Using -Oline -j 72 W=1 redirect to /tmp/tmp.NWO4m2a8HA and /tmp/tmp.Sck38i7uax
CC=ccache gcc
gcc (GCC) 15.2.1 20250808 (Red Hat 15.2.1-1)
Tree base:
23f3770e1a53 ("bpf: Fix metadata_dst leak __bpf_redirect_neigh_v{4,6}")
Baseline building the tree
make[1]: Entering directory '/home/nipa/bpf/wt-0/build_32bit'
  GEN     Makefile
  HOSTCC  scripts/basic/fixdep
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/bpf/wt-0/build_32bit'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
  HOSTCC  scripts/basic/fixdep
  CALL    ../scripts/checksyscalls.sh
  CC      kernel/bpf/inode.o
  AR      kernel/bpf/built-in.a
  AR      kernel/built-in.a
  CC      net/xdp/xsk_queue.o
  CC [M]  net/xdp/xsk_diag.o
  CC      net/xdp/xdp_umem.o
  CC      net/xdp/xsk_buff_pool.o
  CC      net/xdp/xsk.o
  AR      net/xdp/built-in.a
  AR      net/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  KSYMS   .tmp_vmlinux0.kallsyms.S
  AS      .tmp_vmlinux0.kallsyms.o
  LD      .tmp_vmlinux1
  CC [M]  net/xdp/xsk_diag.mod.o
  LD [M]  net/xdp/xsk_diag.ko
  NM      .tmp_vmlinux1.syms
  KSYMS   .tmp_vmlinux1.kallsyms.S
  AS      .tmp_vmlinux1.kallsyms.o
  LD      .tmp_vmlinux2
  NM      .tmp_vmlinux2.syms
  KSYMS   .tmp_vmlinux2.kallsyms.S
  AS      .tmp_vmlinux2.kallsyms.o
  LD      vmlinux.unstripped
  NM      System.map
  SORTTAB vmlinux.unstripped
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     modules.builtin.ranges
  OBJCOPY vmlinux
  CC      arch/x86/boot/version.o
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  VOFFSET arch/x86/boot/compressed/../voffset.h
  CC      arch/x86/boot/compressed/misc.o
  CC      arch/x86/boot/compressed/kaslr.o
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  OBJCOPY arch/x86/boot/vmlinux.bin
  AS      arch/x86/boot/header.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#257)
Building the tree before the patch
make[1]: Entering directory '/home/nipa/bpf/wt-0/build_32bit'
  GEN     Makefile
  HOSTCC  scripts/basic/fixdep
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/bpf/wt-0/build_32bit'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
  HOSTCC  scripts/basic/fixdep
  CALL    ../scripts/checksyscalls.sh
  CC      net/xdp/xsk.o
  CC      net/xdp/xdp_umem.o
  CC      net/xdp/xsk_queue.o
  CC      net/xdp/xsk_buff_pool.o
  CC [M]  net/xdp/xsk_diag.o
  AR      net/xdp/built-in.a
  AR      net/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  KSYMS   .tmp_vmlinux0.kallsyms.S
  AS      .tmp_vmlinux0.kallsyms.o
  LD      .tmp_vmlinux1
  CC [M]  net/xdp/xsk_diag.mod.o
  LD [M]  net/xdp/xsk_diag.ko
  NM      .tmp_vmlinux1.syms
  KSYMS   .tmp_vmlinux1.kallsyms.S
  AS      .tmp_vmlinux1.kallsyms.o
  LD      .tmp_vmlinux2
  NM      .tmp_vmlinux2.syms
  KSYMS   .tmp_vmlinux2.kallsyms.S
  AS      .tmp_vmlinux2.kallsyms.o
  LD      vmlinux.unstripped
  NM      System.map
  SORTTAB vmlinux.unstripped
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     modules.builtin.ranges
  OBJCOPY vmlinux
  CC      arch/x86/boot/version.o
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  VOFFSET arch/x86/boot/compressed/../voffset.h
  CC      arch/x86/boot/compressed/misc.o
  CC      arch/x86/boot/compressed/kaslr.o
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  OBJCOPY arch/x86/boot/vmlinux.bin
  AS      arch/x86/boot/header.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#258)
Building the tree with the patch
make[1]: Entering directory '/home/nipa/bpf/wt-0/build_32bit'
  GEN     Makefile
  HOSTCC  scripts/basic/fixdep
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/bpf/wt-0/build_32bit'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
  HOSTCC  scripts/basic/fixdep
  CALL    ../scripts/checksyscalls.sh
  CC      net/xdp/xsk.o
  CC      net/xdp/xdp_umem.o
  CC      net/xdp/xsk_queue.o
  CC      net/xdp/xsk_buff_pool.o
  CC [M]  net/xdp/xsk_diag.o
  AR      net/xdp/built-in.a
  AR      net/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  KSYMS   .tmp_vmlinux0.kallsyms.S
  AS      .tmp_vmlinux0.kallsyms.o
  LD      .tmp_vmlinux1
  CC [M]  net/xdp/xsk_diag.mod.o
  LD [M]  net/xdp/xsk_diag.ko
  NM      .tmp_vmlinux1.syms
  KSYMS   .tmp_vmlinux1.kallsyms.S
  AS      .tmp_vmlinux1.kallsyms.o
  LD      .tmp_vmlinux2
  NM      .tmp_vmlinux2.syms
  KSYMS   .tmp_vmlinux2.kallsyms.S
  AS      .tmp_vmlinux2.kallsyms.o
  LD      vmlinux.unstripped
  NM      System.map
  SORTTAB vmlinux.unstripped
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     modules.builtin.ranges
  OBJCOPY vmlinux
  CC      arch/x86/boot/version.o
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  VOFFSET arch/x86/boot/compressed/../voffset.h
  CC      arch/x86/boot/compressed/misc.o
  CC      arch/x86/boot/compressed/kaslr.o
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  OBJCOPY arch/x86/boot/vmlinux.bin
  AS      arch/x86/boot/header.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#259)