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How do you prevent stack overflows?
One method to prevent stack overflow is to track the stack pointer with test and measurement methods. Use timer interrupts that periodically check the location of the stack pointer, record the largest value, and watch that it does not grow beyond that value.
When stack overflow happen which interrupt is generated?
When too large of array is declared on the stack, the “0” write will occur in the canary space and the processor will enter an Interrupt. Use this Interrupt to display pertinent information such as the program counter to get a line number of when the stack overflow occurred.
Which of the following is the most likely to mitigate against buffer overflow attacks?
Buffer overflow attacks can often be mitigated by ensuring that you keep up-to-date with system and application patches. As the vendor finds the vulnerabilities, that vendor will fix the issues through a patch. Input validation is also a common mitigation for buffer overflow attacks.
Why is the return address pushed to the stack?
Also, the return address is pushed to the stack before space for local variables is reserved, so the return address gets a higher address than the local variables. But arrays and buffers are still indexed upwards in memory, so writing past the end of the array will nicely hit the return address next on the stack.
Where is the return address stored in RSP?
The return address is pushed on the stack by the caller by means of the callq instruction. At the moment of entering the callee function it is at the top of the stack, i.e.: at that moment, rsp contains the address where the return address is stored.
Where does function stack save the return address?
At the moment of entering the callee function it is at the top of the stack, i.e.: at that moment, rsp contains the address where the return address is stored. p/x $rsp displays the value of the rsp register, i.e.: the address of the top of the stack, since rsp points to the top of the stack.
How does a ” stack overflow ” occur and how do you prevent it?
A stack overflow occurs when Jeff and Joel want to give the world a better place to get answers to technical questions. It’s too late to prevent this stack overflow. That “other site” could have prevented it by not being scuzzy.