Messages in this thread | | | From | Toke Høiland-Jørgensen <> | Subject | Re: [syzbot] BUG: corrupted list in netif_napi_add | Date | Mon, 18 Oct 2021 19:40:40 +0200 |
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Jakub Kicinski <kuba@kernel.org> writes:
> 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?
Well, the other report[0] also kinda looks like the NAPI thread keeps running after it should have been disabled, so maybe they are in fact related?
-Toke
[0] https://lore.kernel.org/r/000000000000c1524005cdeacc5f@google.com
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