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possible deadlock in send_sigurg (2)

Status: fixed on 2021/03/10 01:48
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+c5e32344981ad9f33750@syzkaller.appspotmail.com
Fix commit: 8d1ddb5e7937 fcntl: Fix potential deadlock in send_sig{io, urg}()
First crash: 1453d, last: 1398d
Cause bisection: introduced by (bisect log) :
commit e918188611f073063415f40fae568fa4d86d9044
Author: Boqun Feng <boqun.feng@gmail.com>
Date: Fri Aug 7 07:42:20 2020 +0000

  locking: More accurate annotations for read_lock()

Crash: possible deadlock in send_sigurg (log)
Repro: C syz .config
  
▶ ▼ Discussions (8)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 5.10 001/217] soc: aspeed-lpc-ctrl: Fail probe of lpc-ctrl if reserved memory is not aligned 80 (80) 2021/03/04 21:07
[PATCH 5.4 00/47] 5.4.87-rc1 review 58 (58) 2021/02/26 14:21
[PATCH 5.10 00/63] 5.10.5-rc1 review 75 (75) 2021/01/07 08:13
[PATCH 4.19 00/35] 4.19.165-rc1 review 44 (44) 2021/01/06 13:46
[PATCH 4.19 00/29] 4.19.165-rc2 review 36 (36) 2021/01/06 13:46
[PATCH AUTOSEL 5.4 001/130] soc: aspeed-lpc-ctrl: Fail probe of lpc-ctrl if reserved memory is not aligned 140 (140) 2021/01/06 07:33
[PATCH AUTOSEL 4.19 01/87] locks: Fix UBSAN undefined behaviour in flock64_to_posix_lock 87 (87) 2020/12/23 02:21
possible deadlock in send_sigurg (2) 2 (5) 2020/11/05 12:45
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in send_sigurg fs C done 65 1639d 1652d 15/28 fixed on 2020/05/10 10:42

Sample crash report:
netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
========================================================
WARNING: possible irq lock inversion dependency detected
5.10.0-rc7-syzkaller #0 Not tainted
--------------------------------------------------------
syz-executor842/8459 just changed the state of lock:
ffff8880240c0b38 (&f->f_owner.lock){.+..}-{2:2}, at: send_sigurg+0x1e/0xab0 fs/fcntl.c:824
but this lock was taken by another, HARDIRQ-safe lock in the past:
 (&dev->event_lock){-...}-{2:2}


and interrupts could create inverse lock ordering between them.


other info that might help us debug this:
Chain exists of:
  &dev->event_lock --> &new->fa_lock --> &f->f_owner.lock

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&f->f_owner.lock);
                               local_irq_disable();
                               lock(&dev->event_lock);
                               lock(&new->fa_lock);
  <Interrupt>
    lock(&dev->event_lock);

 *** DEADLOCK ***

1 lock held by syz-executor842/8459:
 #0: ffff88801b140ce0 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1581 [inline]
 #0: ffff88801b140ce0 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_wait_for_connect net/ipv4/af_inet.c:596 [inline]
 #0: ffff88801b140ce0 (sk_lock-AF_INET){+.+.}-{0:0}, at: __inet_stream_connect+0x596/0xe30 net/ipv4/af_inet.c:686

the shortest dependencies between 2nd lock and 1st lock:
   -> (&dev->event_lock){-...}-{2:2} {
      IN-HARDIRQ-W at:
                          lock_acquire kernel/locking/lockdep.c:5437 [inline]
                          lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
                          __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                          _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
                          input_event drivers/input/input.c:440 [inline]
                          input_event+0x7b/0xb0 drivers/input/input.c:433
                          input_report_key include/linux/input.h:417 [inline]
                          psmouse_report_standard_buttons+0x2c/0x80 drivers/input/mouse/psmouse-base.c:123
                          psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:141 [inline]
                          psmouse_process_byte+0x1e1/0x890 drivers/input/mouse/psmouse-base.c:232
                          psmouse_handle_byte+0x41/0x1b0 drivers/input/mouse/psmouse-base.c:274
                          psmouse_interrupt+0x304/0xf00 drivers/input/mouse/psmouse-base.c:426
                          serio_interrupt+0x88/0x150 drivers/input/serio/serio.c:1002
                          i8042_interrupt+0x27a/0x520 drivers/input/serio/i8042.c:602
                          __handle_irq_event_percpu+0x303/0x8f0 kernel/irq/handle.c:156
                          handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
                          handle_irq_event+0x102/0x290 kernel/irq/handle.c:213
                          handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:819
                          asm_call_irq_on_stack+0xf/0x20
                          __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline]
                          run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline]
                          handle_irq arch/x86/kernel/irq.c:230 [inline]
                          __common_interrupt arch/x86/kernel/irq.c:249 [inline]
                          common_interrupt+0x120/0x200 arch/x86/kernel/irq.c:239
                          asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:622
                          native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
                          arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
                          __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
                          _raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191
                          spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
                          i8042_command+0x12e/0x150 drivers/input/serio/i8042.c:352
                          i8042_aux_write+0xd7/0x120 drivers/input/serio/i8042.c:387
                          serio_write include/linux/serio.h:125 [inline]
                          ps2_do_sendbyte+0x2ca/0x710 drivers/input/serio/libps2.c:40
                          ps2_sendbyte+0x58/0x150 drivers/input/serio/libps2.c:92
                          cypress_ps2_sendbyte+0x2e/0x160 drivers/input/mouse/cypress_ps2.c:42
                          cypress_ps2_read_cmd_status drivers/input/mouse/cypress_ps2.c:116 [inline]
                          cypress_send_ext_cmd+0x1d0/0x8d0 drivers/input/mouse/cypress_ps2.c:189
                          cypress_detect+0x75/0x190 drivers/input/mouse/cypress_ps2.c:205
                          psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline]
                          psmouse_try_protocol+0x211/0x370 drivers/input/mouse/psmouse-base.c:1023
                          psmouse_extensions+0x557/0x930 drivers/input/mouse/psmouse-base.c:1146
                          psmouse_switch_protocol+0x52a/0x740 drivers/input/mouse/psmouse-base.c:1542
                          psmouse_connect+0x5e6/0xfc0 drivers/input/mouse/psmouse-base.c:1632
                          serio_connect_driver drivers/input/serio/serio.c:47 [inline]
                          serio_driver_probe+0x72/0xa0 drivers/input/serio/serio.c:778
                          really_probe+0x291/0xde0 drivers/base/dd.c:554
                          driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
                          device_driver_attach+0x228/0x290 drivers/base/dd.c:1013
                          __driver_attach+0x15b/0x2f0 drivers/base/dd.c:1090
                          bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:305
                          serio_attach_driver drivers/input/serio/serio.c:808 [inline]
                          serio_handle_event+0x5f6/0xa30 drivers/input/serio/serio.c:227
                          process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
                          worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
                          kthread+0x3b1/0x4a0 kernel/kthread.c:292
                          ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
      INITIAL USE at:
                         lock_acquire kernel/locking/lockdep.c:5437 [inline]
                         lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
                         __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                         _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
                         input_inject_event+0xa6/0x310 drivers/input/input.c:466
                         __led_set_brightness drivers/leds/led-core.c:48 [inline]
                         led_set_brightness_nopm drivers/leds/led-core.c:275 [inline]
                         led_set_brightness_nosleep+0xe6/0x1a0 drivers/leds/led-core.c:292
                         led_set_brightness+0x134/0x170 drivers/leds/led-core.c:267
                         led_trigger_event drivers/leds/led-triggers.c:387 [inline]
                         led_trigger_event+0x70/0xd0 drivers/leds/led-triggers.c:377
                         kbd_led_trigger_activate+0xfa/0x130 drivers/tty/vt/keyboard.c:1010
                         led_trigger_set+0x61e/0xbd0 drivers/leds/led-triggers.c:195
                         led_trigger_set_default drivers/leds/led-triggers.c:259 [inline]
                         led_trigger_set_default+0x1a6/0x230 drivers/leds/led-triggers.c:246
                         led_classdev_register_ext+0x5b1/0x7c0 drivers/leds/led-class.c:417
                         led_classdev_register include/linux/leds.h:190 [inline]
                         input_leds_connect+0x3fb/0x740 drivers/input/input-leds.c:139
                         input_attach_handler+0x180/0x1f0 drivers/input/input.c:1031
                         input_register_device.cold+0xf0/0x307 drivers/input/input.c:2229
                         atkbd_connect+0x736/0xa00 drivers/input/keyboard/atkbd.c:1293
                         serio_connect_driver drivers/input/serio/serio.c:47 [inline]
                         serio_driver_probe+0x72/0xa0 drivers/input/serio/serio.c:778
                         really_probe+0x291/0xde0 drivers/base/dd.c:554
                         driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
                         device_driver_attach+0x228/0x290 drivers/base/dd.c:1013
                         __driver_attach+0x15b/0x2f0 drivers/base/dd.c:1090
                         bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:305
                         serio_attach_driver drivers/input/serio/serio.c:808 [inline]
                         serio_handle_event+0x5f6/0xa30 drivers/input/serio/serio.c:227
                         process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
                         worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
                         kthread+0x3b1/0x4a0 kernel/kthread.c:292
                         ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
    }
    ... key      at: [<ffffffff8fa28e00>] __key.8+0x0/0x40
    ... acquired at:
   __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
   _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
   spin_lock include/linux/spinlock.h:354 [inline]
   evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
   evdev_pass_values drivers/input/evdev.c:253 [inline]
   evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145
   input_pass_values drivers/input/input.c:134 [inline]
   input_handle_event+0x324/0x1400 drivers/input/input.c:399
   input_inject_event+0x2f5/0x310 drivers/input/input.c:471
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa30 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> (&client->buffer_lock){....}-{2:2} {
     INITIAL USE at:
                       lock_acquire kernel/locking/lockdep.c:5437 [inline]
                       lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
                       __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                       _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
                       spin_lock include/linux/spinlock.h:354 [inline]
                       evdev_pass_values.part.0+0xf6/0x970 drivers/input/evdev.c:261
                       evdev_pass_values drivers/input/evdev.c:253 [inline]
                       evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306
                       input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
                       input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145
                       input_pass_values drivers/input/input.c:134 [inline]
                       input_handle_event+0x324/0x1400 drivers/input/input.c:399
                       input_inject_event+0x2f5/0x310 drivers/input/input.c:471
                       evdev_write+0x430/0x760 drivers/input/evdev.c:530
                       vfs_write+0x28e/0xa30 fs/read_write.c:603
                       ksys_write+0x1ee/0x250 fs/read_write.c:658
                       do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                       entry_SYSCALL_64_after_hwframe+0x44/0xa9
   }
   ... key      at: [<ffffffff8fa29300>] __key.4+0x0/0x40
   ... acquired at:
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
   kill_fasync_rcu fs/fcntl.c:1002 [inline]
   kill_fasync fs/fcntl.c:1023 [inline]
   kill_fasync+0x14b/0x460 fs/fcntl.c:1016
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
   evdev_pass_values drivers/input/evdev.c:253 [inline]
   evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145
   input_pass_values drivers/input/input.c:134 [inline]
   input_handle_event+0x324/0x1400 drivers/input/input.c:399
   input_inject_event+0x2f5/0x310 drivers/input/input.c:471
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa30 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

 -> (&new->fa_lock){....}-{2:2} {
    INITIAL READ USE at:
                          lock_acquire kernel/locking/lockdep.c:5437 [inline]
                          lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
                          __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                          _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
                          kill_fasync_rcu fs/fcntl.c:1002 [inline]
                          kill_fasync fs/fcntl.c:1023 [inline]
                          kill_fasync+0x14b/0x460 fs/fcntl.c:1016
                          __pass_event drivers/input/evdev.c:240 [inline]
                          evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
                          evdev_pass_values drivers/input/evdev.c:253 [inline]
                          evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306
                          input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
                          input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145
                          input_pass_values drivers/input/input.c:134 [inline]
                          input_handle_event+0x324/0x1400 drivers/input/input.c:399
                          input_inject_event+0x2f5/0x310 drivers/input/input.c:471
                          evdev_write+0x430/0x760 drivers/input/evdev.c:530
                          vfs_write+0x28e/0xa30 fs/read_write.c:603
                          ksys_write+0x1ee/0x250 fs/read_write.c:658
                          do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                          entry_SYSCALL_64_after_hwframe+0x44/0xa9
  }
  ... key      at: [<ffffffff8ef63840>] __key.0+0x0/0x40
  ... acquired at:
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
   send_sigio+0x24/0x350 fs/fcntl.c:786
   kill_fasync_rcu fs/fcntl.c:1009 [inline]
   kill_fasync fs/fcntl.c:1023 [inline]
   kill_fasync+0x205/0x460 fs/fcntl.c:1016
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
   evdev_pass_values drivers/input/evdev.c:253 [inline]
   evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306
   input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
   input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145
   input_pass_values drivers/input/input.c:134 [inline]
   input_handle_event+0x324/0x1400 drivers/input/input.c:399
   input_inject_event+0x2f5/0x310 drivers/input/input.c:471
   evdev_write+0x430/0x760 drivers/input/evdev.c:530
   vfs_write+0x28e/0xa30 fs/read_write.c:603
   ksys_write+0x1ee/0x250 fs/read_write.c:658
   do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

-> (&f->f_owner.lock){.+..}-{2:2} {
   HARDIRQ-ON-R at:
                    lock_acquire kernel/locking/lockdep.c:5437 [inline]
                    lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
                    __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                    _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
                    send_sigurg+0x1e/0xab0 fs/fcntl.c:824
                    sk_send_sigurg+0x76/0x300 net/core/sock.c:2925
                    tcp_check_urg.isra.0+0x1f4/0x710 net/ipv4/tcp_input.c:5491
                    tcp_urg net/ipv4/tcp_input.c:5532 [inline]
                    tcp_rcv_established+0x106c/0x1eb0 net/ipv4/tcp_input.c:5866
                    tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1671
                    sk_backlog_rcv include/net/sock.h:1010 [inline]
                    __release_sock+0x134/0x3a0 net/core/sock.c:2523
                    release_sock+0x54/0x1b0 net/core/sock.c:3053
                    sk_stream_wait_memory+0x5bd/0xe60 net/core/stream.c:145
                    tcp_sendmsg_locked+0x1034/0x2d20 net/ipv4/tcp.c:1404
                    tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1444
                    inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
                    sock_sendmsg_nosec net/socket.c:651 [inline]
                    sock_sendmsg+0xcf/0x120 net/socket.c:671
                    __sys_sendto+0x21c/0x320 net/socket.c:1992
                    __do_sys_sendto net/socket.c:2004 [inline]
                    __se_sys_sendto net/socket.c:2000 [inline]
                    __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000
                    do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                    entry_SYSCALL_64_after_hwframe+0x44/0xa9
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5437 [inline]
                        lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
                        send_sigio+0x24/0x350 fs/fcntl.c:786
                        kill_fasync_rcu fs/fcntl.c:1009 [inline]
                        kill_fasync fs/fcntl.c:1023 [inline]
                        kill_fasync+0x205/0x460 fs/fcntl.c:1016
                        __pass_event drivers/input/evdev.c:240 [inline]
                        evdev_pass_values.part.0+0x64e/0x970 drivers/input/evdev.c:278
                        evdev_pass_values drivers/input/evdev.c:253 [inline]
                        evdev_events+0x28b/0x3f0 drivers/input/evdev.c:306
                        input_to_handler+0x2a0/0x4c0 drivers/input/input.c:115
                        input_pass_values.part.0+0x284/0x700 drivers/input/input.c:145
                        input_pass_values drivers/input/input.c:134 [inline]
                        input_handle_event+0x324/0x1400 drivers/input/input.c:399
                        input_inject_event+0x2f5/0x310 drivers/input/input.c:471
                        evdev_write+0x430/0x760 drivers/input/evdev.c:530
                        vfs_write+0x28e/0xa30 fs/read_write.c:603
                        ksys_write+0x1ee/0x250 fs/read_write.c:658
                        do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
                        entry_SYSCALL_64_after_hwframe+0x44/0xa9
 }
 ... key      at: [<ffffffff8ef62a60>] __key.5+0x0/0x40
 ... acquired at:
   mark_usage kernel/locking/lockdep.c:4312 [inline]
   __lock_acquire+0x120a/0x5500 kernel/locking/lockdep.c:4786
   lock_acquire kernel/locking/lockdep.c:5437 [inline]
   lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
   send_sigurg+0x1e/0xab0 fs/fcntl.c:824
   sk_send_sigurg+0x76/0x300 net/core/sock.c:2925
   tcp_check_urg.isra.0+0x1f4/0x710 net/ipv4/tcp_input.c:5491
   tcp_urg net/ipv4/tcp_input.c:5532 [inline]
   tcp_rcv_established+0x106c/0x1eb0 net/ipv4/tcp_input.c:5866
   tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1671
   sk_backlog_rcv include/net/sock.h:1010 [inline]
   __release_sock+0x134/0x3a0 net/core/sock.c:2523
   release_sock+0x54/0x1b0 net/core/sock.c:3053
   sk_stream_wait_memory+0x5bd/0xe60 net/core/stream.c:145
   tcp_sendmsg_locked+0x1034/0x2d20 net/ipv4/tcp.c:1404
   tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1444
   inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
   sock_sendmsg_nosec net/socket.c:651 [inline]
   sock_sendmsg+0xcf/0x120 net/socket.c:671
   __sys_sendto+0x21c/0x320 net/socket.c:1992
   __do_sys_sendto net/socket.c:2004 [inline]
   __se_sys_sendto net/socket.c:2000 [inline]
   __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000
   do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xa9


stack backtrace:
CPU: 0 PID: 8459 Comm: syz-executor842 Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 print_irq_inversion_bug kernel/locking/lockdep.c:3740 [inline]
 check_usage_backwards kernel/locking/lockdep.c:3884 [inline]
 mark_lock_irq kernel/locking/lockdep.c:3974 [inline]
 mark_lock.cold+0x1a/0x73 kernel/locking/lockdep.c:4411
 mark_usage kernel/locking/lockdep.c:4312 [inline]
 __lock_acquire+0x120a/0x5500 kernel/locking/lockdep.c:4786
 lock_acquire kernel/locking/lockdep.c:5437 [inline]
 lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
 _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:223
 send_sigurg+0x1e/0xab0 fs/fcntl.c:824
 sk_send_sigurg+0x76/0x300 net/core/sock.c:2925
 tcp_check_urg.isra.0+0x1f4/0x710 net/ipv4/tcp_input.c:5491
 tcp_urg net/ipv4/tcp_input.c:5532 [inline]
 tcp_rcv_established+0x106c/0x1eb0 net/ipv4/tcp_input.c:5866
 tcp_v4_do_rcv+0x5d1/0x870 net/ipv4/tcp_ipv4.c:1671
 sk_backlog_rcv include/net/sock.h:1010 [inline]
 __release_sock+0x134/0x3a0 net/core/sock.c:2523
 release_sock+0x54/0x1b0 net/core/sock.c:3053
 sk_stream_wait_memory+0x5bd/0xe60 net/core/stream.c:145
 tcp_sendmsg_locked+0x1034/0x2d20 net/ipv4/tcp.c:1404
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1444
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:671
 __sys_sendto+0x21c/0x320 net/socket.c:1992
 __do_sys_sendto net/socket.c:2004 [inline]
 __se_sys_sendto net/socket.c:2000 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x447309
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 0b d2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd544afe08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000447309
RDX: ffffffffffffff58 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00007ffd544afe20 R08: 0000000020000100 R09: 0000000000000010
R10: 0000000020008005 R11: 0000000000000246 R12: 00007ffd544afe30
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Crashes (25):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/12/13 03:16 upstream 7b1b868e1d91 bca53db9 .config console log report syz C ci-upstream-kasan-gce
2020/11/04 09:57 upstream 4ef8451b3326 cba33199 .config console log report syz C ci-upstream-kasan-gce
2020/12/11 12:33 upstream 33dc9614dc20 ba24ffcd .config console log report info ci-upstream-kasan-gce-selinux-root
2020/12/08 17:58 upstream cd796ed33450 a7f7f4a4 .config console log report info ci-upstream-kasan-gce
2020/12/07 11:36 upstream 0477e9288185 1190297f .config console log report info ci-upstream-kasan-gce-selinux-root
2020/11/29 01:47 upstream 45e885c439e8 a0092f9d .config console log report info ci-upstream-kasan-gce-selinux-root
2020/11/28 11:22 upstream c84e1efae022 486f93ef .config console log report info ci-upstream-kasan-gce
2020/11/27 05:37 upstream 85a2c56cb445 5018c946 .config console log report info ci-upstream-kasan-gce-selinux-root
2020/11/25 08:47 upstream 127c501a03d5 1a1f4bd8 .config console log report info ci-upstream-kasan-gce-selinux-root
2020/11/12 21:22 upstream af5043c89a8e 77a55c8e .config console log report info ci-upstream-kasan-gce
2020/11/09 12:00 upstream f8394f232b1e 64069d48 .config console log report info ci-upstream-kasan-gce
2020/11/04 07:35 upstream 4ef8451b3326 cba33199 .config console log report info ci-upstream-kasan-gce
2020/11/03 01:00 upstream 495023e4e49e 8bc4594f .config console log report info ci-upstream-kasan-gce
2020/11/01 12:21 upstream c2dc4c073fb7 8bc4594f .config console log report info ci-upstream-kasan-gce-selinux-root
2020/10/31 21:16 upstream bb3540be73ca 8bc4594f .config console log report info ci-upstream-kasan-gce
2020/10/31 13:17 upstream 5fc6b075e165 8bc4594f .config console log report info ci-upstream-kasan-gce
2020/10/31 00:40 upstream 5fc6b075e165 18e33098 .config console log report info ci-upstream-kasan-gce
2020/10/25 02:28 upstream d76913908102 a1839e81 .config console log report info ci-upstream-kasan-gce-selinux-root
2020/10/19 08:57 upstream 7cf726a59435 ff4a3345 .config console log report info ci-upstream-kasan-gce
2020/12/09 20:05 upstream a68a0262abda c090b4da .config console log report info ci-upstream-kasan-gce-386
2020/12/08 16:25 upstream cd796ed33450 a7f7f4a4 .config console log report info ci-upstream-kasan-gce-386
2020/11/23 10:28 upstream 418baf2c28f3 0d27f508 .config console log report info ci-upstream-kasan-gce-386
2020/11/17 02:04 upstream 9c87c9f41245 1bf9a662 .config console log report info ci-upstream-kasan-gce-386
2020/11/13 19:14 upstream 585e5b17b92d e1140d25 .config console log report info ci-upstream-kasan-gce-386
2020/11/12 21:07 upstream af5043c89a8e 77a55c8e .config console log report info ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.