=============================
[ BUG: Invalid wait context ]
6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 Not tainted
-----------------------------
klogd/4724 is trying to lock:
ffffc900019b7410 (&gpc->lock){....}-{3:3}, at: kvm_xen_set_evtchn_fast+0x1fb/0x9b0 arch/x86/kvm/xen.c:1820
other info that might help us debug this:
context-{2:2}
2 locks held by klogd/4724:
#0: ffffffff8e133208 (syslog_lock){+.+.}-{4:4}, at: syslog_print+0x442/0x590 kernel/printk/printk.c:1685
#1: ffffc900019b7960 (&kvm->srcu){.?.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#1: ffffc900019b7960 (&kvm->srcu){.?.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#1: ffffc900019b7960 (&kvm->srcu){.?.+}-{0:0}, at: kvm_xen_set_evtchn_fast+0x1c3/0x9b0 arch/x86/kvm/xen.c:1818
stack backtrace:
CPU: 0 UID: 0 PID: 4724 Comm: klogd Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #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_lvl+0x189/0x250 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4833 [inline]
check_wait_context kernel/locking/lockdep.c:4905 [inline]
__lock_acquire+0xbcb/0xd20 kernel/locking/lockdep.c:5190
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0xaf/0x100 kernel/locking/spinlock.c:236
kvm_xen_set_evtchn_fast+0x1fb/0x9b0 arch/x86/kvm/xen.c:1820
xen_timer_callback+0x109/0x220 arch/x86/kvm/xen.c:140
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217
Code: 24 65 48 8b 0c 25 08 50 a0 92 65 8b 15 a8 1c e0 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48
RSP: 0018:ffffc9000224f788 EFLAGS: 00000246
RAX: ffffffff8b6b7bd3 RBX: 0000000000000001 RCX: ffff88801f6ba440
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000000
RBP: ffffffff8b8b8943 R08: ffff88801f6ba440 R09: 0000000000000002
R10: 0000000000000025 R11: 0000000000000000 R12: ffffffff8b8b8944
R13: ffffffff8cb9de94 R14: 0000000000000000 R15: 000000000000000a
format_decode+0x5a3/0xe30 lib/vsprintf.c:2717
vsnprintf+0x102/0xf00 lib/vsprintf.c:2817
sprintf+0xd9/0x120 lib/vsprintf.c:3037
print_time kernel/printk/printk.c:1381 [inline]
info_print_prefix+0x155/0x310 kernel/printk/printk.c:1407
record_print_text+0x154/0x430 kernel/printk/printk.c:1456
syslog_print+0x34f/0x590 kernel/printk/printk.c:1667
do_syslog+0x544/0x760 kernel/printk/printk.c:1785
__do_sys_syslog kernel/printk/printk.c:1877 [inline]
__se_sys_syslog kernel/printk/printk.c:1875 [inline]
__x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1875
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f52b17cba37
Code: 73 01 c3 48 8b 0d c1 f3 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 f3 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe6ef892c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007f52b196b490 RCX: 00007f52b17cba37
RDX: 00000000000003ff RSI: 00007f52b196b490 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000206 R12: 00007f52b196b490
R13: 00007f52b1948dfe R14: 00007f52b196b881 R15: 00007f52b196b881
----------------
Code disassembly (best guess):
0: 24 65 and $0x65,%al
2: 48 8b 0c 25 08 50 a0 mov 0xffffffff92a05008,%rcx
9: 92
a: 65 8b 15 a8 1c e0 10 mov %gs:0x10e01ca8(%rip),%edx # 0x10e01cb9
11: 81 e2 00 01 ff 00 and $0xff0100,%edx
17: 74 11 je 0x2a
19: 81 fa 00 01 00 00 cmp $0x100,%edx
1f: 75 35 jne 0x56
21: 83 b9 3c 16 00 00 00 cmpl $0x0,0x163c(%rcx)
28: 74 2c je 0x56
* 2a: 8b 91 18 16 00 00 mov 0x1618(%rcx),%edx <-- trapping instruction
30: 83 fa 02 cmp $0x2,%edx
33: 75 21 jne 0x56
35: 48 8b 91 20 16 00 00 mov 0x1620(%rcx),%rdx
3c: 48 8b 32 mov (%rdx),%rsi
3f: 48 rex.W