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| author | Breno Leitao <leitao@debian.org> | 2026-01-28 10:16:11 -0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:21:21 -0500 |
| commit | 4ce27e86d641cafab11df1078c3eb84539f13395 (patch) | |
| tree | 04e754773d2517f6dc8e73717a60f49cf41e0f10 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 956d54e07ca7788ffcbcf1e5bc947665a17dd844 (diff) | |
| download | kernel-4ce27e86d641cafab11df1078c3eb84539f13395.tar.gz | |
uprobes: Fix incorrect lockdep condition in filter_chain()
[ Upstream commit a56a38fd9196fc89401e498d70b7aa9c9679fa6e ]
The list_for_each_entry_rcu() in filter_chain() uses
rcu_read_lock_trace_held() as the lockdep condition, but the function
holds consumer_rwsem, not the RCU trace lock.
This gives me the following output when running with some locking debug
option enabled:
kernel/events/uprobes.c:1141 RCU-list traversed in non-reader section!!
filter_chain
register_for_each_vma
uprobe_unregister_nosync
__probe_event_disable
Remove the incorrect lockdep condition since the rwsem provides
sufficient protection for the list traversal.
Fixes: cc01bd044e6a ("uprobes: travers uprobe's consumer list locklessly under SRCU protection")
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260128-uprobe_rcu-v2-1-994ea6d32730@debian.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions
