linux/mm/kmsan
Alexander Potapenko d749cc7547 mm: kmsan: remove runtime checks from kmsan_unpoison_memory()
Similarly to what's been done in commit 85716a80c1 ("kmsan: allow using
__msan_instrument_asm_store() inside runtime"), it should be safe to call
kmsan_unpoison_memory() from within the runtime, as it does not allocate
memory or take locks.  Remove the redundant runtime checks.

This should fix false positives seen with CONFIG_DEBUG_LIST=y when
the non-instrumented lib/stackdepot.c failed to unpoison the memory
chunks later checked by the instrumented lib/list_debug.c

Also replace the implementation of kmsan_unpoison_entry_regs() with
a call to kmsan_unpoison_memory().

Link: https://lkml.kernel.org/r/20240124173134.1165747-1-glider@google.com
Fixes: f80be4571b ("kmsan: add KMSAN runtime core")
Signed-off-by: Alexander Potapenko <glider@google.com>
Tested-by: Marco Elver <elver@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Nicholas Miehlbradt <nicholas@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22 10:24:41 -08:00
..
core.c kmsan: use stack_depot_save instead of __stack_depot_save 2023-12-10 16:51:46 -08:00
hooks.c mm: kmsan: remove runtime checks from kmsan_unpoison_memory() 2024-02-22 10:24:41 -08:00
init.c mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER 2024-01-08 15:27:15 -08:00
instrumentation.c kasan,kmsan: remove __GFP_KSWAPD_RECLAIM usage from kasan/kmsan 2023-06-23 16:59:26 -07:00
kmsan_test.c kmsan: introduce test_memcpy_initialized_gap() 2023-10-04 10:32:22 -07:00
kmsan.h kmsan: core: kmsan_in_runtime() should return true in NMI context 2022-11-08 15:57:24 -08:00
Makefile kmsan: disable ftrace in kmsan core code 2023-02-20 12:46:16 -08:00
report.c
shadow.c mm: kmsan: panic on failure to allocate early boot metadata 2023-10-25 16:47:10 -07:00