[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID:
<PH0PR05MB9775E2C2BF30E0F6C1B69AEB89BB2@PH0PR05MB9775.namprd05.prod.outlook.com>
Date: Tue, 22 Apr 2025 13:09:40 +0000
From: Bart Nys <bart.nys@...tiva.com>
To: "musl@...ts.openwall.com" <musl@...ts.openwall.com>
Subject: Program terminated in __pthread_exit by signal SIGSEGV when accessing
robust_list
Hi,
Our program is terminated by signal SIGSEGV when a detached thread is exiting.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 __pthread_exit (result=<optimized out>) at src/thread/pthread_create.c:103
103 int waiters = m->_m_waiters;
The robust_list head pointer is not valid:
(gdb) list
98 __vm_lock();
99 volatile void *volatile *rp;
100 while ((rp=self->robust_list.head) && rp != &self->robust_list.head) {
101 pthread_mutex_t *m = (void *)((char *)rp
102 - offsetof(pthread_mutex_t, _m_next));
103 int waiters = m->_m_waiters;
104 int priv = (m->_m_type & 128) ^ 128;
105 self->robust_list.pending = rp;
106 self->robust_list.head = *rp;
107 int cont = a_swap(&m->_m_lock, 0x40000000);
(gdb) p *self
$5 = {self = 0x7f7f947af8, dtv = 0x7f7f947bf0, prev = 0x7f7ff71af8, next = 0x7f8096aed8 <builtin_tls>, sysinfo = 0, canary = 3124346406391670196, canary2 = 0, tid = 18839, errno_val = 107,
detach_state = 2, cancel = 0, canceldisable = 1 '\001', cancelasync = 0 '\000', tsd_used = 0 '\000', dlerror_flag = 0 '\000', map_base = 0x7f7f925000 "", map_size = 143360,
stack = 0x7f7f947af8, stack_size = 133880, guard_size = 8192, result = 0x0, cancelbuf = 0x0, tsd = 0x7f7f947c00, robust_list = {head = 0x3c1, off = 0, pending = 0x0}, timer_id = 0,
locale = 0x7f809697c0 <__libc+56>, killlock = {-2147483647}, dlerror_buf = 0x0, stdio_locks = 0x0, canary_at_end = 0, dtv_copy = 0x7f7f947bf0}
We are using musl 1.1.24.
Our application has been running in the field for more than 10 years with glibc and never encountered this crash.
Any help that can point me in the right direction is greatly appreciated.
Bart.
Content of type "text/html" skipped
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
