forked from Minki/linux
drm/dp: Don't trust drm_dp_downstream_id()
Before we interpret drm_dp_downstream_id() as a string, make sure it is NULL terminated, even when drm_dp_downtsream_id() fails. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101660 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170720174532.23377-2-chris@chris-wilson.co.uk
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@ -544,7 +544,7 @@ void drm_dp_downstream_debug(struct seq_file *m,
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DP_DETAILED_CAP_INFO_AVAILABLE;
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int clk;
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int bpc;
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char id[6];
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char id[7];
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int len;
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uint8_t rev[2];
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int type = port_cap[0] & DP_DS_PORT_TYPE_MASK;
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@ -583,6 +583,7 @@ void drm_dp_downstream_debug(struct seq_file *m,
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seq_puts(m, "\t\tType: N/A\n");
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}
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memset(id, 0, sizeof(id));
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drm_dp_downstream_id(aux, id);
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seq_printf(m, "\t\tID: %s\n", id);
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