43a103ff17
Fix out of bounds read in blobmsg_parse and blobmsg_check_name. The out of bounds read happens because blob_attr and blobmsg_hdr have flexible array members, whose size is 0 in the corresponding sizeofs. For example the __blob_for_each_attr macro checks whether rem >= sizeof(struct blob_attr). However, what LibFuzzer discovered was, if the input data was only 4 bytes, the data would be casted to blob_attr, and later on blob_data(attr) would be called even though attr->data was empty. The same issue could appear with data larger than 4 bytes, where data wasn't empty, but contained only the start of the blobmsg_hdr struct, and blobmsg_hdr name was empty. The bugs were discovered by fuzzing blobmsg_parse and blobmsg_array_parse with LibFuzzer. CC: Luka Perkov <luka.perkov@sartura.hr> Reviewed-by: Jo-Philipp Wich <jo@mein.io> Signed-off-by: Juraj Vijtiuk <juraj.vijtiuk@sartura.hr> [refactored some checks, added fuzz inputs, adjusted unit test results] Signed-off-by: Petr Štetiar <ynezz@true.cz>
73 lines
4.9 KiB
Perl
73 lines
4.9 KiB
Perl
check that blobmsg_parse is producing expected results:
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$ [ -n "$TEST_BIN_DIR" ] && export PATH="$TEST_BIN_DIR:$PATH"
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$ export FUZZ_CORPUS="$TESTDIR/../fuzz/corpus"
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$ for blob in $(LC_ALL=C find $FUZZ_CORPUS -type f | sort ); do
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> valgrind --quiet --leak-check=full test-blobmsg-parse $blob; \
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> test-blobmsg-parse-san $blob; \
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> done
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71520a5c4b5ca73903216857abbad54a8002d44a: blobmsg_parse: ... (0)
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71520a5c4b5ca73903216857abbad54a8002d44a: blobmsg_parse_array: ... (0)
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71520a5c4b5ca73903216857abbad54a8002d44a: blobmsg_parse: ... (0)
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71520a5c4b5ca73903216857abbad54a8002d44a: blobmsg_parse_array: ... (0)
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c1dfd96eea8cc2b62785275bca38ac261256e278: blobmsg_parse: ... (0)
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c1dfd96eea8cc2b62785275bca38ac261256e278: blobmsg_parse_array: ... (0)
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c1dfd96eea8cc2b62785275bca38ac261256e278: blobmsg_parse: ... (0)
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c1dfd96eea8cc2b62785275bca38ac261256e278: blobmsg_parse_array: ... (0)
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c42ac1c46f1d4e211c735cc7dfad4ff8391110e9: blobmsg_parse: ... (0)
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c42ac1c46f1d4e211c735cc7dfad4ff8391110e9: blobmsg_parse_array: ... (0)
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c42ac1c46f1d4e211c735cc7dfad4ff8391110e9: blobmsg_parse: ... (0)
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c42ac1c46f1d4e211c735cc7dfad4ff8391110e9: blobmsg_parse_array: ... (0)
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crash-1b8fb1be45db3aff7699100f497fb74138f3df4f: blobmsg_parse: ... (0)
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crash-1b8fb1be45db3aff7699100f497fb74138f3df4f: blobmsg_parse_array: ... (0)
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crash-1b8fb1be45db3aff7699100f497fb74138f3df4f: blobmsg_parse: ... (0)
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crash-1b8fb1be45db3aff7699100f497fb74138f3df4f: blobmsg_parse_array: ... (0)
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crash-333757b203a44751d3535f24b05f467183a96d09: blobmsg_parse: ... (0)
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crash-333757b203a44751d3535f24b05f467183a96d09: blobmsg_parse_array: ... (0)
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crash-333757b203a44751d3535f24b05f467183a96d09: blobmsg_parse: ... (0)
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crash-333757b203a44751d3535f24b05f467183a96d09: blobmsg_parse_array: ... (0)
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crash-4c4d2c3c9ade5da9347534e290305c3b9760f627: blobmsg_parse: ... (-1)
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crash-4c4d2c3c9ade5da9347534e290305c3b9760f627: blobmsg_parse_array: ... (-1)
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crash-4c4d2c3c9ade5da9347534e290305c3b9760f627: blobmsg_parse: ... (-1)
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crash-4c4d2c3c9ade5da9347534e290305c3b9760f627: blobmsg_parse_array: ... (-1)
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crash-5e9937b197c88bf4e7b7ee2612456cad4cb83f5b: blobmsg_parse: ... (-1)
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crash-5e9937b197c88bf4e7b7ee2612456cad4cb83f5b: blobmsg_parse_array: ... (-1)
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crash-5e9937b197c88bf4e7b7ee2612456cad4cb83f5b: blobmsg_parse: ... (-1)
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crash-5e9937b197c88bf4e7b7ee2612456cad4cb83f5b: blobmsg_parse_array: ... (-1)
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crash-75b146c4e6fac64d3e62236b27c64b50657bab2a: blobmsg_parse: ... (-1)
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crash-75b146c4e6fac64d3e62236b27c64b50657bab2a: blobmsg_parse_array: ... (-1)
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crash-75b146c4e6fac64d3e62236b27c64b50657bab2a: blobmsg_parse: ... (-1)
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crash-75b146c4e6fac64d3e62236b27c64b50657bab2a: blobmsg_parse_array: ... (-1)
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crash-813f3e68661da09c26d4a87dbb9d5099e92be50f: blobmsg_parse: ... (-1)
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crash-813f3e68661da09c26d4a87dbb9d5099e92be50f: blobmsg_parse_array: ... (-1)
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crash-813f3e68661da09c26d4a87dbb9d5099e92be50f: blobmsg_parse: ... (-1)
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crash-813f3e68661da09c26d4a87dbb9d5099e92be50f: blobmsg_parse_array: ... (-1)
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crash-98595faa58ba01d85ba4fd0b109cd3d490b45795: blobmsg_parse: ... (0)
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crash-98595faa58ba01d85ba4fd0b109cd3d490b45795: blobmsg_parse_array: ... (0)
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crash-98595faa58ba01d85ba4fd0b109cd3d490b45795: blobmsg_parse: ... (0)
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crash-98595faa58ba01d85ba4fd0b109cd3d490b45795: blobmsg_parse_array: ... (0)
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crash-a3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse: ... (-1)
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crash-a3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse_array: ... (-1)
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crash-a3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse: ... (-1)
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crash-a3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse_array: ... (-1)
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crash-b3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse: ... (-1)
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crash-b3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse_array: ... (-1)
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crash-b3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse: ... (-1)
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crash-b3585b70f1c7ffbdec10f6dadc964336118485c4: blobmsg_parse_array: ... (-1)
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crash-d0f3aa7d60a094b021f635d4edb7807c055a4ea1: blobmsg_parse: ... (0)
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crash-d0f3aa7d60a094b021f635d4edb7807c055a4ea1: blobmsg_parse_array: ... (0)
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crash-d0f3aa7d60a094b021f635d4edb7807c055a4ea1: blobmsg_parse: ... (0)
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crash-d0f3aa7d60a094b021f635d4edb7807c055a4ea1: blobmsg_parse_array: ... (0)
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crash-df9d1243057b27bbad6211e5a23d1cb699028aa2: blobmsg_parse: ... (-1)
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crash-df9d1243057b27bbad6211e5a23d1cb699028aa2: blobmsg_parse_array: ... (0)
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crash-df9d1243057b27bbad6211e5a23d1cb699028aa2: blobmsg_parse: ... (-1)
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crash-df9d1243057b27bbad6211e5a23d1cb699028aa2: blobmsg_parse_array: ... (0)
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crash-e2fd5ecb3b37926743256f1083f47a07c39e10c2: blobmsg_parse: ... (-1)
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crash-e2fd5ecb3b37926743256f1083f47a07c39e10c2: blobmsg_parse_array: ... (-1)
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crash-e2fd5ecb3b37926743256f1083f47a07c39e10c2: blobmsg_parse: ... (-1)
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crash-e2fd5ecb3b37926743256f1083f47a07c39e10c2: blobmsg_parse_array: ... (-1)
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valid-blobmsg.bin: blobmsg_parse: MLT (0)
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valid-blobmsg.bin: blobmsg_parse_array: MLT (0)
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valid-blobmsg.bin: blobmsg_parse: MLT (0)
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valid-blobmsg.bin: blobmsg_parse_array: MLT (0)
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