list: Split list_del() debug checking into separate function

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Similar to the list_add() debug consolidation, this commit consolidates
the debug checking performed during CONFIG_DEBUG_LIST into a new
__list_del_entry_valid() function, and stops list updates when corruption
is found.

Refactored from same hardening in PaX and Grsecurity.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Rik van Riel <riel@redhat.com>

...

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Kees Cook 2016-08-17 14:42:10 -07:00 • committed by Paul E. McKenney

parent 54acd4397d

commit 0cd340dcb0

2 changed files with 32 additions and 36 deletions

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include/linux/list.h

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