linux-kernel - Re: build failure after commit eb0481bbc4ce ("objtool: Fix reloc

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Message-ID: <fb93d107-c834-1849-2b14-1dd33c4f9955@leemhuis.info>
Date:   Sat, 8 Jul 2023 15:40:50 +0200
From:   "Linux regression tracking (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     Michal Kubecek <mkubecek@...e.cz>,
        Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org
Subject: Re: build failure after commit eb0481bbc4ce ("objtool: Fix reloc_hash
 size")

On 28.06.23 13:58, Michal Kubecek wrote:
> 
> this morning, mainline kernel builds started to fail on my desktop like
> this:
> 
>   mike@...n:~/work/git/kernel-upstream> mkdir /srv/ram/kobj
>   mike@...n:~/work/git/kernel-upstream> make -j24 CC=gcc-13 O=/srv/ram/kobj defconfig >/dev/null
>   mike@...n:~/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, thx for the report. Please correct me if I'm wrong: this as of
now is unfixed, as your patch to fix is afaics wasn't merged yet (at
least I can't see it even in next, but I might be missing something).

Hence adding it to the regression tracking now that the end of the merge
window is near:

#regzbot ^introduced eb0481bbc4ce
#regzbot title objtool: build failure
#regzbot monitor:
https://lore.kernel.org/all/20230629102051.42E8360467@lion.mk-sys.cz/
#regzbot fix: objtool: initialize all of struct elf
#regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
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