[PROBLEM linux-next] make randconfig: kernel/kallsyms.c:492:17: error: ‘strcpy’ source argument is the same as destination [-Werror=restrict]

[Mirsad Todorovac]

Hi all,

On vanilla linux-next 20240627 tree, there appears to be something od with this KCONFIG_SEED=0x6C165C4C.

This construct should prevent the kernel/kallsyms.c:492:17: error: ‘strcpy’ source argument is the same as destination
error, so I am perplexed?

491         if (name != buffer)
492                 strcpy(buffer, name);



$ time nice make -j 36 bindeb-pkg |& tee ../err-6.10-rc5-next-20240627-02.log; date
  GEN     debian
dpkg-buildpackage --build=binary --no-pre-clean --unsigned-changes -R'make -f debian/rules' -j1 -a$(cat debian/arch)
dpkg-buildpackage: info: source package linux-upstream
dpkg-buildpackage: info: source version 6.10.0-rc5-3
dpkg-buildpackage: info: source distribution jammy
dpkg-buildpackage: info: source changed by marvin <marvin@defiant>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
 make -f debian/rules binary
#
# No change to .config
#
mkdir -p /home/marvin/linux/kernel/linux-next/tools/objtool && make O=/home/marvin/linux/kernel/linux-next subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    scripts/checksyscalls.sh
  UPD     init/utsversion-tmp.h
  CC      init/version.o
  AR      init/built-in.a
  CC      kernel/kallsyms.o
  CC      kernel/kallsyms_selftest.o
  CC      kernel/vmcore_info.o
  CC      kernel/elfcorehdr.o
  CC      kernel/crash_reserve.o
  CC      kernel/kexec_core.o
  CC      kernel/crash_core.o
  CC      kernel/kexec_file.o
  UPD     kernel/config_data
  CC      kernel/kprobes.o
  CC      kernel/hung_task.o
  CC      kernel/seccomp.o
  CC      kernel/tracepoint.o
  CC      kernel/irq_work.o
  CC      kernel/static_call.o
  CC      kernel/static_call_inline.o
  CC      kernel/context_tracking.o
  CC      kernel/torture.o
  CC      kernel/iomem.o
  CC      kernel/rseq.o
  CC      kernel/watch_queue.o
  GZIP    kernel/config_data.gz
  CC      kernel/configs.o
kernel/kallsyms.c: In function ‘__sprint_symbol.constprop’:
kernel/kallsyms.c:492:17: error: ‘strcpy’ source argument is the same as destination [-Werror=restrict]
  492 |                 strcpy(buffer, name);
      |                 ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[6]: *** [scripts/Makefile.build:244: kernel/kallsyms.o] Error 1
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [scripts/Makefile.build:485: kernel] Error 2
make[4]: *** [Makefile:1934: .] Error 2
make[3]: *** [debian/rules:74: build-arch] Error 2
dpkg-buildpackage: error: make -f debian/rules binary subprocess returned exit status 2
make[2]: *** [scripts/Makefile.package:121: bindeb-pkg] Error 2
make[1]: *** [/home/marvin/linux/kernel/linux-next/Makefile:1555: bindeb-pkg] Error 2
make: *** [Makefile:240: __sub-make] Error 2

real	0m2.962s
user	0m12.970s
sys	0m5.293s
Thu Jun 27 20:42:38 CEST 2024
$ 

Hope this helps.

Best regards,
Mirsad Todorovac