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Message-ID: <ZrmagEKn_vJ15-52@google.com>
Date: Sun, 11 Aug 2024 22:15:44 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: syzbot <syzbot+e8b864815e5e34554211@...kaller.appspotmail.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com, Boqun Feng <boqun.feng@...il.com>,
Jeff Layton <jlayton@...nel.org>,
Desmond Cheong Zhi Xi <desmondcheongzx@...il.com>
Subject: Re: [syzbot] [input?] possible deadlock in psmouse_handle_byte
On Fri, Aug 09, 2024 at 05:03:17AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: de9c2c66ad8e Linux 6.11-rc2
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=105ac8f3980000
> kernel config: https://syzkaller.appspot.com/x/.config?x=505ed4a1dd93463a
> dashboard link: https://syzkaller.appspot.com/bug?extid=e8b864815e5e34554211
> compiler: gcc (Debian 12.2.0-14) 12.2.0, 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/dc943231c101/disk-de9c2c66.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/c48115bc34cd/vmlinux-de9c2c66.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/f08b2b00add3/bzImage-de9c2c66.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+e8b864815e5e34554211@...kaller.appspotmail.com
Looks like similar issue with between input_dev->event_lock and
f->f_owner.lock was supposed to be handled by:
8d1ddb5e7937 ("fcntl: Fix potential deadlock in send_sig{io, urg}()")
2f488f698fda ("fcntl: fix potential deadlock for &fasync_struct.fa_lock")
It seems that we keep adding "irqsave" to more and more locks. Is there
a better way?
CCing patch authors....
>
> =====================================================
> WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
> 6.11.0-rc2-syzkaller #0 Not tainted
> -----------------------------------------------------
> syz.2.1316/10260 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
>
> and this task is already holding:
> which would create a new lock dependency:
>
> but this new dependency connects a HARDIRQ-irq-safe lock:
> (&dev->event_lock#2){-.-.}-{2:2}
>
> ... which became HARDIRQ-irq-safe at:
> psmouse_handle_byte+0x44/0x570 drivers/input/mouse/psmouse-base.c:279
> psmouse_receive_byte+0x243/0xe20 drivers/input/mouse/psmouse-base.c:426
> ps2_interrupt+0x20b/0x5b0 drivers/input/serio/libps2.c:613
> serio_interrupt+0x8f/0x150 drivers/input/serio/serio.c:998
> i8042_interrupt+0x3f5/0x8a0 drivers/input/serio/i8042.c:606
> __handle_irq_event_percpu+0x229/0x7c0 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_edge_irq+0x263/0xd10 kernel/irq/chip.c:831
> generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
> handle_irq arch/x86/kernel/irq.c:247 [inline]
> call_irq_handler arch/x86/kernel/irq.c:259 [inline]
> __common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:285
> common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:278
> 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
> spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
> i8042_command drivers/input/serio/i8042.c:356 [inline]
> i8042_aux_write+0x11a/0x180 drivers/input/serio/i8042.c:391
> serio_write include/linux/serio.h:125 [inline]
> ps2_do_sendbyte+0x264/0x6f0 drivers/input/serio/libps2.c:58
> ps2_sendbyte+0x59/0x150 drivers/input/serio/libps2.c:113
> cypress_ps2_sendbyte+0x2c/0xf0 drivers/input/mouse/cypress_ps2.c:43
> cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:111 [inline]
> cypress_send_ext_cmd+0x1dc/0xa30 drivers/input/mouse/cypress_ps2.c:182
> cypress_detect+0x8c/0x1a0 drivers/input/mouse/cypress_ps2.c:195
> psmouse_do_detect drivers/input/mouse/psmouse-base.c:1006 [inline]
> psmouse_try_protocol+0x21b/0x380 drivers/input/mouse/psmouse-base.c:1020
> psmouse_extensions+0x61a/0x960 drivers/input/mouse/psmouse-base.c:1143
> psmouse_switch_protocol+0x538/0x750 drivers/input/mouse/psmouse-base.c:1537
> psmouse_connect+0x5cc/0xf80 drivers/input/mouse/psmouse-base.c:1626
> serio_connect_driver drivers/input/serio/serio.c:44 [inline]
> serio_driver_probe+0x74/0xa0 drivers/input/serio/serio.c:775
> call_driver_probe drivers/base/dd.c:578 [inline]
> really_probe+0x23e/0xa90 drivers/base/dd.c:657
> __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
> driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
> __driver_attach+0x283/0x580 drivers/base/dd.c:1215
> bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368
> serio_attach_driver drivers/input/serio/serio.c:804 [inline]
> serio_handle_event+0x2bb/0xa90 drivers/input/serio/serio.c:224
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
>
> to a HARDIRQ-irq-unsafe lock:
> (tasklist_lock){.+.+}-{2:2}
>
> ... which became HARDIRQ-irq-unsafe at:
> ...
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
> _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228
> __do_wait+0x105/0x890 kernel/exit.c:1591
> do_wait+0x219/0x570 kernel/exit.c:1635
> kernel_wait+0xa0/0x160 kernel/exit.c:1811
> call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
> call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
>
> other info that might help us debug this:
>
> Chain exists of:
> &dev->event_lock#2 --> &f->f_owner.lock --> tasklist_lock
>
> Possible interrupt unsafe locking scenario:
>
> CPU0 CPU1
> ---- ----
> lock(tasklist_lock);
> local_irq_disable();
> lock(&dev->event_lock#2);
> lock(&f->f_owner.lock);
> <Interrupt>
> lock(&dev->event_lock#2);
>
> *** DEADLOCK ***
>
> 6 locks held by syz.2.1316/10260:
> #0: ffff88807ac80420 (sb_writers#6){.+.+}-{0:0}, at: vfs_truncate+0xea/0x4e0 fs/open.c:84
> #1: ffffffff8dfcf7b0 (file_rwsem){++++}-{0:0}, at: break_lease include/linux/filelock.h:431 [inline]
> #1: ffffffff8dfcf7b0 (file_rwsem){++++}-{0:0}, at: break_lease include/linux/filelock.h:421 [inline]
> #1: ffffffff8dfcf7b0 (file_rwsem){++++}-{0:0}, at: vfs_truncate+0x32e/0x4e0 fs/open.c:105
> #2: ffff88807c2cd018 (&ctx->flc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
> #2: ffff88807c2cd018 (&ctx->flc_lock){+.+.}-{2:2}, at: __break_lease+0x49b/0x17d0 fs/locks.c:1564
> #3: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
> #3: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
> #3: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: kill_fasync fs/fcntl.c:1048 [inline]
> #3: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x6d/0x4f0 fs/fcntl.c:1042
> #4: ffff888023e29210 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1028 [inline]
> #4: ffff888023e29210 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1049 [inline]
> #4: ffff888023e29210 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x4f0 fs/fcntl.c:1042
> #5: ffff88805dc6d518 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x28/0x3c0 fs/fcntl.c:816
>
> the dependencies between HARDIRQ-irq-safe lock and the holding lock:
> -> (&dev->event_lock#2){-.-.}-{2:2} {
> IN-HARDIRQ-W at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
> _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
> input_event drivers/input/input.c:397 [inline]
> input_event+0x70/0xa0 drivers/input/input.c:390
> input_report_key include/linux/input.h:426 [inline]
> psmouse_report_standard_buttons+0x30/0x80 drivers/input/mouse/psmouse-base.c:128
> psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:146 [inline]
> psmouse_process_byte+0x39c/0x8a0 drivers/input/mouse/psmouse-base.c:237
> psmouse_handle_byte+0x44/0x570 drivers/input/mouse/psmouse-base.c:279
> psmouse_receive_byte+0x243/0xe20 drivers/input/mouse/psmouse-base.c:426
> ps2_interrupt+0x20b/0x5b0 drivers/input/serio/libps2.c:613
> serio_interrupt+0x8f/0x150 drivers/input/serio/serio.c:998
> i8042_interrupt+0x3f5/0x8a0 drivers/input/serio/i8042.c:606
> __handle_irq_event_percpu+0x229/0x7c0 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_edge_irq+0x263/0xd10 kernel/irq/chip.c:831
> generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
> handle_irq arch/x86/kernel/irq.c:247 [inline]
> call_irq_handler arch/x86/kernel/irq.c:259 [inline]
> __common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:285
> common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:278
> 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
> spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
> i8042_command drivers/input/serio/i8042.c:356 [inline]
> i8042_aux_write+0x11a/0x180 drivers/input/serio/i8042.c:391
> serio_write include/linux/serio.h:125 [inline]
> ps2_do_sendbyte+0x264/0x6f0 drivers/input/serio/libps2.c:58
> ps2_sendbyte+0x59/0x150 drivers/input/serio/libps2.c:113
> cypress_ps2_sendbyte+0x2c/0xf0 drivers/input/mouse/cypress_ps2.c:43
> cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:111 [inline]
> cypress_send_ext_cmd+0x1dc/0xa30 drivers/input/mouse/cypress_ps2.c:182
> cypress_detect+0x8c/0x1a0 drivers/input/mouse/cypress_ps2.c:195
> psmouse_do_detect drivers/input/mouse/psmouse-base.c:1006 [inline]
> psmouse_try_protocol+0x21b/0x380 drivers/input/mouse/psmouse-base.c:1020
> psmouse_extensions+0x61a/0x960 drivers/input/mouse/psmouse-base.c:1143
> psmouse_switch_protocol+0x538/0x750 drivers/input/mouse/psmouse-base.c:1537
> psmouse_connect+0x5cc/0xf80 drivers/input/mouse/psmouse-base.c:1626
> serio_connect_driver drivers/input/serio/serio.c:44 [inline]
> serio_driver_probe+0x74/0xa0 drivers/input/serio/serio.c:775
> call_driver_probe drivers/base/dd.c:578 [inline]
> really_probe+0x23e/0xa90 drivers/base/dd.c:657
> __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
> driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
> __driver_attach+0x283/0x580 drivers/base/dd.c:1215
> bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368
> serio_attach_driver drivers/input/serio/serio.c:804 [inline]
> serio_handle_event+0x2bb/0xa90 drivers/input/serio/serio.c:224
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
> IN-SOFTIRQ-W at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
> _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
> input_inject_event+0xa4/0x370 drivers/input/input.c:423
> __led_set_brightness drivers/leds/led-core.c:52 [inline]
> led_set_brightness_nopm drivers/leds/led-core.c:323 [inline]
> led_set_brightness_nosleep drivers/leds/led-core.c:354 [inline]
> led_set_brightness+0x211/0x290 drivers/leds/led-core.c:316
> led_trigger_event drivers/leds/led-triggers.c:407 [inline]
> led_trigger_event+0xda/0x270 drivers/leds/led-triggers.c:395
> kbd_propagate_led_state drivers/tty/vt/keyboard.c:1080 [inline]
> kbd_bh+0x21b/0x300 drivers/tty/vt/keyboard.c:1269
> tasklet_action_common.constprop.0+0x24c/0x3e0 kernel/softirq.c:785
> handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
> __do_softirq kernel/softirq.c:588 [inline]
> invoke_softirq kernel/softirq.c:428 [inline]
> __irq_exit_rcu kernel/softirq.c:637 [inline]
> irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
> instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
> sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
> lock_acquire+0xef/0x560 kernel/locking/lockdep.c:5732
> rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
> rcu_read_lock_sched include/linux/rcupdate.h:930 [inline]
> pfn_valid include/linux/mmzone.h:2024 [inline]
> page_table_check_clear mm/page_table_check.c:70 [inline]
> __page_table_check_pte_clear+0x1c0/0x580 mm/page_table_check.c:169
> page_table_check_pte_clear include/linux/page_table_check.h:49 [inline]
> ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1284 [inline]
> get_and_clear_full_ptes include/linux/pgtable.h:678 [inline]
> zap_present_folio_ptes mm/memory.c:1493 [inline]
> zap_present_ptes mm/memory.c:1576 [inline]
> zap_pte_range mm/memory.c:1618 [inline]
> zap_pmd_range mm/memory.c:1736 [inline]
> zap_pud_range mm/memory.c:1765 [inline]
> zap_p4d_range mm/memory.c:1786 [inline]
> unmap_page_range+0x21ac/0x3c10 mm/memory.c:1807
> unmap_single_vma+0x194/0x2b0 mm/memory.c:1853
> unmap_vmas+0x22f/0x490 mm/memory.c:1897
> exit_mmap+0x1b8/0xb20 mm/mmap.c:3412
> __mmput+0x12a/0x480 kernel/fork.c:1345
> mmput+0x62/0x70 kernel/fork.c:1367
> exit_mm kernel/exit.c:571 [inline]
> do_exit+0x9bf/0x2bb0 kernel/exit.c:869
> do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
> get_signal+0x25fd/0x2770 kernel/signal.c:2917
> arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
> exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
> exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
> __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
> syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
> do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> INITIAL USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
> _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
> input_inject_event+0xa4/0x370 drivers/input/input.c:423
> __led_set_brightness drivers/leds/led-core.c:52 [inline]
> led_set_brightness_nopm drivers/leds/led-core.c:323 [inline]
> led_set_brightness_nosleep drivers/leds/led-core.c:354 [inline]
> led_set_brightness+0x211/0x290 drivers/leds/led-core.c:316
> kbd_led_trigger_activate+0xcb/0x110 drivers/tty/vt/keyboard.c:1036
> led_trigger_set+0x59a/0xc60 drivers/leds/led-triggers.c:212
> led_match_default_trigger drivers/leds/led-triggers.c:269 [inline]
> led_match_default_trigger drivers/leds/led-triggers.c:263 [inline]
> led_trigger_set_default drivers/leds/led-triggers.c:287 [inline]
> led_trigger_set_default+0x1bd/0x2a0 drivers/leds/led-triggers.c:276
> led_classdev_register_ext+0x78c/0x9e0 drivers/leds/led-class.c:555
> led_classdev_register include/linux/leds.h:273 [inline]
> input_leds_connect+0x54a/0x8e0 drivers/input/input-leds.c:145
> input_attach_handler.isra.0+0x181/0x260 drivers/input/input.c:1027
> input_register_device+0xa8e/0x1140 drivers/input/input.c:2473
> atkbd_connect+0x5e2/0xa20 drivers/input/keyboard/atkbd.c:1342
> serio_connect_driver drivers/input/serio/serio.c:44 [inline]
> serio_driver_probe+0x74/0xa0 drivers/input/serio/serio.c:775
> call_driver_probe drivers/base/dd.c:578 [inline]
> really_probe+0x23e/0xa90 drivers/base/dd.c:657
> __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
> driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
> __driver_attach+0x283/0x580 drivers/base/dd.c:1215
> bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368
> serio_attach_driver drivers/input/serio/serio.c:804 [inline]
> serio_handle_event+0x2bb/0xa90 drivers/input/serio/serio.c:224
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
> }
> ... key at: [<ffffffff951ecaa0>] __key.7+0x0/0x40
> -> (&new->fa_lock){....}-{2:2} {
> INITIAL USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
> _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326
> fasync_remove_entry+0xb9/0x1f0 fs/fcntl.c:905
> fasync_helper+0xaf/0xd0 fs/fcntl.c:1008
> sock_fasync+0x98/0x140 net/socket.c:1446
> __fput+0x94a/0xbb0 fs/file_table.c:419
> task_work_run+0x14e/0x250 kernel/task_work.c:228
> resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
> exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
> exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
> __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
> syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
> do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> INITIAL READ USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
> _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236
> kill_fasync_rcu fs/fcntl.c:1028 [inline]
> kill_fasync fs/fcntl.c:1049 [inline]
> kill_fasync+0x138/0x4f0 fs/fcntl.c:1042
> sock_wake_async+0x132/0x160 net/socket.c:1475
> sk_wake_async include/net/sock.h:2440 [inline]
> sk_wake_async include/net/sock.h:2436 [inline]
> unix_release_sock+0xb1d/0x1280 net/unix/af_unix.c:713
> unix_release+0x91/0xf0 net/unix/af_unix.c:1112
> __sock_release+0xb0/0x270 net/socket.c:659
> sock_close+0x1c/0x30 net/socket.c:1421
> __fput+0x408/0xbb0 fs/file_table.c:422
> task_work_run+0x14e/0x250 kernel/task_work.c:228
> get_signal+0x1ca/0x2770 kernel/signal.c:2689
> arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
> exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
> exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
> __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
> syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
> do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> }
> ... key at: [<ffffffff94f37c00>] __key.0+0x0/0x40
> ... acquired at:
> __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
> _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236
> kill_fasync_rcu fs/fcntl.c:1028 [inline]
> kill_fasync fs/fcntl.c:1049 [inline]
> kill_fasync+0x138/0x4f0 fs/fcntl.c:1042
> mousedev_notify_readers+0x6d9/0xa30 drivers/input/mousedev.c:309
> mousedev_event+0x84e/0x1490 drivers/input/mousedev.c:394
> input_handler_events_default+0x116/0x1b0 drivers/input/input.c:2552
> input_pass_values+0x777/0x8e0 drivers/input/input.c:126
> input_event_dispose drivers/input/input.c:341 [inline]
> input_handle_event+0xf0b/0x14d0 drivers/input/input.c:369
> input_inject_event+0x1bb/0x370 drivers/input/input.c:428
> evdev_write+0x450/0x750 drivers/input/evdev.c:521
> vfs_write+0x29a/0x1140 fs/read_write.c:588
> ksys_write+0x1f8/0x260 fs/read_write.c:643
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> -> (&f->f_owner.lock){....}-{2:2} {
> INITIAL USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
> _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326
> f_modown+0x2a/0x380 fs/fcntl.c:93
> __f_setown fs/fcntl.c:112 [inline]
> f_setown+0xd4/0x2a0 fs/fcntl.c:140
> do_fcntl+0x11f7/0x1380 fs/fcntl.c:412
> __do_sys_fcntl fs/fcntl.c:492 [inline]
> __se_sys_fcntl fs/fcntl.c:477 [inline]
> __x64_sys_fcntl+0x174/0x200 fs/fcntl.c:477
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> INITIAL READ USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
> _raw_read_lock_irq+0x67/0x80 kernel/locking/spinlock.c:244
> f_getown_ex fs/fcntl.c:214 [inline]
> do_fcntl+0x787/0x1380 fs/fcntl.c:415
> __do_sys_fcntl fs/fcntl.c:492 [inline]
> __se_sys_fcntl fs/fcntl.c:477 [inline]
> __x64_sys_fcntl+0x174/0x200 fs/fcntl.c:477
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> }
> ... key at: [<ffffffff94f36ea0>] __key.2+0x0/0x40
> ... acquired at:
> __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
> _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236
> send_sigio+0x28/0x3c0 fs/fcntl.c:816
> kill_fasync_rcu fs/fcntl.c:1035 [inline]
> kill_fasync fs/fcntl.c:1049 [inline]
> kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1042
> sock_wake_async+0x132/0x160 net/socket.c:1475
> sk_wake_async include/net/sock.h:2440 [inline]
> sk_wake_async include/net/sock.h:2436 [inline]
> unix_release_sock+0xb1d/0x1280 net/unix/af_unix.c:713
> unix_release+0x91/0xf0 net/unix/af_unix.c:1112
> __sock_release+0xb0/0x270 net/socket.c:659
> sock_close+0x1c/0x30 net/socket.c:1421
> __fput+0x408/0xbb0 fs/file_table.c:422
> task_work_run+0x14e/0x250 kernel/task_work.c:228
> get_signal+0x1ca/0x2770 kernel/signal.c:2689
> arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
> exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
> exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
> __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
> syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
> do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
>
> the dependencies between the lock to be acquired
> and HARDIRQ-irq-unsafe lock:
> -> (tasklist_lock){.+.+}-{2:2} {
> HARDIRQ-ON-R at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
> _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228
> __do_wait+0x105/0x890 kernel/exit.c:1591
> do_wait+0x219/0x570 kernel/exit.c:1635
> kernel_wait+0xa0/0x160 kernel/exit.c:1811
> call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
> call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
> SOFTIRQ-ON-R at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
> _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228
> __do_wait+0x105/0x890 kernel/exit.c:1591
> do_wait+0x219/0x570 kernel/exit.c:1635
> kernel_wait+0xa0/0x160 kernel/exit.c:1811
> call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
> call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
> INITIAL USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline]
> _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326
> copy_process+0x4420/0x8de0 kernel/fork.c:2500
> kernel_clone+0xfd/0x980 kernel/fork.c:2781
> user_mode_thread+0xb4/0xf0 kernel/fork.c:2859
> rest_init+0x23/0x2b0 init/main.c:712
> start_kernel+0x3df/0x4c0 init/main.c:1103
> x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
> x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
> common_startup_64+0x13e/0x148
> INITIAL READ USE at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
> _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228
> __do_wait+0x105/0x890 kernel/exit.c:1591
> do_wait+0x219/0x570 kernel/exit.c:1635
> kernel_wait+0xa0/0x160 kernel/exit.c:1811
> call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
> call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
> process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
> process_scheduled_works kernel/workqueue.c:3312 [inline]
> worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
> kthread+0x2c1/0x3a0 kernel/kthread.c:389
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
> }
> ... key at: [<ffffffff8da0a098>] tasklist_lock+0x18/0x40
> ... acquired at:
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
> _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228
> send_sigio+0xb4/0x3c0 fs/fcntl.c:830
> kill_fasync_rcu fs/fcntl.c:1035 [inline]
> kill_fasync fs/fcntl.c:1049 [inline]
> kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1042
> lease_break_callback+0x23/0x30 fs/locks.c:558
> __break_lease+0x67c/0x17d0 fs/locks.c:1592
> break_lease include/linux/filelock.h:431 [inline]
> break_lease include/linux/filelock.h:421 [inline]
> vfs_truncate+0x32e/0x4e0 fs/open.c:105
> do_sys_truncate fs/open.c:134 [inline]
> __do_sys_truncate fs/open.c:146 [inline]
> __se_sys_truncate fs/open.c:144 [inline]
> __x64_sys_truncate+0x174/0x1e0 fs/open.c:144
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
>
> stack backtrace:
> CPU: 0 UID: 0 PID: 10260 Comm: syz.2.1316 Not tainted 6.11.0-rc2-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
> Call Trace:
> <TASK>
> __dump_stack lib/dump_stack.c:93 [inline]
> dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
> print_bad_irq_dependency kernel/locking/lockdep.c:2625 [inline]
> check_irq_usage+0xe3c/0x1490 kernel/locking/lockdep.c:2864
> check_prev_add kernel/locking/lockdep.c:3137 [inline]
> check_prevs_add kernel/locking/lockdep.c:3252 [inline]
> validate_chain kernel/locking/lockdep.c:3868 [inline]
> __lock_acquire+0x2503/0x3cb0 kernel/locking/lockdep.c:5142
> lock_acquire kernel/locking/lockdep.c:5759 [inline]
> lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
> __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline]
> _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228
> send_sigio+0xb4/0x3c0 fs/fcntl.c:830
> kill_fasync_rcu fs/fcntl.c:1035 [inline]
> kill_fasync fs/fcntl.c:1049 [inline]
> kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1042
> lease_break_callback+0x23/0x30 fs/locks.c:558
> __break_lease+0x67c/0x17d0 fs/locks.c:1592
> break_lease include/linux/filelock.h:431 [inline]
> break_lease include/linux/filelock.h:421 [inline]
> vfs_truncate+0x32e/0x4e0 fs/open.c:105
> do_sys_truncate fs/open.c:134 [inline]
> __do_sys_truncate fs/open.c:146 [inline]
> __se_sys_truncate fs/open.c:144 [inline]
> __x64_sys_truncate+0x174/0x1e0 fs/open.c:144
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7fab6db779f9
> Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007fab6e94d048 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
> RAX: ffffffffffffffda RBX: 00007fab6dd05f80 RCX: 00007fab6db779f9
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
> RBP: 00007fab6dbe58ee R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 000000000000000b R14: 00007fab6dd05f80 R15: 00007fff86339048
> </TASK>
>
>
> ---
> 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 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
--
Dmitry
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