net/sixlowpan: Check if g_frame_hdrlen + IPv6_HDRLEN <= iob->io_len#18857
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acassis wants to merge 2 commits intoapache:masterfrom
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net/sixlowpan: Check if g_frame_hdrlen + IPv6_HDRLEN <= iob->io_len#18857acassis wants to merge 2 commits intoapache:masterfrom
acassis wants to merge 2 commits intoapache:masterfrom
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This commit checks if the incoming 6LoWPAN frame header len + the IPv6_HDRLEN will fit inside the b->io_len. Signed-off-by: Alan C. Assis <acassis@gmail.com>
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cederom
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May 8, 2026
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@cederom endofframe is where the received data ends, so the test verifies if this position is lesser than the header len. It is confuse to understand if you don't spend some time looking the code |
There was another small issue on sixlowpan_input.c code, it was processing protosize and 8-bit instead of 16-bit. It was working because the max tcp->tcpoffset was 0xf0, so protosize = ((uint16_t)tcp->tcpoffset >> 4) << 2; Will be protosize = 15 * 4 = 60 and will fit inside 8-bit. Signed-off-by: Alan C. Assis <acassis@gmail.com>
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linguini1
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Summary
Fix another issue where g_frame_hdrlen is not checked correctly
Impact
Improvement
Testing
$ ./tools/configure.sh b-l475e-iot01a:spirit-6lowpan