bpf: Add syscall common attributes support for map_create

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Many BPF_MAP_CREATE validation failures currently return -EINVAL without
any explanation to userspace.

Plumb common syscall log attributes into map_create(), create a verifier
log from bpf_common_attr::log_buf/log_size/log_level, and report
map-creation failure reasons through that buffer.

This improves debuggability by allowing userspace to inspect why map
creation failed and read back log_true_size from common attributes.

Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20260512153157.28382-7-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Leon Hwang 2026-05-12 23:31:55 +08:00 • committed by Alexei Starovoitov

parent ceeb7eda94

commit 49f9b2b2a1

3 changed files with 88 additions and 10 deletions

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3

include/linux/bpf_verifier.h

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29

kernel/bpf/log.c

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66

kernel/bpf/syscall.c

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