kernel/tools/testing/selftests/bpf/verifier/var_off.c, branch linux-6.2.y

selftests/bpf: Fix spelling mistake "unpriviledged" -> "unprivileged"

2022-09-30T22:08:05Z

There are a couple of spelling mistakes, one in a literal string and one in a comment. Fix them. Signed-off-by: Colin Ian King Signed-off-by: Andrii Nakryiko Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20220928221555.67873-1-colin.i.king@gmail.com

bpf: Small BPF verifier log improvements

2022-03-03T15:54:10Z

In particular these include: 1) Remove output of inv for scalars in print_verifier_state 2) Replace inv with scalar in verifier error messages 3) Remove _value suffixes for umin/umax/s32_min/etc (except map_value) 4) Remove output of id=0 5) Remove output of ref_obj_id=0 Signed-off-by: Mykola Lysenko Signed-off-by: Daniel Borkmann Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220301222745.1667206-1-mykolal@fb.com

selftest/bpf: Verifier tests for var-off access

2021-02-10T18:44:19Z

Add tests for the new functionality - reading and writing to the stack through a variable-offset pointer. Signed-off-by: Andrei Matei Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20210207011027.676572-4-andreimatei1@gmail.com

selftest/bpf: Adjust expected verifier errors

2021-02-10T18:44:19Z

The verifier errors around stack accesses have changed slightly in the previous commit (generally for the better). Signed-off-by: Andrei Matei Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20210207011027.676572-3-andreimatei1@gmail.com

selftests/bpf: Test unbounded var_off stack access

2019-04-05T14:50:08Z

Test the case when reg->smax_value is too small/big and can overflow, and separately min and max values outside of stack bounds. Example of output: # ./test_verifier #856/p indirect variable-offset stack access, unbounded OK #857/p indirect variable-offset stack access, max out of bound OK #858/p indirect variable-offset stack access, min out of bound OK Signed-off-by: Andrey Ignatov Signed-off-by: Daniel Borkmann

selftests/bpf: Test indirect var_off stack access in unpriv mode

2019-04-05T14:50:08Z

Test that verifier rejects indirect stack access with variable offset in unprivileged mode and accepts same code in privileged mode. Since pointer arithmetics is prohibited in unprivileged mode verifier should reject the program even before it gets to helper call that uses variable offset, at the time when that variable offset is trying to be constructed. Example of output: # ./test_verifier ... #859/u indirect variable-offset stack access, priv vs unpriv OK #859/p indirect variable-offset stack access, priv vs unpriv OK Signed-off-by: Andrey Ignatov Signed-off-by: Daniel Borkmann

selftests/bpf: Test indirect var_off stack access in raw mode

2019-04-05T14:50:07Z

Test that verifier rejects indirect access to uninitialized stack with variable offset. Example of output: # ./test_verifier ... #859/p indirect variable-offset stack access, uninitialized OK Signed-off-by: Andrey Ignatov Signed-off-by: Daniel Borkmann

selftests/bpf: Test variable offset stack access

2019-03-29T19:05:35Z

Test different scenarios of indirect variable-offset stack access: out of bound access (>0), min_off below initialized part of the stack, max_off+size above initialized part of the stack, initialized stack. Example of output: ... #856/p indirect variable-offset stack access, out of bound OK #857/p indirect variable-offset stack access, max_off+size > max_initialized OK #858/p indirect variable-offset stack access, min_off < min_initialized OK #859/p indirect variable-offset stack access, ok OK ... Signed-off-by: Andrey Ignatov Signed-off-by: Alexei Starovoitov

selftests: bpf: break up test_verifier

2019-01-28T05:37:45Z

Break up the first 10 kLoC of test verifier test cases out into smaller files. Looks like git line counting gets a little flismy above 16 bit integers, so we need two commits to break up test_verifier. Signed-off-by: Jakub Kicinski Acked-by: Jiong Wang Signed-off-by: Alexei Starovoitov