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| author | Aditya Pakki <pakki001@umn.edu> | 2019-03-20 10:57:54 -0500 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-03-22 13:23:31 +0300 |
| commit | 2cc12751cf464a722ff57b54d17d30c84553f9c0 (patch) | |
| tree | 9a72d0caf356d9f6ebc7a32f57d752fd631e2699 /drivers/thunderbolt | |
| parent | e4dfdd5804cce1255f99c5dd033526a18135a616 (diff) | |
| download | linux-2cc12751cf464a722ff57b54d17d30c84553f9c0.tar.gz linux-2cc12751cf464a722ff57b54d17d30c84553f9c0.tar.bz2 linux-2cc12751cf464a722ff57b54d17d30c84553f9c0.zip | |
thunderbolt: Fix to check for kmemdup failure
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@umn.edu>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index cd96994dc094..504365d46827 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1294,13 +1294,14 @@ 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 @@ -1308,7 +1309,9 @@ 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 @@ -1323,6 +1326,9 @@ 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) @@ -1372,7 +1378,9 @@ 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); } @@ -1422,7 +1430,9 @@ 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) { |