[Bug 204426] Processes terminating cannot access memory

[email protected]
Newsgroups gmane.os.freebsd.devel.threading
Message-ID <[email protected]/bugzilla/>
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204426

--- Comment #96 from Robert Blayzor <[email protected]> ---
Similar sigfault today... 


844 vm_fault OBJ_DEAD 0xfffff8000cf704c8
pid 844 kpf 2
pid 844 comm exim: signal 11 err 7 code 2 type 12 addr 0x803006434 rsp
0x7fffffffc7b0 rip 0x801201a67 <ff 48 34 74 02 5d c3 48>
844 vm_fault OBJ_DEAD 0xfffff8000cf704c8
pid 844 kpf 2
Failed to write core file for process exim (error 14)
pid 844 (exim), uid 26: exited on signal 11



(gdb) bt full
#0  _thr_signal_unblock (curthread=0x803006400)
    at /.amd_mnt/juno/pub/FreeBSD/10-STABLE/lib/libthr/thread/thr_sig.c:107
No locals.
Cannot access memory at address 0x7fffffffc7b8
Current language:  auto; currently minimal



procstat -v exim.core
  PID              START                END PRT  RES PRES REF SHD   FL TP PATH
  844           0x400000           0x560000 r-x  316  327   3   1 CN-- vn
/usr/local/sbin/exim
  844           0x760000           0x76a000 rw-   10    0   2   1 CN-- vn
/usr/local/sbin/exim
  844           0x76a000           0x779000 rw-    5    5   2   1 CN-- df
  844        0x800760000        0x80077e000 r-x   30   30  34   0 CN-- vn
/libexec/ld-elf.so.1
  844        0x80077e000        0x800785000 rw-    7    7   2   0 CN-- df
  844        0x800787000        0x8007b7000 rw-   40   40   2   1 CN-- df
  844        0x80097d000        0x80097f000 rw-    2    2   2   0 CN-- df
  844        0x80097f000        0x80098d000 r-x   14   15  14   4 CN-- vn
/lib/libcrypt.so.5
  844        0x80098d000        0x800b8d000 ---    0    0   2   0 CN-- df
  844        0x800b8d000        0x800b8e000 rw-    1    0   2   0 CN-- vn
/lib/libcrypt.so.5
  844        0x800b8e000        0x800b9f000 rw-    0    0   0   0 ---- --
  844        0x800b9f000        0x800bc8000 r-x   41   41  19   6 CN-- vn
/lib/libm.so.5
  844        0x800bc8000        0x800dc7000 ---    0    0   2   0 CN-- df
  844        0x800dc7000        0x800dc8000 rw-    1    0   2   0 CN-- vn
/lib/libm.so.5
  844        0x800dc8000        0x800dd8000 r-x   16   17  26  10 CN-- vn
/lib/libutil.so.9
  844        0x800dd8000        0x800fd8000 ---    0    0   2   0 CN-- df
  844        0x800fd8000        0x800fd9000 rw-    1    0   2   0 CN-- vn
/lib/libutil.so.9
  844        0x800fd9000        0x800fdb000 rw-    0    0   0   0 ---- --
  844        0x800fdb000        0x800ff3000 r-x   24   26   3   1 CN-- vn
/usr/local/lib/libspf2.so.2.1.0
  844        0x800ff3000        0x8011f3000 ---    0    0   2   0 CN-- df
  844        0x8011f3000        0x8011f5000 rw-    2    0   2   1 CN-- vn
/usr/local/lib/libspf2.so.2.1.0
  844        0x8011f5000        0x80120d000 r-x   24   25  28  10 CN-- vn
/lib/libthr.so.3
  844        0x80120d000        0x80140d000 ---    0    0   2   0 CN-- df
  844        0x80140d000        0x80140e000 rw-    1    0   2   1 CN-- vn
/lib/libthr.so.3
  844        0x80140e000        0x80141a000 rw-   12    0   1   0 C--- df
  844        0x80141a000        0x801445000 r-x   38   41   5   2 CN-- vn
/usr/local/lib/libpq.so.5
  844        0x801445000        0x801645000 ---    0    0   2   0 CN-- df
  844        0x801645000        0x801648000 rw-    3    0   2   0 CN-- vn
/usr/local/lib/libpq.so.5
  844        0x801648000        0x80181d000 r-x  424  432  10   2 CN-- vn
/usr/local/lib/perl5/5.22/mach/CORE/libperl.so.5.22.1
  844        0x80181d000        0x801a1c000 ---    0    0   2   0 CN-- df
  844        0x801a1c000        0x801a25000 rw-    9    0   2   0 CN-- vn
/usr/local/lib/perl5/5.22/mach/CORE/libperl.so.5.22.1
  844        0x801a25000        0x801a88000 r-x   86   96  11   5 CN-- vn
/usr/lib/libssl.so.7
  844        0x801a88000        0x801c88000 ---    0    0   2   0 CN-- df
  844        0x801c88000        0x801c92000 rw-   10    0   2   0 CN-- vn
/usr/lib/libssl.so.7
  844        0x801c92000        0x801e5f000 r-x  461  501  15   7 CN-- vn
/lib/libcrypto.so.7
  844        0x801e5f000        0x80205f000 ---    0    0   2   0 CN-- df
  844        0x80205f000        0x802087000 rw-   40    0   2   0 CN-- vn
/lib/libcrypto.so.7
  844        0x802087000        0x802089000 rw-    1    1   2   0 CN-- df
  844        0x802089000        0x8020fe000 r-x   45   45   8   3 CN-- vn
/usr/local/lib/libpcre.so.1.2.5
  844        0x8020fe000        0x8022fd000 ---    0    0   2   0 CN-- df
  844        0x8022fd000        0x8022fe000 rw-    1    0   2   0 CN-- vn
/usr/local/lib/libpcre.so.1.2.5
  844        0x8022fe000        0x802476000 r-x  376  387  60  26 CN-- vn
/lib/libc.so.7
  844        0x802476000        0x802675000 ---    0    0   2   0 CN-- df
  844        0x802675000        0x802681000 rw-   12    0   2   1 CN-- vn
/lib/libc.so.7
  844        0x802681000        0x8026ab000 rw-   12   12   2   1 CN-- df
  844        0x8026ab000        0x8026b5000 r-x   10   11  10   4 CN-- vn
/usr/local/lib/libintl.so.8.1.4
  844        0x8026b5000        0x8028b5000 ---    0    0   2   0 CN-- df
  844        0x8028b5000        0x8028b6000 rw-    1    0   2   0 CN-- vn
/usr/local/lib/libintl.so.8.1.4
  844        0x802c00000        0x803400000 rw-  191    0   1   0 C--- df
  844     0x7fffdfffe000     0x7fffdffff000 ---    0    0   0   0 ---- --
  844     0x7ffffffdf000     0x7ffffffff000 rw-   10    0   1   0 C--D df
  844     0x7ffffffff000     0x800000000000 r-x    1    1  36   0 ---- ph

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