syzbot


possible deadlock in __hrtimer_run_queues (2)

Status: upstream: reported C repro on 2024/03/24 21:06
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+bacb240dbeebb88518ae@syzkaller.appspotmail.com
First crash: 27d, last: 1d14h
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [kernel?] possible deadlock in __hrtimer_run_queues (2) 1 (3) 2024/03/26 10:32
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in __hrtimer_run_queues (2) C 2 7d09h 14d 0/3 upstream: reported C repro on 2024/04/02 19:14
linux-5.15 possible deadlock in __hrtimer_run_queues 3 323d 334d 0/3 auto-obsoleted due to no activity on 2023/09/06 10:20
upstream possible deadlock in __hrtimer_run_queues kernel 24 311d 340d 0/26 auto-obsoleted due to no activity on 2023/08/23 09:03
linux-6.1 possible deadlock in __hrtimer_run_queues 1 329d 329d 0/3 auto-obsoleted due to no activity on 2023/08/31 12:31
linux-5.15 possible deadlock in __hrtimer_run_queues (2) 2 15d 19d 0/3 upstream: reported on 2024/03/28 04:51

Sample crash report:
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.8.0-syzkaller-05204-g237bb5f7f7f5 #0 Not tainted
------------------------------------------------------
syz-executor141/5062 is trying to acquire lock:
ffffffff8e125be0 (console_owner){-...}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1951 [inline]
ffffffff8e125be0 (console_owner){-...}-{0:0}, at: vprintk_emit+0x33e/0x720 kernel/printk/printk.c:2291

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+0x1725/0x1c10 drivers/base/power/runtime.c:605
       __pm_runtime_idle+0x131/0x1a0 drivers/base/power/runtime.c:1103
       pm_runtime_put include/linux/pm_runtime.h:460 [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+0x2f/0x4b0 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+0x2ba/0x460 drivers/pnp/driver.c:111
       really_probe+0x29e/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+0x239/0x2b0 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+0x238/0x830 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:1557
       kernel_init+0x1d/0x2a0 init/main.c:1446
       ret_from_fork+0x4b/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:1170
       pm_runtime_get include/linux/pm_runtime.h:408 [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+0xd6a/0x1230 drivers/tty/n_tty.c:2379
       iterate_tty_write drivers/tty/tty_io.c:1021 [inline]
       file_tty_write+0x54f/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+0xa84/0xcb0 fs/read_write.c:590
       ksys_write+0x1a0/0x2c0 fs/read_write.c:643
       do_syscall_64+0xfb/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:2890 [inline]
       console_flush_all+0x80b/0xec0 kernel/printk/printk.c:2956
       console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3025
       vprintk_emit+0x509/0x720 kernel/printk/printk.c:2292
       _printk+0xd5/0x120 kernel/printk/printk.c:2317
       register_console+0x70a/0xcd0 kernel/printk/printk.c:3531
       univ8250_console_init+0x49/0x50 drivers/tty/serial/8250/8250_core.c:717
       console_init+0x198/0x680 kernel/printk/printk.c:3677
       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:1951 [inline]
       vprintk_emit+0x35b/0x720 kernel/printk/printk.c:2291
       _printk+0xd5/0x120 kernel/printk/printk.c:2317
       __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_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939
       bpf_prog_8b502551ebbde0c1+0x42/0x4b
       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_run2+0x204/0x420 kernel/trace/bpf_trace.c:2420
       trace_hrtimer_start include/trace/events/timer.h:222 [inline]
       debug_activate kernel/time/hrtimer.c:479 [inline]
       enqueue_hrtimer+0x335/0x3a0 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+0x107/0x3a0 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
       unwind_get_return_address+0x3f/0xc0 arch/x86/kernel/unwind_orc.c:369
       arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
       stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
       save_stack+0xfb/0x1f0 mm/page_owner.c:129
       __reset_page_owner+0x44/0x2d0 mm/page_owner.c:150
       reset_page_owner include/linux/page_owner.h:24 [inline]
       free_pages_prepare mm/page_alloc.c:1140 [inline]
       free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
       free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
       release_pages+0x2744/0x2a80 mm/swap.c:1042
       tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
       tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
       tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300
       tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
       exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
       __mmput+0x115/0x3c0 kernel/fork.c:1345
       exit_mm+0x220/0x310 kernel/exit.c:569
       do_exit+0x99e/0x27e0 kernel/exit.c:865
       do_group_exit+0x207/0x2c0 kernel/exit.c:1027
       __do_sys_exit_group kernel/exit.c:1038 [inline]
       __se_sys_exit_group kernel/exit.c:1036 [inline]
       __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
       do_syscall_64+0xfb/0x240
       entry_SYSCALL_64_after_hwframe+0x6d/0x75

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 ***

4 locks held by syz-executor141/5062:
 #0: ffff888021b80b20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:108 [inline]
 #0: ffff888021b80b20 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x30f/0xd40 mm/mmap.c:3295
 #1: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #1: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #1: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: page_ext_get+0x20/0x2a0 mm/page_ext.c:508
 #2: ffff8880b952c8d8 (hrtimer_bases.lock){-.-.}-{2:2}, at: __run_hrtimer kernel/time/hrtimer.c:1696 [inline]
 #2: ffff8880b952c8d8 (hrtimer_bases.lock){-.-.}-{2:2}, at: __hrtimer_run_queues+0x65a/0xd00 kernel/time/hrtimer.c:1756
 #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
 #3: ffffffff8e131920 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x114/0x420 kernel/trace/bpf_trace.c:2420

stack backtrace:
CPU: 1 PID: 5062 Comm: syz-executor141 Not tainted 6.8.0-syzkaller-05204-g237bb5f7f7f5 #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+0x1e7/0x2e0 lib/dump_stack.c:106
 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:1951 [inline]
 vprintk_emit+0x35b/0x720 kernel/printk/printk.c:2291
 _printk+0xd5/0x120 kernel/printk/printk.c:2317
 __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 c3 cc cc cc cc 90 <0f> 0b 90 e9 99 fe ff ff e8 4d 84 16 0a 41 f7 c6 00 02 00 00 0f 85
RSP: 0018:ffffc90000a08b00 EFLAGS: 00010006
RAX: 0000000000010002 RBX: ffffffff895fc820 RCX: ffff88801e899e00
RDX: dffffc0000000000 RSI: 0000000000000201 RDI: ffffffff895fc820
RBP: ffffc90000a08bc8 R08: 0000000000000005 R09: ffffffff89600b3e
R10: 000000000000000c R11: ffff88801e899e00 R12: dffffc0000000000
R13: 1ffff92000141164 R14: ffffc90000a08b60 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_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939
 bpf_prog_8b502551ebbde0c1+0x42/0x4b
 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_run2+0x204/0x420 kernel/trace/bpf_trace.c:2420
 trace_hrtimer_start include/trace/events/timer.h:222 [inline]
 debug_activate kernel/time/hrtimer.c:479 [inline]
 enqueue_hrtimer+0x335/0x3a0 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+0x107/0x3a0 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:unwind_get_return_address+0x3f/0xc0 arch/x86/kernel/unwind_orc.c:369
Code: ff df e8 a4 62 54 00 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 72 8b 2b 31 ff 89 ee e8 c9 66 54 00 85 ed 74 4a 48 83 c3 48 <49> 89 df 49 c1 ef 03 43 80 3c 37 00 74 08 48 89 df e8 ab a6 b7 00
RSP: 0018:ffffc90003adf438 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffffc90003adf4a8 RCX: ffff88801e899e00
RDX: ffff88801e899e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81408de7 R09: ffffffff8140a8df
R10: 0000000000000003 R11: ffff88801e899e00 R12: ffff88801e899e00
R13: ffffffff8180dbc0 R14: dffffc0000000000 R15: ffffc90003adf460
 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:129
 __reset_page_owner+0x44/0x2d0 mm/page_owner.c:150
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
 release_pages+0x2744/0x2a80 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
 exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
 __mmput+0x115/0x3c0 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:569
 do_exit+0x99e/0x27e0 kernel/exit.c:865
 do_group_exit+0x207/0x2c0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f410f5eff09
Code: Unable to access opcode bytes at 0x7f410f5efedf.
RSP: 002b:00007fff28b1bb08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f410f5eff09
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f410f66b2b0 R08: ffffffffffffffb8 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f410f66b2b0
R13: 0000000000000000 R14: 00007f410f66bd00 R15: 00007f410f5c1160
 </TASK>
WARNING: CPU: 1 PID: 5062 at kernel/softirq.c:307 __local_bh_disable_ip+0x1f6/0x220 kernel/softirq.c:307
Modules linked in:
CPU: 1 PID: 5062 Comm: syz-executor141 Not tainted 6.8.0-syzkaller-05204-g237bb5f7f7f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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 c3 cc cc cc cc 90 <0f> 0b 90 e9 99 fe ff ff e8 4d 84 16 0a 41 f7 c6 00 02 00 00 0f 85
RSP: 0018:ffffc90000a08b00 EFLAGS: 00010006

RAX: 0000000000010002 RBX: ffffffff895fc820 RCX: ffff88801e899e00
RDX: dffffc0000000000 RSI: 0000000000000201 RDI: ffffffff895fc820
RBP: ffffc90000a08bc8 R08: 0000000000000005 R09: ffffffff89600b3e
R10: 000000000000000c R11: ffff88801e899e00 R12: dffffc0000000000
R13: 1ffff92000141164 R14: ffffc90000a08b60 R15: 0000000000000201
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f410f66c110 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __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_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939
 bpf_prog_8b502551ebbde0c1+0x42/0x4b
 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_run2+0x204/0x420 kernel/trace/bpf_trace.c:2420
 trace_hrtimer_start include/trace/events/timer.h:222 [inline]
 debug_activate kernel/time/hrtimer.c:479 [inline]
 enqueue_hrtimer+0x335/0x3a0 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+0x107/0x3a0 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:unwind_get_return_address+0x3f/0xc0 arch/x86/kernel/unwind_orc.c:369
Code: ff df e8 a4 62 54 00 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 72 8b 2b 31 ff 89 ee e8 c9 66 54 00 85 ed 74 4a 48 83 c3 48 <49> 89 df 49 c1 ef 03 43 80 3c 37 00 74 08 48 89 df e8 ab a6 b7 00
RSP: 0018:ffffc90003adf438 EFLAGS: 00000282

RAX: 0000000000000000 RBX: ffffc90003adf4a8 RCX: ffff88801e899e00
RDX: ffff88801e899e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81408de7 R09: ffffffff8140a8df
R10: 0000000000000003 R11: ffff88801e899e00 R12: ffff88801e899e00
R13: ffffffff8180dbc0 R14: dffffc0000000000 R15: ffffc90003adf460
 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:129
 __reset_page_owner+0x44/0x2d0 mm/page_owner.c:150
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
 release_pages+0x2744/0x2a80 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
 exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
 __mmput+0x115/0x3c0 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:569
 do_exit+0x99e/0x27e0 kernel/exit.c:865
 do_group_exit+0x207/0x2c0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f410f5eff09
Code: Unable to access opcode bytes at 0x7f410f5efedf.
RSP: 002b:00007fff28b1bb08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f410f5eff09
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f410f66b2b0 R08: ffffffffffffffb8 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f410f66b2b0
R13: 0000000000000000 R14: 00007f410f66bd00 R15: 00007f410f5c1160
 </TASK>
irq event stamp: 1168
hardirqs last  enabled at (1167): [<ffffffff82009291>] uncharge_batch+0x321/0x4f0 mm/memcontrol.c:7430
hardirqs last disabled at (1168): [<ffffffff8b6fdf0e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1043
softirqs last  enabled at (926): [<ffffffff81a4c4f1>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (926): [<ffffffff81a4c4f1>] bpf_link_settle+0x81/0x150 kernel/bpf/syscall.c:3181
softirqs last disabled at (924): [<ffffffff81a4c49a>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (924): [<ffffffff81a4c49a>] bpf_link_settle+0x2a/0x150 kernel/bpf/syscall.c:3179
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5062 at kernel/softirq.c:361 __local_bh_enable_ip+0x1ae/0x200 kernel/softirq.c:361
Modules linked in:
CPU: 1 PID: 5062 Comm: syz-executor141 Tainted: G        W          6.8.0-syzkaller-05204-g237bb5f7f7f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:__local_bh_enable_ip+0x1ae/0x200 kernel/softirq.c:361
Code: 04 1c 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 60 75 52 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 90 e9 ca fe ff ff e8 55 00 00 00 eb 9c 90 0f 0b 90 e9 fa fe
RSP: 0018:ffffc90000a08b20 EFLAGS: 00010006
RAX: 0000000000010203 RBX: 1ffff92000141168 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff895fc916
RBP: ffffc90000a08be0 R08: ffff8880213ce0e3 R09: 1ffff11004279c1c
R10: dffffc0000000000 R11: ffffed1004279c1d R12: dffffc0000000000
R13: 0000000000000006 R14: ffff888021ce4c00 R15: 0000000000000201
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f410f66c110 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 sock_hash_delete_elem+0x1a6/0x300 net/core/sock_map.c:947
 bpf_prog_8b502551ebbde0c1+0x42/0x4b
 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_run2+0x204/0x420 kernel/trace/bpf_trace.c:2420
 trace_hrtimer_start include/trace/events/timer.h:222 [inline]
 debug_activate kernel/time/hrtimer.c:479 [inline]
 enqueue_hrtimer+0x335/0x3a0 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+0x107/0x3a0 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:unwind_get_return_address+0x3f/0xc0 arch/x86/kernel/unwind_orc.c:369
Code: ff df e8 a4 62 54 00 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 72 8b 2b 31 ff 89 ee e8 c9 66 54 00 85 ed 74 4a 48 83 c3 48 <49> 89 df 49 c1 ef 03 43 80 3c 37 00 74 08 48 89 df e8 ab a6 b7 00
RSP: 0018:ffffc90003adf438 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffffc90003adf4a8 RCX: ffff88801e899e00
RDX: ffff88801e899e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81408de7 R09: ffffffff8140a8df
R10: 0000000000000003 R11: ffff88801e899e00 R12: ffff88801e899e00
R13: ffffffff8180dbc0 R14: dffffc0000000000 R15: ffffc90003adf460
 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:129
 __reset_page_owner+0x44/0x2d0 mm/page_owner.c:150
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
 release_pages+0x2744/0x2a80 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
 exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
 __mmput+0x115/0x3c0 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:569
 do_exit+0x99e/0x27e0 kernel/exit.c:865
 do_group_exit+0x207/0x2c0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f410f5eff09
Code: Unable to access opcode bytes at 0x7f410f5efedf.
RSP: 002b:00007fff28b1bb08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f410f5eff09
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f410f66b2b0 R08: ffffffffffffffb8 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f410f66b2b0
R13: 0000000000000000 R14: 00007f410f66bd00 R15: 00007f410f5c1160
 </TASK>
irq event stamp: 1168
hardirqs last  enabled at (1167): [<ffffffff82009291>] uncharge_batch+0x321/0x4f0 mm/memcontrol.c:7430
hardirqs last disabled at (1168): [<ffffffff8b6fdf0e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1043
softirqs last  enabled at (926): [<ffffffff81a4c4f1>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (926): [<ffffffff81a4c4f1>] bpf_link_settle+0x81/0x150 kernel/bpf/syscall.c:3181
softirqs last disabled at (924): [<ffffffff81a4c49a>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (924): [<ffffffff81a4c49a>] bpf_link_settle+0x2a/0x150 kernel/bpf/syscall.c:3179
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	e8 a4 62 54 00       	call   0x5462a9
   5:	48 89 d8             	mov    %rbx,%rax
   8:	48 c1 e8 03          	shr    $0x3,%rax
   c:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
  11:	84 c0                	test   %al,%al
  13:	75 72                	jne    0x87
  15:	8b 2b                	mov    (%rbx),%ebp
  17:	31 ff                	xor    %edi,%edi
  19:	89 ee                	mov    %ebp,%esi
  1b:	e8 c9 66 54 00       	call   0x5466e9
  20:	85 ed                	test   %ebp,%ebp
  22:	74 4a                	je     0x6e
  24:	48 83 c3 48          	add    $0x48,%rbx
* 28:	49 89 df             	mov    %rbx,%r15 <-- trapping instruction
  2b:	49 c1 ef 03          	shr    $0x3,%r15
  2f:	43 80 3c 37 00       	cmpb   $0x0,(%r15,%r14,1)
  34:	74 08                	je     0x3e
  36:	48 89 df             	mov    %rbx,%rdi
  39:	e8 ab a6 b7 00       	call   0xb7a6e9

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/27 00:48 net-next 237bb5f7f7f5 454571b6 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in __hrtimer_run_queues
2024/03/25 00:53 bpf-next 61df575632d6 0ea90952 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce possible deadlock in __hrtimer_run_queues
2024/04/15 06:38 upstream fe46a7dd189e c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in __hrtimer_run_queues
2024/04/14 13:02 upstream fe46a7dd189e c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in __hrtimer_run_queues
2024/04/11 14:38 upstream fe46a7dd189e 478efa7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in __hrtimer_run_queues
2024/04/09 19:57 upstream fe46a7dd189e 56086b24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in __hrtimer_run_queues
2024/04/07 14:57 upstream fe46a7dd189e ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in __hrtimer_run_queues
2024/03/20 20:55 upstream fe46a7dd189e 5b7d42ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in __hrtimer_run_queues
2024/03/30 05:19 upstream 4535e1a4174c 6baf5069 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in __hrtimer_run_queues
2024/03/27 07:26 upstream 7033999ecd7b 454571b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in __hrtimer_run_queues
2024/04/03 09:05 upstream b1e6ec0a0fd0 7925100d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in __hrtimer_run_queues
2024/03/30 08:33 upstream 4535e1a4174c 6baf5069 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in __hrtimer_run_queues
2024/03/27 07:28 upstream 7033999ecd7b 454571b6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in __hrtimer_run_queues
2024/03/25 11:11 upstream 4cece7649650 0ea90952 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in __hrtimer_run_queues
* Struck through repros no longer work on HEAD.