Record Case Detail

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 pwd: /out/package
ppid: 5157
   1: WRITELN echo 321 > 1.txt
   2: WRITELN <
   3: WRITELN 1.txt cat
   4: WRITELN ls
   5: WRITELN exit
exit: 1

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.

mumsh $ =================================================================
==5158==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x619000000480 at pc 0x0000005189e9 bp 0x7ffe844a1e90 sp 0x7ffe844a1e88
READ of size 1 at 0x619000000480 thread T0
    #0 0x5189e8  (/out/package/mumsh_memory_check+0x5189e8)
    #1 0x7fa1a9069b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #2 0x41d1a9  (/out/package/mumsh_memory_check+0x41d1a9)

0x619000000480 is located 0 bytes to the right of 1024-byte region [0x619000000080,0x619000000480)
allocated by thread T0 here:
    #0 0x4dd288  (/out/package/mumsh_memory_check+0x4dd288)
    #1 0x517ad0  (/out/package/mumsh_memory_check+0x517ad0)
    #2 0x7fa1a9069b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/out/package/mumsh_memory_check+0x5189e8) 
Shadow bytes around the buggy address:
  0x0c327fff8040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c327fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c3

mumsh $ mumsh $ > 321
mumsh $ 1.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

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