Date: Sun, 24 Apr 2016 16:30:54 +0200 From: Rustam <rustamabd@gmail.com> To: freebsd-security@freebsd.org Subject: Signal 11 dumps in telnetd (freebsd 10.3 release) Message-ID: <CAPzS6u9FCv3R_MnmEgP4Gdi8tfusRyaWebYeGxDG41R09dzjfA@mail.gmail.com>
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I got a couple of dozen dumps in /usr/libexec/telnetd (signal 11), and I'm wondering what those could be. FreeBSD 10.3-RELEASE, built from source. Dump stack trace: telrcv+333 ttloop+7C doit+1687 main+64D Dump is at address 0x0000000000404713: .text:0004046E2 loc_4046E2: .text:0004046E2 test byte ptr cs:diagnostic, 10h ; jumptable 0004046DB cases 11,12 .text:0004046E9 jz short loc_4046F7 .text:0004046EB mov edi, offset fmt ; "td: recv IAC" .text:0004046F0 mov esi, ebx ; option .text:0004046F2 call printoption .text:0004046F7 loc_4046F7: .text:0004046F7 call ptyflush .text:0004046FC call init_termbuf .text:000404701 cmp ebx, 0F7h .text:000404707 mov eax, 6199D8h .text:00040470C cmovz rax, r14 .text:000404710 mov rax, [rax] .text:000404713 mov al, [rax] ; <========== Signal 11 HERE .text:000404715 cmp al, 0FFh .text:000404717 jz loc_40495A ; jumptable 0004046DB default case .text:00040471D mov rcx, cs:pfrontp .text:000404724 lea rdx, [rcx+1] .text:000404728 mov cs:pfrontp, rdx .text:00040472F mov [rcx], al .text:000404731 mov cs:telrcv_state, 0 .text:00040473B jmp loc_4049A0 Regards, Rustam
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