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Date: Wed, 29 May 2019 20:05:25 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Aditya Pakki <pakki001@....edu>, Mukesh Ojha <mojha@...eaurora.org>, Mika Westerberg <mika.westerberg@...ux.intel.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.1 327/405] thunderbolt: Fix to check for kmemdup failure [ Upstream commit 2cc12751cf464a722ff57b54d17d30c84553f9c0 ] Memory allocated via kmemdup might fail and return a NULL pointer. This patch adds a check on the return value of kmemdup and passes the error upstream. Signed-off-by: Aditya Pakki <pakki001@....edu> Reviewed-by: Mukesh Ojha <mojha@...eaurora.org> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/thunderbolt/switch.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 32e012713dbeb..f569a2673742f 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1287,13 +1287,14 @@ int tb_switch_configure(struct tb_switch *sw) return tb_plug_events_active(sw, true); } -static void tb_switch_set_uuid(struct tb_switch *sw) +static int tb_switch_set_uuid(struct tb_switch *sw) { u32 uuid[4]; - int cap; + int cap, ret; + ret = 0; if (sw->uuid) - return; + return ret; /* * The newer controllers include fused UUID as part of link @@ -1301,7 +1302,9 @@ static void tb_switch_set_uuid(struct tb_switch *sw) */ cap = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER); if (cap > 0) { - tb_sw_read(sw, uuid, TB_CFG_SWITCH, cap + 3, 4); + ret = tb_sw_read(sw, uuid, TB_CFG_SWITCH, cap + 3, 4); + if (ret) + return ret; } else { /* * ICM generates UUID based on UID and fills the upper @@ -1316,6 +1319,9 @@ static void tb_switch_set_uuid(struct tb_switch *sw) } sw->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL); + if (!sw->uuid) + ret = -ENOMEM; + return ret; } static int tb_switch_add_dma_port(struct tb_switch *sw) @@ -1365,7 +1371,9 @@ static int tb_switch_add_dma_port(struct tb_switch *sw) if (status) { tb_sw_info(sw, "switch flash authentication failed\n"); - tb_switch_set_uuid(sw); + ret = tb_switch_set_uuid(sw); + if (ret) + return ret; nvm_set_auth_status(sw, status); } @@ -1415,7 +1423,9 @@ int tb_switch_add(struct tb_switch *sw) } tb_sw_dbg(sw, "uid: %#llx\n", sw->uid); - tb_switch_set_uuid(sw); + ret = tb_switch_set_uuid(sw); + if (ret) + return ret; for (i = 0; i <= sw->config.max_port_number; i++) { if (sw->ports[i].disabled) { -- 2.20.1
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