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mm: prevent KASAN false positives in kmemleak

When kmemleak dumps contents of leaked objects it reads whole objects regardless of user-requested size. This upsets KASAN. Disable KASAN checks around object dump.

Dmitry Vyukov committed 10 years ago

Commit 5c335fe1 parent c8cc7081 file · +2 −0Browse files

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mm/kmemleak.c+2−0
@@ -307,8 +307,10 @@ static void hex_dump_object(struct seq_file *seq, · 306 unmodified lines
307307 len = min_t(size_t, object->size, HEX_MAX_LINES * HEX_ROW_SIZE);
308308
309309 seq_printf(seq, " hex dump (first %zu bytes):\n", len);
310+ kasan_disable_current();
310311 seq_hex_dump(seq, " ", DUMP_PREFIX_NONE, HEX_ROW_SIZE,
311312 HEX_GROUP_SIZE, ptr, len, HEX_ASCII);
313+ kasan_enable_current();
312314 }
313315
314316 /*