From: Vladimir Oltean vladimir.oltean@nxp.com
[ Upstream commit e095493091e850d5292ad01d8fbf5cde1d89ac53 ]
If dsa_tag_8021q_setup() fails, for example due to the inability of the device to install a VLAN, the tag_8021q context of the switch will leak. Make sure it is freed on the error path.
Fixes: 328621f6131f ("net: dsa: tag_8021q: absorb dsa_8021q_setup into dsa_tag_8021q_{,un}register") Signed-off-by: Vladimir Oltean vladimir.oltean@nxp.com Link: https://lore.kernel.org/r/20221209235242.480344-1-vladimir.oltean@nxp.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/dsa/tag_8021q.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c index 01a427800797..6de53f5b40a7 100644 --- a/net/dsa/tag_8021q.c +++ b/net/dsa/tag_8021q.c @@ -400,6 +400,7 @@ static void dsa_tag_8021q_teardown(struct dsa_switch *ds) int dsa_tag_8021q_register(struct dsa_switch *ds, __be16 proto) { struct dsa_8021q_context *ctx; + int err;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); if (!ctx) @@ -412,7 +413,15 @@ int dsa_tag_8021q_register(struct dsa_switch *ds, __be16 proto)
ds->tag_8021q_ctx = ctx;
- return dsa_tag_8021q_setup(ds); + err = dsa_tag_8021q_setup(ds); + if (err) + goto err_free; + + return 0; + +err_free: + kfree(ctx); + return err; } EXPORT_SYMBOL_GPL(dsa_tag_8021q_register);