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| author | Eduard Zingerman <eddyz87@gmail.com> | 2023-02-15 01:20:30 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-02-15 11:48:48 -0800 |
| commit | 2a33c5a25ef4fb574e6744fe7636956b124ad78f (patch) | |
| tree | 5ee57d8c70a3bc9f1b7ff3231b30d09edecfbd1f /kernel/bpf/memalloc.c | |
| parent | 31ff2135121ca9c0fd6c60de6b851509a24446ab (diff) | |
selftests/bpf: check if BPF_ST with variable offset preserves STACK_ZERO
A test case to verify that variable offset BPF_ST instruction
preserves STACK_ZERO marks when writes zeros, e.g. in the following
situation:
*(u64*)(r10 - 8) = 0 ; STACK_ZERO marks for fp[-8]
r0 = random(-7, -1) ; some random number in range of [-7, -1]
r0 += r10 ; r0 is now variable offset pointer to stack
*(u8*)(r0) = 0 ; BPF_ST writing zero, STACK_ZERO mark for
; fp[-8] should be preserved.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230214232030.1502829-5-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/memalloc.c')
0 files changed, 0 insertions, 0 deletions