Message-ID: <0000000000004696ac0614900f54@google.com>
Date: Tue, 26 Mar 2024 06:13:44 -0700
From: syzbot <syzbot+27b586a74c69839e9bba@...kaller.appspotmail.com>
To: frederic@...nel.org, linux-kernel@...r.kernel.org, mingo@...nel.org, 
	syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: Re: [syzbot] [kernel?] inconsistent lock state in sock_map_delete_elem

syzbot has found a reproducer for the following issue on:

HEAD commit:    fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1297023a180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=aef2a55903e5791c
dashboard link: https://syzkaller.appspot.com/bug?extid=27b586a74c69839e9bba
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=13534231180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12201aa5180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/089e25869df5/disk-fe46a7dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/423b1787914f/vmlinux-fe46a7dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4c043e30c07d/bzImage-fe46a7dd.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+27b586a74c69839e9bba@...kaller.appspotmail.com

================================
WARNING: inconsistent lock state
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
syz-executor298/5057 [HC0[0]:SC0[0]:HE0:SE1] takes:
ffff8880b943e698 (&rq->__lock){?.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
{IN-HARDIRQ-W} state was registered at:
  lock_acquire kernel/locking/lockdep.c:5754 [inline]
  lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
  _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
  raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
  raw_spin_rq_lock kernel/sched/sched.h:1385 [inline]
  rq_lock kernel/sched/sched.h:1699 [inline]
  scheduler_tick+0xa2/0x650 kernel/sched/core.c:5679
  update_process_times+0x199/0x220 kernel/time/timer.c:2481
  tick_periodic+0x7e/0x230 kernel/time/tick-common.c:100
  tick_handle_periodic+0x45/0x120 kernel/time/tick-common.c:112
  timer_interrupt+0x4e/0x80 arch/x86/kernel/time.c:57
  __handle_irq_event_percpu+0x22c/0x750 kernel/irq/handle.c:158
  handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
  handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
  handle_level_irq+0x25d/0x6f0 kernel/irq/chip.c:648
  generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
  handle_irq arch/x86/kernel/irq.c:238 [inline]
  __common_interrupt+0xe1/0x250 arch/x86/kernel/irq.c:257
  common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247
  asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
  __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
  _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
  __setup_irq+0x1069/0x1e80 kernel/irq/manage.c:1818
  request_threaded_irq+0x2b4/0x3e0 kernel/irq/manage.c:2202
  request_irq include/linux/interrupt.h:168 [inline]
  setup_default_timer_irq arch/x86/kernel/time.c:70 [inline]
  hpet_time_init+0x5b/0x90 arch/x86/kernel/time.c:82
  x86_late_time_init+0x51/0xc0 arch/x86/kernel/time.c:94
  start_kernel+0x317/0x490 init/main.c:1039
  x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:509
  x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:490
  common_startup_64+0x13e/0x148
irq event stamp: 2112
hardirqs last  enabled at (2109): [<ffffffff8ad251cb>] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351
hardirqs last disabled at (2110): [<ffffffff8ad48b14>] __schedule+0x2644/0x5c70 kernel/sched/core.c:6634
softirqs last  enabled at (2112): [<ffffffff88cb3a2d>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (2112): [<ffffffff88cb3a2d>] __sock_map_delete net/core/sock_map.c:424 [inline]
softirqs last  enabled at (2112): [<ffffffff88cb3a2d>] sock_map_delete_elem+0xfd/0x150 net/core/sock_map.c:446
softirqs last disabled at (2111): [<ffffffff88cb39f8>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (2111): [<ffffffff88cb39f8>] __sock_map_delete net/core/sock_map.c:414 [inline]
softirqs last disabled at (2111): [<ffffffff88cb39f8>] sock_map_delete_elem+0xc8/0x150 net/core/sock_map.c:446

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&rq->__lock
);
  <Interrupt>
    lock(&rq->__lock
);

 *** DEADLOCK ***

6 locks held by syz-executor298/5057:
 #0: ffffffff8d8265a8
 (tracepoints_mutex
){+.+.}-{3:3}
, at: tracepoint_probe_register_prio_may_exist+0x9c/0x110 kernel/tracepoint.c:478
 #1: 
ffffffff8d653cb0
 (cpu_hotplug_lock
){++++}-{0:0}
, at: static_key_enable+0x12/0x20 kernel/jump_label.c:217
 #2: ffffffff8d8bbc08
 (jump_label_mutex
){+.+.}-{3:3}
, at: jump_label_lock kernel/jump_label.c:27 [inline]
, at: static_key_enable_cpuslocked+0xb5/0x270 kernel/jump_label.c:202
 #3: ffffffff8d671328
 (text_mutex
){+.+.}-{3:3}
, at: arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:145
 #4: ffff8880b943e698
 (&rq->__lock
){?.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
 #5: ffffffff8d7b08e0
 (rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
, at: bpf_trace_run4+0x107/0x460 kernel/trace/bpf_trace.c:2422

stack backtrace:
CPU: 0 PID: 5057 Comm: syz-executor298 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_usage_bug kernel/locking/lockdep.c:3971 [inline]
 valid_state kernel/locking/lockdep.c:4013 [inline]
 mark_lock_irq kernel/locking/lockdep.c:4216 [inline]
 mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678
 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline]
 lockdep_hardirqs_on_prepare+0x137/0x420 kernel/locking/lockdep.c:4359
 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61
 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:387
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 __sock_map_delete net/core/sock_map.c:424 [inline]
 sock_map_delete_elem+0xfd/0x150 net/core/sock_map.c:446


---
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.

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