2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 12:43:55 +08:00
linux-next/arch/arm64/net
Xi Wang 1e4df6b720 arm64: bpf: fix signedness bug in loading 64-bit immediate
Consider "(u64)insn1.imm << 32 | imm" in the arm64 JIT.  Since imm is
signed 32-bit, it is sign-extended to 64-bit, losing the high 32 bits.
The fix is to convert imm to u32 first, which will be zero-extended to
u64 implicitly.

Cc: Zi Shen Lim <zlim.lnx@gmail.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>
Fixes: 30d3d94cc3 ("arm64: bpf: add 'load 64-bit immediate' instruction")
Signed-off-by: Xi Wang <xi.wang@gmail.com>
[will: removed non-arm64 bits and redundant casting]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-05-08 16:15:07 +01:00
..
bpf_jit_comp.c arm64: bpf: fix signedness bug in loading 64-bit immediate 2015-05-08 16:15:07 +01:00
bpf_jit.h arm64: bpf: add 'shift by register' instructions 2014-10-20 17:47:03 +01:00
Makefile arm64: eBPF JIT compiler 2014-09-08 14:39:21 +01:00