Suspicious fetch-pack behaviour

Hi,

One of my users reported a strange problem: a simple HTTPS clone did not work with Git 1.8.3.1 on RedHat 7. I did many tests and I was not able to understand why his clone don't work while I'm able to do it on other similar host.

Nevertheless, we did more investigations. One of them: a raw strace.
I discovered two strange behaviours:
- fetch-pack closes its standard input and standard output and then
tries to print the references on standard input and finaly dies.
- git-remote-https does not react to fetch-pack death and continue
polling an empty set of FD.

Reading fetch-pack code, the behaviour is explicit: When "--stateless-rpc" is provided, fd is filled with standard input and standard ouput which are then closed. https://git.kernel.org/pub/scm/git/git.git/tree/builtin/fetch-pack.c?h=v1.8.3.1#n156

Reading this, I did not understand why it could work. Any help appreciated.

Here is the strace's extract:

2801 getdents(3, /* 2 entries */, 32768) = 48 2801 getdents(3, /* 0 entries */, 32768) = 0 2801 close(3) = 0 2801 close(0) = 0 2801 close(1) = 0 2801 fstat(1, 0x7ffe10ab4730) = -1 EBADF (Bad file descriptor) 2801 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f220c9e3000 2801 fstat(1, 0x7ffe10ab5040) = -1 EBADF (Bad file descriptor) 2801 write(1, "4df1dbf3224064cc5dd2e4c095da2dda"..., 159) = -1 EBADF (Bad file descriptor) 2801 exit_group(0) = ? 2801 +++ exited with 0 +++ 2769 <... poll resumed> ) = ? ERESTART_RESTARTBLOCK (Interrupted by signal) 2769 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2801, si_uid=7561, si_status=0, si_utime=0, si_stime=0} --- 2769 restart_syscall(<... resuming interrupted poll ...>) = 0 2769 poll(NULL, 0, 1000) = 0 (Timeout) 2769 poll(NULL, 0, 1000) = 0 (Timeout) 2769 poll(NULL, 0, 1000) = 0 (Timeout) 2769 poll(NULL, 0, 1000) = 0 (Timeout) 2769 poll(NULL, 0, 1000) = 0 (Timeout) 2769 poll(NULL, 0, 1000) = 0 (Timeout)