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: 9b73896a81dc ("kcm: Use stream parser")
Reported-by: Sechang Lim <rhkrqnwk98@gmail.com>
Signed-off-by: Junseo Lim <zirajs7@gmail.com>
Link: https://patch.msgid.link/20260813035136.106167-1-zirajs7@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions