device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
pts pts145: tty_release: tty->count(3) != (#fd's(2) + #kopen's(0))
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 12772 Comm: syz-executor4 Not tainted 4.14.72+ #10
task: ffff8801ca488000 task.stack: ffff8801aa590000
RIP: 0010:reset_buffer_flags+0x21/0x150 drivers/tty/n_tty.c:323
RSP: 0018:ffff8801aa5978e0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 00000000000000d3
RDX: 000000000000044c RSI: ffffc9000c83e000 RDI: 0000000000002260
RBP: ffff88019f7d8880 R08: 0000000000000e35 R09: ffffffffaa0c9848
R10: ffff8801ca488880 R11: 0000000000000001 R12: ffff88019f7d8ab8
R13: ffff8801aa597938 R14: ffff8801d16b4d60 R15: 000000000000000b
FS:  00007f2cd7d9a700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001a1ba4005 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 n_tty_flush_buffer+0x49/0xeb drivers/tty/n_tty.c:361
 set_termios+0x259/0x440 drivers/tty/tty_ioctl.c:403
 tty_mode_ioctl+0x238/0x920 drivers/tty/tty_ioctl.c:744
 n_tty_ioctl_helper+0x3f/0x350 drivers/tty/tty_ioctl.c:939
 n_tty_ioctl+0x43/0x2e0 drivers/tty/n_tty.c:2452
 tty_ioctl+0x551/0x13e0 drivers/tty/tty_io.c:2654
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457579
RSP: 002b:00007f2cd7d99c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579
RDX: 0000000020000000 RSI: 0000000000005404 RDI: 0000000000000005
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2cd7d9a6d4
R13: 00000000004c0db8 R14: 00000000004d17d0 R15: 00000000ffffffff
Code: 41 ff 5b 5d e9 31 5f 5f ff 90 53 48 89 fb e8 27 5f 5f ff 48 8d bb 60 22 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 0f 01 00 00 48 c7 83 60 22 00 00 00 00 00 00 
RIP: reset_buffer_flags+0x21/0x150 drivers/tty/n_tty.c:323 RSP: ffff8801aa5978e0
---[ end trace 6817b7265148dc8f ]---