Description
In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Zero-extend signed ALU32 div/mod results ALU32 operations write a 32-bit result and leave the upper 32 bits of the BPF register zero. The LoongArch JIT sign-extends the result of signed ALU32 BPF_DIV and BPF_MOD (off=1), so a negative 32-bit quotient or remainder leaves bits 63:32 set in JITted code while the verifier and interpreter model those bits as zero. Keep sign-extension on the operands, which signed divide needs, and zero-extend the ALU32 result after the divide or modulo instruction, matching the unsigned ALU32 div/mod paths and every other ALU32 operation in this JIT.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2425c9e002d2a1fdca34261b2fa6713eafef2163 to < 7577cca85f2d4590c9d9423ba72ef54181a713c9affected2425c9e002d2a1fdca34261b2fa6713eafef2163 to < 16656c3d734693be3d8a36dbf9d09142b69f3ddcaffected2425c9e002d2a1fdca34261b2fa6713eafef2163 to < 716cb29dbed4d62e9e108950a1a82bcba4cc2d45affected2425c9e002d2a1fdca34261b2fa6713eafef2163 to < dacd348b8a993373576fe2ee2d8b114740ba57a6affected
Linux Linux
Default version status: affected
6.7affected0 to < 6.7unaffected6.12.114 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected