libubox/tests/test-b64_decode.c, branch masterC utility functions for OpenWrthttps://git-03.infra.openwrt.org/project/libubox/atom?h=master2019-11-24T12:26:58Zbase64: fix possible null pointer dereference2019-11-24T12:26:58ZPetr Štetiar2019-11-19T16:16:40Zurn:sha1:0003ea9c45cc8d2f57af760a92a35f371649714f
clang-10 analyzer reports following:
base64.c:325:20: warning: Array access (from variable 'target') results in a null pointer dereference
target[tarindex] = 0;
~~~~~~ ^
and prepared test case confirms it:
Invalid write of size 1
at 0x4E4463F: b64_decode (base64.c:325)
by 0x40088C: test_invalid_inputs (tests/test-base64.c:26)
by 0x40088C: main (tests/test-base64.c:32)
Address 0x1 is not stack'd, malloc'd or (recently) free'd
Process terminating with default action of signal 11 (SIGSEGV)
Access not within mapped region at address 0x1
at 0x4E4463F: b64_decode (base64.c:325)
by 0x40088C: test_invalid_inputs (tests/test-base64.c:26)
by 0x40088C: main (tests/test-base64.c:32)
Signed-off-by: Petr Štetiar <ynezz@true.cz>