linux/mm/kasan
Juntong Deng 952237b5a9 kasan: increase the number of bits to shift when recording extra timestamps
In 5d4c6ac946 ("kasan: record and report more information") I thought
that printk only displays a maximum of 99999 seconds, but actually printk
can display a larger number of seconds.

So increase the number of bits to shift when recording the extra timestamp
(44 bits), without affecting the precision, shift it right by 9 bits,
discarding all bits that do not affect the microsecond part (nanoseconds
will not be shown).

Currently the maximum time that can be displayed is 9007199.254740s,
because

11111111111111111111111111111111111111111111 (44 bits) << 9
= 11111111111111111111111111111111111111111111000000000
= 9007199.254740

Link: https://lkml.kernel.org/r/AM6PR03MB58481629F2F28CE007412139994D2@AM6PR03MB5848.eurprd03.prod.outlook.com
Fixes: 5d4c6ac946 ("kasan: record and report more information")
Signed-off-by: Juntong Deng <juntong.deng@outlook.com>
Acked-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22 15:27:20 -08:00
..
common.c kasan: increase the number of bits to shift when recording extra timestamps 2024-02-22 15:27:20 -08:00
generic.c kasan: guard release_free_meta() shadow access with kasan_arch_is_ready() 2024-02-20 14:20:50 -08:00
hw_tags.c kasan: check kasan_vmalloc_enabled in vmalloc tests 2023-12-29 11:58:45 -08:00
init.c kasan: Add (pmd|pud)_init for LoongArch zero_(pud|p4d)_populate process 2023-09-06 22:54:16 +08:00
kasan_test_module.c kasan: rename test_kasan_module_init to kasan_test_module_init 2024-02-22 10:24:53 -08:00
kasan_test.c kasan/test: avoid gcc warning for intentional overflow 2024-02-22 10:24:58 -08:00
kasan.h Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
Makefile kasan: test: fix test for new meminstrinsic instrumentation 2023-03-02 21:54:22 -08:00
quarantine.c Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
report_generic.c kasan: stop leaking stack trace handles 2024-01-05 10:17:45 -08:00
report_hw_tags.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
report_sw_tags.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
report_tags.c kasan: simplify kasan_complete_mode_report_info for tag-based modes 2023-12-29 11:58:47 -08:00
report.c kasan: increase the number of bits to shift when recording extra timestamps 2024-02-22 15:27:20 -08:00
shadow.c kasan: export kasan_poison as GPL 2023-12-29 11:58:45 -08:00
sw_tags.c kasan: use internal prototypes matching gcc-13 builtins 2023-06-09 16:25:19 -07:00
tags.c kasan: simplify saving extra info into tracks 2023-12-29 11:58:46 -08:00