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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 <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Marco Elver <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Dmitriy Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrey Konovalov authored and Linus Torvalds committed 2022-03-24 19:06:48 -07:00
1 parent 2dfd1bd992
commit c056a364e9
1 file changed
+14 -1
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mm/kasan/report.c
+14 -1
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@@ -260,8 +260,21 @@ 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");
}