lkml.org 
[lkml]   [2022]   [Jul]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH mm v2 26/33] kasan: introduce complete_report_info
Date
From: Andrey Konovalov <andreyknvl@google.com>

Introduce a complete_report_info() function that fills in the
first_bad_addr field of kasan_report_info instead of doing it in
kasan_report_*().

This function will be extended in the next patch.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
mm/kasan/kasan.h | 5 ++++-
mm/kasan/report.c | 17 +++++++++++++++--
2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 4fddfdb08abf..7e07115873d3 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -153,12 +153,15 @@ enum kasan_report_type {
};

struct kasan_report_info {
+ /* Filled in by kasan_report_*(). */
enum kasan_report_type type;
void *access_addr;
- void *first_bad_addr;
size_t access_size;
bool is_write;
unsigned long ip;
+
+ /* Filled in by the common reporting code. */
+ void *first_bad_addr;
};

/* Do not change the struct layout: compiler ABI. */
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index dc38ada86f85..0c2e7a58095d 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -413,6 +413,17 @@ static void print_report(struct kasan_report_info *info)
}
}

+static void complete_report_info(struct kasan_report_info *info)
+{
+ void *addr = kasan_reset_tag(info->access_addr);
+
+ if (info->type == KASAN_REPORT_ACCESS)
+ info->first_bad_addr = kasan_find_first_bad_addr(
+ info->access_addr, info->access_size);
+ else
+ info->first_bad_addr = addr;
+}
+
void kasan_report_invalid_free(void *ptr, unsigned long ip, enum kasan_report_type type)
{
unsigned long flags;
@@ -430,11 +441,12 @@ void kasan_report_invalid_free(void *ptr, unsigned long ip, enum kasan_report_ty

info.type = type;
info.access_addr = ptr;
- info.first_bad_addr = kasan_reset_tag(ptr);
info.access_size = 0;
info.is_write = false;
info.ip = ip;

+ complete_report_info(&info);
+
print_report(&info);

end_report(&flags, ptr);
@@ -463,11 +475,12 @@ bool kasan_report(unsigned long addr, size_t size, bool is_write,

info.type = KASAN_REPORT_ACCESS;
info.access_addr = ptr;
- info.first_bad_addr = kasan_find_first_bad_addr(ptr, size);
info.access_size = size;
info.is_write = is_write;
info.ip = ip;

+ complete_report_info(&info);
+
print_report(&info);

end_report(&irq_flags, ptr);
--
2.25.1
\
 
 \ /
  Last update: 2022-07-19 02:15    [W:0.165 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site