# gdb /usr/sbin/httpd CFPU-0-30732-5f05d35f-httpd-SEGV.core GNU gdb (GDB) 8.3.1 Copyright (C) 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "mips64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/sbin/httpd... (No debugging symbols found in /usr/sbin/httpd) [New LWP 30739] [New LWP 30753] [New LWP 30732] [New LWP 30746] [New LWP 30757] [New LWP 30755] [New LWP 30761] [New LWP 30750] [New LWP 30775] [New LWP 30741] [New LWP 30744] [New LWP 30737] [New LWP 30742] [New LWP 30748] [New LWP 30772] [New LWP 30776] [New LWP 30778] [New LWP 30770] [New LWP 30779] [New LWP 30774] [New LWP 30764] [New LWP 30766] [New LWP 30759] [New LWP 30768] [New LWP 30777] [New LWP 30780] [New LWP 30735] [New LWP 30752] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `/usr/bin/httpd -DFOREGROUND -f /tmp/QNHTTPD/conf/httpd.conf -k start'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __pthread_rwlock_wrlock_full (abstime=0x0, rwlock=0x0) at pthread_rwlock_common.c:576 576 pthread_rwlock_common.c: No such file or directory. [Current thread is 1 (Thread 0xfff31ba190 (LWP 30739))] (gdb) thread apply all bt full Thread 28 (Thread 0xffdb7fe190 (LWP 30752)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffdb7fd790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 22, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = --Type for more, q to quit, c to continue without paging-- g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 27 (Thread 0xfff41bc190 (LWP 30735)): #0 0x000000fff4cf34b8 in madvise () at ../sysdeps/unix/syscall-template.S:78 No locals. #1 0x000000fff4dc07ec in advise_stack_range (pd=1099312120208, guardsize=, size=, mem=0xfff39bc000) at allocatestack.c:386 sp = 1099312118112 pagesize_m1 = freesize = sp = pagesize_m1 = freesize = #2 start_thread (arg=0xfff41bc190) at pthread_create.c:552 pd = 0xfff41bc190 unwind_buf = {cancel_jmp_buf = {{jmp_buf = {{__pc = 1099324720476, __sp = 1099312118112, __regs = {1099312120208, 5079938720, 1099507141569, 1099507141568, 1099312122000, 1099303731200, 1099312122000, 1099312120208}, __fp = 1099312118112, __gp = 1099324907568, __glibc_reserved1 = 0, __fpregs = {0, 0, 0, 0, 0, 0, 0, 0}}}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = #3 0x000000fff4cf7da8 in __thread_start () at ../sysdeps/unix/sysv/linux/mips/clone.S:135 No locals. Thread 26 (Thread 0xffd2fed190 (LWP 30780)): #0 alloc_perturb (n=8192, p=0xffe0011c10 "") at malloc.c:1887 No locals. #1 _int_malloc (av=av@entry=0xffe0000020, bytes=bytes@entry=8192) at malloc.c:4104 p = 0xffe0011c10 iters = nb = idx = 108 bin = --Type for more, q to quit, c to continue without paging-- victim = 0xffe0011c00 size = victim_index = remainder = 0xffe0013c10 remainder_size = block = bit = map = fwd = bck = tcache_unsorted_count = 0 tcache_nb = 0 tc_idx = 511 return_cached = __PRETTY_FUNCTION__ = "_int_malloc" #2 0x000000fff4c86eac in __GI___libc_malloc (bytes=8192) at malloc.c:3065 ar_ptr = 0xffe0000020 victim = hook = tbytes = tc_idx = __PRETTY_FUNCTION__ = "__libc_malloc" #3 0x000000fff4e97fd4 in apr_pool_create_ex () from /usr/lib64/libapr-1.so.0 No symbol table info available. warning: GDB can't find the start of the function at 0x120085f9b. GDB is unable to find the start of the function at 0x120085f9b and thus can't determine the size of that function's stack frame. This means that GDB may be unable to access that stack frame, or the frames below it. This problem is most likely caused by an invalid program counter or stack pointer. However, if you think GDB should simply search farther back from 0x120085f9b for code which looks like the beginning of a function, you can increase the range of the search using the `set heuristic-fence-post' command. #4 0x0000000120085f9c in ?? () No symbol table info available. Thread 25 (Thread 0xffd47f0190 (LWP 30777)): --Type for more, q to quit, c to continue without paging-- #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd47ef790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 44, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = --Type for more, q to quit, c to continue without paging-- buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 24 (Thread 0xffd77f6190 (LWP 30768)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd77f5790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 32, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = --Type for more, q to quit, c to continue without paging-- maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 23 (Thread 0xffd97fa190 (LWP 30759)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 --Type for more, q to quit, c to continue without paging-- buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd97f9790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 24, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 22 (Thread 0xffd7ff7190 (LWP 30766)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = --Type for more, q to quit, c to continue without paging-- __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd7ff6790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 30, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 --Type for more, q to quit, c to continue without paging-- No symbol table info available. Backtrace stopped: frame did not save the PC Thread 21 (Thread 0xffd87f8190 (LWP 30764)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd87f7790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 28, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = --Type for more, q to quit, c to continue without paging-- private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 20 (Thread 0xffd5ff3190 (LWP 30774)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd5ff2790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 38, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 --Type for more, q to quit, c to continue without paging-- result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 19 (Thread 0xffd37ee190 (LWP 30779)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = --Type for more, q to quit, c to continue without paging-- __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd37ed790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 48, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 18 (Thread 0xffd6ff5190 (LWP 30770)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 --Type for more, q to quit, c to continue without paging-- oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd6ff4790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 34, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = --Type for more, q to quit, c to continue without paging-- s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 17 (Thread 0xffd3fef190 (LWP 30778)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 = __a1 = __a2 = __a3 = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x12ed4a568, cond=0x12ed4a5b8) at pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0xfff4dc88e8 <__condvar_cleanup_waiting>, __arg = 0xffd3fee790, __canceltype = 0, __prev = 0x0} cbuffer = {wseq = 46, cond = 0x12ed4a5b8, mutex = 0x12ed4a568, private = 0} err = g = flags = g1_start = signals = 0 result = 0 wseq = seq = private = maxspin = err = result = --Type for more, q to quit, c to continue without paging-- wseq = g = seq = flags = private = signals = g1_start = spin = buffer = cbuffer = rt = s = #2 __pthread_cond_wait (cond=0x12ed4a5b8, mutex=0x12ed4a568) at pthread_cond_wait.c:655 No locals. #3 0x000000fff4e95d20 in apr_thread_cond_wait () from /usr/lib64/libapr-1.so.0 No symbol table info available. Backtrace stopped: frame did not save the PC Thread 16 (Thread 0xffd4ff1190 (LWP 30776)): #0 0x000000fff4dc8b7c in futex_wait_cancelable (private=, expected=0, futex_word=0x12ed4a5e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 __err = 1 __ret = 512 oldtype = 0 err = oldtype = err = __err = __ret = _sys_result = __s0 = __v0 = __a0 =