bpf: Fix bounds for bpf_prog_get_file_line linfo loop

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We may overrun the bounds because linfo and jited_linfo are already
advanced to prog->aux->linfo_idx, hence we must only iterate the
remaining elements until we reach prog->aux->nr_linfo. Adjust the
nr_linfo calculation to fix this. Reported in [0].

  [0]: https://lore.kernel.org/bpf/f3527af3b0620ce36e299e97e7532d2555018de2.camel@gmail.com

Reported-by: Eduard Zingerman <eddyz87@gmail.com>
Fixes: 0e521efaf3 ("bpf: Add function to extract program source info")
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250705053035.3020320-2-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Kumar Kartikeya Dwivedi 2025-07-04 22:30:34 -07:00 • committed by Alexei Starovoitov

parent 6e5cae9dda

commit 116c8f4747

1 changed files with 3 additions and 1 deletions

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kernel/bpf/core.c

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