On Fri, 6 Dec 2024 at 13:37, Jiri Olsa <olsajiri@xxxxxxxxx> wrote: > > On Fri, Nov 15, 2024 at 06:17:12PM +0100, Laura Nao wrote: > > On 11/13/24 10:37, Laura Nao wrote: > > > > > > Currently, KernelCI only retains the bzImage, not the vmlinux binary. The > > > bzImage can be downloaded from the same link mentioned above by selecting > > > 'kernel' from the dropdown menu (modules can also be downloaded the same > > > way). I’ll try to replicate the build on my end and share the vmlinux > > > with DWARF data stripped for convenience. > > > > > > > I managed to reproduce the issue locally and I've uploaded the vmlinux[1] > > (stripped of DWARF data) and vmlinux.raw[2] files, as well as one of the > > modules[3] and its btf data[4] extracted with: > > > > bpftool -B vmlinux btf dump file cros_kbd_led_backlight.ko > cros_kbd_led_backlight.ko.raw > > > > Looking again at the logs[5], I've noticed the following is reported: > > > > [ 0.415885] BPF: type_id=115803 offset=177920 size=1152 > > [ 0.416029] BPF: > > [ 0.416083] BPF: Invalid offset > > [ 0.416165] BPF: > > > > There are two different definitions of rcu_data in '.data..percpu', one > > is a struct and the other is an integer: > > > > type_id=115801 offset=177920 size=1152 (VAR 'rcu_data') > > type_id=115803 offset=177920 size=1152 (VAR 'rcu_data') > > > > [115801] VAR 'rcu_data' type_id=115572, linkage=static > > [115803] VAR 'rcu_data' type_id=1, linkage=static > > > > [115572] STRUCT 'rcu_data' size=1152 vlen=69 > > [1] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) > > > > I assume that's not expected, correct? > > yes, that seems wrong.. but I can't reproduce with your config > together with pahole 1.24 .. could you try with latest one? > As a data point, I ran into this problem with pahole 1.27 on bpf/master, I see the same rcu_data duplication. For now I'm probably going to test patches with the latest pahole. > jirka > > > > > I'll dig a bit deeper and report back if I can find anything else. > > > > [1] https://people.collabora.com/~laura.nao/dbg-btf-mismatch-next-20241113/vmlinux > > [2] https://people.collabora.com/~laura.nao/dbg-btf-mismatch-next-20241113/vmlinux.raw > > [3] https://people.collabora.com/~laura.nao/dbg-btf-mismatch-next-20241113/cros_kbd_led_backlight.ko > > [4] https://people.collabora.com/~laura.nao/dbg-btf-mismatch-next-20241113/cros_kbd_led_backlight.ko.raw > > [5] https://pastebin.com/raw/FvvrPhAY > > > > Best, > > > > Laura > > >
