rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=cf9/1/0x4000000000000000 softirq=45066/45066 fqs=1
(detected by 1, t=10504 jiffies, g=61497, q=144 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18260 Comm: syz-executor.0 Not tainted 5.19.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x262/0x5660 kernel/locking/lockdep.c:4988
Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 84 d2 74 09 80 fa 03 0f 8e 3d 13 00 00 41 0f b7 44 24 20 49 8d 7c 24 08 <48> 89 fa 48 c1 ea 03 66 25 00 e0 09 c8 66 41 89 44 24 20 48 b8 00
RSP: 0018:ffffc90000007b80 EFLAGS: 00000046
RAX: 0000000000004b0a RBX: ffffffff8bd867e0 RCX: 0000000000000028
RDX: 0000000000000000 RSI: 0000000000000028 RDI: ffff888025628a90
RBP: 0000000000000000 R08: 1ffff11004ac5150 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888025628a88
R13: ffff888025628000 R14: 0000000000000002 R15: 0000000000000001
FS: 0000555555ae1400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9128f08a00 CR3: 000000004a65d000 CR4: 0000000000350ef0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
rcu_lock_acquire include/linux/rcupdate.h:269 [inline]
rcu_read_lock include/linux/rcupdate.h:695 [inline]
advance_sched+0x4a5/0x9a0 net/sched/sch_taprio.c:768
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x30 kernel/rcu/update.c:280
Code: c7 e0 78 cc 89 e8 20 0d 00 00 65 c7 05 4d 61 8b 76 00 00 00 00 eb bc e8 4e fb ff ff eb bc cc cc cc cc cc cc cc cc cc cc cc cc <8b> 05 96 61 44 04 85 c0 74 21 8b 05 2c 94 44 04 85 c0 74 17 65 48
RSP: 0018:ffffc9000d5c7d20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815e52e1
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8dbb7850
RBP: 1ffff92001ab8fa9 R08: 0000000000000000 R09: ffffffff8dbb7857
R10: fffffbfff1b76f0a R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff81dbd175 R14: 0000000000000002 R15: ffff888048981100
rcu_read_lock_held_common kernel/rcu/update.c:104 [inline]
rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x560/0x780 kernel/locking/lockdep.c:5676
rcu_lock_release include/linux/rcupdate.h:274 [inline]
rcu_read_unlock include/linux/rcupdate.h:728 [inline]
dput+0x1a3/0xdb0 fs/dcache.c:901
path_put fs/namei.c:558 [inline]
done_path_create fs/namei.c:3798 [inline]
do_symlinkat+0x166/0x2e0 fs/namei.c:4373
__do_sys_symlinkat fs/namei.c:4387 [inline]
__se_sys_symlinkat fs/namei.c:4384 [inline]
__x64_sys_symlinkat+0x93/0xc0 fs/namei.c:4384
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f9128e88a17
Code: 73 01 c3 48 c7 c1 b8 ff ff ff 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 0a 01 00 00 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:00007ffd81ff6ec8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9128e88a17
RDX: 00007f9128ee3159 RSI: 00000000ffffff9c RDI: 00007ffd81ff6f90
RBP: 0000000000000001 R08: 0000000000004000 R09: 00007ffd81ff6d60
R10: 00007ffd81ff6c17 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd81ff6f90
rcu: rcu_preempt kthread timer wakeup didn't happen for 10500 jiffies! g61497 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=30897
rcu: rcu_preempt kthread starved for 10501 jiffies! g61497 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:28008 pid: 17 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0xa00/0x4b30 kernel/sched/core.c:6428
schedule+0xd2/0x1f0 kernel/sched/core.c:6500
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1999
----------------
Code disassembly (best guess):
0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
7: fc ff df
a: 48 c1 ea 03 shr $0x3,%rdx
e: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
12: 84 d2 test %dl,%dl
14: 74 09 je 0x1f
16: 80 fa 03 cmp $0x3,%dl
19: 0f 8e 3d 13 00 00 jle 0x135c
1f: 41 0f b7 44 24 20 movzwl 0x20(%r12),%eax
25: 49 8d 7c 24 08 lea 0x8(%r12),%rdi
* 2a: 48 89 fa mov %rdi,%rdx <-- trapping instruction
2d: 48 c1 ea 03 shr $0x3,%rdx
31: 66 25 00 e0 and $0xe000,%ax
35: 09 c8 or %ecx,%eax
37: 66 41 89 44 24 20 mov %ax,0x20(%r12)
3d: 48 rex.W
3e: b8 .byte 0xb8