diff options
| author | Breno Leitao <leitao@debian.org> | 2026-01-28 10:16:11 -0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-02-02 22:01:07 +0100 |
| commit | a56a38fd9196fc89401e498d70b7aa9c9679fa6e (patch) | |
| tree | 8295405f231538eb717779a08f76a7f857f1472b /tools/include/uapi | |
| parent | 171efc70097a9f5f207461bed03478a1b0a3dfa6 (diff) | |
uprobes: Fix incorrect lockdep condition in filter_chain()
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
Diffstat (limited to 'tools/include/uapi')
0 files changed, 0 insertions, 0 deletions