build failure after commit eb0481bbc4ce ("objtool: Fix reloc_hash size")

From: Michal Kubecek
Date: Wed Jun 28 2023 - 07:58:31 EST


Hello,

this morning, mainline kernel builds started to fail on my desktop like
this:

mike@lion:~/work/git/kernel-upstream> mkdir /srv/ram/kobj
mike@lion:~/work/git/kernel-upstream> make -j24 CC=gcc-13 O=/srv/ram/kobj defconfig >/dev/null
mike@lion:~/work/git/kernel-upstream> make -j24 CC=gcc-13 O=/srv/ram/kobj all >/dev/null
net/ipv4/netfilter/iptable_nat.o: warning: objtool: mmap fail reloc
net/netfilter/xt_mark.o: warning: objtool: mmap fail reloc
net/netfilter/xt_nat.o: warning: objtool: mmap fail reloc
net/netfilter/xt_LOG.o: warning: objtool: mmap fail reloc
net/netfilter/xt_MASQUERADE.o: warning: objtool: mmap fail reloc
net/netfilter/nf_log_syslog.o: warning: objtool: mmap fail reloc
net/netfilter/xt_addrtype.o: warning: objtool: mmap fail reloc
fs/efivarfs/efivarfs.o: warning: objtool: mmap fail reloc
drivers/thermal/intel/x86_pkg_temp_thermal.o: warning: objtool: mmap fail reloc
vmlinux.o: warning: objtool: mmap fail reloc
incomplete ORC unwind tables in file: vmlinux
Failed to sort kernel tables
make[2]: *** [/home/mike/work/git/kernel-upstream/scripts/Makefile.vmlinux:35: vmlinux] Error 1
make[2]: *** Deleting file 'vmlinux'
make[1]: *** [/home/mike/work/git/kernel-upstream/Makefile:1256: vmlinux] Error 2
make: *** [Makefile:226: __sub-make] Error 2

I bisected the failure to commit

eb0481bbc4ce ("objtool: Fix reloc_hash size")

I also tried gcc11 and building on a normal filesystem (rather than
tmpfs) but the result is still the same. Different configurations (e.g.
allmodconfig) only show more modules with "mmap fail reloc". The machine
has 64 GB of RAM and both ulimit -m and ulimit -v show "unlimited".
Anything idea what else I should try?

Michal Kubecek

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