bpf: Do not walk twice the hash map on free

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If someone stores both a timer and a workqueue in a hash map, on free, we
would walk it twice.

Add a check in htab_free_malloced_timers_or_wq and free the timers and
workqueues if they are present.

Fixes: 246331e3f1 ("bpf: allow struct bpf_wq to be embedded in arraymaps and hashmaps")
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/bpf/20240430-bpf-next-v3-2-27afe7f3b17c@kernel.org

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Benjamin Tissoires 2024-04-30 12:43:25 +02:00 • committed by Daniel Borkmann

parent b98a5c68cc

commit a891711d01

1 changed files with 13 additions and 36 deletions

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kernel/bpf/hashtab.c

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