=============================
[ BUG: Invalid wait context ]
syzkaller #0 Not tainted
-----------------------------
syz.0.0/5320 is trying to lock:
ffff88804ffbdbb0 (&gpc->lock){....}-{3:3}, at: kvm_xen_set_evtchn_fast+0x1f4/0x9a0 arch/x86/kvm/xen.c:1822
other info that might help us debug this:
context-{2:2}
4 locks held by syz.0.0/5320:
#0: ffff88803359c3a0 (sk_lock-AF_TIPC){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#0: ffff88803359c3a0 (sk_lock-AF_TIPC){+.+.}-{0:0}, at: tipc_wait_for_rcvmsg+0x342/0x640 net/tipc/socket.c:1853
#1: ffff88803359bbe8 (slock-AF_TIPC){+...}-{3:3}, at: spin_trylock_bh include/linux/spinlock.h:414 [inline]
#1: ffff88803359bbe8 (slock-AF_TIPC){+...}-{3:3}, at: tipc_sk_rcv+0x420/0x2b50 net/tipc/socket.c:2501
#2: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#2: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#2: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: tipc_write_space+0x20/0x260 net/tipc/socket.c:2118
#3: ffff88804ffbe110 (&kvm->srcu){.?.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:187 [inline]
#3: ffff88804ffbe110 (&kvm->srcu){.?.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:294 [inline]
#3: ffff88804ffbe110 (&kvm->srcu){.?.+}-{0:0}, at: kvm_xen_set_evtchn_fast+0x1bc/0x9a0 arch/x86/kvm/xen.c:1820
stack backtrace:
CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4830 [inline]
check_wait_context kernel/locking/lockdep.c:4902 [inline]
__lock_acquire+0xe39/0x2cf0 kernel/locking/lockdep.c:5187
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
_raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
kvm_xen_set_evtchn_fast+0x1f4/0x9a0 arch/x86/kvm/xen.c:1822
xen_timer_callback+0x109/0x220 arch/x86/kvm/xen.c:140
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x371/0xa10 kernel/time/hrtimer.c:2096
hrtimer_interrupt+0x448/0x910 kernel/time/hrtimer.c:2215
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 2d dd cd f5 f7 c3 00 02 00 00 74 05 e8 20 cd f9 f5 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c4 f0 be f5 65 8b 05 bd f0 97 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc900014e6db8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000282 RCX: 0000000080000202
RDX: 0000000000000002 RSI: ffffffff8e22b7e8 RDI: 0000000000000001
RBP: ffff88800bdb4680 R08: ffffffff90576c37 R09: 1ffffffff20aed86
R10: dffffc0000000000 R11: fffffbfff20aed87 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88800bdb4640 R15: ffff88800bdb4680
spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
__wake_up_common_lock+0x195/0x1f0 kernel/sched/wait.c:127
tipc_write_space+0x15c/0x260 net/tipc/socket.c:2121
tipc_sk_conn_proto_rcv net/tipc/socket.c:1376 [inline]
tipc_sk_proto_rcv+0xc51/0x1810 net/tipc/socket.c:2161
tipc_sk_filter_rcv+0x2fd7/0x3210 net/tipc/socket.c:2357
tipc_sk_enqueue net/tipc/socket.c:2450 [inline]
tipc_sk_rcv+0x877/0x2b50 net/tipc/socket.c:2502
tipc_node_xmit+0x205/0xf10 net/tipc/node.c:1701
tipc_node_xmit_skb+0x11e/0x190 net/tipc/node.c:1766
tipc_recvstream+0x835/0xe90 net/tipc/socket.c:2098
sock_recvmsg_nosec net/socket.c:1126 [inline]
sock_recvmsg+0x196/0x1e0 net/socket.c:1148
____sys_recvmsg+0x1e6/0x4a0 net/socket.c:2904
___sys_recvmsg+0x213/0x5a0 net/socket.c:2946
__sys_recvmsg net/socket.c:2979 [inline]
__do_sys_recvmsg net/socket.c:2985 [inline]
__se_sys_recvmsg net/socket.c:2982 [inline]
__x64_sys_recvmsg+0x1ae/0x290 net/socket.c:2982
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe65339e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe654239fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fe653625fa0 RCX: 00007fe65339e0d9
RDX: 0000000000001f00 RSI: 0000200000000500 RDI: 000000000000000b
RBP: 00007fe653435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe653626038 R14: 00007fe653625fa0 R15: 00007ffe8e340b48
----------------
Code disassembly (best guess):
0: f7 e8 imul %eax
2: 2d dd cd f5 f7 sub $0xf7f5cddd,%eax
7: c3 ret
8: 00 02 add %al,(%rdx)
a: 00 00 add %al,(%rax)
c: 74 05 je 0x13
e: e8 20 cd f9 f5 call 0xf5f9cd33
13: 9c pushf
14: 58 pop %rax
15: a9 00 02 00 00 test $0x200,%eax
1a: 75 27 jne 0x43
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 c4 f0 be f5 call 0xf5bef0f3 <-- trapping instruction
2f: 65 8b 05 bd f0 97 07 mov %gs:0x797f0bd(%rip),%eax # 0x797f0f3
36: 85 c0 test %eax,%eax
38: 74 18 je 0x52
3a: 5b pop %rbx
3b: 41 5e pop %r14
3d: c3 ret
3e: cc int3
3f: cc int3