BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2581
in_atomic(): 1, irqs_disabled(): 1, pid: 706, name: syz-executor.1
3 locks held by syz-executor.1/706:
#0: 000000001b520386 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
#1: 000000009bca4d5b (&(&tty->flow_lock)->rlock){....}, at: spin_lock_irq include/linux/spinlock.h:354 [inline]
#1: 000000009bca4d5b (&(&tty->flow_lock)->rlock){....}, at: n_tty_ioctl_helper+0xcc/0x3a0 drivers/tty/tty_ioctl.c:914
#2: 000000001b520386 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref+0x1d/0x80 drivers/tty/tty_ldisc.c:293
irq event stamp: 330
hardirqs last enabled at (329): [<ffffffff81007641>] do_syscall_64+0x21/0x620 arch/x86/entry/common.c:280
hardirqs last disabled at (330): [<ffffffff8816a795>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (330): [<ffffffff8816a795>] _raw_spin_lock_irq+0x35/0x80 kernel/locking/spinlock.c:160
softirqs last enabled at (270): [<ffffffff86748b15>] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline]
softirqs last enabled at (270): [<ffffffff86748b15>] __dev_queue_xmit+0x15f5/0x2e00 net/core/dev.c:3865
softirqs last disabled at (266): [<ffffffff86747702>] __dev_queue_xmit+0x1e2/0x2e00 net/core/dev.c:3773
Preemption disabled at:
[<0000000000000000>] (null)
CPU: 1 PID: 706 Comm: syz-executor.1 Not tainted 4.19.181-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+0x1fc/0x2ef lib/dump_stack.c:118
___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6192
do_con_write+0x116/0x1d90 drivers/tty/vt/vt.c:2581
con_write+0x22/0xb0 drivers/tty/vt/vt.c:3145
n_hdlc_send_frames+0x278/0x470 drivers/tty/n_hdlc.c:403
n_hdlc_tty_wakeup+0xa0/0xc0 drivers/tty/n_hdlc.c:479
tty_wakeup+0xd4/0x110 drivers/tty/tty_io.c:534
__start_tty drivers/tty/tty_io.c:806 [inline]
__start_tty+0x116/0x150 drivers/tty/tty_io.c:799
n_tty_ioctl_helper+0x348/0x3a0 drivers/tty/tty_ioctl.c:917
n_hdlc_tty_ioctl+0x102/0x350 drivers/tty/n_hdlc.c:783
tty_ioctl+0x65d/0x15c0 drivers/tty/tty_io.c:2678
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x466459
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe73ef7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000003
RBP: 00000000004bf9cb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffde7d7d42f R14: 00007fe73ef7a300 R15: 0000000000022000
Unknown ioctl 21532
VFS: could not find a valid V7 on loop1.
Unknown ioctl 21532
nla_parse: 25 callbacks suppressed
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.0'.
audit: type=1800 audit(1616122788.734:1139): pid=980 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=13989 res=0
audit: type=1800 audit(1616122788.754:1140): pid=986 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=13989 res=0
vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(5)
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd: connection closed
vhci_hcd: stop threads
vhci_hcd: release socket
======================================================
vhci_hcd: disconnect device