## kern.version (unpatched baseline kernel running during module build):
DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026

## patched net/zlib.c region (both checks):
4827:        z->msg = (char *)"invalid distance too far back";
5081:              z->msg = (char *)"invalid distance too far back";

===== zlib.ko build (from PATCHED net/zlib.c) =====
Warning: Object directory not changed from original /usr/src/sys/net/zlib
dragonfly -> /usr/src/sys/net/zlib/../..
machine_base -> /usr/src/sys/net/zlib/../../platform/pc64
machine -> /usr/src/sys/net/zlib/../../platform/pc64/include
cpu_base -> /usr/src/sys/net/zlib/../../cpu/x86_64
cpu -> /usr/src/sys/net/zlib/../../cpu/x86_64/include
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/alignbytes.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/asm.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/asm_mjgmacros.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/asmacros.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/atomic.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/bus_dma.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/cpu.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/cpufunc.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/cpumask.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/cputypes.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/db_machdep.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/elf.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/endian.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/exec.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/frame.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/ieeefp.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/int_const.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/int_limits.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/inttypes.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/limits.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/lwbuf.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/npx.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/param.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/pat.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/pmap.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/profile.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/psl.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/reg.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/reloc.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/segments.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/setjmp.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/sigframe.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/signal.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/specialreg.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/stdarg.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/stdint.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/sysarch.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/tls.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/trap.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/tss.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/types.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/ucontext.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/vframe.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/wchar.h
creating machine/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/machine/wchar_limits.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/aio.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/errno.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/fcntl.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/linker_set.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/poll.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/syslog.h
creating sys/ forwarding header /usr/src/sys/net/zlib/forwarder_x86_64/include/ucontext.h
cc  -O2 -pipe   -D_KERNEL -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Wcast-qual  -Wold-style-definition -Wmissing-include-dirs  -Wno-pointer-sign -Winit-self -Wundef -Wno-unused-but-set-variable -std=gnu11 -Werror -DKLD_MODULE -nostdinc  -I. -Idragonfly -I/usr/src/sys/net/zlib/forwarder_x86_64/include -Idragonfly/../include -I/usr/include  -Wold-style-declaration -fno-common -ffreestanding -fno-stack-protector -fno-strict-aliasing -fno-strict-overflow -fno-asynchronous-unwind-tables -fno-omit-frame-pointer -mcmodel=kernel -mno-red-zone -mno-mmx -mno-sse -msoft-float -mno-fp-ret-in-387 -mindirect-branch=thunk-inline   -c /usr/src/sys/net/zlib/../zlib.c
cc -Wl,--build-id=sha1 -nostdlib -Wl,--hash-style=sysv   -r -Wl,-d -o zlib.ko zlib.o

===== ng_deflate.ko build (only vulnerable caller) =====
Warning: Object directory not changed from original /usr/src/sys/netgraph7/deflate
dragonfly -> /usr/src/sys/netgraph7/deflate/../..
machine_base -> /usr/src/sys/netgraph7/deflate/../../platform/pc64
machine -> /usr/src/sys/netgraph7/deflate/../../platform/pc64/include
cpu_base -> /usr/src/sys/netgraph7/deflate/../../cpu/x86_64
cpu -> /usr/src/sys/netgraph7/deflate/../../cpu/x86_64/include
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/alignbytes.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/asm.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/asm_mjgmacros.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/asmacros.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/atomic.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/bus_dma.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/cpu.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/cpufunc.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/cpumask.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/cputypes.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/db_machdep.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/elf.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/endian.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/exec.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/frame.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/ieeefp.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/int_const.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/int_limits.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/inttypes.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/limits.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/lwbuf.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/npx.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/param.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/pat.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/pmap.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/profile.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/psl.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/reg.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/reloc.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/segments.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/setjmp.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/sigframe.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/signal.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/specialreg.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/stdarg.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/stdint.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/sysarch.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/tls.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/trap.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/tss.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/types.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/ucontext.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/vframe.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/wchar.h
creating machine/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/machine/wchar_limits.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/aio.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/errno.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/fcntl.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/linker_set.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/poll.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/syslog.h
creating sys/ forwarding header /usr/src/sys/netgraph7/deflate/forwarder_x86_64/include/ucontext.h
touch opt_netgraph.h
cc  -O2 -pipe   -D_KERNEL -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Wcast-qual  -Wold-style-definition -Wmissing-include-dirs  -Wno-pointer-sign -Winit-self -Wundef -Wno-unused-but-set-variable -std=gnu11 -Werror -DKLD_MODULE -nostdinc  -I. -Idragonfly -I/usr/src/sys/netgraph7/deflate/forwarder_x86_64/include -Idragonfly/../include -I/usr/include  -Wold-style-declaration -fno-common -ffreestanding -fno-stack-protector -fno-strict-aliasing -fno-strict-overflow -fno-asynchronous-unwind-tables -fno-omit-frame-pointer -mcmodel=kernel -mno-red-zone -mno-mmx -mno-sse -msoft-float -mno-fp-ret-in-387 -mindirect-branch=thunk-inline   -c ng_deflate.c
cc -Wl,--build-id=sha1 -nostdlib -Wl,--hash-style=sysv   -r -Wl,-d -o ng_deflate.ko ng_deflate.o

## artifacts:
-rw-r--r--  1 root  1000  44128 Jul  2 11:36 /usr/src/sys/net/zlib/zlib.ko
-rw-r--r--  1 root  1000  13720 Jul  2 11:36 /usr/src/sys/netgraph7/deflate/ng_deflate.ko

## confirm new error string is IN the compiled zlib.o:
invalid distance too far back