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From: "sam at gentoo dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug nss/28752] Segfault in getpwuid when stat fails
Date: Thu, 09 Jun 2022 05:35:22 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28752

--- Comment #4 from Sam James <sam at gentoo dot org> ---
(In reply to Sam James from comment #3)
> Fixed in master with 3fdf0a205b622e40fa7e3c4ed1e4ed4d5c6c5380 and
> ace9e3edbca62d978b1e8f392d8a5d78500272d9.
>

Sorry, thought it'd linkify:

commit ace9e3edbca62d978b1e8f392d8a5d78500272d9 (origin/master, origin/HEAD,
master)
Author: Sam James <sam@gentoo.org>
Date:   Sun Jun 5 04:57:10 2022 +0100

    nss: handle stat failure in check_reload_and_get (BZ #28752)

    Skip the chroot test if the database isn't loaded
    correctly (because the chroot test uses some
    existing DB state).

    The __stat64_time64 -> fstatat call can fail if
    running under an (aggressive) seccomp filter,
    like Firefox seems to use.

    This manifested in a crash when using glib built
    with FAM support with such a Firefox build.

    Suggested-by: DJ Delorie <dj@redhat.com>
    Signed-off-by: Sam James <sam@gentoo.org>
    Reviewed-by: DJ Delorie <dj@redhat.com>

commit 3fdf0a205b622e40fa7e3c4ed1e4ed4d5c6c5380
Author: Sam James <sam@gentoo.org>
Date:   Sun Jun 5 04:57:09 2022 +0100

    nss: add assert to DB_LOOKUP_FCT (BZ #28752)

    It's interesting if we have a null action list,
    so an assert is worthwhile.

    Suggested-by: DJ Delorie <dj@redhat.com>
    Signed-off-by: Sam James <sam@gentoo.org>
    Reviewed-by: DJ Delorie <dj@redhat.com>

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