diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-10-18 15:24:51 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-10-20 03:28:52 +0300 |
| commit | ff2f5ec5d009844ec28f171123f9e58750cef4bf (patch) | |
| tree | 9dd6bd7596db03e34bb1fa379bd600657dd17621 | |
| parent | 258ad2fe5ede773625adfda88b173f4123e59f45 (diff) | |
| download | linux-ff2f5ec5d009844ec28f171123f9e58750cef4bf.tar.xz | |
net: hns: fix possible memory leak in hnae_ae_register()
Inject fault while probing module, if device_register() fails,
but the refcount of kobject is not decreased to 0, the name
allocated in dev_set_name() is leaked. Fix this by calling
put_device(), so that name can be freed in callback function
kobject_cleanup().
unreferenced object 0xffff00c01aba2100 (size 128):
comm "systemd-udevd", pid 1259, jiffies 4294903284 (age 294.152s)
hex dump (first 32 bytes):
68 6e 61 65 30 00 00 00 18 21 ba 1a c0 00 ff ff hnae0....!......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<0000000034783f26>] slab_post_alloc_hook+0xa0/0x3e0
[<00000000748188f2>] __kmem_cache_alloc_node+0x164/0x2b0
[<00000000ab0743e8>] __kmalloc_node_track_caller+0x6c/0x390
[<000000006c0ffb13>] kvasprintf+0x8c/0x118
[<00000000fa27bfe1>] kvasprintf_const+0x60/0xc8
[<0000000083e10ed7>] kobject_set_name_vargs+0x3c/0xc0
[<000000000b87affc>] dev_set_name+0x7c/0xa0
[<000000003fd8fe26>] hnae_ae_register+0xcc/0x190 [hnae]
[<00000000fe97edc9>] hns_dsaf_ae_init+0x9c/0x108 [hns_dsaf]
[<00000000c36ff1eb>] hns_dsaf_probe+0x548/0x748 [hns_dsaf]
Fixes: 6fe6611ff275 ("net: add Hisilicon Network Subsystem hnae framework support")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20221018122451.1749171-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hns/hnae.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.c b/drivers/net/ethernet/hisilicon/hns/hnae.c index 00fafc0f8512..430eccea8e5e 100644 --- a/drivers/net/ethernet/hisilicon/hns/hnae.c +++ b/drivers/net/ethernet/hisilicon/hns/hnae.c @@ -419,8 +419,10 @@ int hnae_ae_register(struct hnae_ae_dev *hdev, struct module *owner) hdev->cls_dev.release = hnae_release; (void)dev_set_name(&hdev->cls_dev, "hnae%d", hdev->id); ret = device_register(&hdev->cls_dev); - if (ret) + if (ret) { + put_device(&hdev->cls_dev); return ret; + } __module_get(THIS_MODULE); |