[Bug 204426] Processes terminating cannot access memory
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Fri Feb 5 12:34:59 UTC 2016
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204426
--- Comment #27 from rblayzor at inoc.net ---
Just had one of the VM's sig11 on Dovecot last night... This one is giving me
the cannot access memory error ...
This GDB was configured as "amd64-marcel-freebsd"...
Core was generated by `dovecot'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/local/lib/dovecot/libdovecot.so.0...done.
Loaded symbols for /usr/local/lib/dovecot/libdovecot.so.0
Reading symbols from /lib/libc.so.7...Reading symbols from
/usr/lib/debug//lib/libc.so.7.debug...done.
done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /libexec/ld-elf.so.1...Reading symbols from
/usr/lib/debug//libexec/ld-elf.so.1.debug...done.
done.
Loaded symbols for /libexec/ld-elf.so.1
#0 memcpy () at bcopy.S:65
65 bcopy.S: No such file or directory.
in bcopy.S
(gdb) bt full
#0 memcpy () at bcopy.S:65
No locals.
#1 0x0000000800915484 in sig_handler (signo=20, si=0x7fffffffa9a0,
context=0x7fffffffa630)
at lib-signals.c:132
h = (struct signal_handler *) 0x8014198e0
saved_errno = 14
c = 0 '\0'
tmp_si = {si_signo = 0, si_errno = 0, si_code = 0, si_pid = 0, si_uid =
0, si_status = 0,
si_addr = 0x0, si_value = {sival_int = 0, sival_ptr = 0x0, sigval_int = 0,
sigval_ptr = 0x0},
_reason = {_fault = {_trapno = 0}, _timer = {_timerid = 0, _overrun = 0},
_mesgq = {_mqd = 0},
_poll = {_band = 0}, __spare__ = {__spare1__ = 0, __spare2__ =
0x7fffffffa5c8}}}
#2 <signal handler called>
No symbol table info available.
#3 0x0000000000411fc8 in _fini ()
No symbol table info available.
#4 0x000000080061c9a8 in objlist_call_fini ()
at /.amd_mnt/juno/pub/FreeBSD/10.2-RELEASE/libexec/rtld-elf/rtld.c:2359
list = (Objlist *) Cannot access memory at address 0x0
Current language: auto; currently asm
(gdb) x/i $rip
0x800cd1a76 <memcpy+22>: rep movsq %ds:(%rsi),%es:(%rdi)
(gdb) info registers
rax 0x800b893f0 34371834864
rbx 0x7fffffffaef8 140737488334584
rcx 0xa 10
rdx 0x50 80
rsi 0x7fffffffa9a0 140737488333216
rdi 0x800b893f0 34371834864
rbp 0x7fffffffa610 0x7fffffffa610
rsp 0x7fffffffa578 0x7fffffffa578
r8 0xffff800800b8ea50 -140703116498352
r9 0xfffff8000a811000 -8795916791808
r10 0x800636200 34366251520
r11 0x246 582
r12 0x800636200 34366251520
r13 0x800834830 34368342064
r14 0x7fffffffaef8 140737488334584
r15 0x0 0
rip 0x800cd1a76 0x800cd1a76 <memcpy+22>
eflags 0x10206 66054
cs 0x43 67
ss 0x3b 59
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
(gdb)
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