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| author | Eric Dumazet <edumazet@google.com> | 2021-12-09 23:44:21 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-10 06:38:26 -0800 |
| commit | 9ba74e6c9e9d0c5c1e5792a7111fc7d1a0589cb8 (patch) | |
| tree | 0984bfcc460de30d23f22d4230992964496199da /include/linux/netdevice.h | |
| parent | e5d75fc20b9278d07731f69e327adf16227813a6 (diff) | |
| download | linux-9ba74e6c9e9d0c5c1e5792a7111fc7d1a0589cb8.tar.gz | |
net: add networking namespace refcount tracker
We have 100+ syzbot reports about netns being dismantled too soon,
still unresolved as of today.
We think a missing get_net() or an extra put_net() is the root cause.
In order to find the bug(s), and be able to spot future ones,
this patch adds CONFIG_NET_NS_REFCNT_TRACKER and new helpers
to precisely pair all put_net() with corresponding get_net().
To use these helpers, each data structure owning a refcount
should also use a "netns_tracker" to pair the get and put.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 1a748ee9a421a7..235d5d082f1a44 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -48,7 +48,7 @@ #include <uapi/linux/pkt_cls.h> #include <linux/hashtable.h> #include <linux/rbtree.h> -#include <linux/ref_tracker.h> +#include <net/net_trackers.h> struct netpoll_info; struct device; @@ -300,13 +300,6 @@ enum netdev_state_t { __LINK_STATE_TESTING, }; - -#ifdef CONFIG_NET_DEV_REFCNT_TRACKER -typedef struct ref_tracker *netdevice_tracker; -#else -typedef struct {} netdevice_tracker; -#endif - struct gro_list { struct list_head list; int count; |