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author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2022-02-09 10:03:24 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-16 16:23:40 +0300 |
commit | b0028e1cc1faf2e5d88ad4065590aca90d650182 (patch) | |
tree | a70191f8878fac02ee125762a8b34e1de6800988 /tools/testing/selftests/bpf/prog_tests | |
parent | 732c7172b79ce0d39bc9c3aebbe38ba7dd14a265 (diff) | |
download | linux-b0028e1cc1faf2e5d88ad4065590aca90d650182.tar.xz |
selftests/bpf: Add test for bpf_timer overwriting crash
[ Upstream commit a7e75016a0753c24d6c995bc02501ae35368e333 ]
Add a test that validates that timer value is not overwritten when doing
a copy_map_value call in the kernel. Without the prior fix, this test
triggers a crash.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220209070324.1093182-3-memxor@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/timer_crash.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/timer_crash.c b/tools/testing/selftests/bpf/prog_tests/timer_crash.c new file mode 100644 index 000000000000..f74b82305da8 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/timer_crash.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include "timer_crash.skel.h" + +enum { + MODE_ARRAY, + MODE_HASH, +}; + +static void test_timer_crash_mode(int mode) +{ + struct timer_crash *skel; + + skel = timer_crash__open_and_load(); + if (!ASSERT_OK_PTR(skel, "timer_crash__open_and_load")) + return; + skel->bss->pid = getpid(); + skel->bss->crash_map = mode; + if (!ASSERT_OK(timer_crash__attach(skel), "timer_crash__attach")) + goto end; + usleep(1); +end: + timer_crash__destroy(skel); +} + +void test_timer_crash(void) +{ + if (test__start_subtest("array")) + test_timer_crash_mode(MODE_ARRAY); + if (test__start_subtest("hash")) + test_timer_crash_mode(MODE_HASH); +} |