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telit: fix segmentation fault in initialize_alternate_3g_band

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Fix the following segmentation fault:

ModemManager[128007]: mm_port_peek_kernel_device: assertion 'MM_IS_PORT (self)' failed

Thread 1 "ModemManager" received signal SIGSEGV, Segmentation fault.
0x00005555556c6e3e in mm_kernel_device_get_global_property
(self=0x0, property=0x7ffff5947480 "ID_MM_TELIT_BND_ALTERNATE")
at kerneldevice/mm-kernel-device.c:309

Reported by Carlo Lobrano <c.lobrano@gmail.com>
This commit is contained in:
Daniele Palmas
2021-10-08 11:42:04 +02:00
committed by Aleksander Morgado
parent 176b3f53c2
commit 41482d823b
1 changed files with 7 additions and 5 deletions
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12
plugins/telit/mm-shared-telit.c
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@@ -58,12 +58,14 @@ initialize_alternate_3g_band (MMSharedTelit *self,
MMKernelDevice *port;
primary = MM_PORT (mm_base_modem_peek_port_primary (MM_BASE_MODEM (self)));
port = mm_port_peek_kernel_device (primary);
if (primary) {
port = mm_port_peek_kernel_device (primary);
/* Lookup for the tag specifying that we're using the alternate 3G band mapping */
priv->alternate_3g_bands = mm_kernel_device_get_global_property_as_boolean (port, "ID_MM_TELIT_BND_ALTERNATE");
if (priv->alternate_3g_bands)
mm_obj_dbg (self, "telit modem using alternate 3G band mask setup");
/* Lookup for the tag specifying that we're using the alternate 3G band mapping */
priv->alternate_3g_bands = mm_kernel_device_get_global_property_as_boolean (port, "ID_MM_TELIT_BND_ALTERNATE");
if (priv->alternate_3g_bands)
mm_obj_dbg (self, "telit modem using alternate 3G band mask setup");
}
}
static Private *