Everything we need is already upstream. I think the changes were:

    commit 0690dc39644d15fc89813419ffcdf9754b098260
    Author: Mark Wielaard <mark@klomp.org>
    Date:   Sun Sep 22 23:24:34 2024 +0200
    
        Implement /proc/self/exe readlink[at] fallback in POST handler
        
        Calling the readlink[at] syscall directly from the PRE handler defeats
        the FUSE_COMPATIBLE_MAY_BLOCK (SfMayBlock) flag. Add a POST handler
        that only explicitly calls the readlink[at] handler for the
        /proc/self/exe fallback (this should be fine unless /proc is also
        implemented as fuse in this process).
        
        Adjust readlink[at] GENX_ and LINX_ syswrap macros to GENXY and LINXY.
        
        https://bugs.kde.org/show_bug.cgi?id=493507
    
    commit ddf397c024c80382f7a2f3a0d46d58fb839eef96
    Author: Mark Wielaard <mark@klomp.org>
    Date:   Sat Sep 21 22:27:24 2024 +0200
    
        Add missing FUSE_COMPATIBLE_MAY_BLOCKs
        
        Various syscalls (in particular "at" variants) PRE handlers were
        missing a FUSE_COMPATIBLE_MAY_BLOCK statement.
        
        Add it to the generic PRE handlers of access and statfs64. And the
        linux PRE handlers of mknodat, fchownat, futimesat, utimensat,
        utimensat_time64, renameat, renameat2, readlinkat, fchmodat,
        fchmodat2, faccessat and faccessat2.
        
        https://bugs.kde.org/show_bug.cgi?id=493454