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| author | Andrii Nakryiko <andrii@kernel.org> | 2023-04-06 16:42:00 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-04-11 18:05:44 +0200 |
| commit | fac08d45e2531f91d8fb3d11fc6576f588049476 (patch) | |
| tree | abf0852537b3d1911825b51e49e0a178316459e9 /tools/lib/bpf/bpf.c | |
| parent | bdcab4144f5da97cc0fa7e1dd63b8475e10c8f0a (diff) | |
| download | linux-fac08d45e2531f91d8fb3d11fc6576f588049476.tar.gz linux-fac08d45e2531f91d8fb3d11fc6576f588049476.tar.bz2 linux-fac08d45e2531f91d8fb3d11fc6576f588049476.zip | |
bpf: Relax log_buf NULL conditions when log_level>0 is requested
Drop the log_size>0 and log_buf!=NULL condition when log_level>0. This
allows users to request log_true_size of a full log without providing
actual (even if small) log buffer. Verifier log handling code was mostly
ready to handle NULL log->ubuf, so only few small changes were necessary
to prevent NULL log->ubuf from causing problems.
Note, that if user provided NULL log_buf with log_level>0 we don't
consider this a log truncation, and thus won't return -ENOSPC.
We also enforce that either (log_buf==NULL && log_size==0) or
(log_buf!=NULL && log_size>0).
Suggested-by: Lorenz Bauer <lmb@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-15-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/bpf.c')
0 files changed, 0 insertions, 0 deletions