hs_service.c: compile-time warning with GCC 9.1.1
I tried building with GCC 9.1.1 for the first time, and got various warnings.
make[1]: Entering directory '/home/nickm/src/tor-035'
CC src/feature/hs/hs_service.o
In file included from ./src/lib/crypt_ops/crypto_rsa.h:21,
from ./src/core/or/or.h:32,
from src/feature/hs/hs_service.c:11:
In function ‘load_client_keys’,
inlined from ‘load_service_keys’ at src/feature/hs/hs_service.c:1090:7,
inlined from ‘hs_service_load_all_keys’ at src/feature/hs/hs_service.c:4010:9:
./src/lib/log/log.h:244:3: error: ‘%s’ directive argument is null [-Werror=format-overflow=]
244 | log_fn_(LOG_WARN, domain, __FUNCTION__, args, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/feature/hs/hs_service.c:1267:7: note: in expansion of macro ‘log_warn’
1267 | log_warn(LD_REND, "Client authorization file %s can't be read. "
| ^~~~~~~~
src/feature/hs/hs_service.c: In function ‘hs_service_load_all_keys’:
src/feature/hs/hs_service.c:1267:52: note: format string is defined here
1267 | log_warn(LD_REND, "Client authorization file %s can't be read. "
| ^~
cc1: all warnings being treated as errors
make[1]: *** [Makefile:9877: src/feature/hs/hs_service.o] Error 1
CC src/feature/hs/core_libtor_app_testing_a-hs_service.o
In file included from ./src/lib/crypt_ops/crypto_rsa.h:21,
from ./src/core/or/or.h:32,
from src/feature/hs/hs_service.c:11:
In function ‘load_client_keys’,
inlined from ‘load_service_keys’ at src/feature/hs/hs_service.c:1090:7,
inlined from ‘hs_service_load_all_keys’ at src/feature/hs/hs_service.c:4010:9:
./src/lib/log/log.h:244:3: error: ‘%s’ directive argument is null [-Werror=format-overflow=]
244 | log_fn_(LOG_WARN, domain, __FUNCTION__, args, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/feature/hs/hs_service.c:1267:7: note: in expansion of macro ‘log_warn’
1267 | log_warn(LD_REND, "Client authorization file %s can't be read. "
| ^~~~~~~~
src/feature/hs/hs_service.c: In function ‘hs_service_load_all_keys’:
src/feature/hs/hs_service.c:1267:52: note: format string is defined here
1267 | log_warn(LD_REND, "Client authorization file %s can't be read. "
| ^~
cc1: all warnings being treated as errors
make[1]: *** [Makefile:11111: src/feature/hs/core_libtor_app_testing_a-hs_service.o] Error 1
make[1]: Target 'all-am' not remade because of errors.
make[1]: Leaving directory '/home/nickm/src/tor-035'
make: *** [Makefile:5788: all] Error 2
[1016]$
It looks like this is a real bug: when there's something wrong with the client authorization file, we first free and null the file, and only log its contents afterwards.
This appears to affect 0.3.5 and later.
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information