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Sun, 01 Nov 2026 01:14:02 -0800 (PST) Date: Sun, 01 Nov 2026 01:14:02 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ae702da.2ce51036.253fae.0003.GAE@google.com> Subject: [moderation/CI] Re: bpf: keep the vmlinux BTF compressed until first use (CONFIG_DEBUG_INFO_BTF_LAZY) to save ~6 MB memory From: syzbot ci To: syzkaller-upstream-moderation@googlegroups.com Cc: syzbot@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable syzbot ci has tested the following series [v1] bpf: keep the vmlinux BTF compressed until first use (CONFIG_DEBUG_INF= O_BTF_LAZY) to save ~6 MB memory https://lore.kernel.org/all/20261031130959.23472-1-wanjay@amazon.com * [PATCH bpf-next 01/13] bpf: match program context types by name without v= mlinux BTF * [PATCH bpf-next 02/13] bpf: fetch the vmlinux BTF where kernel types ente= r a program * [PATCH bpf-next 03/13] bpf: check CAP_SYS_ADMIN before looking up bpffs d= elegation names * [PATCH bpf-next 04/13] bpf: move bpf_get_btf_vmlinux() to btf.c * [PATCH bpf-next 05/13] bpf: let btf_parse_module() adopt the caller's cop= y of the module BTF * [PATCH bpf-next 06/13] bpf: look up the struct_ops common value type in t= he given BTF * [PATCH bpf-next 07/13] bpf: parse the vmlinux BTF before taking cand_cach= e_mutex * [PATCH bpf-next 08/13] tracing: parse the vmlinux BTF when BTF-typed outp= ut is enabled * [PATCH bpf-next 09/13] bpf: keep the vmlinux BTF zstd-compressed in the k= ernel image * [PATCH bpf-next 10/13] bpf: defer kfunc and struct_ops registrations unti= l first BTF use * [PATCH bpf-next 11/13] bpf: keep module BTF until the vmlinux BTF is pars= ed * [PATCH bpf-next 12/13] selftests/bpf: keep ksyms and linked_vars working = without __start_BTF * [PATCH bpf-next 13/13] Documentation/bpf: describe CONFIG_DEBUG_INFO_BTF_= LAZY and found the following issue: kernel build error Full report is available here: https://ci.syzbot.org/series/a458b725-04a7-4acd-8bae-03303a203fc2 *** kernel build error tree: bpf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf= -next.git base: eaae576c34d7e001767b6845a5950b0b8db3e68a arch: amd64 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/4c72fd33-a422-4d38-8276-d463202193f= f/config ./scripts/gen-btf.sh: 96: zstd: not found *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a fix for this bug, please reply with `#syz test` (on a separate line) and attach the patch to the email. Notes: - The patch will be applied on top of the tested series (as an incremental fix). - To test a new version of the whole series, please send it directly to syzbot@lists.linux.dev. - Arguments like custom git repos and branches are not supported. The email will later be sent to: [abuehaze@amazon.com almagui@kernel.org andrii@kernel.org arnd@arndb.de ast= @kernel.org bpf@vger.kernel.org daniel@iogearbox.net doebel@amazon.de eddyz= 87@gmail.com ihor.solodrai@linux.dev jay.wang.upstream@gmail.com jolsa@kern= el.org linux-arch@vger.kernel.org linux-doc@vger.kernel.org linux-kbuild@vg= er.kernel.org linux-kernel@vger.kernel.org linux-trace-kernel@vger.kernel.o= rg martin.lau@linux.dev mathieu.desnoyers@efficios.com memxor@gmail.com mhi= ramat@kernel.org mpohlack@amazon.de nathan@kernel.org nsc@kernel.org rosted= t@goodmis.org wanjay@amazon.com x86@kernel.org yonghong.song@linux.dev] If the report looks fine to you, reply with: #syz upstream If the report is a false positive, reply with #syz invalid