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711aef1bbf
The current method to compare 64-bit numbers for conditional jump is: 1) Compare the high 32-bit first. 2) If the high 32-bit isn't the same, then goto step 4. 3) Compare the low 32-bit. 4) Check the desired condition. This method is right for unsigned comparison, but it is buggy for signed comparison, because it does signed comparison for low 32-bit too. There is only one sign bit in 64-bit number, that is the MSB in the 64-bit number, it is wrong to treat low 32-bit as signed number and do the signed comparison for it. This patch fixes the bug and adds a testcase in selftests/bpf for such bug. Signed-off-by: Wang YanQing <udknight@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> |
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| hv | ||
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| laptop | ||
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| lib | ||
| memory-model | ||
| nfsd | ||
| objtool | ||
| pci | ||
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| perf | ||
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| testing | ||
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