On Sun, 2023-02-26 at 03:03 +0200, Eduard Zingerman wrote: > On Sat, 2023-02-25 at 20:50 +0000, Matt Bobrowski wrote: > > Sorry Eduard, I replied late last night although the email bounced due > > to exceeding the mail char limit. Let's try attaching a compressed > > variant of the requested files, which includes the compiled kernel's > > BTF and the kernel's config. > > Hi Matt, > > I tried using your config but still can't reproduce the issue. > Will try to do it using debian 12 chroot tomorrow or on Monday. Hi Matt, Short update: I've reproduced the issue with multiple STRUCT 'linux_binprm' BTF IDs in Debian testing chroot, thank you for providing all details. Attaching the instructions in the end of the email. Need some time to analyze pahole behavior. Thanks, Eduard -- host root: mkdir bookworm sudo debootstrap testing bookworm/ http://deb.debian.org/debian/ sudo mount -t proc proc bookworm/proc/ sudo mount -t sysfs sys bookworm/sys/ sudo chroot bookworm/ /bin/bash bookworm root: apt install python3 bc build-essential git \ cmake libdwarf-dev libdw-dev flex bison \ kmod cpio libncurses5-dev libelf-dev libssl-dev adduser eddy sudo eddy bookworm user: cd ~ git clone git://git.kernel.org/pub/scm/devel/pahole/pahole.git mkdir build && \ cd build && \ cmake -D__LIB=lib .. && \ make -j $(nproc) export PATH=/home/eddy/pahole/build/:$PATH cd ~ git clone https://github.com/torvalds/linux.git && cd linux make defconfig && make kvm_guest.config scripts/config \ -e BPF \ -e BPF_SYSCALL \ -e BPF_LSM \ -e BPF_JIT \ -e BPF_EVENTS \ -e DEBUG_INFO \ -e DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT \ -e DEBUG_INFO_BTF \ -e DEBUG_INFO_BTF_MODULES \ -e PAHOLE_HAS_SPLIT_BTF \ -e FTRACE \ -e DYNAMIC_FTRACE \ -e FUNCTION_TRACER make olddefconfig # Multiple warnings in the end: # WARN: multiple IDs found for 'task_struct': 176, 23383 - using 176 # WARN: multiple IDs found for 'file': 638, 23422 - using 638 # ... make -C ./tools/bpf/bpftool ./tools/bpf/bpftool/bpftool btf dump file ./vmlinux | \ grep -c linux_binprm # The output is 19 for me Repository versions: - kernel: f3a2439f20d9 ("Merge tag 'rproc-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux") - pahole: 431df45 ("btfdiff: Exclude Rust CUs since those are not yet being converted to BTF on the Linux kernel")
