Christophe Leroy b64913394f lkdtm: Really write into kernel text in WRITE_KERN ... WRITE_KERN is supposed to overwrite some kernel text, namely do_overwritten() function. But at the time being it overwrites do_overwritten() function descriptor, not function text. Fix it by dereferencing the function descriptor to obtain function text pointer. Export dereference_function_descriptor() for when LKDTM is built as a module. And make do_overwritten() noinline so that it is really do_overwritten() which is called by lkdtm_WRITE_KERN(). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/31e58eaffb5bc51c07d8d4891d1982100ade8cfc.1644928018.git.christophe.leroy@csgroup.eu		2022-02-16 23:25:12 +11:00
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bugs.c	lkdtm: avoid printk() in recursive_loop()	2021-12-16 15:54:37 -08:00
cfi.c	lkdtm: Add CONFIG hints in errors where possible	2021-06-24 15:32:08 +02:00
core.c	Char/Misc and other driver changes for 5.17-rc1	2022-01-14 16:02:28 +01:00
fortify.c	lkdtm/fortify: Consolidate FORTIFY_SOURCE tests	2021-08-18 22:28:51 +02:00
heap.c	lkdtm/heap: Avoid __alloc_size hint warning for VMALLOC_LINEAR_OVERFLOW	2021-08-18 22:28:51 +02:00
lkdtm.h	lkdtm/bugs: Check that a per-task stack canary exists	2021-10-25 09:13:46 +02:00
Makefile	Char/Misc and other driver changes for 5.17-rc1	2022-01-14 16:02:28 +01:00
perms.c	lkdtm: Really write into kernel text in WRITE_KERN	2022-02-16 23:25:12 +11:00
powerpc.c	lkdtm/powerpc: Add SLB multihit test	2020-12-04 01:01:34 +11:00
refcount.c	lkdtm: Remove references to CONFIG_REFCOUNT_FULL	2019-11-25 09:15:46 +01:00
rodata.c	lkdtm: don't move ctors to .rodata	2020-12-09 15:51:14 +01:00
stackleak.c	lkdtm: Add CONFIG hints in errors where possible	2021-06-24 15:32:08 +02:00
usercopy.c	lkdtm: Add CONFIG hints in errors where possible	2021-06-24 15:32:08 +02:00