Re: [PATCH net] net: sched: don't use GFP_KERNEL under spin lock
From: Jiri Pirko <jiri@resnulli.us>
Date: 2017-09-05 12:52:25
Tue, Sep 05, 2017 at 12:59:48PM CEST, kubakici@wp.pl wrote:
Jiri, FWIW I also just noticed these, but they seem related to the earlier TC chain work?
What do you do to trigger this?
unreferenced object 0xffff8807466f70c8 (size 64): comm "tc", pid 1812, jiffies 4294932641 (age 1537.192s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 a0 83 e1 31 07 88 ff ff ...........1.... d8 70 6f 46 07 88 ff ff d8 70 6f 46 07 88 ff ff .poF.....poF.... backtrace: [<ffffffffaa6b0118>] kmemleak_alloc+0x28/0x50 [<ffffffffa89a89b6>] kmem_cache_alloc_trace+0x1e6/0x550 [<ffffffffaa102827>] tcf_chain_create+0x97/0x460 [<ffffffffaa102f67>] tcf_block_get+0x127/0x230 [<ffffffffc03e8546>] ingress_init+0x76/0x110 [sch_ingress] [<ffffffffaa0fbb1c>] qdisc_create+0x2ec/0x1100 [<ffffffffaa0fce1a>] tc_modify_qdisc+0x4ea/0x1ae0 [<ffffffffaa0355dc>] rtnetlink_rcv_msg+0xa3c/0x1400 [<ffffffffaa12e3cb>] netlink_rcv_skb+0x22b/0x4e0 [<ffffffffaa024b55>] rtnetlink_rcv+0x15/0x20 [<ffffffffaa12bddd>] netlink_unicast+0x47d/0x710 [<ffffffffaa12caef>] netlink_sendmsg+0xa7f/0x1140 [<ffffffffa9f15c52>] sock_sendmsg+0xe2/0x170 [<ffffffffa9f188bd>] ___sys_sendmsg+0x72d/0xcc0 [<ffffffffa9f1bfa2>] __sys_sendmsg+0xe2/0x260 [<ffffffffa9f1c132>] SyS_sendmsg+0x12/0x20 unreferenced object 0xffff88074db6c008 (size 64): comm "tc", pid 2097, jiffies 4294953636 (age 1453.212s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 60 a6 d1 31 07 88 ff ff ........`..1.... 18 c0 b6 4d 07 88 ff ff 18 c0 b6 4d 07 88 ff ff ...M.......M.... backtrace: [<ffffffffaa6b0118>] kmemleak_alloc+0x28/0x50 [<ffffffffa89a89b6>] kmem_cache_alloc_trace+0x1e6/0x550 [<ffffffffaa102827>] tcf_chain_create+0x97/0x460 [<ffffffffaa102f67>] tcf_block_get+0x127/0x230 [<ffffffffc03e8546>] ingress_init+0x76/0x110 [sch_ingress] [<ffffffffaa0fbb1c>] qdisc_create+0x2ec/0x1100 [<ffffffffaa0fce1a>] tc_modify_qdisc+0x4ea/0x1ae0 [<ffffffffaa0355dc>] rtnetlink_rcv_msg+0xa3c/0x1400 [<ffffffffaa12e3cb>] netlink_rcv_skb+0x22b/0x4e0 [<ffffffffaa024b55>] rtnetlink_rcv+0x15/0x20 [<ffffffffaa12bddd>] netlink_unicast+0x47d/0x710 [<ffffffffaa12caef>] netlink_sendmsg+0xa7f/0x1140 [<ffffffffa9f15c52>] sock_sendmsg+0xe2/0x170 [<ffffffffa9f188bd>] ___sys_sendmsg+0x72d/0xcc0 [<ffffffffa9f1bfa2>] __sys_sendmsg+0xe2/0x260 [<ffffffffa9f1c132>] SyS_sendmsg+0x12/0x20 unreferenced object 0xffff880749f82a48 (size 64): comm "tc", pid 2381, jiffies 4294972986 (age 1375.812s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 c0 b7 31 31 07 88 ff ff ..........11.... 58 2a f8 49 07 88 ff ff 58 2a f8 49 07 88 ff ff X*.I....X*.I.... backtrace: [<ffffffffaa6b0118>] kmemleak_alloc+0x28/0x50 [<ffffffffa89a89b6>] kmem_cache_alloc_trace+0x1e6/0x550 [<ffffffffaa102827>] tcf_chain_create+0x97/0x460 [<ffffffffaa102f67>] tcf_block_get+0x127/0x230 [<ffffffffc03e8546>] ingress_init+0x76/0x110 [sch_ingress] [<ffffffffaa0fbb1c>] qdisc_create+0x2ec/0x1100 [<ffffffffaa0fce1a>] tc_modify_qdisc+0x4ea/0x1ae0 [<ffffffffaa0355dc>] rtnetlink_rcv_msg+0xa3c/0x1400 [<ffffffffaa12e3cb>] netlink_rcv_skb+0x22b/0x4e0 [<ffffffffaa024b55>] rtnetlink_rcv+0x15/0x20 [<ffffffffaa12bddd>] netlink_unicast+0x47d/0x710 [<ffffffffaa12caef>] netlink_sendmsg+0xa7f/0x1140 [<ffffffffa9f15c52>] sock_sendmsg+0xe2/0x170 [<ffffffffa9f188bd>] ___sys_sendmsg+0x72d/0xcc0 [<ffffffffa9f1bfa2>] __sys_sendmsg+0xe2/0x260 [<ffffffffa9f1c132>] SyS_sendmsg+0x12/0x20 unreferenced object 0xffff8803fd855a08 (size 64): comm "tc", pid 2663, jiffies 4294992152 (age 1299.328s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 20 49 80 31 07 88 ff ff ........ I.1.... 18 5a 85 fd 03 88 ff ff 18 5a 85 fd 03 88 ff ff .Z.......Z...... backtrace: [<ffffffffaa6b0118>] kmemleak_alloc+0x28/0x50 [<ffffffffa89a89b6>] kmem_cache_alloc_trace+0x1e6/0x550 [<ffffffffaa102827>] tcf_chain_create+0x97/0x460 [<ffffffffaa102f67>] tcf_block_get+0x127/0x230 [<ffffffffc03e8546>] ingress_init+0x76/0x110 [sch_ingress] [<ffffffffaa0fbb1c>] qdisc_create+0x2ec/0x1100 [<ffffffffaa0fce1a>] tc_modify_qdisc+0x4ea/0x1ae0 [<ffffffffaa0355dc>] rtnetlink_rcv_msg+0xa3c/0x1400 [<ffffffffaa12e3cb>] netlink_rcv_skb+0x22b/0x4e0 [<ffffffffaa024b55>] rtnetlink_rcv+0x15/0x20 [<ffffffffaa12bddd>] netlink_unicast+0x47d/0x710 [<ffffffffaa12caef>] netlink_sendmsg+0xa7f/0x1140 [<ffffffffa9f15c52>] sock_sendmsg+0xe2/0x170 [<ffffffffa9f188bd>] ___sys_sendmsg+0x72d/0xcc0 [<ffffffffa9f1bfa2>] __sys_sendmsg+0xe2/0x260 [<ffffffffa9f1c132>] SyS_sendmsg+0x12/0x20 unreferenced object 0xffff88071b096f28 (size 64): comm "tc", pid 2943, jiffies 4295013397 (age 1214.352s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 c0 37 e7 30 07 88 ff ff .........7.0.... 38 6f 09 1b 07 88 ff ff 38 6f 09 1b 07 88 ff ff 8o......8o...... backtrace: [<ffffffffaa6b0118>] kmemleak_alloc+0x28/0x50 [<ffffffffa89a89b6>] kmem_cache_alloc_trace+0x1e6/0x550 [<ffffffffaa102827>] tcf_chain_create+0x97/0x460 [<ffffffffaa102f67>] tcf_block_get+0x127/0x230 [<ffffffffc03e8546>] ingress_init+0x76/0x110 [sch_ingress] [<ffffffffaa0fbb1c>] qdisc_create+0x2ec/0x1100 [<ffffffffaa0fce1a>] tc_modify_qdisc+0x4ea/0x1ae0 [<ffffffffaa0355dc>] rtnetlink_rcv_msg+0xa3c/0x1400 [<ffffffffaa12e3cb>] netlink_rcv_skb+0x22b/0x4e0 [<ffffffffaa024b55>] rtnetlink_rcv+0x15/0x20 [<ffffffffaa12bddd>] netlink_unicast+0x47d/0x710 [<ffffffffaa12caef>] netlink_sendmsg+0xa7f/0x1140 [<ffffffffa9f15c52>] sock_sendmsg+0xe2/0x170 [<ffffffffa9f188bd>] ___sys_sendmsg+0x72d/0xcc0 [<ffffffffa9f1bfa2>] __sys_sendmsg+0xe2/0x260 [<ffffffffa9f1c132>] SyS_sendmsg+0x12/0x20 unreferenced object 0xffff880731f66568 (size 64): comm "tc", pid 3263, jiffies 4295033366 (age 1134.480s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 95 64 65 07 88 ff ff ..........de.... 78 65 f6 31 07 88 ff ff 78 65 f6 31 07 88 ff ff xe.1....xe.1.... backtrace: [<ffffffffaa6b0118>] kmemleak_alloc+0x28/0x50 [<ffffffffa89a89b6>] kmem_cache_alloc_trace+0x1e6/0x550 [<ffffffffaa102827>] tcf_chain_create+0x97/0x460 [<ffffffffaa102f67>] tcf_block_get+0x127/0x230 [<ffffffffc03e8546>] ingress_init+0x76/0x110 [sch_ingress] [<ffffffffaa0fbb1c>] qdisc_create+0x2ec/0x1100 [<ffffffffaa0fce1a>] tc_modify_qdisc+0x4ea/0x1ae0 [<ffffffffaa0355dc>] rtnetlink_rcv_msg+0xa3c/0x1400 [<ffffffffaa12e3cb>] netlink_rcv_skb+0x22b/0x4e0 [<ffffffffaa024b55>] rtnetlink_rcv+0x15/0x20 [<ffffffffaa12bddd>] netlink_unicast+0x47d/0x710 [<ffffffffaa12caef>] netlink_sendmsg+0xa7f/0x1140 [<ffffffffa9f15c52>] sock_sendmsg+0xe2/0x170 [<ffffffffa9f188bd>] ___sys_sendmsg+0x72d/0xcc0 [<ffffffffa9f1bfa2>] __sys_sendmsg+0xe2/0x260 [<ffffffffa9f1c132>] SyS_sendmsg+0x12/0x20