Message-ID: <00000000000068ed3b060a0f1517@google.com>
Date:   Mon, 13 Nov 2023 13:09:20 -0800
From:   syzbot <syzbot+6f49826383204e367d67@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [mm?] BUG: spinlock recursion in try_to_wake_up

Hello,

syzbot found the following issue on:

HEAD commit:    6bc986ab839c Merge tag 'nfs-for-6.7-1' of git://git.linux-..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=163b5f90e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cd456c5e6582895e
dashboard link: https://syzkaller.appspot.com/bug?extid=6f49826383204e367d67
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15b34e04e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1308dc0f680000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-6bc986ab.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3ff7887a8f39/vmlinux-6bc986ab.xz
kernel image: https://storage.googleapis.com/syzbot-assets/60418843207c/bzImage-6bc986ab.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6f49826383204e367d67@...kaller.appspotmail.com

BUG: spinlock recursion on CPU#0, syz-executor110/7601
 lock: 0xffff88806b63c740, .magic: dead4ead, .owner: syz-executor110/7601, .owner_cpu: 1
CPU: 0 PID: 7601 Comm: syz-executor110 Tainted: G      D            6.6.0-syzkaller-15494-g6bc986ab839c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
 do_raw_spin_lock+0x237/0x2b0 kernel/locking/spinlock_debug.c:114
 raw_spin_rq_lock_nested kernel/sched/core.c:566 [inline]
 raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:551
 raw_spin_rq_lock kernel/sched/sched.h:1349 [inline]
 rq_lock kernel/sched/sched.h:1663 [inline]
 ttwu_queue kernel/sched/core.c:4019 [inline]
 try_to_wake_up+0x654/0x15d0 kernel/sched/core.c:4342
 kick_pool+0x253/0x460 kernel/workqueue.c:1142
 __queue_work+0x5d9/0x1050 kernel/workqueue.c:1800
 call_timer_fn+0x193/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1746 [inline]
 __run_timers+0x585/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x21a/0x968 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721
Code: c1 05 8d 88 9a 7e 83 f8 01 0f 85 b0 02 00 00 9c 58 f6 c4 02 0f 85 9b 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000b427420 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92001684e86 RCX: 0000000000000001
RDX: 1ffff1100526d3a7 RSI: ffffffff8accaca0 RDI: ffffffff8b2ec600
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23e25d8
R10: ffffffff91f12ec7 R11: dffffc0000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88806b636e80 R15: 0000000000000000
 local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 folio_add_lru+0x2b2/0x7d0 mm/swap.c:515
 folio_add_lru_vma+0xb0/0x100 mm/swap.c:537
 wp_page_copy mm/memory.c:3189 [inline]
 do_wp_page+0x19fa/0x3a70 mm/memory.c:3510
 handle_pte_fault mm/memory.c:5054 [inline]
 __handle_mm_fault+0x1d7c/0x3d60 mm/memory.c:5179
 handle_mm_fault+0x478/0xa00 mm/memory.c:5344
 do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
RIP: 0010:raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
RIP: 0010:copy_to_user_iter lib/iov_iter.c:25 [inline]
RIP: 0010:iterate_iovec include/linux/iov_iter.h:51 [inline]
RIP: 0010:iterate_and_advance2 include/linux/iov_iter.h:247 [inline]
RIP: 0010:iterate_and_advance include/linux/iov_iter.h:271 [inline]
RIP: 0010:_copy_to_iter+0x4c7/0x11d0 lib/iov_iter.c:186
Code: 45 e8 8d 37 27 fd 48 8b 4c 24 18 89 ee 48 8b 44 24 28 4c 8d 34 01 4c 89 f7 e8 e5 6e 7d fd 0f 01 cb 48 89 e9 4c 89 ff 4c 89 f6 <f3> a4 0f 1f 00 0f 01 ca 48 89 e8 48 29 eb 48 29 c8 48 01 cb 48 01
RSP: 0018:ffffc9000b427970 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000e80
RDX: 0000000000000000 RSI: ffff888010b19180 RDI: 0000000020755000
RBP: 0000000000001000 R08: 0000000000000000 R09: ffffed10021633ff
R10: ffff888010b19fff R11: 0000000000000000 R12: 0000000000754b80
R13: ffffc9000b427d60 R14: ffff888010b19000 R15: 0000000020754e80
 copy_page_to_iter lib/iov_iter.c:381 [inline]
 copy_page_to_iter+0xf1/0x180 lib/iov_iter.c:368
 process_vm_rw_pages mm/process_vm_access.c:45 [inline]
 process_vm_rw_single_vec mm/process_vm_access.c:117 [inline]
 process_vm_rw_core.constprop.0+0x5cd/0xa10 mm/process_vm_access.c:215
 process_vm_rw+0x2ff/0x360 mm/process_vm_access.c:283
 __do_sys_process_vm_readv mm/process_vm_access.c:295 [inline]
 __se_sys_process_vm_readv mm/process_vm_access.c:291 [inline]
 __x64_sys_process_vm_readv+0xe2/0x1b0 mm/process_vm_access.c:291
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd00a215259
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd00a1d3228 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007fd00a29c308 RCX: 00007fd00a215259
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 0000000000001db0
RBP: 00007fd00a29c300 R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 00007fd00a269074
R13: 0000000000000000 R14: 00007ffec3c6eb10 R15: 00007ffec3c6ebf8
 </TASK>
----------------
Code disassembly (best guess):
   0:	c1 05 8d 88 9a 7e 83 	roll   $0x83,0x7e9a888d(%rip)        # 0x7e9a8894
   7:	f8                   	clc
   8:	01 0f                	add    %ecx,(%rdi)
   a:	85 b0 02 00 00 9c    	test   %esi,-0x63fffffe(%rax)
  10:	58                   	pop    %rax
  11:	f6 c4 02             	test   $0x2,%ah
  14:	0f 85 9b 02 00 00    	jne    0x2b5
  1a:	48 85 ed             	test   %rbp,%rbp
  1d:	74 01                	je     0x20
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2d:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  34:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3b:	00
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

Powered by blists - more mailing lists