UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000004 (pc 0x00000085c76a bp 0x7f1dc97f55e0 sp 0x7f1dc97f5580 T28202)

[h0rs3fa11]

I ran the file compiled with hfuzz-clang and reported this error, which caused each item to crash during the fuzzing test.

==28194==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000004 (pc 0x00000085c76a bp 0x7f1dc97f55e0 sp 0x7f1dc97f5580 T28202)
==28194==The signal is caused by a READ memory access.
==28194==Hint: address points to the zero page.
...
#0 0x85c769 
    #1 0x1d56b4c 
    #2 0x1d56a95
    #3 0x1daf903
    #4 0x1daf5de
    #5 0x1dadbe4
    #6 0x1dcdc23
    #7 0x1dcca2b 
    #8 0x1e37067 
    #9 0x1e2d3e7
    #10 0x1dcf3b0 
    #11 0x1db494f 
    #12 0x1db43c0 
    #13 0x7f1dd18e3ea4  (/lib64/libpthread.so.0+0x7ea4)
    #14 0x7f1dd0be49fc  (/lib64/libc.so.6+0xfe9fc)

OS: centos 7 & ubuntu 20.04

[robertswiecki]

Can you compile with -ggdb and repeat?