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| author | Dmytro Linkin <dlinkin@nvidia.com> | 2021-06-23 16:43:15 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-23 15:46:25 -0700 |
| commit | a3e5e5797faad0db319d106afaa31b9020fac44f (patch) | |
| tree | 97d736059ad5dd500ad2c0ab91f99b30c5355243 /net/core | |
| parent | ff99324ded0176d28c3d8de7cac44580cf79d52a (diff) | |
| download | linux-rpi-a3e5e5797faad0db319d106afaa31b9020fac44f.tar.gz linux-rpi-a3e5e5797faad0db319d106afaa31b9020fac44f.tar.bz2 linux-rpi-a3e5e5797faad0db319d106afaa31b9020fac44f.zip | |
devlink: Protect rate list with lock while switching modes
Devlink eswitch set command doesn't hold devlink->lock, which makes
possible race condition between rate list traversing and others devlink
rate KAPI calls, like devlink_rate_nodes_destroy().
Hold devlink lock while traversing the list.
Fixes: a8ecb93ef03d ("devlink: Introduce rate nodes")
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/devlink.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c index 153d432f6daf..8fdd04f00fd7 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -2710,11 +2710,15 @@ static int devlink_rate_nodes_check(struct devlink *devlink, u16 mode, { struct devlink_rate *devlink_rate; + /* Take the lock to sync with devlink_rate_nodes_destroy() */ + mutex_lock(&devlink->lock); list_for_each_entry(devlink_rate, &devlink->rate_list, list) if (devlink_rate_is_node(devlink_rate)) { + mutex_unlock(&devlink->lock); NL_SET_ERR_MSG_MOD(extack, "Rate node(s) exists."); return -EBUSY; } + mutex_unlock(&devlink->lock); return 0; } |