[Bug 268033] x11/xscreensaver: Crashing and dumping core on unlock
- In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 268033] xscreenaver: crashing and dumping core on unlock"
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Tue, 13 Dec 2022 22:48:44 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268033 --- Comment #6 from Duncan Bayne <duncan@bayne.id.au> --- Okay, it seems to be going bang inside the PAM auth code. Having rebuilt with -faddress=sanitize in both CFLAGS and LDFLAGS: xscreensaver-auth: 09:46:59: pwnam: couldn't get password of "duncan" xscreensaver-auth: 09:46:59: running as user "duncan" xscreensaver-auth: 09:46:59: PAM: pam_start ("xscreensaver", "duncan", ...) ==> 0 (Success) xscreensaver-auth: 09:46:59: pam_set_item (p, PAM_TTY, ":0.0") ==> 0 (Success) xscreensaver-auth: 09:46:59: pam_authenticate (...) ... xscreensaver-auth: 09:46:59: pam_conversation (ECHO_OFF="Password:") ... xscreensaver-auth: 09:46:59: mouse is at 1669,594 on monitor 0 1920x1080+0+0 "eDP-1" xscreensaver-auth: 09:46:59: theme: default xscreensaver-auth: 09:47:00: kbd layout: English (US) xscreensaver-auth: 09:47:00: re-creating window: size changed xscreensaver-auth: 09:47:02: X11 KeyPress xscreensaver-auth: 09:47:02: X11 KeyPress ... redacted ... xscreensaver-auth: 09:47:04: X11 KeyPress xscreensaver-auth: 09:47:04: authentication input finished xscreensaver-auth: 09:47:04: pam_conversation (...) ==> PAM_SUCCESS xscreensaver-auth: 09:47:04: pam_authenticate (...) ==> 0 (Success) xscreensaver-auth: 09:47:04: pam_acct_mgmt (...) ==> 0 (Success) AddressSanitizer:DEADLYSIGNAL ================================================================= ==11906==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0008007e9e84 bp 0x7fffffffdf30 sp 0x7fffffffd6e8 T0) ==11906==The signal is caused by a READ memory access. ==11906==Hint: address points to the zero page. #0 0x8007e9e84 in strlen (/lib/libc.so.7+0x157e84) #1 0x8018f60c0 (/usr/lib/pam_exec.so.6+0x20c0) #2 0x8018f674f (/usr/lib/pam_exec.so.6+0x274f) #3 0x8005c3a21 in openpam_dispatch (/usr/lib/libpam.so.6+0x7a21) #4 0x8005c7e4b in pam_setcred (/usr/lib/libpam.so.6+0xbe4b) #5 0x31a138 in pam_try_unlock /usr/ports/x11/xscreensaver/work/xscreensaver-6.04/driver/passwd-pam.c:251:17 #6 0x3165eb in xscreensaver_auth /usr/ports/x11/xscreensaver/work/xscreensaver-6.04/driver/passwd.c:245:14 #7 0x2f78bf in main /usr/ports/x11/xscreensaver/work/xscreensaver-6.04/driver/xscreensaver-auth.c:325:12 #8 0x273dcf in _start /usr/src/lib/csu/amd64/crt1_c.c:75:7 #9 0x800357007 (<unknown module>) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV (/lib/libc.so.7+0x157e84) in strlen ==11906==ABORTING -- You are receiving this mail because: You are the assignee for the bug.