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| author | Hou Tao <houtao1@huawei.com> | 2023-12-15 18:07:06 +0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-12-15 22:54:55 +0100 |
| commit | 0d83786f5661154d015b498a3d23d4c37e30f6ef (patch) | |
| tree | d118f6335c36c98b0517901f93ee471125ee8bdc /tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c | |
| parent | d6d1e6c17cab2dcb7b8530c599f00e7de906d380 (diff) | |
| download | linux-0d83786f5661154d015b498a3d23d4c37e30f6ef.tar.gz linux-0d83786f5661154d015b498a3d23d4c37e30f6ef.tar.bz2 linux-0d83786f5661154d015b498a3d23d4c37e30f6ef.zip | |
selftests/bpf: Add test for abnormal cnt during multi-uprobe attachment
If an abnormally huge cnt is used for multi-uprobes attachment, the
following warning will be reported:
------------[ cut here ]------------
WARNING: CPU: 7 PID: 406 at mm/util.c:632 kvmalloc_node+0xd9/0xe0
Modules linked in: bpf_testmod(O)
CPU: 7 PID: 406 Comm: test_progs Tainted: G ...... 6.7.0-rc3+ #32
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ......
RIP: 0010:kvmalloc_node+0xd9/0xe0
......
Call Trace:
<TASK>
? __warn+0x89/0x150
? kvmalloc_node+0xd9/0xe0
bpf_uprobe_multi_link_attach+0x14a/0x480
__sys_bpf+0x14a9/0x2bc0
do_syscall_64+0x36/0xb0
entry_SYSCALL_64_after_hwframe+0x6e/0x76
......
</TASK>
---[ end trace 0000000000000000 ]---
So add a test to ensure the warning is fixed.
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20231215100708.2265609-4-houtao@huaweicloud.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c')
0 files changed, 0 insertions, 0 deletions