On Mon 18 Oct 2021 at 18:42, Jakub Kicinski <kuba@xxxxxxxxxx> wrote: > On Mon, 18 Oct 2021 17:04:19 +0300 Vlad Buslov wrote: >> We got a use-after-free with very similar trace [0] during nightly >> regression. The issue happens when ip link up/down state is flipped >> several times in loop and doesn't reproduce for me manually. The fact >> that it didn't reproduce for me after running test ten times suggests >> that it is either very hard to reproduce or that it is a result of some >> interaction between several tests in our suite. >> >> [0]: >> >> [ 3187.779569] mlx5_core 0000:08:00.0 enp8s0f0: Link up >> [ 3187.890694] ================================================================== >> [ 3187.892518] BUG: KASAN: use-after-free in __list_add_valid+0xc3/0xf0 >> [ 3187.894132] Read of size 8 at addr ffff8881150b3fb8 by task ip/119618 > > Hm, not sure how similar it is. This one looks like channel was freed > without deleting NAPI. Do you have list debug enabled? Yes, CONFIG_DEBUG_LIST is enabled.
