Messages in this thread | | | Subject | Re: [PATCH v2 1/9] kasan: introduce helper functions for determining bug type | From | Andrey Ryabinin <> | Date | Fri, 3 Mar 2017 16:15:10 +0300 |
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On 03/02/2017 04:48 PM, Andrey Konovalov wrote: > Introduce get_shadow_bug_type() function, which determines bug type > based on the shadow value for a particular kernel address. > Introduce get_wild_bug_type() function, which determines bug type > for addresses which don't have a corresponding shadow value. > > Signed-off-by: Andrey Konovalov <andreyknvl@google.com> > --- > mm/kasan/report.c | 40 ++++++++++++++++++++++++++++++---------- > 1 file changed, 30 insertions(+), 10 deletions(-) > > diff --git a/mm/kasan/report.c b/mm/kasan/report.c > index f479365530b6..2790b4cadfa3 100644 > --- a/mm/kasan/report.c > +++ b/mm/kasan/report.c > @@ -49,7 +49,13 @@ static const void *find_first_bad_addr(const void *addr, size_t size) > return first_bad_addr; > } > > -static void print_error_description(struct kasan_access_info *info) > +static bool addr_has_shadow(struct kasan_access_info *info) > +{ > + return (info->access_addr >= > + kasan_shadow_to_mem((void *)KASAN_SHADOW_START)); > +} > + > +static const char *get_shadow_bug_type(struct kasan_access_info *info) > { > const char *bug_type = "unknown-crash"; > u8 *shadow_addr; > @@ -96,6 +102,27 @@ static void print_error_description(struct kasan_access_info *info) > break; > } > > + return bug_type; > +} > + > +const char *get_wild_bug_type(struct kasan_access_info *info)
static
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