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coredump: make core dump functionality optional

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Adds an expert Kconfig option, CONFIG_COREDUMP, which allows disabling of
core dump.  This saves approximately 2.6k in the compiled kernel, and
complements CONFIG_ELF_CORE, which now depends on it.

CONFIG_COREDUMP also disables coredump-related sysctls, except for
suid_dumpable and related functions, which are necessary for ptrace.

[[email protected]: fix binfmt_aout.c build]
Signed-off-by: Alex Kelly <[email protected]>
Reviewed-by: Josh Triplett <[email protected]>
Acked-by: Serge Hallyn <[email protected]>
Acked-by: Kees Cook <[email protected]>
Cc: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alex Kelly 2012-10-04 17:15:23 -07:00 • committed by Linus Torvalds
commit 046d662f48
6 changed files with 53 additions and 27 deletions
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1
init/Kconfig
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@ -1199,6 +1199,7 @@ config BUG
Just say Y.
config ELF_CORE
depends on COREDUMP
default y
bool "Enable ELF core dumps" if EXPERT
help