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fe2033b84f
Add a new fuzz target that exercises the parsing of git configs. The existing git_config_from_mem function is a perfect entry point for fuzzing as it exercises the same code paths as the rest of the config parsing functions and offers an easily fuzzable interface. Config parsing is a useful thing to fuzz because it operates on user controlled data and is a central component of many git operations. Signed-off-by: Brian C Tracy <brian.tracy33@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
34 lines
993 B
C
34 lines
993 B
C
#include "git-compat-util.h"
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#include "config.h"
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int LLVMFuzzerTestOneInput(const uint8_t *, size_t);
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static int config_parser_callback(const char *, const char *,
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const struct config_context *, void *);
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static int config_parser_callback(const char *key, const char *value,
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const struct config_context *ctx UNUSED,
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void *data UNUSED)
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{
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/*
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* Visit every byte of memory we are given to make sure the parser
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* gave it to us appropriately. We need to unconditionally return 0,
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* but we also want to prevent the strlen from being optimized away.
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*/
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size_t c = strlen(key);
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if (value)
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c += strlen(value);
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return c == SIZE_MAX;
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}
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int LLVMFuzzerTestOneInput(const uint8_t *data, const size_t size)
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{
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struct config_options config_opts = { 0 };
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config_opts.error_action = CONFIG_ERROR_SILENT;
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git_config_from_mem(config_parser_callback, CONFIG_ORIGIN_BLOB,
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"fuzztest-config", (const char *)data, size, NULL,
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CONFIG_SCOPE_UNKNOWN, &config_opts);
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return 0;
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}
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