On Fri, Aug 26, 2022 at 10:50 AM Jiri Olsa <olsajiri@xxxxxxxxx> wrote: > > hi, > I'm getting memory leaks report after running test_progs, > on latest bpf-next/master, looks networking related > > jirka > > > --- > unreferenced object 0xffff888102b816c0 (size 232): > comm "(ostnamed)", pid 534, jiffies 4294672162 (age 704.879s) > hex dump (first 32 bytes): > 18 17 3c 19 81 88 ff ff c0 0a b8 02 81 88 ff ff ..<............. > 00 c0 a6 1c 81 88 ff ff 00 00 00 00 00 00 00 00 ................ > backtrace: > [<ffffffff81c2c45e>] napi_skb_cache_get+0x4e/0x60 > [<ffffffff81c2c532>] __alloc_skb+0x52/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 This is a bit strange, because napi_get_frags_check() seems very self-contained with no obvious leak... > [<ffffffff81c4e3e5>] netif_napi_add_weight+0x135/0x280 > [<ffffffff81cbc22a>] gro_cells_init+0x8a/0xe0 > [<ffffffff81ed8960>] ip6_tnl_dev_init+0xe0/0x1b0 > [<ffffffff81c567ea>] register_netdevice+0x19a/0x6b0 > [<ffffffff81c56d1a>] register_netdev+0x1a/0x30 > [<ffffffff81eda4b2>] ip6_tnl_init_net+0x1c2/0x440 > [<ffffffff81c3b678>] ops_init+0x38/0x160 > [<ffffffff81c3c1cf>] setup_net+0x17f/0x340 > [<ffffffff81c3dd7c>] copy_net_ns+0x10c/0x270 > [<ffffffff81181a67>] create_new_namespaces+0x117/0x300 > [<ffffffff811820a5>] unshare_nsproxy_namespaces+0x55/0xb0 > [<ffffffff8114e1bc>] ksys_unshare+0x19c/0x3b0 > unreferenced object 0xffff888102b80ac0 (size 232): > comm "(ostnamed)", pid 534, jiffies 4294672162 (age 704.879s) > hex dump (first 32 bytes): > c0 16 b8 02 81 88 ff ff 40 00 b8 02 81 88 ff ff ........@....... > 00 c0 a6 1c 81 88 ff ff 00 00 00 00 00 00 00 00 ................ > backtrace: > [<ffffffff81c2c45e>] napi_skb_cache_get+0x4e/0x60 > [<ffffffff81c2c532>] __alloc_skb+0x52/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81c4e3e5>] netif_napi_add_weight+0x135/0x280 > [<ffffffff81cbc22a>] gro_cells_init+0x8a/0xe0 > [<ffffffff81ed8960>] ip6_tnl_dev_init+0xe0/0x1b0 > [<ffffffff81c567ea>] register_netdevice+0x19a/0x6b0 > [<ffffffff81c56d1a>] register_netdev+0x1a/0x30 > [<ffffffff81eda4b2>] ip6_tnl_init_net+0x1c2/0x440 > [<ffffffff81c3b678>] ops_init+0x38/0x160 > [<ffffffff81c3c1cf>] setup_net+0x17f/0x340 > [<ffffffff81c3dd7c>] copy_net_ns+0x10c/0x270 > [<ffffffff81181a67>] create_new_namespaces+0x117/0x300 > [<ffffffff811820a5>] unshare_nsproxy_namespaces+0x55/0xb0 > [<ffffffff8114e1bc>] ksys_unshare+0x19c/0x3b0 > unreferenced object 0xffff888102b80040 (size 232): > comm "(ostnamed)", pid 534, jiffies 4294672162 (age 704.879s) > hex dump (first 32 bytes): > c0 0a b8 02 81 88 ff ff c0 0d b8 02 81 88 ff ff ................ > 00 c0 a6 1c 81 88 ff ff 00 00 00 00 00 00 00 00 ................ > backtrace: > [<ffffffff81c2c45e>] napi_skb_cache_get+0x4e/0x60 > [<ffffffff81c2c532>] __alloc_skb+0x52/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81c4e3e5>] netif_napi_add_weight+0x135/0x280 > [<ffffffff81cbc22a>] gro_cells_init+0x8a/0xe0 > [<ffffffff81ed8960>] ip6_tnl_dev_init+0xe0/0x1b0 > [<ffffffff81c567ea>] register_netdevice+0x19a/0x6b0 > [<ffffffff81c56d1a>] register_netdev+0x1a/0x30 > [<ffffffff81eda4b2>] ip6_tnl_init_net+0x1c2/0x440 > [<ffffffff81c3b678>] ops_init+0x38/0x160 > [<ffffffff81c3c1cf>] setup_net+0x17f/0x340 > [<ffffffff81c3dd7c>] copy_net_ns+0x10c/0x270 > [<ffffffff81181a67>] create_new_namespaces+0x117/0x300 > [<ffffffff811820a5>] unshare_nsproxy_namespaces+0x55/0xb0 > [<ffffffff8114e1bc>] ksys_unshare+0x19c/0x3b0 > unreferenced object 0xffff888102b80dc0 (size 232): > comm "(ostnamed)", pid 534, jiffies 4294672162 (age 704.893s) > hex dump (first 32 bytes): > 40 00 b8 02 81 88 ff ff 18 17 3c 19 81 88 ff ff @.........<..... > 00 c0 a6 1c 81 88 ff ff 00 00 00 00 00 00 00 00 ................ > backtrace: > [<ffffffff81c2c45e>] napi_skb_cache_get+0x4e/0x60 > [<ffffffff81c2c532>] __alloc_skb+0x52/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81c4e3e5>] netif_napi_add_weight+0x135/0x280 > [<ffffffff81cbc22a>] gro_cells_init+0x8a/0xe0 > [<ffffffff81ed8960>] ip6_tnl_dev_init+0xe0/0x1b0 > [<ffffffff81c567ea>] register_netdevice+0x19a/0x6b0 > [<ffffffff81c56d1a>] register_netdev+0x1a/0x30 > [<ffffffff81eda4b2>] ip6_tnl_init_net+0x1c2/0x440 > [<ffffffff81c3b678>] ops_init+0x38/0x160 > [<ffffffff81c3c1cf>] setup_net+0x17f/0x340 > [<ffffffff81c3dd7c>] copy_net_ns+0x10c/0x270 > [<ffffffff81181a67>] create_new_namespaces+0x117/0x300 > [<ffffffff811820a5>] unshare_nsproxy_namespaces+0x55/0xb0 > [<ffffffff8114e1bc>] ksys_unshare+0x19c/0x3b0 > unreferenced object 0xffff88812c3a3400 (size 1024): > comm "test_progs", pid 686, jiffies 4294713342 (age 663.722s) > hex dump (first 32 bytes): > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > backtrace: > [<ffffffff81c2c566>] __alloc_skb+0x86/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81a0a952>] tun_get_user+0x242/0x1250 > [<ffffffff81a0c2c0>] tun_chr_write_iter+0x50/0x90 > [<ffffffff81436faf>] do_iter_readv_writev+0xdf/0x140 > [<ffffffff81438fc4>] do_iter_write+0x84/0x1d0 > [<ffffffff81439205>] vfs_writev+0xc5/0x290 > [<ffffffff8143944f>] do_writev+0x7f/0x160 > [<ffffffff81fbd157>] do_syscall_64+0x37/0x90 > [<ffffffff8200009b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd > unreferenced object 0xffff88812c3a4000 (size 1024): > comm "test_progs", pid 686, jiffies 4294713342 (age 663.722s) > hex dump (first 32 bytes): > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > backtrace: > [<ffffffff81c2c566>] __alloc_skb+0x86/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81a0a952>] tun_get_user+0x242/0x1250 > [<ffffffff81a0c2c0>] tun_chr_write_iter+0x50/0x90 > [<ffffffff81436faf>] do_iter_readv_writev+0xdf/0x140 > [<ffffffff81438fc4>] do_iter_write+0x84/0x1d0 > [<ffffffff81439205>] vfs_writev+0xc5/0x290 > [<ffffffff8143944f>] do_writev+0x7f/0x160 > [<ffffffff81fbd157>] do_syscall_64+0x37/0x90 > [<ffffffff8200009b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd > unreferenced object 0xffff88812c3a1000 (size 1024): > comm "test_progs", pid 686, jiffies 4294713342 (age 663.722s) > hex dump (first 32 bytes): > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > backtrace: > [<ffffffff81c2c566>] __alloc_skb+0x86/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81a0a952>] tun_get_user+0x242/0x1250 > [<ffffffff81a0c2c0>] tun_chr_write_iter+0x50/0x90 > [<ffffffff81436faf>] do_iter_readv_writev+0xdf/0x140 > [<ffffffff81438fc4>] do_iter_write+0x84/0x1d0 > [<ffffffff81439205>] vfs_writev+0xc5/0x290 > [<ffffffff8143944f>] do_writev+0x7f/0x160 > [<ffffffff81fbd157>] do_syscall_64+0x37/0x90 > [<ffffffff8200009b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd > unreferenced object 0xffff88812c3a1c00 (size 1024): > comm "test_progs", pid 686, jiffies 4294713342 (age 663.741s) > hex dump (first 32 bytes): > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > backtrace: > [<ffffffff81c2c566>] __alloc_skb+0x86/0x1c0 > [<ffffffff81c2c6db>] __napi_alloc_skb+0x3b/0xe0 > [<ffffffff81c8af09>] napi_get_frags+0x29/0x50 > [<ffffffff81a0a952>] tun_get_user+0x242/0x1250 > [<ffffffff81a0c2c0>] tun_chr_write_iter+0x50/0x90 > [<ffffffff81436faf>] do_iter_readv_writev+0xdf/0x140 > [<ffffffff81438fc4>] do_iter_write+0x84/0x1d0 > [<ffffffff81439205>] vfs_writev+0xc5/0x290 > [<ffffffff8143944f>] do_writev+0x7f/0x160 > [<ffffffff81fbd157>] do_syscall_64+0x37/0x90 > [<ffffffff8200009b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
