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From 59e7477c5a18ec4bcb1f9b1e20d2303b4e0cafb1 Mon Sep 17 00:00:00 2001
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From: Martin George <marting@netapp.com>
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Date: Thu, 5 Aug 2021 18:01:24 +0530
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Subject: [PATCH] nvme-print: fix 'nvme list' segfault if controller is
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unavailable
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Check if the controller is available before dereferencing the
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controller attributes.
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Signed-off-by: Martin George <marting@netapp.com>
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---
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nvme-print.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/nvme-print.c b/nvme-print.c
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index 8a2cbc4..0c0ec3b 100755
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--- a/nvme-print.c
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+++ b/nvme-print.c
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@@ -6147,6 +6147,9 @@ static void nvme_show_list_item(struct nvme_namespace *n)
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struct stat st;
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int ret;
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+ if (!n->ctrl)
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+ return;
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+
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sprintf(path, "%s%s", n->ctrl->path, n->name);
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ret = stat(path, &st);
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if (ret < 0)
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@@ -6203,6 +6206,9 @@ static void nvme_show_details_ns(struct nvme_namespace *n, bool ctrl)
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char usage[128];
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char format[128];
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+ if (!n->ctrl)
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+ return;
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+
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sprintf(usage,"%6.2f %2sB / %6.2f %2sB", nuse, u_suffix,
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nsze, s_suffix);
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sprintf(format,"%3.0f %2sB + %2d B", (double)lba, l_suffix,
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@@ -6419,6 +6425,9 @@ static void json_simple_ns(struct nvme_namespace *n, struct json_object *devices
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char *devnode;
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struct stat st;
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+ if (!n->ctrl)
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+ return;
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+
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if (asprintf(&devnode, "%s%s", n->ctrl->path, n->name) < 0)
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return;
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--
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2.27.0
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