module: add stop-grap sanity check on module memcpy()

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The integrity of the struct module we load is important, and although
our ELF validator already checks that the module section must match
struct module, add a stop-gap check before we memcpy() the final minted
module. This also makes those inspecting the code what the goal is.

While at it, clarify the goal behind updating the sh_addr address.
The current comment is pretty misleading.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

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Luis Chamberlain 2023-03-19 14:35:39 -07:00

parent 46752820f9

commit c7ee8aebf6

1 changed files with 22 additions and 4 deletions

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kernel/module/main.c

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