Mailing List Archive: [Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4

[Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4

bugzilla-daemon at mindrot

Oct 30, 2023, 7:36 AM

Post #1 of 6 (198 views)

https://bugzilla.mindrot.org/show_bug.cgi?id=3630

Simon Howard <fraggle+mindrot@gmail.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |fraggle+mindrot@gmail.com

--- Comment #1 from Simon Howard <fraggle+mindrot@gmail.com> ---
Created attachment 3748
--> https://bugzilla.mindrot.org/attachment.cgi?id=3748&action=edit
Attempt at getting a backtrace

Attempt at getting a backtrace with gdb. I tried to get some additional
info about registers etc. instead.

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[Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4 [ In reply to ]

bugzilla-daemon at mindrot

Oct 30, 2023, 7:39 AM

Post #2 of 6 (198 views)

https://bugzilla.mindrot.org/show_bug.cgi?id=3630

--- Comment #2 from Simon Howard <fraggle+mindrot@gmail.com> ---
Core file doesn't appear to have attached to the bug; it occurs to me
that that may be intentional. If you want a copy please let me know.

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[Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4 [ In reply to ]

bugzilla-daemon at mindrot

Oct 30, 2023, 3:15 PM

Post #3 of 6 (198 views)

https://bugzilla.mindrot.org/show_bug.cgi?id=3630

Damien Miller <djm@mindrot.org> changed:

What |Removed |Added
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CC| |djm@mindrot.org

--- Comment #3 from Damien Miller <djm@mindrot.org> ---
Can you try gdb from ports ("egdb"). It often works better than the one
in base

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[Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4 [ In reply to ]

bugzilla-daemon at mindrot

Oct 31, 2023, 8:13 AM

Post #4 of 6 (198 views)

https://bugzilla.mindrot.org/show_bug.cgi?id=3630

--- Comment #4 from Simon Howard <fraggle+mindrot@gmail.com> ---
Created attachment 3749
--> https://bugzilla.mindrot.org/attachment.cgi?id=3749&action=edit
Backtrace

Success!

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[Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4 [ In reply to ]

bugzilla-daemon at mindrot

Oct 31, 2023, 11:36 AM

Post #5 of 6 (198 views)

https://bugzilla.mindrot.org/show_bug.cgi?id=3630

--- Comment #5 from Damien Miller <djm@mindrot.org> ---
Looks like a crash inside malloc(). Could you try running with
MALLOC_OPTIONS=SGFCJ? You might also want to report this to
bugs@openbsd.org because I'm fairly sure the problem is not in sshd
(mac_alg_list() is a very simple function).

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[Bug 3630] sshd crash on OpenSSH 9.5 / OpenBSD 7.4 [ In reply to ]

bugzilla-daemon at mindrot

Nov 3, 2023, 9:23 AM

Post #6 of 6 (191 views)

https://bugzilla.mindrot.org/show_bug.cgi?id=3630

--- Comment #6 from Simon Howard <fraggle+mindrot@gmail.com> ---
Thanks for suggestion. I've opened my sshd back up to the Internet and
it's running with the requested malloc options.

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