From: Hou Tao <houtao1@xxxxxxxxxx>
Hi,
The patch set aims to fix the warnings in kvmalloc_node() when passing
an abnormally big cnt during multiple kprobes/uprobes attachment.
Patch #1 and #2 fix the warning by limiting the maximal number of
uprobes/kprobes. Patch #3 and #4 add tests to ensure these warnings are
fixed.
Please see individual patches for more details. Comments are always
welcome.
Change Log:
v2:
* limit the number of uprobes/kprobes instead of suppressing the
out-of-memory warning message (Alexei)
* provide a faked non-zero offsets to simplify the multiple uprobe
test (Jiri)
v1: https://lore.kernel.org/bpf/20231211112843.4147157-1-houtao@xxxxxxxxxxxxxxx/
Hou Tao (4):
bpf: Limit the number of uprobes when attaching program to multiple
uprobes
bpf: Limit the number of kprobes when attaching program to multiple
kprobes
selftests/bpf: Add test for abnormal cnt during multi-uprobe
attachment
selftests/bpf: Add test for abnormal cnt during multi-kprobe
attachment
kernel/trace/bpf_trace.c | 7 ++--
.../bpf/prog_tests/kprobe_multi_test.c | 14 ++++++++
.../bpf/prog_tests/uprobe_multi_test.c | 33 ++++++++++++++++++-
3 files changed, 51 insertions(+), 3 deletions(-)
--
2.29.2
