Junseo Lim b0346dd64e net: kcm: Hold RCU read lock while running BPF parser ...

kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which
prevents CPU migration, but does not establish an RCU read-side
critical section. Consequently, BPF map operations can trigger
WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser
program.

Hold the RCU read lock while running the program.

Fixes: 9b73896a81 ("kcm: Use stream parser")
Reported-by: Sechang Lim <[email protected]>
Signed-off-by: Junseo Lim <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

2026-08-17 13:43:58 -07:00

..

kcmproc.c

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kcmsock.c

net: kcm: Hold RCU read lock while running BPF parser

2026-08-17 13:43:58 -07:00

Kconfig

kcm: Fix typo and add hyphen in Kconfig help text

2025-11-18 18:21:04 -08:00

Makefile

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