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

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Message-ID: <20230709140929.5sdcvyqquotkn752@carpenter>
Date:   Sun, 9 Jul 2023 17:09:29 +0300
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Linux regressions mailing list <regressions@...ts.linux.dev>
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: Re: build failure after commit eb0481bbc4ce ("objtool: Fix
 reloc_hash size")

On Sat, Jul 08, 2023 at 03:40:50PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
> 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).

Yes, the fix has not been merged yet and current master (commit
1c7873e33645) still shows the issue.

Michal

> 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

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