bootconfig: Skip internal tree sanity checks in kernel

In xbc_verify_tree(), the loop iterating through all nodes to check that
xbc_nodes[i].next < xbc_node_num and xbc_nodes[i].child < xbc_node_num
is a defensive sanity check against implementation regressions (such
an out-of-bounds index cannot be produced by malformed input).

Running this check in the kernel adds unnecessary boot-time overhead.
Split this check out into xbc_sanity_check_tree() for userspace, so
that it continues to run during userspace bootconfig validation (e.g.
when applying or testing bootconfig with tools/bootconfig), but is
omitted in the kernel to speed up initialization.

Link: https://lore.kernel.org/all/178913600409.248794.12941798680046327623.stgit@devnote2/

Reported-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Closes: https://lore.kernel.org/all/20260905141637.1547429-1-ekffu200098@gmail.com/
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Sang-Heon Jeon <ekffu200098@gmail.com>

0 files changed, 0 insertions, 0 deletions