https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279268
Bug ID: 279268
Summary: [patch] xdm dies when pressing CTRL-C if pam_xdg.so is
used
Product: Base System
Version: 14.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Created attachment 250918
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=250918&action=edit
patch
After updating to latest 14.1 BETA xdm crashed when Ctrl-C was pressed on the
logon screen. Running xdm in debug mode showed:
SetPrompt(0, <NULL>, LOGIN_PROMPT_NOT_SHOWN(0))
SetPrompt(1, <NULL>, LOGIN_PROMPT_NOT_SHOWN(0))
pam_msg: PAM_PROMPT_ECHO_ON (2): ' Login:'
SetPrompt(0, Login:, LOGIN_PROMPT_ECHO_ON(1))
RedrawFail('Login incorrect or forbidden by policy', 0)
dispatching :0
RedrawFail('Login incorrect or forbidden by policy', 0)
(CTRL-C now)
GreetDone: , (password is 0 long)
REMANAGE_DISPLAY
Done dispatch :0
xdm error (pid 8751): pam_authenticate failure: Conversation failure
Unsecure display :0
Greet connection closed
Manager wait returns pid: 8751 sig 11 core 0 code 0
Display exited with unknown status 2816
I fixed it with the attached patch (not knowing if this is correct :-)).
Apparently pam_get_item() can return NULL in &user but pam_xdg.c continues with
it...
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