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Re: sshd fork failure


On 10/13/2012 5:39 PM, Christopher Faylor wrote:
On Thu, Aug 30, 2012 at 06:44:39PM +0200, marco atzeri wrote:
Hi,
tracing the sshd process on latest cygwin shapshot ,
I see that the fork is failing due to exception C0000005

     1       1 [main] sshd (4644)
**********************************************
  5921    5922 [main] sshd (4644) Program name:
E:\cygwin\usr\sbin\sshd.exe (windows pid 4644)
    30    5952 [main] sshd (4644) OS version:   Windows NT-6.1
    25    5977 [main] sshd (4644)
**********************************************
   636    6613 [main] sshd (4644) sigprocmask: 0 = sigprocmask (0,
0x6123D428, 0x610FBB30)
   122    6735 [main] sshd 4644 child_copy: cygheap - hp 0x20C low
0x612708D0, high 0x61277640, res 1
  1368    8103 [main] sshd 4644 child_copy: done
--- Process 4644, exception C0000005 at 61137277



$ addr2line.exe 61137277 -e /usr/bin/cygwin1.dll
/netrel/src/cygwin-snapshot-20120827-1/newlib/libc/stdlib/mbtowc_r.c:323

that should be:

ch = (state->__count == 1) ? t[i++] : state->__value.__wchb[1];

inside __utf8_mbtowc .
It looks a strange place for a fork failure, but it is used in
winsup/cygwin/cygheap.cc so it could make sense.

Any suggestion how to follow/debug the child portion of fork ?

Is this still failing? We're looking to release 1.7.17 soon.


cgf


on 20121012 similar but in another location.


--- Process 6280, exception C0000005 at 61137DC8
427 147466 [main] sshd 6280 exception::handle: In cygwin_except_handler exception 0xC0000005 at 0x61137DC8 sp 0x289270
67 147533 [main] sshd 6280 exception::handle: In cygwin_except_handler signal 11 at 0x61137DC8
38 147571 [main] sshd 6280 exception::handle: In cygwin_except_handler calling 0x0
37 147608 [main] sshd 6280 exception::handle: Exception: STATUS_ACCESS_VIOLATION


 addr2line.exe 61137DC8 -e /usr/bin/cygwin1.dll
/netrel/src/cygwin-snapshot-20121012-1/newlib/libc/stdio/findfp.c:296


Marco



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