Cong Wang <xiyou.wangcong@xxxxxxxxx> wrote: > While testing my TC filter patches (so not related to conntrack), the > following memory leaks are shown up: > > unreferenced object 0xffff9b19ba551228 (size 128): > comm "chronyd", pid 338, jiffies 4294910829 (age 53.188s) > hex dump (first 32 bytes): > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 00 00 00 00 18 00 00 30 00 00 00 00 00 00 00 00 .......0........ > backtrace: > [<ffffffff9f1e1175>] create_object+0x169/0x2aa > [<ffffffff9fb77fb2>] kmemleak_alloc+0x25/0x41 > [<ffffffff9f1c47ed>] slab_post_alloc_hook+0x44/0x65 > [<ffffffff9f1ca2db>] __kmalloc_track_caller+0x113/0x146 > [<ffffffff9f193c3b>] __krealloc+0x4a/0x69 > [<ffffffff9f948dbd>] nf_ct_ext_add+0xe1/0x145 > [<ffffffff9f942395>] init_conntrack+0x1f7/0x36e > [<ffffffff9f942762>] nf_conntrack_in+0x1d3/0x326 > [<ffffffff9fa1ea69>] ipv4_conntrack_local+0x4d/0x50 > [<ffffffff9f93ad70>] nf_hook_slow+0x3c/0x9b > [<ffffffff9f9c7999>] nf_hook.constprop.40+0xbe/0xd8 > [<ffffffff9f9c7ba2>] __ip_local_out+0xb3/0xbf > [<ffffffff9f9c7bca>] ip_local_out+0x1c/0x36 > [<ffffffff9f9c9216>] ip_send_skb+0x19/0x3d > [<ffffffff9f9ee3de>] udp_send_skb+0x17e/0x1df > [<ffffffff9f9eea37>] udp_sendmsg+0x5a2/0x77c > unreferenced object 0xffff9b19a69b3340 (size 336): > comm "chronyd", pid 338, jiffies 4294910868 (age 53.032s) > hex dump (first 32 bytes): > 01 00 00 00 5a 5a 5a 5a 00 00 00 00 ad 4e ad de ....ZZZZ.....N.. > ff ff ff ff 5a 5a 5a 5a ff ff ff ff ff ff ff ff ....ZZZZ........ > backtrace: > [<ffffffff9f1e1175>] create_object+0x169/0x2aa > [<ffffffff9fb77fb2>] kmemleak_alloc+0x25/0x41 > [<ffffffff9f1c47ed>] slab_post_alloc_hook+0x44/0x65 > [<ffffffff9f1c7a7d>] kmem_cache_alloc+0xd7/0x1f1 > [<ffffffff9f941b78>] __nf_conntrack_alloc+0xa2/0x146 > [<ffffffff9f942250>] init_conntrack+0xb2/0x36e > [<ffffffff9f942762>] nf_conntrack_in+0x1d3/0x326 > [<ffffffff9fa1ea69>] ipv4_conntrack_local+0x4d/0x50 > [<ffffffff9f93ad70>] nf_hook_slow+0x3c/0x9b > [<ffffffff9f9c7999>] nf_hook.constprop.40+0xbe/0xd8 > [<ffffffff9f9c7ba2>] __ip_local_out+0xb3/0xbf > [<ffffffff9f9c7bca>] ip_local_out+0x1c/0x36 > [<ffffffff9f9c9216>] ip_send_skb+0x19/0x3d > [<ffffffff9f9ee3de>] udp_send_skb+0x17e/0x1df > [<ffffffff9f9eea37>] udp_sendmsg+0x5a2/0x77c > [<ffffffff9f9f8cb8>] inet_sendmsg+0x37/0x5e > > I don't touch chronyd in my VM, so I have no idea why it sends out UDP > packets, my guess is it is some periodical packet. > > I don't think I use conntrack either, since /proc/net/ip_conntrack > does not exist. You probably do, can you try "cat /proc/net/nf_conntrack" instead? (otherwise there should be no ipv4_conntrack_local() invocation since we would not register this hook at all). I tried to reproduce this but so far I had no success. If you can identify something that could give a hint when this is happening (only once after boot, periodically, only with udp, etc) please let us know. (A reproducer would be even better of course ;-) ) Is this with current net tree? Thanks! -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
