tracing: Fix allocation of printing set_event file content
authorSteven Rostedt <rostedt@goodmis.org>
Tue, 21 Jan 2025 20:12:36 +0000 (15:12 -0500)
committerSteven Rostedt (Google) <rostedt@goodmis.org>
Tue, 21 Jan 2025 20:22:41 +0000 (15:22 -0500)
commitf95ee542947d748d4ca01b4d3103dbdc4fdc8889
treeeccd1d9949f1af3b7868cf8e18d99b818ac423f0
parent22412b72cafd1b2570c2f9f14b7a133bdff8b80c
tracing: Fix allocation of printing set_event file content

The adding of cached events for modules not loaded yet required a
descriptor to separate the iteration of events with the iteration of
cached events for a module. But the allocation used the size of the
pointer and not the size of the contents to allocate its data and caused a
slab-out-of-bounds.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/20250121151236.47fcf433@gandalf.local.home
Reported-by: Sasha Levin <sashal@kernel.org>
Closes: https://lore.kernel.org/all/Z4_OHKESRSiJcr-b@lappy/
Fixes: b355247df104e ("tracing: Cache ":mod:" events for modules not loaded yet")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
kernel/trace/trace_events.c