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authorZhengchao Shao <shaozhengchao@huawei.com>2022-10-26 09:46:41 +0800
committerJakub Kicinski <kuba@kernel.org>2022-10-27 10:47:24 -0700
commit6b1da9f7126f05e857da6db24c6a04aa7974d644 (patch)
treec3b77c4df564ba34b12952b6baca8f9e50ba8968 /drivers/net/netdevsim
parentcf2010aa1c739bab067cbc90b690d28eaa0b47da (diff)
netdevsim: fix memory leak in nsim_drv_probe() when nsim_dev_resources_register() failed
If some items in nsim_dev_resources_register() fail, memory leak will occur. The following is the memory leak information. unreferenced object 0xffff888074c02600 (size 128): comm "echo", pid 8159, jiffies 4294945184 (age 493.530s) hex dump (first 32 bytes): 40 47 ea 89 ff ff ff ff 01 00 00 00 00 00 00 00 @G.............. ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ backtrace: [<0000000011a31c98>] kmalloc_trace+0x22/0x60 [<0000000027384c69>] devl_resource_register+0x144/0x4e0 [<00000000a16db248>] nsim_drv_probe+0x37a/0x1260 [<000000007d1f448c>] really_probe+0x20b/0xb10 [<00000000c416848a>] __driver_probe_device+0x1b3/0x4a0 [<00000000077e0351>] driver_probe_device+0x49/0x140 [<0000000054f2465a>] __device_attach_driver+0x18c/0x2a0 [<000000008538f359>] bus_for_each_drv+0x151/0x1d0 [<0000000038e09747>] __device_attach+0x1c9/0x4e0 [<00000000dd86e533>] bus_probe_device+0x1d5/0x280 [<00000000839bea35>] device_add+0xae0/0x1cb0 [<000000009c2abf46>] new_device_store+0x3b6/0x5f0 [<00000000fb823d7f>] bus_attr_store+0x72/0xa0 [<000000007acc4295>] sysfs_kf_write+0x106/0x160 [<000000005f50cb4d>] kernfs_fop_write_iter+0x3a8/0x5a0 [<0000000075eb41bf>] vfs_write+0x8f0/0xc80 Fixes: 37923ed6b8ce ("netdevsim: Add simple FIB resource controller via devlink") Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/netdevsim')
-rw-r--r--drivers/net/netdevsim/dev.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 794fc0cc73b8..81c3e14af063 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -442,7 +442,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
&params);
if (err) {
pr_err("Failed to register IPv4 top resource\n");
- goto out;
+ goto err_out;
}
err = devl_resource_register(devlink, "fib", (u64)-1,
@@ -450,7 +450,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
NSIM_RESOURCE_IPV4, &params);
if (err) {
pr_err("Failed to register IPv4 FIB resource\n");
- return err;
+ goto err_out;
}
err = devl_resource_register(devlink, "fib-rules", (u64)-1,
@@ -458,7 +458,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
NSIM_RESOURCE_IPV4, &params);
if (err) {
pr_err("Failed to register IPv4 FIB rules resource\n");
- return err;
+ goto err_out;
}
/* Resources for IPv6 */
@@ -468,7 +468,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
&params);
if (err) {
pr_err("Failed to register IPv6 top resource\n");
- goto out;
+ goto err_out;
}
err = devl_resource_register(devlink, "fib", (u64)-1,
@@ -476,7 +476,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
NSIM_RESOURCE_IPV6, &params);
if (err) {
pr_err("Failed to register IPv6 FIB resource\n");
- return err;
+ goto err_out;
}
err = devl_resource_register(devlink, "fib-rules", (u64)-1,
@@ -484,7 +484,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
NSIM_RESOURCE_IPV6, &params);
if (err) {
pr_err("Failed to register IPv6 FIB rules resource\n");
- return err;
+ goto err_out;
}
/* Resources for nexthops */
@@ -492,8 +492,14 @@ static int nsim_dev_resources_register(struct devlink *devlink)
NSIM_RESOURCE_NEXTHOPS,
DEVLINK_RESOURCE_ID_PARENT_TOP,
&params);
+ if (err) {
+ pr_err("Failed to register NEXTHOPS resource\n");
+ goto err_out;
+ }
+ return 0;
-out:
+err_out:
+ devl_resources_unregister(devlink);
return err;
}