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linux/mm/kasan
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Alexander Potapenko 83a4f1ef45 stackdepot: reserve 5 extra bits in depot_stack_handle_t 
Some users (currently only KMSAN) may want to use spare bits in
depot_stack_handle_t.  Let them do so by adding @extra_bits to
__stack_depot_save() to store arbitrary flags, and providing
stack_depot_get_extra_bits() to retrieve those flags.

Also adapt KASAN to the new prototype by passing extra_bits=0, as KASAN
does not intend to store additional information in the stack handle.

Link: https://lkml.kernel.org/r/20220915150417.722975-3-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-03 14:03:18 -07:00
..
common.c stackdepot: reserve 5 extra bits in depot_stack_handle_t 2022-10-03 14:03:18 -07:00
generic.c kasan: move kasan_get_alloc/free_track definitions 2022-10-03 14:02:59 -07:00
hw_tags.c kasan: support kasan.stacktrace for SW_TAGS 2022-10-03 14:03:01 -07:00
init.c kasan: use MAX_PTRS_PER_* for early shadow tables 2021-06-29 10:53:53 -07:00
kasan_test_module.c kasan: move tests to mm/kasan/ 2022-10-03 14:03:02 -07:00
kasan_test.c kasan: move tests to mm/kasan/ 2022-10-03 14:03:02 -07:00
kasan.h kasan: dynamically allocate stack ring entries 2022-10-03 14:03:02 -07:00
Makefile kasan: move tests to mm/kasan/ 2022-10-03 14:03:02 -07:00
quarantine.c kasan: give better names to shadow values 2022-05-13 07:20:19 -07:00
report_generic.c kasan: better invalid/double-free report header 2022-10-03 14:03:02 -07:00
report_hw_tags.c kasan: simplify kasan_find_first_bad_addr call sites 2022-03-24 19:06:49 -07:00
report_sw_tags.c kasan: simplify kasan_find_first_bad_addr call sites 2022-03-24 19:06:49 -07:00
report_tags.c kasan: better invalid/double-free report header 2022-10-03 14:03:02 -07:00
report.c kasan: better invalid/double-free report header 2022-10-03 14:03:02 -07:00
shadow.c UML: add support for KASAN under x86_64 2022-07-17 23:35:22 +02:00
sw_tags.c kasan: support kasan.stacktrace for SW_TAGS 2022-10-03 14:03:01 -07:00
tags.c kasan: dynamically allocate stack ring entries 2022-10-03 14:03:02 -07:00