BUG: scheduling while atomic: syz-executor.4/5902/0x00000002
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 5902 Comm: syz-executor.4 Not tainted 5.4.125-syzkaller-00030-g1e429b8f9eb9 #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+0x1d8/0x24e lib/dump_stack.c:118
 __schedule_bug+0x1af/0x240 kernel/sched/core.c:4076
 schedule_debug kernel/sched/core.c:4100 [inline]
 __schedule+0xa42/0x1170 kernel/sched/core.c:4219
 schedule+0x13b/0x1d0 kernel/sched/core.c:4355
 __lock_sock net/core/sock.c:2414 [inline]
 lock_sock_nested+0x1ed/0x310 net/core/sock.c:2960
 lock_sock include/net/sock.h:1549 [inline]
 hci_sock_dev_event+0x2da/0x570 net/bluetooth/hci_sock.c:758
 hci_unregister_dev+0x2a5/0x13f0 net/bluetooth/hci_core.c:3424
 hci_uart_tty_close+0x1a2/0x220 drivers/bluetooth/hci_ldisc.c:545
 tty_ldisc_close drivers/tty/tty_ldisc.c:494 [inline]
 tty_ldisc_kill drivers/tty/tty_ldisc.c:642 [inline]
 tty_ldisc_release+0x272/0x600 drivers/tty/tty_ldisc.c:814
 tty_release_struct+0x27/0xd0 drivers/tty/tty_io.c:1612
 tty_release+0xdd7/0x10a0 drivers/tty/tty_io.c:1785
 __fput+0x27d/0x6c0 fs/file_table.c:281
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fdb472bf51b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007fffdc55cec0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fdb472bf51b
RDX: 00007fdb47415898 RSI: ffffffff81005ccd RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b3232151c
R10: 0000000000001bc1 R11: 0000000000000293 R12: 000000000029b3b0
R13: 00000000000003e8 R14: 00007fdb47410f60 R15: 000000000029b3ad
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(val > preempt_count())
WARNING: CPU: 0 PID: 5902 at kernel/sched/core.c:4019 preempt_count_sub+0x9c/0x160 kernel/sched/core.c:4019
Modules linked in:
CPU: 0 PID: 5902 Comm: syz-executor.4 Tainted: G        W         5.4.125-syzkaller-00030-g1e429b8f9eb9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count_sub+0x9c/0x160 kernel/sched/core.c:4019
Code: 42 8a 04 30 84 c0 0f 85 89 00 00 00 83 3d 9f b0 00 05 00 75 d3 48 c7 c7 80 cb aa 84 48 c7 c6 20 cc aa 84 31 c0 e8 54 33 f6 ff <0f> 0b eb ba e8 7b 09 df 00 85 c0 74 b1 48 c7 c0 94 47 47 86 48 c1
RSP: 0018:ffff8881abfefc48 EFLAGS: 00010246
RAX: edf0d246e727bc00 RBX: 0000000000000001 RCX: ffff8881a3a7cec0
RDX: 0000000000000000 RSI: 0000000000002f77 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff814e8e1f R09: fffffbfff0dcd2da
R10: fffffbfff0dcd2da R11: 0000000000000000 R12: ffff8881ac6c3c00
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888185478000
FS:  0000555556c8d400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555565e23bc CR3: 00000001dc6aa000 CR4: 00000000003426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __raw_read_unlock include/linux/rwlock_api_smp.h:227 [inline]
 _raw_read_unlock+0x21/0x40 kernel/locking/spinlock.c:255
 hci_unregister_dev+0x2a5/0x13f0 net/bluetooth/hci_core.c:3424
 hci_uart_tty_close+0x1a2/0x220 drivers/bluetooth/hci_ldisc.c:545
 tty_ldisc_close drivers/tty/tty_ldisc.c:494 [inline]
 tty_ldisc_kill drivers/tty/tty_ldisc.c:642 [inline]
 tty_ldisc_release+0x272/0x600 drivers/tty/tty_ldisc.c:814
 tty_release_struct+0x27/0xd0 drivers/tty/tty_io.c:1612
 tty_release+0xdd7/0x10a0 drivers/tty/tty_io.c:1785
 __fput+0x27d/0x6c0 fs/file_table.c:281
 task_work_run+0x186/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fdb472bf51b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007fffdc55cec0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fdb472bf51b
RDX: 00007fdb47415898 RSI: ffffffff81005ccd RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b3232151c
R10: 0000000000001bc1 R11: 0000000000000293 R12: 000000000029b3b0
R13: 00000000000003e8 R14: 00007fdb47410f60 R15: 000000000029b3ad
---[ end trace 8ac91f9b05f5a149 ]---