2.2.6 - exec.c - CONFIG_BINFMT_MISC inconsistency .

Sharad Agrawal (sagrawal@hss.hns.com)
Mon, 26 Apr 1999 13:36:13 +0530 (IST)

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Hi,

This is the final mail on this topici from our side. According to the
response from *Linus* it is a policy to allow root users to override
existing binary formats registered in the kernel via the
CONFIG_BINFMT_MISC interface.

What we are trying to point out is , that this policy is not
consistently followed when the support for CONFIG_BINFMT_MISC is compiled
into the kernel.

When the support is compiled into the kernel , MISC handlers reach the end
of the linked list, hence overriding existing formats is not possible

When the support is compiled as the module , MISC handlers are at the
beginning of the linked list, hence overrides are possible.

To make this consistent we have attached the patch to exec.c , which
now calls init_misc_binfmt() at the end of the initialisation
sequence hence making sure that if the support for CONFIG_BINFMT_MISC
is compiled into the kernel , the handlers are attached at the beginning
of the linked list , making overrides possible.

This according to us is a viable solution.

Comments ??

Regards,
Sharad/Suman
Hughes Software Systems, India

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