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Date: Thu, 15 Aug 2019 18:39:56 -0700 From: Bart Van Assche <bvanassche@....org> To: Will Deacon <will@...nel.org>, syzbot <syzbot+bd3bba6ff3fcea7a6ec6@...kaller.appspotmail.com> Cc: akpm@...ux-foundation.org, ast@...nel.org, bpf@...r.kernel.org, daniel@...earbox.net, davem@...emloft.net, dvyukov@...gle.com, hawk@...nel.org, hdanton@...a.com, jakub.kicinski@...ronome.com, johannes.berg@...el.com, johannes@...solutions.net, john.fastabend@...il.com, kafai@...com, linux-kernel@...r.kernel.org, longman@...hat.com, mingo@...nel.org, netdev@...r.kernel.org, paulmck@...ux.vnet.ibm.com, peterz@...radead.org, songliubraving@...com, syzkaller-bugs@...glegroups.com, tglx@...utronix.de, tj@...nel.org, torvalds@...ux-foundation.org, will.deacon@....com, xdp-newbies@...r.kernel.org, yhs@...com Subject: Re: WARNING in is_bpf_text_address On 8/15/19 12:51 AM, Will Deacon wrote: > Hi Bart, > > On Sat, Aug 10, 2019 at 05:24:06PM -0700, syzbot wrote: >> syzbot has found a reproducer for the following crash on: >> >> HEAD commit: 451577f3 Merge tag 'kbuild-fixes-v5.3-3' of git://git.kern.. >> git tree: upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=120850a6600000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=2031e7d221391b8a >> dashboard link: https://syzkaller.appspot.com/bug?extid=bd3bba6ff3fcea7a6ec6 >> compiler: clang version 9.0.0 (/home/glider/llvm/clang >> 80fee25776c2fb61e74c1ecb1a523375c2500b69) >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130ffe4a600000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17137d2c600000 >> >> The bug was bisected to: >> >> commit a0b0fd53e1e67639b303b15939b9c653dbe7a8c4 >> Author: Bart Van Assche <bvanassche@....org> >> Date: Thu Feb 14 23:00:46 2019 +0000 >> >> locking/lockdep: Free lock classes that are no longer in use >> >> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=152f6a9da00000 >> final crash: https://syzkaller.appspot.com/x/report.txt?x=172f6a9da00000 >> console output: https://syzkaller.appspot.com/x/log.txt?x=132f6a9da00000 > > I know you don't think much to these reports, but please could you have a > look (even if it's just to declare it a false positive)? Hi Will, Had you already noticed the following message? https://lore.kernel.org/bpf/d76d7a63-7854-e92d-30cb-52546d333ffe@iogearbox.net/ From that message: "Hey Bart, don't think it's related in any way to your commit. I'll allocate some time on working on this issue today, thanks!" Bart.
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