Alexei Starovoitov b9979db834 bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off. ... Before this fix: 166: (b5) if r2 <= 0x1 goto pc+22 from 166 to 189: R2=invP(id=1,umax_value=1,var_off=(0x0; 0xffffffff)) After this fix: 166: (b5) if r2 <= 0x1 goto pc+22 from 166 to 189: R2=invP(id=1,umax_value=1,var_off=(0x0; 0x1)) While processing BPF_JLE the reg_set_min_max() would set true_reg->umax_value = 1 and call __reg_combine_64_into_32(true_reg). Without the fix it would not pass the condition: if (__reg64_bound_u32(reg->umin_value) && __reg64_bound_u32(reg->umax_value)) since umin_value == 0 at this point. Before commit 10bf4e8316 the umin was incorrectly ingored. The commit 10bf4e8316 fixed the correctness issue, but pessimized propagation of 64-bit min max into 32-bit min max and corresponding var_off. Fixes: 10bf4e8316 ("bpf: Fix propagation of 32 bit unsigned bounds from 64 bit bounds") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20211101222153.78759-1-alexei.starovoitov@gmail.com		2021-11-01 18:05:11 -07:00
..
fault-injection
ktest	bootconfig/tracing/ktest: Update ktest example for boot-time tracing	2021-08-16 11:39:51 -04:00
kunit	kunit: Print test statistics on failure	2021-08-13 13:38:31 -06:00
nvdimm	tools/testing/nvdimm: Fix missing 'fallthrough' warning	2021-08-11 11:55:54 -07:00
radix-tree	idr test suite: Improve reporting from idr_find_test_1	2021-04-01 07:50:42 -04:00
scatterlist	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
selftests	bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off.	2021-11-01 18:05:11 -07:00
vsock	vsock_test: update message bounds test for MSG_EOR	2021-09-06 02:25:16 -04:00