From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 562433546CD for ; Fri, 4 Sep 2026 13:18:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788527904; cv=none; b=eDx5WpASXBE1UqYgptkWBUBJ5FJWGdUPQfVcRUNiAdFZb8FnI1v6NJ7SJtmE0G39BM/9qzmmEewE5bPsvQOadpjFkVNwsOvIoRxFPttQMPJ2wi+AcH5M/Lz0WCjmENo4AIeGv/bsloVQGJOGN0rP/l+yeqB/bSr5RoOAkrfW5NM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788527904; c=relaxed/simple; bh=nNz3tl0b5mrLYgGRMPZCcKXFOxkTBtbcMPiWmCFbY8c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ULy5nhKXmOmnvIhQmpXfB0l41IkmN+b7pQfDcvAfV3O4zFM6lahF+FXBqdJq601zABnxE8wqkFKjm+OJAqUotPNUMo7vS5i3ot531jWa/XdW0tW+xmAACqLpk9ROBSfqzOnrzjI6ESOXGXt57Hfj/MVnwqzqBflUAXTFBQU4e8U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HtnBkMVP; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HtnBkMVP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B90D41F00ACF; Fri, 4 Sep 2026 13:18:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788527896; bh=SjVTq2e3gZskhHV0vgkwvHynKGl1qLJthb5da25Ip9k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=HtnBkMVPfBkumE9CscvIjh1iphldffaY4nqPP2aq/WIe3aK+Qb1Wb5oHj27PASxIq QGw63UfTfUDDUfgZdzRk4AUuu/SsMo9vccpvjEP9vS1nSKdHpfz9hzIwiQOLtcmoQp 7JnDC1G6i5a996vkuzA3CnFDzLPa3o+LMY9QrliqooK4BjNqLbOW7lVVbXQJFRtxIB pBZ5yVArB0I5/Mz2kBdJlb3wmvtkXAns7thF3hrA+mcXfF73+6Zoz3mAU+ta0S0yND aFM5LZIlxL4nQwYcjdIyyJTdsHbIjkaA+OzT7KKsA2I9AFP9Gwjze6XqClC6DDGD9h VbhT/+/ZGOq2g== From: Sasha Levin To: stable@vger.kernel.org Cc: Vincent Donnefort , "Masami Hiramatsu (Google)" , Steven Rostedt , Sasha Levin Subject: [PATCH 6.6.y 2/2] tracing: Fix logged instance name on creation failure Date: Fri, 4 Sep 2026 09:18:13 -0400 Message-ID: <20260904131813.503518-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260904131813.503518-1-sashal@kernel.org> References: <2026090305-creole-floral-cc49@gregkh> <20260904131813.503518-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Vincent Donnefort [ Upstream commit a9a01be2834a529cbd490ccbab02643f0c1735f2 ] When boot instance creation fails, the kernel incorrectly logs "(null)" as the instance name because strsep() consumes curr_str entirely during parsing. Print the properly parsed name variable instead. And while at it log the error code. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260807085423.4175161-1-vdonnefort@google.com Fixes: cb1f98c5e574 ("tracing: Add creation of instances at boot command line") Acked-by: Masami Hiramatsu (Google) Signed-off-by: Vincent Donnefort Signed-off-by: Steven Rostedt Signed-off-by: Sasha Levin --- kernel/trace/trace.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 61e7c857a4652..535e47b5c40ad 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -10326,7 +10326,8 @@ __init static void enable_instances(void) tr = trace_array_create_systems(name, NULL, addr, size); if (IS_ERR(tr)) { - pr_warn("Tracing: Failed to create instance buffer %s\n", curr_str); + pr_warn("Tracing: Failed to create instance buffer '%s' (%ld)\n", name, + PTR_ERR(tr)); continue; } -- 2.53.0