forked from pool/libvirt
bb05d1aab0
- libxl: Fix libvirtd deadlocks and segfaults 23b51d7b-libxl-disable-death-event.patch, a4e6fba0-libxl-rename-threadinfo-struct.patch, e4f7589a-libxl-shutdown-thread-name.patch, b9a5faea-libxl-handle-death-thread.patch, 5c5df531-libxl-search-domid-in-thread.patch, a7a03324-libxl-protect-logger-access.patch bsc#1191668, bsc#1192017 OBS-URL: https://build.opensuse.org/request/show/935299 OBS-URL: https://build.opensuse.org/package/show/Virtualization/libvirt?expand=0&rev=914
85 lines
2.7 KiB
Diff
85 lines
2.7 KiB
Diff
commit a7a03324d86e111f81687b5315b8f296dde84340
|
|
Author: Jim Fehlig <jfehlig@suse.com>
|
|
Date: Thu Nov 18 12:03:20 2021 -0700
|
|
|
|
libxl: Protect access to libxlLogger files hash table
|
|
|
|
The hash table of log file objects in libxlLogger is not protected against
|
|
concurrent access. It is possible for one thread to remove an entry while
|
|
another is updating it. Add a mutex to the libxlLogger object and lock it
|
|
when accessing the files hash table.
|
|
|
|
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
|
|
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
|
|
Reviewed-by: Ján Tomko <jtomko@redhat.com>
|
|
|
|
Index: libvirt-7.10.0/src/libxl/libxl_logger.c
|
|
===================================================================
|
|
--- libvirt-7.10.0.orig/src/libxl/libxl_logger.c
|
|
+++ libvirt-7.10.0/src/libxl/libxl_logger.c
|
|
@@ -28,6 +28,7 @@
|
|
#include "util/virfile.h"
|
|
#include "util/virhash.h"
|
|
#include "util/virstring.h"
|
|
+#include "util/virthread.h"
|
|
#include "util/virtime.h"
|
|
|
|
#define VIR_FROM_THIS VIR_FROM_LIBXL
|
|
@@ -43,6 +44,7 @@ struct xentoollog_logger_libvirt {
|
|
|
|
/* map storing the opened fds: "domid" -> FILE* */
|
|
GHashTable *files;
|
|
+ virMutex tableLock;
|
|
FILE *defaultLogFile;
|
|
};
|
|
|
|
@@ -85,7 +87,9 @@ libvirt_vmessage(xentoollog_logger *logg
|
|
start = start + 9;
|
|
*end = '\0';
|
|
|
|
+ virMutexLock(&lg->tableLock);
|
|
domainLogFile = virHashLookup(lg->files, start);
|
|
+ virMutexUnlock(&lg->tableLock);
|
|
if (domainLogFile)
|
|
logFile = domainLogFile;
|
|
|
|
@@ -158,6 +162,12 @@ libxlLoggerNew(const char *logDir, virLo
|
|
return NULL;
|
|
}
|
|
|
|
+ if (virMutexInit(&logger.tableLock) < 0) {
|
|
+ VIR_FORCE_FCLOSE(logger.defaultLogFile);
|
|
+ virHashFree(logger.files);
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
return XTL_NEW_LOGGER(libvirt, logger);
|
|
}
|
|
|
|
@@ -168,6 +178,7 @@ libxlLoggerFree(libxlLogger *logger)
|
|
if (logger->defaultLogFile)
|
|
VIR_FORCE_FCLOSE(logger->defaultLogFile);
|
|
virHashFree(logger->files);
|
|
+ virMutexDestroy(&logger->tableLock);
|
|
xtl_logger_destroy(xtl_logger);
|
|
}
|
|
|
|
@@ -189,7 +200,9 @@ libxlLoggerOpenFile(libxlLogger *logger,
|
|
path, g_strerror(errno));
|
|
return;
|
|
}
|
|
+ virMutexLock(&logger->tableLock);
|
|
ignore_value(virHashAddEntry(logger->files, domidstr, logFile));
|
|
+ virMutexUnlock(&logger->tableLock);
|
|
|
|
/* domain_config is non NULL only when starting a new domain */
|
|
if (domain_config) {
|
|
@@ -204,5 +217,7 @@ libxlLoggerCloseFile(libxlLogger *logger
|
|
g_autofree char *domidstr = NULL;
|
|
domidstr = g_strdup_printf("%d", id);
|
|
|
|
+ virMutexLock(&logger->tableLock);
|
|
ignore_value(virHashRemoveEntry(logger->files, domidstr));
|
|
+ virMutexUnlock(&logger->tableLock);
|
|
}
|