stdlib/tst-arc4random-thread
Tests what?
Test is verifying that arc4random behaves as expected in the presence of multiple threads.
Fails where?
- Release/2.41
- x86_64
- Fedora 41
info: outer_threads=2 inner_threads=4 info: arc4random: minimum of 163840 blob results expected info: arc4random: 163894 blob results observed error: arc4random: duplicate blob: "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" (16 bytes) first source: thread -1, index 0 second source: thread -1, index 1 info: arc4random_buf: minimum of 163840 blob results expected info: arc4random_buf: 163840 blob results observed info: arc4random_uniform: minimum of 163840 blob results expected info: arc4random_uniform: 163840 blob results observed error: 1 test failures
Fails where?
- Release/2.39
- MIPS64 (N64)
- Binutils 2.41.90.20240115, GCC 13.2.0, Linux 6.8.0-rc1+
info: outer_threads=1 inner_threads=4 info: arc4random: minimum of 81920 blob results expected Fatal glibc error: cannot get entropy for arc4random Aborted (core dumped)
With GDB:
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
info: outer_threads=1 inner_threads=4
info: arc4random: minimum of 81920 blob results expected
[New Thread 0xfff7d5f180 (LWP 710)]
[Detaching after fork from child process 711]
[New Thread 0xfff755b180 (LWP 714)]
[New Thread 0xfff6d57180 (LWP 715)]
[Detaching after fork from child process 716]
[New Thread 0xfff6553180 (LWP 719)]
[Detaching after fork from child process 720]
[New Thread 0xfff5d4f180 (LWP 721)]
Fatal glibc error: cannot get entropy for arc4random
[Detaching after fork from child process 724]
[New Thread 0xfff554b180 (LWP 727)]
[Thread 0xfff6d57180 (LWP 715) exited]
Thread 5 "tst-arc4random-" received signal SIGABRT, Aborted.
[Switching to Thread 0xfff6553180 (LWP 719)]
0x000000fff7e2bda8 in __pthread_kill_implementation (no_tid=0, signo=6,
threadid=<optimized out>) at pthread_kill.c:43
43 int ret = INTERNAL_SYSCALL_CALL (tgkill, __getpid (), tid, signo);
(gdb) bt
#0 0x000000fff7e2bda8 in __pthread_kill_implementation (no_tid=0, signo=6,
threadid=<optimized out>) at pthread_kill.c:43
#1 __pthread_kill_internal (signo=6, threadid=<optimized out>)
at pthread_kill.c:78
#2 __GI___pthread_kill (threadid=<optimized out>, signo=6)
at pthread_kill.c:89
#3 0x000000fff7dce7b8 in __GI_raise (sig=6) at ../sysdeps/posix/raise.c:26
#4 0x000000fff7db0058 in __GI_abort () at abort.c:79
#5 0x000000fff7e1a398 in __libc_message_impl (fmt=<optimized out>)
at ../sysdeps/posix/libc_fatal.c:132
#6 0x000000fff7e1a3c4 in __GI___libc_fatal (message=<optimized out>)
at ../sysdeps/posix/libc_fatal.c:141
#7 0x000000fff7dd00e8 in arc4random_getrandom_failure () at arc4random.c:30
#8 0x000000fff7dd01c0 in __GI___arc4random_buf (p=p@entry=0xfff6552764,
n=n@entry=4) at arc4random.c:56
#9 0x000000fff7dd0460 in __GI___arc4random_buf (n=4, p=0xfff6552764)
at arc4random.c:40
#10 __GI___arc4random () at arc4random.c:98
#11 0x000000aaaaaa29c4 in generate_arc4random (
bytes=0xffd80139a4 "3<\252\243", size=15) at tst-arc4random-thread.c:69
#12 0x000000aaaaaa2f04 in inner_thread (
closure=0xaaaaaa2958 <generate_arc4random>) at tst-arc4random-thread.c:160
#13 0x000000fff7e29760 in start_thread (arg=0x800000) at pthread_create.c:447
#14 0x000000fff7ebdac4 in __thread_start_clone3 ()
at ../sysdeps/unix/sysv/linux/mips/clone3.S:131TEMP_FAILURE_RETRY (__getrandom_nocancel (p, n, 0)) returns -EFAULT.
Confirmed as a kernel issue.