selftests/bpf: Fix count write in testapp_xdp_metadata_copy()

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Commit 4b30209255 ("selftests/xsk: Add tail adjustment tests and support
check") added a new global to xsk_xdp_progs.c, but left out the access in
the testapp_xdp_metadata_copy() function. Since bpf_map_update_elem() will
write to the whole bss section, it gets truncated. Fix by writing to
skel_rx->bss->count directly.

Fixes: 4b30209255 ("selftests/xsk: Add tail adjustment tests and support check")
Signed-off-by: Ricardo B. Marlière <rbm@suse.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250829-selftests-bpf-xsk_regression_fix-v1-1-5f5acdb9fe6b@suse.com

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Ricardo B. Marlière 2025-08-29 16:33:49 -03:00 • committed by Andrii Nakryiko

parent 2a912258c9

commit c9110e6f72

1 changed files with 1 additions and 13 deletions

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tools/testing/selftests/bpf/xskxceiver.c

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