[ BUG: Invalid wait context ]
6.15.0-rc2-syzkaller-00087-gcfb2e2c57aef #0 Not tainted
-----------------------------
syz.0.415/7171 is trying to lock:
ffffc90003dda410 (&gpc->lock){....}-{3:3}, at: kvm_xen_set_evtchn_fast+0x254/0xeb0 arch/x86/kvm/xen.c:1819
other info that might help us debug this:
context-{2:2}
4 locks held by syz.0.415/7171:
#0: ffff888032c26210 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#0: ffff888032c26210 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: simple_recursive_removal+0x2f5/0x8e0 fs/libfs.c:627
#1: ffffffff8e3c15c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#1: ffffffff8e3c15c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#1: ffffffff8e3c15c0 (rcu_read_lock){....}-{1:3}, at: dput.part.0+0x38/0x9b0 fs/dcache.c:895
#2: ffff888027fc6c90 (&lockref->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff888027fc6c90 (&lockref->lock){+.+.}-{3:3}, at: fast_dput fs/dcache.c:818 [inline]
#2: ffff888027fc6c90 (&lockref->lock){+.+.}-{3:3}, at: dput.part.0+0x766/0x9b0 fs/dcache.c:896
#3: ffffc90003dda958 (&kvm->srcu){.?.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#3: ffffc90003dda958 (&kvm->srcu){.?.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#3: ffffc90003dda958 (&kvm->srcu){.?.+}-{0:0}, at: kvm_xen_set_evtchn_fast+0x23a/0xeb0 arch/x86/kvm/xen.c:1817
stack backtrace:
CPU: 1 UID: 0 PID: 7171 Comm: syz.0.415 Not tainted 6.15.0-rc2-syzkaller-00087-gcfb2e2c57aef #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4831 [inline]
check_wait_context kernel/locking/lockdep.c:4903 [inline]
__lock_acquire+0x3ff/0x1ba0 kernel/locking/lockdep.c:5185
lock_acquire kernel/locking/lockdep.c:5866 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
kvm_xen_set_evtchn_fast+0x254/0xeb0 arch/x86/kvm/xen.c:1819
xen_timer_callback+0x1db/0x2a0 arch/x86/kvm/xen.c:140
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x5ea/0xad0 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_trylock include/linux/spinlock_api_smp.h:90 [inline]
RIP: 0010:_raw_spin_trylock+0x43/0x80 kernel/locking/spinlock.c:138
Code: 23 f6 85 c0 75 20 89 c3 bf 01 00 00 00 e8 d5 ce 13 f6 65 8b 05 1e f6 31 08 85 c0 74 37 89 d8 5b 5d c3 cc cc cc cc ff 74 24 10 <48> 8d 7d 18 bb 01 00 00 00 45 31 c9 41 b8 01 00 00 00 31 c9 ba 01
RSP: 0018:ffffc90006acfc18 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff888027fc6bc0 RCX: ffffffff819869d0
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888032de85a8
RBP: ffff888032de8598 R08: 0000000000000001 R09: fffff52000d59f78
R10: 0000000000000003 R11: 0000000000000000 R12: ffff888027fc6c28
R13: ffff888027fc6cb8 R14: ffff888032de8598 R15: ffff888027fc6068
spin_trylock include/linux/spinlock.h:361 [inline]
lock_for_kill+0x99/0x240 fs/dcache.c:705
dput.part.0+0x45b/0x9b0 fs/dcache.c:900
dput+0x1f/0x30 fs/dcache.c:892
find_next_child fs/libfs.c:603 [inline]
simple_recursive_removal+0x131/0x8e0 fs/libfs.c:618
debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:805
kvm_destroy_vm_debugfs+0xc6/0x250 virt/kvm/kvm_main.c:1009
kvm_destroy_vm virt/kvm/kvm_main.c:1273 [inline]
kvm_put_kvm+0xff/0xb40 virt/kvm/kvm_main.c:1346
kvm_vm_release+0x3c/0x50 virt/kvm/kvm_main.c:1369
__fput+0x3ff/0xb70 fs/file_table.c:465
task_work_run+0x14d/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc02cf8e169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffef6648858 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000016bb7 RCX: 00007fc02cf8e169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc02d1b7ba0 R08: 0000000000000001 R09: 00000005f6648b4f
R10: 00007fc02ce00000 R11: 0000000000000246 R12: 00007fc02d1b5fac
R13: 00007fc02d1b5fa0 R14: ffffffffffffffff R15: 00007ffef6648970
----------------
Code disassembly (best guess):
0: 23 f6 and %esi,%esi
2: 85 c0 test %eax,%eax
4: 75 20 jne 0x26
6: 89 c3 mov %eax,%ebx
8: bf 01 00 00 00 mov $0x1,%edi
d: e8 d5 ce 13 f6 call 0xf613cee7
12: 65 8b 05 1e f6 31 08 mov %gs:0x831f61e(%rip),%eax # 0x831f637
19: 85 c0 test %eax,%eax
1b: 74 37 je 0x54
1d: 89 d8 mov %ebx,%eax
1f: 5b pop %rbx
20: 5d pop %rbp
21: c3 ret
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: ff 74 24 10 push 0x10(%rsp)
* 2a: 48 8d 7d 18 lea 0x18(%rbp),%rdi <-- trapping instruction
2e: bb 01 00 00 00 mov $0x1,%ebx
33: 45 31 c9 xor %r9d,%r9d
36: 41 b8 01 00 00 00 mov $0x1,%r8d
3c: 31 c9 xor %ecx,%ecx
3e: ba .byte 0xba
3f: 01 .byte 0x1