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malloc: harden removal from unsorted list
* malloc/malloc.c (_int_malloc): Added check before removing from unsorted list.
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@ -3775,6 +3775,8 @@ _int_malloc (mstate av, size_t bytes)
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}
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/* remove from unsorted list */
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if (__glibc_unlikely (bck->fd != victim))
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malloc_printerr ("malloc(): corrupted unsorted chunks 3");
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unsorted_chunks (av)->bk = bck;
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bck->fd = unsorted_chunks (av);
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