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* grub-core/kern/mm.c (get_header_from_pointer): Put a more informative

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message on double free. Put the value of magic in case of mismatch.
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Vladimir 'phcoder' Serbinenko committed 2012-06-22 23:54:43 +02:00
1 parent 9e86d4c59a
commit 3988c4a09f
2 files changed
+9 -1
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ChangeLog
+5
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@@ -1,3 +1,8 @@
2012-06-22 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/mm.c (get_header_from_pointer): Put a more informative
message on double free. Put the value of magic in case of mismatch.
2012-06-22 Vladimir Serbinenko <phcoder@gmail.com> 2012-06-22 Vladimir Serbinenko <phcoder@gmail.com>
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grub-core/kern/mm.c
+4 -1
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@@ -98,8 +98,11 @@ get_header_from_pointer (void *ptr, grub_mm_header_t *p, grub_mm_region_t *r)
grub_fatal ("out of range pointer %p", ptr); grub_fatal ("out of range pointer %p", ptr);
*p = (grub_mm_header_t) ptr - 1; *p = (grub_mm_header_t) ptr - 1;
if ((*p)->magic == GRUB_MM_FREE_MAGIC)
grub_fatal ("double free at %p", *p);
if ((*p)->magic != GRUB_MM_ALLOC_MAGIC) if ((*p)->magic != GRUB_MM_ALLOC_MAGIC)
grub_fatal ("alloc magic is broken at %p", *p); grub_fatal ("alloc magic is broken at %p: %lx", *p,
(unsigned long) (*p)->magic);
} }
/* Initialize a region starting from ADDR and whose size is SIZE, /* Initialize a region starting from ADDR and whose size is SIZE,