WARNING: suspicious RCU usage in ovs_flow_tbl_masks_cache

Title	Replies (including bot)	Last reply
[PATCH 5.9 000/133] 5.9.7-rc1 review	139 (139)	2020/11/10 03:55
[PATCH net v2] net: openvswitch: silence suspicious RCU usage warning	2 (2)	2020/11/04 01:00
[PATCH net] net: openvswitch: silence suspicious RCU usage warning	5 (5)	2020/11/03 08:26
WARNING: suspicious RCU usage in ovs_flow_tbl_masks_cache_resize	1 (2)	2020/10/29 13:49

Title

Replies (including bot)

Last reply

[PATCH 5.9 000/133] 5.9.7-rc1 review

139 (139)

2020/11/10 03:55

[PATCH net v2] net: openvswitch: silence suspicious RCU usage warning

2 (2)

2020/11/04 01:00

[PATCH net] net: openvswitch: silence suspicious RCU usage warning

5 (5)

2020/11/03 08:26

WARNING: suspicious RCU usage in ovs_flow_tbl_masks_cache_resize

1 (2)

2020/10/29 13:49


Created	Duration	User	Patch	Repo	Result
2020/10/29 13:43	17m	echaudro@redhat.com		https://github.com/chaudron/kernel_net.git ovs_syzbot	OK
2020/10/29 12:06	17m	echaudro@redhat.com		https://github.com/chaudron/kernel_net.git ovs_syzbot	OK

netlink: 44 bytes leftover after parsing attributes in process `syz-executor522'. ============================= WARNING: suspicious RCU usage 5.9.0-syzkaller #0 Not tainted ----------------------------- net/openvswitch/flow_table.c:393 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor522/8493: #0: ffffffff8c9af210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810 stack backtrace: CPU: 1 PID: 8493 Comm: syz-executor522 Not tainted 5.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 ovs_flow_tbl_masks_cache_resize+0x1bf/0x200 net/openvswitch/flow_table.c:393 ovs_dp_change+0x231/0x2b0 net/openvswitch/datapath.c:1616 ovs_dp_cmd_new+0x4c1/0xec0 net/openvswitch/datapath.c:1706 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x440ad9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffff6e416d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440ad9 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000003 RBP: 00000000006cb018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004022e0