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UPSTREAM: kasan: print virtual mapping info in reports

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Print virtual mapping range and its creator in reports affecting virtual
mappings.

Also get physical page pointer for such mappings, so page information gets
printed as well.

Link: https://lkml.kernel.org/r/6ebb11210ae21253198e264d4bb0752c1fad67d7.1645548178.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bug: 254721825
(cherry picked from commit c056a364e9546bd513d1f5205f0ee316d8acb910)
Change-Id: I241a02aa0968cb32d77db041ae9b41a3d18ebc77
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
This commit is contained in:
Andrey Konovalov
2022-03-24 18:12:11 -07:00
committed by Todd Kjos
parent d7045d5644
commit a64ce821c0
1 changed files with 14 additions and 1 deletions
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15
mm/kasan/report.c
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@@ -251,8 +251,21 @@ static void print_address_description(void *addr, u8 tag)
pr_err(" %pS\n", addr);
}
if (is_vmalloc_addr(addr)) {
struct vm_struct *va = find_vm_area(addr);
if (va) {
pr_err("The buggy address belongs to the virtual mapping at\n"
" [%px, %px) created by:\n"
" %pS\n",
va->addr, va->addr + va->size, va->caller);
page = vmalloc_to_page(page);
}
}
if (page) {
pr_err("The buggy address belongs to the page:\n");
pr_err("The buggy address belongs to the physical page:\n");
dump_page(page, "kasan: bad access detected");
}