Message-ID: <00000000000002a89b06146e6ecb@google.com>
Date: Sun, 24 Mar 2024 14:06:24 -0700
From: syzbot <syzbot+bacb240dbeebb88518ae@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	tglx@...utronix.de
Subject: [syzbot] [kernel?] possible deadlock in __hrtimer_run_queues (2)

Hello,

syzbot found 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=17b8bbb9180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fe78468a74fdc3b7
dashboard link: https://syzkaller.appspot.com/bug?extid=bacb240dbeebb88518ae
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0f7abe4afac7/disk-fe46a7dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/82598d09246c/vmlinux-fe46a7dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/efa23788c875/bzImage-fe46a7dd.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bacb240dbeebb88518ae@...kaller.appspotmail.com

------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
------------------------------------------------------
kswapd0/88 is trying to acquire lock:
ffffffff8e126300 (console_owner){-...}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1997 [inline]
ffffffff8e126300 (console_owner){-...}-{0:0}, at: vprintk_emit+0x3d6/0x770 kernel/printk/printk.c:2341

but task is already holding lock:
ffff8880b952c8d8 (hrtimer_bases.lock){-.-.}-{2:2}, at: __run_hrtimer kernel/time/hrtimer.c:1696 [inline]
ffff8880b952c8d8 (hrtimer_bases.lock){-.-.}-{2:2}, at: __hrtimer_run_queues+0x65a/0xd00 kernel/time/hrtimer.c:1756

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (hrtimer_bases.lock){-.-.}-{2:2}:
       lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       lock_hrtimer_base kernel/time/hrtimer.c:175 [inline]
       hrtimer_start_range_ns+0xdf/0xc60 kernel/time/hrtimer.c:1303
       rpm_suspend+0x12c2/0x1780 drivers/base/power/runtime.c:606
       __pm_runtime_idle+0x131/0x1a0 drivers/base/power/runtime.c:1104
       pm_runtime_put include/linux/pm_runtime.h:448 [inline]
       __device_attach+0x3e5/0x520 drivers/base/dd.c:1048
       bus_probe_device+0x189/0x260 drivers/base/bus.c:532
       device_add+0x8ff/0xca0 drivers/base/core.c:3639
       serdev_controller_add+0x83/0x660 drivers/tty/serdev/core.c:782
       serdev_tty_port_register+0x163/0x260 drivers/tty/serdev/serdev-ttyport.c:302
       tty_port_register_device_attr_serdev+0xe1/0x160 drivers/tty/tty_port.c:191
       serial_core_add_one_port drivers/tty/serial/serial_core.c:3191 [inline]
       serial_core_register_port+0xee0/0x1e30 drivers/tty/serial/serial_core.c:3398
       serial8250_register_8250_port+0x1433/0x1cd0 drivers/tty/serial/8250/8250_core.c:1138
       serial_pnp_probe+0x7d5/0xa20 drivers/tty/serial/8250/8250_pnp.c:478
       pnp_device_probe+0x2bc/0x460 drivers/pnp/driver.c:111
       really_probe+0x2a0/0xc50 drivers/base/dd.c:658
       __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
       driver_probe_device+0x50/0x430 drivers/base/dd.c:830
       __driver_attach+0x45f/0x710 drivers/base/dd.c:1216
       bus_for_each_dev+0x23b/0x2b0 drivers/base/bus.c:368
       bus_add_driver+0x347/0x620 drivers/base/bus.c:673
       driver_register+0x23a/0x320 drivers/base/driver.c:246
       serial8250_init+0x9e/0x170 drivers/tty/serial/8250/8250_core.c:1239
       do_one_initcall+0x23a/0x830 init/main.c:1241
       do_initcall_level+0x157/0x210 init/main.c:1303
       do_initcalls+0x3f/0x80 init/main.c:1319
       kernel_init_freeable+0x435/0x5d0 init/main.c:1550
       kernel_init+0x1d/0x2a0 init/main.c:1439
       ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

-> #2 (&dev->power.lock){-...}-{2:2}:
       lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       __pm_runtime_resume+0x112/0x180 drivers/base/power/runtime.c:1171
       pm_runtime_get include/linux/pm_runtime.h:396 [inline]
       __uart_start+0x17a/0x3c0 drivers/tty/serial/serial_core.c:148
       uart_write+0x427/0x5c0 drivers/tty/serial/serial_core.c:615
       process_output_block drivers/tty/n_tty.c:574 [inline]
       n_tty_write+0xd6c/0x1230 drivers/tty/n_tty.c:2379
       iterate_tty_write drivers/tty/tty_io.c:1021 [inline]
       file_tty_write+0x551/0x9b0 drivers/tty/tty_io.c:1096
       call_write_iter include/linux/fs.h:2108 [inline]
       new_sync_write fs/read_write.c:497 [inline]
       vfs_write+0xa86/0xcb0 fs/read_write.c:590
       ksys_write+0x1a0/0x2c0 fs/read_write.c:643
       do_syscall_64+0xfd/0x240
       entry_SYSCALL_64_after_hwframe+0x6d/0x75

-> #1 (&port_lock_key){-.-.}-{2:2}:
       lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       uart_port_lock_irqsave include/linux/serial_core.h:616 [inline]
       serial8250_console_write+0x1a8/0x1840 drivers/tty/serial/8250/8250_port.c:3403
       console_emit_next_record kernel/printk/printk.c:2907 [inline]
       console_flush_all+0x867/0xfd0 kernel/printk/printk.c:2973
       console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3042
       vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2342
       _printk+0xd5/0x120 kernel/printk/printk.c:2367
       register_console+0x70a/0xcd0 kernel/printk/printk.c:3548
       univ8250_console_init+0x49/0x50 drivers/tty/serial/8250/8250_core.c:717
       console_init+0x198/0x680 kernel/printk/printk.c:3694
       start_kernel+0x2d3/0x500 init/main.c:1012
       x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:509
       x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:490
       common_startup_64+0x13e/0x147

-> #0 (console_owner
){-...}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
       __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
       lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
       console_trylock_spinning kernel/printk/printk.c:1997 [inline]
       vprintk_emit+0x3f3/0x770 kernel/printk/printk.c:2341
       _printk+0xd5/0x120 kernel/printk/printk.c:2367
       __report_bug lib/bug.c:195 [inline]
       report_bug+0x346/0x500 lib/bug.c:219
       handle_bug+0x3e/0x70 arch/x86/kernel/traps.c:239
       exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:260
       asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
       __local_bh_disable_ip+0x1f6/0x220 kernel/softirq.c:307
       __raw_spin_lock_bh include/linux/spinlock_api_smp.h:125 [inline]
       _raw_spin_lock_bh+0x1c/0x50 kernel/locking/spinlock.c:178
       spin_lock_bh include/linux/spinlock.h:356 [inline]
       __sock_map_delete net/core/sock_map.c:414 [inline]
       sock_map_delete_elem+0x97/0x140 net/core/sock_map.c:446
       bpf_prog_2c29ac5cdc6b1842+0x42/0x4a
       bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
       __bpf_prog_run include/linux/filter.h:657 [inline]
       bpf_prog_run include/linux/filter.h:664 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
       bpf_trace_run4+0x25c/0x490 kernel/trace/bpf_trace.c:2422
       trace_mm_page_alloc include/trace/events/kmem.h:177 [inline]
       __alloc_pages+0x657/0x680 mm/page_alloc.c:4591
       __alloc_pages_node include/linux/gfp.h:238 [inline]
       alloc_pages_node include/linux/gfp.h:261 [inline]
       alloc_slab_page+0x5f/0x160 mm/slub.c:2175
       allocate_slab mm/slub.c:2338 [inline]
       new_slab+0x84/0x2f0 mm/slub.c:2391
       ___slab_alloc+0xc73/0x1260 mm/slub.c:3525
       __slab_alloc mm/slub.c:3610 [inline]
       __slab_alloc_node mm/slub.c:3663 [inline]
       slab_alloc_node mm/slub.c:3835 [inline]
       kmem_cache_alloc+0x252/0x340 mm/slub.c:3852
       kmem_cache_zalloc include/linux/slab.h:739 [inline]
       fill_pool lib/debugobjects.c:168 [inline]
       debug_objects_fill_pool+0x52b/0x9b0 lib/debugobjects.c:615
       debug_object_activate+0x135/0x510 lib/debugobjects.c:704
       debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
       debug_activate kernel/time/hrtimer.c:478 [inline]
       enqueue_hrtimer+0x30/0x3a0 kernel/time/hrtimer.c:1090
       __run_hrtimer kernel/time/hrtimer.c:1709 [inline]
       __hrtimer_run_queues+0x6b5/0xd00 kernel/time/hrtimer.c:1756
       hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
       local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
       __sysvec_apic_timer_interrupt+0x109/0x3a0 arch/x86/kernel/apic/apic.c:1049
       instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
       sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
       srso_safe_ret+0x0/0x20
       srso_return_thunk+0x5/0x5f arch/x86/lib/retpoline.S:222
       unwind_next_frame+0xc1/0x2a00 arch/x86/kernel/unwind_orc.c:479
       __unwind_start+0x641/0x7c0 arch/x86/kernel/unwind_orc.c:760
       unwind_start arch/x86/include/asm/unwind.h:64 [inline]
       arch_stack_walk+0x103/0x1b0 arch/x86/kernel/stacktrace.c:24
       stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
       kasan_save_stack mm/kasan/common.c:47 [inline]
       kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
       unpoison_slab_object mm/kasan/common.c:312 [inline]
       __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
       kasan_slab_alloc include/linux/kasan.h:201 [inline]
       slab_post_alloc_hook mm/slub.c:3798 [inline]
       slab_alloc_node mm/slub.c:3845 [inline]
       kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
       kmem_cache_zalloc include/linux/slab.h:739 [inline]
       fill_pool lib/debugobjects.c:168 [inline]
       debug_objects_fill_pool+0x4ec/0x9b0 lib/debugobjects.c:615
       debug_object_activate+0x135/0x510 lib/debugobjects.c:704
       debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
       __call_rcu_common kernel/rcu/tree.c:2719 [inline]
       call_rcu+0x97/0xa70 kernel/rcu/tree.c:2838
       __dentry_kill+0x20d/0x630 fs/dcache.c:603
       shrink_kill+0xa9/0x2c0 fs/dcache.c:1048
       shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1075
       prune_dcache_sb+0x10f/0x180 fs/dcache.c:1156
       super_cache_scan+0x34f/0x4b0 fs/super.c:221
       do_shrink_slab+0x6d2/0x1140 mm/shrinker.c:435
       shrink_slab+0x1092/0x14d0 mm/shrinker.c:662
       shrink_one+0x423/0x7f0 mm/vmscan.c:4767
       shrink_many mm/vmscan.c:4828 [inline]
       lru_gen_shrink_node mm/vmscan.c:4929 [inline]
       shrink_node+0x37b8/0x3e70 mm/vmscan.c:5888
       kswapd_shrink_node mm/vmscan.c:6696 [inline]
       balance_pgdat mm/vmscan.c:6886 [inline]
       kswapd+0x17d1/0x36e0 mm/vmscan.c:7146
       kthread+0x2f2/0x390 kernel/kthread.c:388
       ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

other info that might help us debug this:

Chain exists of:
  console_owner
 --> &dev->power.lock --> hrtimer_bases.lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(hrtimer_bases.lock);
                               lock(
&dev->power.lock);
                               lock(hrtimer_bases.lock);
  lock(console_owner);

 *** DEADLOCK ***

6 locks held by kswapd0/88:
 #0: ffffffff8e21f720
 (fs_reclaim){+.+.}-{0:0}
, at: balance_pgdat mm/vmscan.c:6774 [inline]
, at: kswapd+0xb3f/0x36e0 mm/vmscan.c:7146
 #1: 
ffff88802f9d80e0 (&type->s_umount_key#52){.+.+}-{3:3}
, at: super_trylock_shared fs/super.c:561 [inline]
, at: super_cache_scan+0x94/0x4b0 fs/super.c:196
 #2: ffffffff8e81bb40
 (fill_pool_map-wait-type-override){+.+.}-{3:3}
, at: debug_objects_fill_pool+0x80/0x9b0 lib/debugobjects.c:614
 #3: ffff8880b952c8d8
 (hrtimer_bases.lock){-.-.}-{2:2}
, at: __run_hrtimer kernel/time/hrtimer.c:1696 [inline]
, at: __hrtimer_run_queues+0x65a/0xd00 kernel/time/hrtimer.c:1756
 #4: ffffffff8e81bb40
 (fill_pool_map-wait-type-override){+.+.}-{3:3}
, at: debug_objects_fill_pool+0x80/0x9b0 lib/debugobjects.c:614
 #5: ffffffff8e132020 (
rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16e/0x490 kernel/trace/bpf_trace.c:2422

stack backtrace:
CPU: 1 PID: 88 Comm: kswapd0 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:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
 console_trylock_spinning kernel/printk/printk.c:1997 [inline]
 vprintk_emit+0x3f3/0x770 kernel/printk/printk.c:2341
 _printk+0xd5/0x120 kernel/printk/printk.c:2367
 __report_bug lib/bug.c:195 [inline]
 report_bug+0x346/0x500 lib/bug.c:219
 handle_bug+0x3e/0x70 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:260
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
RIP: 0010:__local_bh_disable_ip+0x1f6/0x220 kernel/softirq.c:307
Code: 2c 0b 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 80 00 00 00 75 33 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 5b dd 25 0a 90 <0f> 0b 90 e9 99 fe ff ff e8 cd d4 1a 0a 41 f7 c6 00 02 00 00 0f 85
RSP: 0018:ffffc90000a085a0 EFLAGS: 00010006
RAX: 0000000080010003 RBX: ffffffff89640087 RCX: ffff888019f13c00
RDX: ffff888019f13c00 RSI: 0000000000000201 RDI: ffffffff89640087
RBP: ffffc90000a08668 R08: ffffffff8964004d R09: 1ffffffff259caa0
R10: dffffc0000000000 R11: ffffffffa0000824 R12: dffffc0000000000
R13: 1ffff920001410b8 R14: ffffc90000a08600 R15: 0000000000000201
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:125 [inline]
 _raw_spin_lock_bh+0x1c/0x50 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 __sock_map_delete net/core/sock_map.c:414 [inline]
 sock_map_delete_elem+0x97/0x140 net/core/sock_map.c:446
 bpf_prog_2c29ac5cdc6b1842+0x42/0x4a
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run4+0x25c/0x490 kernel/trace/bpf_trace.c:2422
 trace_mm_page_alloc include/trace/events/kmem.h:177 [inline]
 __alloc_pages+0x657/0x680 mm/page_alloc.c:4591
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page+0x5f/0x160 mm/slub.c:2175
 allocate_slab mm/slub.c:2338 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2391
 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525
 __slab_alloc mm/slub.c:3610 [inline]
 __slab_alloc_node mm/slub.c:3663 [inline]
 slab_alloc_node mm/slub.c:3835 [inline]
 kmem_cache_alloc+0x252/0x340 mm/slub.c:3852
 kmem_cache_zalloc include/linux/slab.h:739 [inline]
 fill_pool lib/debugobjects.c:168 [inline]
 debug_objects_fill_pool+0x52b/0x9b0 lib/debugobjects.c:615
 debug_object_activate+0x135/0x510 lib/debugobjects.c:704
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x30/0x3a0 kernel/time/hrtimer.c:1090
 __run_hrtimer kernel/time/hrtimer.c:1709 [inline]
 __hrtimer_run_queues+0x6b5/0xd00 kernel/time/hrtimer.c:1756
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x109/0x3a0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:srso_safe_ret+0x0/0x20 arch/x86/lib/retpoline.S:208
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 b8 <48> 8d 64 24 08 c3 cc cc 0f ae e8 e8 f0 ff ff ff 0f 0b 66 2e 0f 1f
RSP: 0018:ffffc9000250e970 EFLAGS: 00000246
RAX: 1ffff110033e2a18 RBX: ffffc9000250eaf8 RCX: ffffffff8b7f3c00
RDX: ffff888019f13c00 RSI: 0000000000000001 RDI: ffffffff81409031
RBP: ffffc9000250eac0 R08: ffffffff81409011 R09: 0000000000000000
R10: ffffc9000250eac0 R11: fffff520004a1d64 R12: ffffc9000250eb58
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffffff8140c1ec
 srso_return_thunk+0x5/0x5f arch/x86/lib/retpoline.S:222
 unwind_next_frame+0xc1/0x2a00 arch/x86/kernel/unwind_orc.c:479


---
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#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

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