selftests/bpf: Prevent allocating data larger than a page

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Fix a bug in the task local data library that may allocate more than a
a page for tld_data_u. This may happen when users set a too large
TLD_DYN_DATA_SIZE, so check it when creating dynamic TLD fields and fix
the corresponding selftest.

Signed-off-by: Amery Hung <ameryhung@gmail.com>
Link: https://lore.kernel.org/r/20260413190259.358442-2-ameryhung@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Amery Hung 2026-04-13 12:02:57 -07:00 • committed by Alexei Starovoitov

parent b3dde701e7

commit 36bf7beb9d

2 changed files with 15 additions and 6 deletions

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3

tools/testing/selftests/bpf/prog_tests/task_local_data.h

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18

tools/testing/selftests/bpf/prog_tests/test_task_local_data.c

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