[Bug 295333] linuxulator: page fault handling SO_PEERCRED

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295333

--- Comment #15 from [email protected] ---
A commit in branch stable/14 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=66c61a685c73aacf92aa0ecdadeff5f38332d669

commit 66c61a685c73aacf92aa0ecdadeff5f38332d669
Author:     Alan Somers <[email protected]>
AuthorDate: 2026-04-27 23:46:53 +0000
Commit:     Alan Somers <[email protected]>
CommitDate: 2026-08-05 02:23:12 +0000

    Fix LOCAL_PEERCRED in 32-bit compat mode

    Previously the cr_pid field would be incorrectly copied to userland, due
    to a size mismatch between the structure as defined in 32-bit vs 64-bit
    builds.  Fix it by converting the structure before copying it to
    userland.

    PR:             294833
    Sponsored by:   ConnectWise
    Reviewed by:    emaste
    Differential Revision: https://reviews.freebsd.org/D56675

    (cherry picked from commit 1d24638d3e8875e4b99a4b5e39f4241e37221b3d)

    linuxulator: fix SO_PEERCRED emulation after 1d24638d3e8

    For Linux binaries, sopt->sopt_td may be null.  And there's also no
    need to check it, since struct l_ucred has the same layout on 32-bit
    systems as on 64-bit ones.

    PR:             295333
    Reported by:    Miguel Gomes <[email protected]>
    Fixes:          1d24638d3e8 ("Fix LOCAL_PEERCRED in 32-bit compat mode")
    Reviewed by:    emaste
    Differential Revision: https://reviews.freebsd.org/D57032

    (cherry picked from commit 4cee16d471d47f4673e4d2c66f7a96d4e6d86ee9)

 sys/kern/uipc_usrreq.c | 23 +++++++++++++++++++++--
 sys/sys/ucred.h        | 11 +++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

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