Bug#951412: proftpd-basic: segfault when logging in through sftp

[Bernhard Übelacker]

Dear Maintainer,
I just tried to reconstruct the line informations from a
running process with an attached gdb and installed dbgsym package.

    0x7f373b3ad458 in __memset_sse2_unaligned at ../sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S:120
    0x55d7e2f68a64 in pcalloc at pool.c:620
    0x55d7e2f8c778 in pr_response_add at response.c:281
    0x7f373ab45822 in handle_userauth_req at auth.c:1502
    0x7f373ab2de69 in sftp_ssh2_packet_handle at packet.c:1608
    0x7f373ab29f12 in sftp_cmd_loop at mod_sftp.c:302
    0x55d7e2f65222 in fork_server at main.c:1481
    0x55d7e2f65acd in daemon_loop at main.c:1718
    0x55d7e2f639bf in standalone_main at main.c:1903
    0x7f373b32f09b in __libc_start_main () at ../csu/libc-start.c:308
    0x55d7e2f63fca in _start () at main.c:2332

https://sources.debian.org/src/proftpd-dfsg/1.3.6-4+deb10u3/src/pool.c/#L620
https://sources.debian.org/src/proftpd-dfsg/1.3.6-4+deb10u3/src/response.c/#L281

Could the call to palloc just before have failed to allocate memory?

Kind regards,
Bernhard