One other note, I only get the "unexpected memory mapping" error on amd64. On arm64 machines with 6.5.0-25.25~22.04.1, ThreadSanitizer works without issues.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-6.5 in Ubuntu. https://bugs.launchpad.net/bugs/2056762 Title: ThreadSanitizer: unexpected memory mapping with 6.5.0-25.25~22.04.1 Status in linux-signed-hwe-6.5 package in Ubuntu: New Bug description: We updated a number of (amd64) machines from linux- image-6.5.0-21-generic (6.5.0-21.21~22.04.1) to linux- image-6.5.0-25-generic (6.5.0-25.25~22.04.1), and this caused ThreadSanitizer-instrumented programs to immediately exit with an error similar to: FATAL: ThreadSanitizer: unexpected memory mapping 0x5c4dc2bcd000-0x5c4dc2bed000 Reverting the kernel back to 6.5.0-21.21~22.04.1 and rebooting makes the same executables work again. There are a few older bugs including https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67308 and https://github.com/google/sanitizers/issues/503 but these are from ~2015, and about gcc 7 and linux 4.1 so it does not seem to be the same problem. A very small program, lifted from https://github.com/google/sanitizers/wiki/ThreadSanitizerCppManual can be used to show the problem: $ cat simple-race.c #include <pthread.h> #include <stdio.h> int Global; void *Thread1(void *x) { Global++; return NULL; } void *Thread2(void *x) { Global--; return NULL; } int main() { pthread_t t[2]; pthread_create(&t[0], NULL, Thread1, NULL); pthread_create(&t[1], NULL, Thread2, NULL); pthread_join(t[0], NULL); pthread_join(t[1], NULL); } $ cc -fsanitize=thread -fPIE -pie -g simple-race.c -o simple-race $ ./simple-race FATAL: ThreadSanitizer: unexpected memory mapping 0x5d161227c000-0x5d161227d000 $ uname -a Linux buildhost 6.5.0-25-generic #25~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Feb 20 16:09:15 UTC 2 x86_64 x86_64 x86_64 GNU/Linux When running that exact same binary, on the same machine, but with linux 6.5.0-21: $ ./simple-race ================== WARNING: ThreadSanitizer: data race (pid=19373) Read of size 4 at 0x560964a2d014 by thread T2: #0 Thread2 /home/lxc-unpriv/simple-race.c:12 (simple-race+0x12d1) Previous write of size 4 at 0x560964a2d014 by thread T1: #0 Thread1 /home/lxc-unpriv/simple-race.c:7 (simple-race+0x128c) Location is global 'Global' of size 4 at 0x560964a2d014 (simple- race+0x000000004014) Thread T2 (tid=19376, running) created by main thread at: #0 pthread_create ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:969 (libtsan.so.0+0x605b8) #1 main /home/lxc-unpriv/simple-race.c:19 (simple-race+0x1368) Thread T1 (tid=19375, finished) created by main thread at: #0 pthread_create ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:969 (libtsan.so.0+0x605b8) #1 main /home/lxc-unpriv/simple-race.c:18 (simple-race+0x1347) SUMMARY: ThreadSanitizer: data race /home/lxc-unpriv/simple-race.c:12 in Thread2 ================== ThreadSanitizer: reported 1 warnings $ uname -a Linux buildhost 6.5.0-21-generic #21~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Feb 9 13:32:52 UTC 2 x86_64 x86_64 x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.5/+bug/2056762/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
