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| author |   Colin Ian King <colin.i.king@gmail.com> | 2025-04-22 23:13:35 +0100 |
|---|---|---|
| committer |   Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-05-01 15:46:19 -0400 |
| commit | 3c1d9cfa8458a4d6b6cd9bc3ca7bb1591130a31c (patch) | |
| tree | e136e9e06563f785c7dd7470c8ed2ad32c35dffc | |
| parent | tracing: Fix oob write in trace_seq_to_buffer() (diff) | |
| download | wireguard-linux-3c1d9cfa8458a4d6b6cd9bc3ca7bb1591130a31c.tar.xz wireguard-linux-3c1d9cfa8458a4d6b6cd9bc3ca7bb1591130a31c.zip | |
ftrace: Fix NULL memory allocation check
The check for a failed memory location is incorrectly checking
the wrong level of pointer indirection by checking !filter_hash
rather than !*filter_hash. Fix this.
Cc: asami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20250422221335.89896-1-colin.i.king@gmail.com
Fixes: 0ae6b8ce200d ("ftrace: Fix accounting of subop hashes")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/trace/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 61130bb34d6c..6981830c3128 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3436,7 +3436,7 @@ static int add_next_hash(struct ftrace_hash **filter_hash, struct ftrace_hash ** /* Copy the subops hash */ *filter_hash = alloc_and_copy_ftrace_hash(size_bits, subops_hash->filter_hash); - if (!filter_hash) + if (!*filter_hash) return -ENOMEM; /* Remove any notrace functions from the copy */ remove_hash(*filter_hash, subops_hash->notrace_hash); |