backend-native: Fix stack corruption reading RFCOMM AT+BIA= response
On-stack buffer size is too short for sscanf to read AT+BIA=
and AT+BAC=
response strings which have variable length.
Fix this by replacing sscanf
with proper copy of input string.
Fixes: cca0d693 ("bluetooth: add AT+BIA support") of !631 (merged)
Problem call stack:
Program terminated with signal SIGABRT, Aborted.
[...]
#5 0x00007f63b9ccefe2 in __GI___fortify_fail (msg=msg@entry=0x7f63b9d4d0bd "stack smashing detected") at fortify_fail.c:26
#6 0x00007f63b9ccefc0 in __stack_chk_fail () at stack_chk_fail.c:24
#7 0x00007f63b17fb597 in hfp_rfcomm_handle (fd=24, t=0x560c901848f0, buf=0x7ffd6d6a1230 "AT+BIA=1,1,1,1,0,0\r") at ../src/modules/bluetooth/backend-native.c:814