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Message-ID: <0f3f5941-0a95-723e-11e1-6fad8e2133b0@linux.dev> Date: Tue, 23 May 2023 10:07:51 +0800 From: Guoqing Jiang <guoqing.jiang@...ux.dev> To: syzbot <syzbot+eba589d8f49c73d356da@...kaller.appspotmail.com>, jgg@...pe.ca, leon@...nel.org, linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com, zyjzyj2000@...il.com Subject: Re: [syzbot] [rdma?] INFO: trying to register non-static key in skb_dequeue (2) On 5/18/23 17:20, syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: ab87603b2511 net: wwan: t7xx: Ensure init is completed bef.. > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=1157266a280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=eb92acf166a5d2cd > dashboard link: https://syzkaller.appspot.com/bug?extid=eba589d8f49c73d356da > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124d5da6280000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/ac3ed2228400/disk-ab87603b.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/c51b74034116/vmlinux-ab87603b.xz > kernel image: https://storage.googleapis.com/syzbot-assets/98ab9d7ee1ee/bzImage-ab87603b.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+eba589d8f49c73d356da@...kaller.appspotmail.com > > infiniband syz2: set active > infiniband syz2: added team0 > INFO: trying to register non-static key. > The code is fine but needs lockdep annotation, or maybe > you didn't initialize this object before use? > turning off the locking correctness validator. > CPU: 0 PID: 5133 Comm: syz-executor.3 Not tainted 6.4.0-rc1-syzkaller-00136-gab87603b2511 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 > assign_lock_key kernel/locking/lockdep.c:982 [inline] > register_lock_class+0xdb6/0x1120 kernel/locking/lockdep.c:1295 > __lock_acquire+0x10a/0x5df0 kernel/locking/lockdep.c:4951 > lock_acquire kernel/locking/lockdep.c:5691 [inline] > lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656 > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 > skb_dequeue+0x20/0x180 net/core/skbuff.c:3639 > drain_resp_pkts drivers/infiniband/sw/rxe/rxe_comp.c:555 [inline] > rxe_completer+0x250d/0x3cc0 drivers/infiniband/sw/rxe/rxe_comp.c:652 > rxe_qp_do_cleanup+0x1be/0x820 drivers/infiniband/sw/rxe/rxe_qp.c:761 > execute_in_process_context+0x3b/0x150 kernel/workqueue.c:3473 > __rxe_cleanup+0x21e/0x370 drivers/infiniband/sw/rxe/rxe_pool.c:233 > rxe_create_qp+0x3f6/0x5f0 drivers/infiniband/sw/rxe/rxe_verbs.c:583 > create_qp+0x5ac/0x970 drivers/infiniband/core/verbs.c:1235 > ib_create_qp_kernel+0xa1/0x310 drivers/infiniband/core/verbs.c:1346 > ib_create_qp include/rdma/ib_verbs.h:3743 [inline] > create_mad_qp+0x177/0x380 drivers/infiniband/core/mad.c:2905 > ib_mad_port_open drivers/infiniband/core/mad.c:2986 [inline] > ib_mad_init_device+0xf40/0x1a90 drivers/infiniband/core/mad.c:3077 > add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:721 > enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1332 > ib_register_device drivers/infiniband/core/device.c:1420 [inline] > ib_register_device+0x8b1/0xbc0 drivers/infiniband/core/device.c:1366 > rxe_register_device+0x302/0x3e0 drivers/infiniband/sw/rxe/rxe_verbs.c:1485 > rxe_net_add+0x90/0xf0 drivers/infiniband/sw/rxe/rxe_net.c:527 > rxe_newlink+0xf0/0x1b0 drivers/infiniband/sw/rxe/rxe.c:197 > nldev_newlink+0x332/0x5e0 drivers/infiniband/core/nldev.c:1731 > rdma_nl_rcv_msg+0x371/0x6a0 drivers/infiniband/core/netlink.c:195 > rdma_nl_rcv_skb.constprop.0.isra.0+0x2fc/0x440 drivers/infiniband/core/netlink.c:239 > netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] > netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 > netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 > sock_sendmsg_nosec net/socket.c:724 [inline] > sock_sendmsg+0xde/0x190 net/socket.c:747 > ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 > ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 > __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > RIP: 0033:0x7f7a1ee8c169 > Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f7a1fc76168 EFLAGS: 00000246 > ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 00007f7a1efabf80 RCX: 00007f7a1ee8c169 > RDX: 0000000000000040 RSI: 0000000020000200 RDI: 0000000000000003 > RBP: 00007f7a1eee7ca1 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007fffc46ccb6f R14: 00007f7a1fc76300 R15: 0000000000022000 > </TASK> > general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN > KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] > CPU: 0 PID: 5133 Comm: syz-executor.3 Not tainted 6.4.0-rc1-syzkaller-00136-gab87603b2511 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 > RIP: 0010:flush_send_queue drivers/infiniband/sw/rxe/rxe_comp.c:597 [inline] > RIP: 0010:rxe_completer+0x255c/0x3cc0 drivers/infiniband/sw/rxe/rxe_comp.c:653 > Code: 80 3c 02 00 0f 85 81 10 00 00 49 8b af 88 03 00 00 48 8d 45 30 48 89 c2 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 83 11 00 00 48 8d 45 2c 44 8b > RSP: 0018:ffffc9000419e938 EFLAGS: 00010206 > RAX: dffffc0000000000 RBX: ffffed100f5fb800 RCX: 0000000000000000 > RDX: 0000000000000006 RSI: ffffffff877f3bea RDI: ffff88807afdc388 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: fffffbfff1cf4e42 R11: 205d313330355420 R12: ffff88807afdc1a0 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807afdc000 > FS: 00007f7a1fc76700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000c001136000 CR3: 00000000206d3000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > rxe_qp_do_cleanup+0x1be/0x820 drivers/infiniband/sw/rxe/rxe_qp.c:761 > execute_in_process_context+0x3b/0x150 kernel/workqueue.c:3473 > __rxe_cleanup+0x21e/0x370 drivers/infiniband/sw/rxe/rxe_pool.c:233 > rxe_create_qp+0x3f6/0x5f0 drivers/infiniband/sw/rxe/rxe_verbs.c:583 > create_qp+0x5ac/0x970 drivers/infiniband/core/verbs.c:1235 > ib_create_qp_kernel+0xa1/0x310 drivers/infiniband/core/verbs.c:1346 > ib_create_qp include/rdma/ib_verbs.h:3743 [inline] > create_mad_qp+0x177/0x380 drivers/infiniband/core/mad.c:2905 > ib_mad_port_open drivers/infiniband/core/mad.c:2986 [inline] > ib_mad_init_device+0xf40/0x1a90 drivers/infiniband/core/mad.c:3077 > add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:721 > enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1332 > ib_register_device drivers/infiniband/core/device.c:1420 [inline] > ib_register_device+0x8b1/0xbc0 drivers/infiniband/core/device.c:1366 > rxe_register_device+0x302/0x3e0 drivers/infiniband/sw/rxe/rxe_verbs.c:1485 > rxe_net_add+0x90/0xf0 drivers/infiniband/sw/rxe/rxe_net.c:527 > rxe_newlink+0xf0/0x1b0 drivers/infiniband/sw/rxe/rxe.c:197 > nldev_newlink+0x332/0x5e0 drivers/infiniband/core/nldev.c:1731 > rdma_nl_rcv_msg+0x371/0x6a0 drivers/infiniband/core/netlink.c:195 > rdma_nl_rcv_skb.constprop.0.isra.0+0x2fc/0x440 drivers/infiniband/core/netlink.c:239 > netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] > netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 > netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 > sock_sendmsg_nosec net/socket.c:724 [inline] > sock_sendmsg+0xde/0x190 net/socket.c:747 > ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 > ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 > __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > RIP: 0033:0x7f7a1ee8c169 > Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f7a1fc76168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 00007f7a1efabf80 RCX: 00007f7a1ee8c169 > RDX: 0000000000000040 RSI: 0000000020000200 RDI: 0000000000000003 > RBP: 00007f7a1eee7ca1 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007fffc46ccb6f R14: 00007f7a1fc76300 R15: 0000000000022000 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:flush_send_queue drivers/infiniband/sw/rxe/rxe_comp.c:597 [inline] > RIP: 0010:rxe_completer+0x255c/0x3cc0 drivers/infiniband/sw/rxe/rxe_comp.c:653 Looks if rxe_qp_from_init returns failure, qp->sq.queue is NULL but rxe still de-reference it during cleanup. And it is the same for sk_buff_head. #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-rc diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c index 61a2eb77d999..17ed41309756 100644 --- a/drivers/infiniband/sw/rxe/rxe_qp.c +++ b/drivers/infiniband/sw/rxe/rxe_qp.c @@ -758,19 +758,21 @@ static void rxe_qp_do_cleanup(struct work_struct *work) del_timer_sync(&qp->rnr_nak_timer); } - if (qp->resp.task.func) + /* flush out any receive wr's or pending requests */ + if (qp->resp.task.func) { rxe_cleanup_task(&qp->resp.task); + rxe_responder(qp); + } - if (qp->req.task.func) + if (qp->req.task.func) { rxe_cleanup_task(&qp->req.task); + rxe_requester(qp); + } - if (qp->comp.task.func) + if (qp->comp.task.func) { rxe_cleanup_task(&qp->comp.task); - - /* flush out any receive wr's or pending requests */ - rxe_requester(qp); - rxe_completer(qp); - rxe_responder(qp); + rxe_completer(qp); + } if (qp->sq.queue) rxe_queue_cleanup(qp->sq.queue);
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