(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x000003fffdd2b232 in __GI_abort () at abort.c:79
#2 0x000003fffdb03a64 in log_assert_failed_realm () from
/lib/systemd/libsystemd-shared-243.so
#3 0x000002aa0000746e in test_memory_deny_write_execute_mmap () at
../src/test/test-seccomp.c:507
#4 0x000002aa00002a48 in main (argc=<optimized out>, argv=<optimized out>) at
../src/test/test-seccomp.c:987
The test is:
static void test_memory_deny_write_execute_mmap(void) {
...
if (pid == 0) {
void *p;
p = mmap(NULL, page_size(), PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
assert_se(p != MAP_FAILED);
assert_se(munmap(p, page_size()) >= 0);
p = mmap(NULL, page_size(), PROT_WRITE|PROT_READ,
MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
assert_se(p != MAP_FAILED);
assert_se(munmap(p, page_size()) >= 0);
assert_se(seccomp_memory_deny_write_execute() >= 0);
p = mmap(NULL, page_size(), PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
#if defined(__x86_64__) || defined(__i386__) || defined(__powerpc64__) ||
defined(__arm__) || defined(__aarch64__) || defined(__s390__) ||
defined(__s390x__)
assert_se(p == MAP_FAILED);
assert_se(errno == EPERM);
#else /* unknown architectures */
assert_se(p != MAP_FAILED);
assert_se(munmap(p, page_size()) >= 0);
#endif
p = mmap(NULL, page_size(), PROT_WRITE|PROT_READ,
MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
assert_se(p != MAP_FAILED);
assert_se(munmap(p, page_size()) >= 0);
_exit(EXIT_SUCCESS);
}
assert_se(wait_for_terminate_and_check("memoryseccomp-mmap",
pid, WAIT_LOG) == EXIT_SUCCESS);
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https://bugs.launchpad.net/bugs/1853852
Title:
hard to reproduce issues in systemd autopkgtest against new libseccomp
2.4.2
Status in libseccomp package in Ubuntu:
New
Status in systemd package in Ubuntu:
New
Bug description:
Hi,
I'm mostly reporting this if to one of the people watching systemd more
closely this is in any form a known issue or if there are any hints.
I recently merged libseccomp 2.4.2 and after a few initial cleanups that
worked well.
But on propsoed-migration I hit systemd test issues.
I have read about issues with arm NR_open defines - I had the same in
chrony - but that is fixed in libseccomp and that isn't failing in
systemd.
i386 and s390x (only those) have failing tests
- http://autopkgtest.ubuntu.com/packages/s/systemd/focal/s390x
- http://autopkgtest.ubuntu.com/packages/s/systemd/focal/i386
Example:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/s390x/s/systemd/20191120_105726_aea23@/log.gz
Failnig subtests are:
root-unittests FAIL non-zero exit status 134
upstream FAIL non-zero exit status 1
And looking at the details of root-unittest I found:
http://paste.ubuntu.com/p/N7q9PX3hFN/
====== test-seccomp =======
...
/* test_memory_deny_write_execute_mmap */
Operating on architecture: s390
Failed to add shmat() rule for architecture s390, skipping: Invalid argument
Operating on architecture: s390x
Failed to add shmat() rule for architecture s390x, skipping: Invalid argument
Assertion 'p == MAP_FAILED' failed at src/test/test-seccomp.c:493, function
test_memory_deny_write_execute_mmap(). Aborting.
memoryseccomp-mmap terminated by signal ABRT.
Assertion 'wait_for_terminate_and_check("memoryseccomp-mmap", pid, WAIT_LOG)
== EXIT_SUCCESS' failed at src/test/test-seccomp.c:507, function
test_memory_deny_write_execute_mmap(). Aborting.
FAIL: test-seccomp (code: 134)
But when installing source of systemd and the new libseccomp in a
Focal VM with proposed enabled it works just fine. Actually I just
found that it does have a good RC but breaks so maybe it is debuggable
after all.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1853852/+subscriptions
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