2010-11-19 Will Drewry <wad@google.com>
Tavis Ormandy <taviso@google.com> Jan Kratochvil <jan.kratochvil@redhat.com> * dwarf2read.c (decode_locdesc): Enforce location description stack boundaries.
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@ -1,3 +1,10 @@
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2010-11-19 Will Drewry <wad@google.com>
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Tavis Ormandy <taviso@google.com>
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Jan Kratochvil <jan.kratochvil@redhat.com>
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* dwarf2read.c (decode_locdesc): Enforce location description stack
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boundaries.
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2010-11-18 Pierre Muller <muller@ics.u-strasbg.fr>
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2010-11-18 Pierre Muller <muller@ics.u-strasbg.fr>
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* arm-tdep.c (arm_in_function_epilogue_p): Fix code when "MOV SP"
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* arm-tdep.c (arm_in_function_epilogue_p): Fix code when "MOV SP"
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@ -13279,8 +13279,7 @@ read_signatured_type (struct objfile *objfile,
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callers will only want a very basic result and this can become a
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callers will only want a very basic result and this can become a
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complaint.
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complaint.
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Note that stack[0] is unused except as a default error return.
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Note that stack[0] is unused except as a default error return. */
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Note that stack overflow is not yet handled. */
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static CORE_ADDR
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static CORE_ADDR
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decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
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decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
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@ -13297,6 +13296,7 @@ decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
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i = 0;
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i = 0;
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stacki = 0;
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stacki = 0;
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stack[stacki] = 0;
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stack[stacki] = 0;
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stack[++stacki] = 0;
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while (i < size)
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while (i < size)
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{
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{
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@ -13478,6 +13478,22 @@ decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
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dwarf_stack_op_name (op, 1));
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dwarf_stack_op_name (op, 1));
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return (stack[stacki]);
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return (stack[stacki]);
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}
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}
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/* Enforce maximum stack depth of SIZE-1 to avoid writing
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outside of the allocated space. Also enforce minimum>0. */
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if (stacki >= ARRAY_SIZE (stack) - 1)
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{
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complaint (&symfile_complaints,
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_("location description stack overflow"));
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return 0;
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}
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if (stacki <= 0)
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{
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complaint (&symfile_complaints,
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_("location description stack underflow"));
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return 0;
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}
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}
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}
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return (stack[stacki]);
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return (stack[stacki]);
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}
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}
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