bpf: Compare iterator types during state pruning

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An iterator stack slot can be MEM_RCU or PTR_UNTRUSTED. These states
must not be equal, or the verifier can prune an unsafe path.

Compare the pointer type for STACK_ITER slots.

Fixes: dfab99df14 ("bpf: teach the verifier to enforce css_iter and task_iter in RCU CS")
Signed-off-by: Ning Ding <dingning04@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260811035955.132989-2-dingning04@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

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Ning Ding 2026-08-10 20:59:54 -07:00 • committed by Eduard Zingerman

parent d114bb9893

commit 83608e303b

1 changed files with 2 additions and 1 deletions

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kernel/bpf/states.c

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