Re: [PATCH v3] thunderbolt: Fix to check the return value of kmemdup
On Mon, Mar 25, 2019 at 04:25:22PM -0500, Aditya Pakki wrote: > uuid in add_switch is allocted via kmemdup which can fail. The patch > logs the error and cleans up the allocated memory for switch. > > Signed-off-by: Aditya Pakki Applied, thanks!
Re: [PATCH v3] thunderbolt: Fix to check the return value of kmemdup
On 3/26/2019 2:55 AM, Aditya Pakki wrote: uuid in add_switch is allocted via kmemdup which can fail. The patch logs the error and cleans up the allocated memory for switch. Signed-off-by: Aditya Pakki Reviewed-by: Mukesh Ojha -Mukesh --- v2: replace WARN_ONCE with tb_sw_warn, as suggested by Mika v1: Change warn_once to return after clean up. --- drivers/thunderbolt/icm.c | 5 + 1 file changed, 5 insertions(+) diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index e3fc920af682..8b7f9131e9d1 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -473,6 +473,11 @@ static void add_switch(struct tb_switch *parent_sw, u64 route, goto out; sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL); + if (!sw->uuid) { + tb_sw_warn(sw, "cannot allocate memory for switch\n"); + tb_switch_put(sw); + goto out; + } sw->connection_id = connection_id; sw->connection_key = connection_key; sw->link = link;
[PATCH v3] thunderbolt: Fix to check the return value of kmemdup
uuid in add_switch is allocted via kmemdup which can fail. The patch logs the error and cleans up the allocated memory for switch. Signed-off-by: Aditya Pakki --- v2: replace WARN_ONCE with tb_sw_warn, as suggested by Mika v1: Change warn_once to return after clean up. --- drivers/thunderbolt/icm.c | 5 + 1 file changed, 5 insertions(+) diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index e3fc920af682..8b7f9131e9d1 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -473,6 +473,11 @@ static void add_switch(struct tb_switch *parent_sw, u64 route, goto out; sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL); + if (!sw->uuid) { + tb_sw_warn(sw, "cannot allocate memory for switch\n"); + tb_switch_put(sw); + goto out; + } sw->connection_id = connection_id; sw->connection_key = connection_key; sw->link = link; -- 2.17.1