Transfering large packet will cause kernel general protection fault

Question

Transfering large packet will cause kernel general protection fault

Closed this issue 7 years ago · 2 comments

[ 9821.530741] traps: udp-tunnel[23597] general protection ip:7f6a6255ee07 sp:7fffe947abd0 error:0 in libgcc_s.so.1[7f6a62550000+16000]

*** stack smashing detected ***: ./uuu terminated                  │iiiiii iiiiiiii iiiiiiii iiiiiiii iiiiiiii iiiiiiii iiiiiiii iiiiii
[1]    25414 segmentation fault  ./uuu

When use nc -u <server> <port> then post a very large message
The program will crash and kernel said a GP# fault happen

Answer 1 · 2017-08-17T03:41:27.000Z

not urgent, but cannot use in production

Answer 2 · 2017-08-19T03:56:05.000Z

Fixed, for memcpy has a negative parmater on length
Checked code and fixed the bug