diff options
| -rw-r--r-- | mm/kasan/report.c | 5 | ||||
| -rw-r--r-- | mm/kasan/report_generic.c | 4 | ||||
| -rw-r--r-- | mm/kasan/report_hw_tags.c | 1 | ||||
| -rw-r--r-- | mm/kasan/report_sw_tags.c | 4 |
4 files changed, 10 insertions, 4 deletions
diff --git a/mm/kasan/report.c b/mm/kasan/report.c index bb4c29b439b1..a0d4a9d3f933 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -444,10 +444,7 @@ static void __kasan_report(void *addr, size_t size, bool is_write, start_report(&flags, true); info.access_addr = addr; - if (addr_has_metadata(addr)) - info.first_bad_addr = kasan_find_first_bad_addr(addr, size); - else - info.first_bad_addr = addr; + info.first_bad_addr = kasan_find_first_bad_addr(addr, size); info.access_size = size; info.is_write = is_write; info.ip = ip; diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c index 7e03cca569a7..182239ca184c 100644 --- a/mm/kasan/report_generic.c +++ b/mm/kasan/report_generic.c @@ -34,8 +34,12 @@ void *kasan_find_first_bad_addr(void *addr, size_t size) { void *p = addr; + if (!addr_has_metadata(p)) + return p; + while (p < addr + size && !(*(u8 *)kasan_mem_to_shadow(p))) p += KASAN_GRANULE_SIZE; + return p; } diff --git a/mm/kasan/report_hw_tags.c b/mm/kasan/report_hw_tags.c index 5dbbbb930e7a..f3d3be614e4b 100644 --- a/mm/kasan/report_hw_tags.c +++ b/mm/kasan/report_hw_tags.c @@ -17,6 +17,7 @@ void *kasan_find_first_bad_addr(void *addr, size_t size) { + /* Return the same value regardless of whether addr_has_metadata(). */ return kasan_reset_tag(addr); } diff --git a/mm/kasan/report_sw_tags.c b/mm/kasan/report_sw_tags.c index 7271f0988fc0..7a26397297ed 100644 --- a/mm/kasan/report_sw_tags.c +++ b/mm/kasan/report_sw_tags.c @@ -36,8 +36,12 @@ void *kasan_find_first_bad_addr(void *addr, size_t size) void *p = kasan_reset_tag(addr); void *end = p + size; + if (!addr_has_metadata(p)) + return p; + while (p < end && tag == *(u8 *)kasan_mem_to_shadow(p)) p += KASAN_GRANULE_SIZE; + return p; } |