>
int __$1xstat$2 (int, $3, void *);
int
$1stat$2 ($3 file, void *buf)
{
return __$1xstat$2 (_STAT_VER, file, buf);
}
EOF
ar r libc_nonshared.a $1stat$2.oS
}
xstatbuild "" "" "const char *"
xstatbuild f "" int
xstatbuild l "" "const char *"
%ifarch i686
xstatbuild "" 64 "const char *"
xstatbuild f 64 int
xstatbuild l 64 "const char *"
%endif
%endif
%endif
cd ..
#

216
iconv-iso-2022-cn-ext.patch Normal file
View File

@ -0,0 +1,216 @@
From e1135387deded5d73924f6ca20c72a35dc8e1bda Mon Sep 17 00:00:00 2001
From: Charles Fol <folcharles@gmail.com>
Date: Thu, 28 Mar 2024 12:25:38 -0300
Subject: [PATCH] iconv: ISO-2022-CN-EXT: fix out-of-bound writes when writing
escape sequence (CVE-2024-2961)
ISO-2022-CN-EXT uses escape sequences to indicate character set changes
(as specified by RFC 1922). While the SOdesignation has the expected
bounds checks, neither SS2designation nor SS3designation have its;
allowing a write overflow of 1, 2, or 3 bytes with fixed values:
'$+I', '$+J', '$+K', '$+L', '$+M', or '$*H'.
Checked on aarch64-linux-gnu.
Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit f9dc609e06b1136bb0408be9605ce7973a767ada)
---
iconvdata/Makefile | 5 +-
iconvdata/iso-2022-cn-ext.c | 12 +++
iconvdata/tst-iconv-iso-2022-cn-ext.c | 128 ++++++++++++++++++++++++++
3 files changed, 144 insertions(+), 1 deletion(-)
create mode 100644 iconvdata/tst-iconv-iso-2022-cn-ext.c
diff --git a/iconvdata/Makefile b/iconvdata/Makefile
index dd5cafab21..075098dce8 100644
--- a/iconvdata/Makefile
+++ b/iconvdata/Makefile
@@ -75,7 +75,8 @@ ifeq (yes,$(build-shared))
tests = bug-iconv1 bug-iconv2 tst-loading tst-e2big tst-iconv4 bug-iconv4 \
tst-iconv6 bug-iconv5 bug-iconv6 tst-iconv7 bug-iconv8 bug-iconv9 \
bug-iconv10 bug-iconv11 bug-iconv12 tst-iconv-big5-hkscs-to-2ucs4 \
- bug-iconv13 bug-iconv14 bug-iconv15
+ bug-iconv13 bug-iconv14 bug-iconv15 \
+ tst-iconv-iso-2022-cn-ext
ifeq ($(have-thread-library),yes)
tests += bug-iconv3
endif
@@ -330,6 +331,8 @@ $(objpfx)bug-iconv14.out: $(addprefix $(objpfx), $(gconv-modules)) \
$(addprefix $(objpfx),$(modules.so))
$(objpfx)bug-iconv15.out: $(addprefix $(objpfx), $(gconv-modules)) \
$(addprefix $(objpfx),$(modules.so))
+$(objpfx)tst-iconv-iso-2022-cn-ext.out: $(addprefix $(objpfx), $(gconv-modules)) \
+ $(addprefix $(objpfx),$(modules.so))
$(objpfx)iconv-test.out: run-iconv-test.sh \
$(addprefix $(objpfx), $(gconv-modules)) \
diff --git a/iconvdata/iso-2022-cn-ext.c b/iconvdata/iso-2022-cn-ext.c
index 36727f0865..9bb02238a3 100644
--- a/iconvdata/iso-2022-cn-ext.c
+++ b/iconvdata/iso-2022-cn-ext.c
@@ -574,6 +574,12 @@ DIAG_IGNORE_Os_NEEDS_COMMENT (5, "-Wmaybe-uninitialized");
{ \
const char *escseq; \
\
+ if (outptr + 4 > outend) \
+ { \
+ result = __GCONV_FULL_OUTPUT; \
+ break; \
+ } \
+ \
assert (used == CNS11643_2_set); /* XXX */ \
escseq = "*H"; \
*outptr++ = ESC; \
@@ -587,6 +593,12 @@ DIAG_IGNORE_Os_NEEDS_COMMENT (5, "-Wmaybe-uninitialized");
{ \
const char *escseq; \
\
+ if (outptr + 4 > outend) \
+ { \
+ result = __GCONV_FULL_OUTPUT; \
+ break; \
+ } \
+ \
assert ((used >> 5) >= 3 && (used >> 5) <= 7); \
escseq = "+I+J+K+L+M" + ((used >> 5) - 3) * 2; \
*outptr++ = ESC; \
diff --git a/iconvdata/tst-iconv-iso-2022-cn-ext.c b/iconvdata/tst-iconv-iso-2022-cn-ext.c
new file mode 100644
index 0000000000..96a8765fd5
--- /dev/null
+++ b/iconvdata/tst-iconv-iso-2022-cn-ext.c
@@ -0,0 +1,128 @@
+/* Verify ISO-2022-CN-EXT does not write out of the bounds.
+ Copyright (C) 2024 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 <stdio.h>
+#include <string.h>
+
+#include <errno.h>
+#include <iconv.h>
+#include <sys/mman.h>
+
+#include <support/xunistd.h>
+#include <support/check.h>
+#include <support/support.h>
+
+/* The test sets up a two memory page buffer with the second page marked
+ PROT_NONE to trigger a fault if the conversion writes beyond the exact
+ expected amount. Then we carry out various conversions and precisely
+ place the start of the output buffer in order to trigger a SIGSEGV if the
+ process writes anywhere between 1 and page sized bytes more (only one
+ PROT_NONE page is setup as a canary) than expected. These tests exercise
+ all three of the cases in ISO-2022-CN-EXT where the converter must switch
+ character sets and may run out of buffer space while doing the
+ operation. */
+
+static int
+do_test (void)
+{
+ iconv_t cd = iconv_open ("ISO-2022-CN-EXT", "UTF-8");
+ TEST_VERIFY_EXIT (cd != (iconv_t) -1);
+
+ char *ntf;
+ size_t ntfsize;
+ char *outbufbase;
+ {
+ int pgz = getpagesize ();
+ TEST_VERIFY_EXIT (pgz > 0);
+ ntfsize = 2 * pgz;
+
+ ntf = xmmap (NULL, ntfsize, PROT_READ | PROT_WRITE, MAP_PRIVATE
+ | MAP_ANONYMOUS, -1);
+ xmprotect (ntf + pgz, pgz, PROT_NONE);
+
+ outbufbase = ntf + pgz;
+ }
+
+ /* Check if SOdesignation escape sequence does not trigger an OOB write. */
+ {
+ char inbuf[] = "\xe4\xba\xa4\xe6\x8d\xa2";
+
+ for (int i = 0; i < 9; i++)
+ {
+ char *inp = inbuf;
+ size_t inleft = sizeof (inbuf) - 1;
+
+ char *outp = outbufbase - i;
+ size_t outleft = i;
+
+ TEST_VERIFY_EXIT (iconv (cd, &inp, &inleft, &outp, &outleft)
+ == (size_t) -1);
+ TEST_COMPARE (errno, E2BIG);
+
+ TEST_VERIFY_EXIT (iconv (cd, NULL, NULL, NULL, NULL) == 0);
+ }
+ }
+
+ /* Same as before for SS2designation. */
+ {
+ char inbuf[] = "㴽 \xe3\xb4\xbd";
+
+ for (int i = 0; i < 14; i++)
+ {
+ char *inp = inbuf;
+ size_t inleft = sizeof (inbuf) - 1;
+
+ char *outp = outbufbase - i;
+ size_t outleft = i;
+
+ TEST_VERIFY_EXIT (iconv (cd, &inp, &inleft, &outp, &outleft)
+ == (size_t) -1);
+ TEST_COMPARE (errno, E2BIG);
+
+ TEST_VERIFY_EXIT (iconv (cd, NULL, NULL, NULL, NULL) == 0);
+ }
+ }
+
+ /* Same as before for SS3designation. */
+ {
+ char inbuf[] = "劄 \xe5\x8a\x84";
+
+ for (int i = 0; i < 14; i++)
+ {
+ char *inp = inbuf;
+ size_t inleft = sizeof (inbuf) - 1;
+
+ char *outp = outbufbase - i;
+ size_t outleft = i;
+
+ TEST_VERIFY_EXIT (iconv (cd, &inp, &inleft, &outp, &outleft)
+ == (size_t) -1);
+ TEST_COMPARE (errno, E2BIG);
+
+ TEST_VERIFY_EXIT (iconv (cd, NULL, NULL, NULL, NULL) == 0);
+ }
+ }
+
+ TEST_VERIFY_EXIT (iconv_close (cd) != -1);
+
+ xmunmap (ntf, ntfsize);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
--
2.44.0

106
malloc-arena-get2.patch Normal file
View File

@ -0,0 +1,106 @@
From 506e47da1d66b33e24440a495eeef85daf7f2a78 Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Wed, 11 Oct 2023 13:43:56 -0300
Subject: [PATCH] malloc: Use __get_nprocs on arena_get2 (BZ 30945)
This restore the 2.33 semantic for arena_get2. It was changed by
11a02b035b46 to avoid arena_get2 call malloc (back when __get_nproc
was refactored to use an scratch_buffer - 903bc7dcc2acafc). The
__get_nproc was refactored over then and now it also avoid to call
malloc.
The 11a02b035b46 did not take in consideration any performance
implication, which should have been discussed properly. The
__get_nprocs_sched is still used as a fallback mechanism if procfs
and sysfs is not acessible.
Checked on x86_64-linux-gnu.
Reviewed-by: DJ Delorie <dj@redhat.com>
(cherry picked from commit 472894d2cfee5751b44c0aaa71ed87df81c8e62e)
---
include/sys/sysinfo.h | 4 ----
malloc/arena.c | 2 +-
misc/getsysstats.c | 6 ------
sysdeps/mach/getsysstats.c | 6 ------
sysdeps/unix/sysv/linux/getsysstats.c | 2 +-
5 files changed, 2 insertions(+), 18 deletions(-)
diff --git a/include/sys/sysinfo.h b/include/sys/sysinfo.h
index c490561581..65742b1036 100644
--- a/include/sys/sysinfo.h
+++ b/include/sys/sysinfo.h
@@ -14,10 +14,6 @@ libc_hidden_proto (__get_nprocs_conf)
extern int __get_nprocs (void);
libc_hidden_proto (__get_nprocs)
-/* Return the number of available processors which the process can
- be scheduled. */
-extern int __get_nprocs_sched (void) attribute_hidden;
-
/* Return number of physical pages of memory in the system. */
extern long int __get_phys_pages (void);
libc_hidden_proto (__get_phys_pages)
diff --git a/malloc/arena.c b/malloc/arena.c
index 6f03955ff2..82b09adb47 100644
--- a/malloc/arena.c
+++ b/malloc/arena.c
@@ -820,7 +820,7 @@ arena_get2 (size_t size, mstate avoid_arena)
narenas_limit = mp_.arena_max;
else if (narenas > mp_.arena_test)
{
- int n = __get_nprocs_sched ();
+ int n = __get_nprocs ();
if (n >= 1)
narenas_limit = NARENAS_FROM_NCORES (n);
diff --git a/misc/getsysstats.c b/misc/getsysstats.c
index 5f36adc0e8..23cc112074 100644
--- a/misc/getsysstats.c
+++ b/misc/getsysstats.c
@@ -44,12 +44,6 @@ weak_alias (__get_nprocs, get_nprocs)
link_warning (get_nprocs, "warning: get_nprocs will always return 1")
-int
-__get_nprocs_sched (void)
-{
- return 1;
-}
-
long int
__get_phys_pages (void)
{
diff --git a/sysdeps/mach/getsysstats.c b/sysdeps/mach/getsysstats.c
index 5184e5eee1..d3834f3b69 100644
--- a/sysdeps/mach/getsysstats.c
+++ b/sysdeps/mach/getsysstats.c
@@ -62,12 +62,6 @@ __get_nprocs (void)
libc_hidden_def (__get_nprocs)
weak_alias (__get_nprocs, get_nprocs)
-int
-__get_nprocs_sched (void)
-{
- return __get_nprocs ();
-}
-
/* Return the number of physical pages on the system. */
long int
__get_phys_pages (void)
diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
index b0b6c154ac..1ea7f1f01f 100644
--- a/sysdeps/unix/sysv/linux/getsysstats.c
+++ b/sysdeps/unix/sysv/linux/getsysstats.c
@@ -29,7 +29,7 @@
#include <sys/sysinfo.h>
#include <sysdep.h>
-int
+static int
__get_nprocs_sched (void)
{
enum
--
2.44.0

36
nscd-netgroup-cache-timeout.patch Normal file
View File

@ -0,0 +1,36 @@
From f510d75ff7f7405328853bd67b75f6847dfe9d31 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 2 May 2024 17:06:19 +0200
Subject: [PATCH] nscd: Use time_t for return type of addgetnetgrentX
Using int may give false results for future dates (timeouts after the
year 2028).
Fixes commit 04a21e050d64a1193a6daab872bca2528bda44b ("CVE-2024-33601,
CVE-2024-33602: nscd: netgroup: Use two buffers in addgetnetgrentX
(bug 31680)").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 4bbca1a44691a6e9adcee5c6798a707b626bc331)
---
nscd/netgroupcache.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
index cc4e270c1f..a63b260fdb 100644
--- a/nscd/netgroupcache.c
+++ b/nscd/netgroupcache.c
@@ -680,8 +680,8 @@ readdinnetgr (struct database_dyn *db, struct hashentry *he,
.key_len = he->len
};
- int timeout = addinnetgrX (db, -1, &req, db->data + he->key, he->owner,
- he, dh);
+ time_t timeout = addinnetgrX (db, -1, &req, db->data + he->key, he->owner,
+ he, dh);
if (timeout < 0)
timeout = 0;
return timeout;
--
2.45.0

58
s390x-wcsncmp.patch Normal file
View File

@ -0,0 +1,58 @@
From 712453634c8efd71a9b3ff0122145a9e90e9955c Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.ibm.com>
Date: Thu, 11 Jul 2024 11:28:53 +0200
Subject: [PATCH] s390x: Fix segfault in wcsncmp [BZ #31934]
The z13/vector-optimized wcsncmp implementation segfaults if n=1
and there is only one character (equal on both strings) before
the page end. Then it loads and compares one character and misses
to check n again. The following load fails.
This patch removes the extra load and compare of the first character
and just start with the loop which uses vector-load-to-block-boundary.
This code-path also checks n.
With this patch both tests are passing:
- the simplified one mentioned in the bugzilla 31934
- the full one in Florian Weimer's patch:
"manual: Document a GNU extension for strncmp/wcsncmp"
(https://patchwork.sourceware.org/project/glibc/patch/874j9eml6y.fsf@oldenburg.str.redhat.com/):
On s390x-linux-gnu (z16), the new wcsncmp test fails due to bug 31934.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 9b7651410375ec8848a1944992d663d514db4ba7)
---
sysdeps/s390/wcsncmp-vx.S | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/sysdeps/s390/wcsncmp-vx.S b/sysdeps/s390/wcsncmp-vx.S
index 1bf769b870..4028d1e624 100644
--- a/sysdeps/s390/wcsncmp-vx.S
+++ b/sysdeps/s390/wcsncmp-vx.S
@@ -59,14 +59,7 @@ ENTRY(WCSNCMP_Z13)
sllg %r4,%r4,2 /* Convert character-count to byte-count. */
locgrne %r4,%r1 /* Use max byte-count, if bit 0/1 was one. */
- /* Check first character without vector load. */
- lghi %r5,4 /* current_len = 4 bytes. */
- /* Check s1/2[0]. */
- lt %r0,0(%r2)
- l %r1,0(%r3)
- je .Lend_cmp_one_char
- crjne %r0,%r1,.Lend_cmp_one_char
-
+ lghi %r5,0 /* current_len = 0 bytes. */
.Lloop:
vlbb %v17,0(%r5,%r3),6 /* Load s2 to block boundary. */
vlbb %v16,0(%r5,%r2),6 /* Load s1 to block boundary. */
@@ -167,7 +160,6 @@ ENTRY(WCSNCMP_Z13)
srl %r4,2 /* And convert it to character-index. */
vlgvf %r0,%v16,0(%r4) /* Load character-values. */
vlgvf %r1,%v17,0(%r4)
-.Lend_cmp_one_char:
cr %r0,%r1
je .Lend_equal
lghi %r2,1
--
2.45.2

52
sched-getcpu-rseq-area.patch Normal file
View File

@ -0,0 +1,52 @@
From 5753cda1ca0749002c4718122a9b6d5177087b7b Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Fri, 15 Mar 2024 19:08:24 +0100
Subject: [PATCH] linux: Use rseq area unconditionally in sched_getcpu (bug
31479)
Originally, nptl/descr.h included <sys/rseq.h>, but we removed that
in commit 2c6b4b272e6b4d07303af25709051c3e96288f2d ("nptl:
Unconditionally use a 32-byte rseq area"). After that, it was
not ensured that the RSEQ_SIG macro was defined during sched_getcpu.c
compilation that provided a definition. This commit always checks
the rseq area for CPU number information before using the other
approaches.
This adds an unnecessary (but well-predictable) branch on
architectures which do not define RSEQ_SIG, but its cost is small
compared to the system call. Most architectures that have vDSO
acceleration for getcpu also have rseq support.
Fixes: 2c6b4b272e6b4d07303af25709051c3e96288f2d
Fixes: 1d350aa06091211863e41169729cee1bca39f72f
Reviewed-by: Arjun Shankar <arjun@redhat.com>
(cherry picked from commit 7a76f218677d149d8b7875b336722108239f7ee9)
---
sysdeps/unix/sysv/linux/sched_getcpu.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/sched_getcpu.c b/sysdeps/unix/sysv/linux/sched_getcpu.c
index 4457d714bc..22700ef846 100644
--- a/sysdeps/unix/sysv/linux/sched_getcpu.c
+++ b/sysdeps/unix/sysv/linux/sched_getcpu.c
@@ -33,17 +33,9 @@ vsyscall_sched_getcpu (void)
return r == -1 ? r : cpu;
}
-#ifdef RSEQ_SIG
int
sched_getcpu (void)
{
int cpu_id = THREAD_GETMEM_VOLATILE (THREAD_SELF, rseq_area.cpu_id);
return __glibc_likely (cpu_id >= 0) ? cpu_id : vsyscall_sched_getcpu ();
}
-#else /* RSEQ_SIG */
-int
-sched_getcpu (void)
-{
- return vsyscall_sched_getcpu ();
-}
-#endif /* RSEQ_SIG */
--
2.44.0

51
ulp-prologue-into-asm-functions.patch
View File

@ -153,19 +153,19 @@ index 0b3483a77a..329c16306e 100644
+/* For 32-bit glibc then define those macros as empty. */
+#ifndef ULP_PRE_PROLOGUE
+# define ULP_PRE_PROLOGUE
+# define ULP_PRE_PROLOGUE(name)
+#endif
+#ifndef ULP_POST_PROLOGUE
+# define ULP_POST_PROLOGUE
+# define ULP_POST_PROLOGUE(name)
+#endif
+
+/* Define the first instructions of a function. */
+#define FUNCTION_START(name) \
+ ULP_PRE_PROLOGUE; \
+ ULP_PRE_PROLOGUE(name); \
+ C_LABEL(name); \
+ cfi_startproc; \
+ _CET_ENDBR; \
+ ULP_POST_PROLOGUE; \
+ ULP_POST_PROLOGUE(name); \
+ CALL_MCOUNT;
+
/* Define an entry point visible from C. */
@ -230,10 +230,10 @@ index cbb22884eb..327377daa6 100644
/*
* This implementation uses SSE to compare up to 16 bytes at a time.
diff --git a/sysdeps/x86_64/sysdep.h b/sysdeps/x86_64/sysdep.h
index 6ca169573d..c18f0ef914 100644
index c8ad778fee..59c278eb58 100644
--- a/sysdeps/x86_64/sysdep.h
+++ b/sysdeps/x86_64/sysdep.h
@@ -24,6 +24,19 @@
@@ -23,6 +23,46 @@
#ifdef __ASSEMBLER__
@ -242,12 +242,39 @@ index 6ca169573d..c18f0ef914 100644
+ written in ASM, the way we do this is by adding this prologue manually. */
+
+#if ENABLE_USERSPACE_LIVEPATCH
+# undef ULP_PRE_PROLOGUE
+# undef ULP_POST_PROLOGUE
+# define ULP_PRE_PROLOGUE \
+ .rept 14; nop; .endr
+# define ULP_POST_PROLOGUE \
+ xchg %ax, %ax
+
+/* Instructions to be inserted before the function label. */
+# define ULP_NOPS_PRE_PROLOGUE .rept 14; nop; .endr
+
+/* Instruction to be inserted after the function label. */
+# define ULP_NOPS_POST_PROLOGUE .rept 2; nop; .endr
+
+
+/* this macro expands according to the following condition:
+ * if name = _start, then the prologue is not inserted.
+ * if name = _dl_relocate_static_pie, then the prologue is not inserted.
+ * if name = anything else, then the prologue is inserted.
+ **/
+# define __ULP_POST_PROLOGUE_dl_relocate_static_pie ,
+# define __ULP_PRE_PROLOGUE_start ,
+# define __ULP_PRE_PROLOGUE(x, y,...) y
+# define _ULP_PRE_PROLOGUE(x, ...) __ULP_PRE_PROLOGUE(x, __VA_ARGS__)
+# define ULP_PRE_PROLOGUE(name) _ULP_PRE_PROLOGUE(__ULP_PRE_PROLOGUE##name, ULP_NOPS_PRE_PROLOGUE,)
+
+/* this macro expands according to the following condition:
+ * if name = _start, then the postlogue is not inserted.
+ * if name = _dl_relocate_static_pie, then the postlogue is not inserted.
+ * if name = anything else, then the postlogue is inserted.
+ **/
+# define __ULP_POST_PROLOGUE_dl_relocate_static_pie ,
+# define __ULP_POST_PROLOGUE_start ,
+# define __ULP_POST_PROLOGUE(x, y,...) y
+# define _ULP_POST_PROLOGUE(x, ...) __ULP_POST_PROLOGUE(x, __VA_ARGS__)
+# define ULP_POST_PROLOGUE(name) _ULP_POST_PROLOGUE(__ULP_POST_PROLOGUE##name, ULP_NOPS_POST_PROLOGUE,)
+
+#else
+# define ULP_PRE_PROLOGUE(name)
+# define ULP_POST_PROLOGUE(name)
+#endif
+
/* Syntactic details of assembler. */