Dismissed
(max. allowed matches exceeded)
Activity log
- Created & dismissed (max. allowed matches exceeded) suggestion
LoongArch: BPF: Zero-extend signed ALU32 div/mod results
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.
References
Affected products
Linux
- =<*
- <6.7
- ==6.7
- =<7.1.*
- <716cb29dbed4d62e9e108950a1a82bcba4cc2d45
- <dacd348b8a993373576fe2ee2d8b114740ba57a6