Notes
This function is in beta test. Please help improve it in the issues
here.
Hints
Your answer may be identical to the JOJ answer in the first several lines.
However, the main problem you meet now is Runtime Error. And the exit code of your program is 1, which should be 0.
Please double check your code to solve this problem and try again.
Your Answer
mumsh $ mumsh $ mumsh $ mumsh $ ================================================================= ==2627==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7fff44ba59de at pc 0x0000005234ea bp 0x7fff44ba5630 sp 0x7fff44ba5628 READ of size 1 at 0x7fff44ba59de thread T0 #0 0x5234e9 (/out/package/mumsh_memory_check+0x5234e9) #1 0x525e1b (/out/package/mumsh_memory_check+0x525e1b) #2 0x7f11cf857b96 (/lib/x86_64-linux-gnu/libc.so.6+0x21b96) #3 0x41d2c9 (/out/package/mumsh_memory_check+0x41d2c9) Address 0x7fff44ba59de is located in stack of thread T0 at offset 30 in frame #0 0x525bff (/out/package/mumsh_memory_check+0x525bff) This frame has 1 object(s): [32, 1056) 'input' <== Memory access at offset 30 underflows this variable HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext (longjmp and C++ exceptions *are* supported) SUMMARY: AddressSanitizer: stack-buffer-underflow (/out/package/mumsh_memory_check+0x5234e9)
JOJ Answer
mumsh $ mumsh $ mumsh $ mumsh $ mumsh $ 123 mumsh $ 222 mumsh $ 222 321 mumsh $ 321 mumsh $ 1.txt 2.txt 3.txt 4.txt driver mumsh mumsh_memory_check mumsh $ exit