https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109256
Bug ID: 109256
Summary: Error: failed to link 'linked_maps2.bpf.o': Cannot
allocate memory (12)
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: james.hilliard1 at gmail dot com
Target Milestone: ---
I'm seeing this gen object error which does not occur in llvm for a bpf
test(which uses both linked_maps1.c and linked_maps2.c) in bpf-next.
It seems this is triggering a double free in libbpf, not entirely clear if this
is a gcc issue or libbpf issue.
GCC gen object failure:
==2125110== Command:
/home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug
gen object
/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps.linked1.o
/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps1.bpf.o
/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o
==2125110==
libbpf: linker: adding object file
'/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps1.bpf.o'...
libbpf: linker: adding object file
'/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o'...
Error: failed to link
'/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o':
Cannot allocate memory (12)
==2125110== Invalid free() / delete / delete[] / realloc()
==2125110== at 0x484B0C4: free (vg_replace_malloc.c:884)
==2125110== by 0x17F8AB: bpf_linker__free (linker.c:204)
==2125110== by 0x12833C: do_object (gen.c:1608)
==2125110== by 0x12CDAB: cmd_select (main.c:206)
==2125110== by 0x129B53: do_gen (gen.c:2332)
==2125110== by 0x12CDAB: cmd_select (main.c:206)
==2125110== by 0x12DB9E: main (main.c:539)
==2125110== Address 0xda4b420 is 0 bytes after a block of size 0 free'd
==2125110== at 0x484B027: free (vg_replace_malloc.c:883)
==2125110== by 0x484D6F8: realloc (vg_replace_malloc.c:1451)
==2125110== by 0x181FA3: extend_sec (linker.c:1117)
==2125110== by 0x182326: linker_append_sec_data (linker.c:1201)
==2125110== by 0x1803DC: bpf_linker__add_file (linker.c:453)
==2125110== by 0x12829E: do_object (gen.c:1593)
==2125110== by 0x12CDAB: cmd_select (main.c:206)
==2125110== by 0x129B53: do_gen (gen.c:2332)
==2125110== by 0x12CDAB: cmd_select (main.c:206)
==2125110== by 0x12DB9E: main (main.c:539)
==2125110== Block was alloc'd at
==2125110== at 0x484876A: malloc (vg_replace_malloc.c:392)
==2125110== by 0x484D6EB: realloc (vg_replace_malloc.c:1451)
==2125110== by 0x181FA3: extend_sec (linker.c:1117)
==2125110== by 0x182326: linker_append_sec_data (linker.c:1201)
==2125110== by 0x1803DC: bpf_linker__add_file (linker.c:453)
==2125110== by 0x12829E: do_object (gen.c:1593)
==2125110== by 0x12CDAB: cmd_select (main.c:206)
==2125110== by 0x129B53: do_gen (gen.c:2332)
==2125110== by 0x12CDAB: cmd_select (main.c:206)
==2125110== by 0x12DB9E: main (main.c:539)
