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
Modules linked in:
CPU: 0 PID: 6472 Comm: syz-executor777 Not tainted 4.14.195-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888097fdc3c0 task.stack: ffff888098780000
RIP: 0010:file_tty drivers/tty/tty_io.c:179 [inline]
RIP: 0010:__tty_fasync drivers/tty/tty_io.c:2109 [inline]
RIP: 0010:tty_release+0xf0/0xe20 drivers/tty/tty_io.c:1655
RSP: 0018:ffff888098787d80 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888097184960
RBP: ffff888097184500 R08: ffffffff8a0a19e8 R09: 0000000000000001
R10: 0000000000000000 R11: ffff888097fdc3c0 R12: ffff8880a477eb70
R13: ffff88809e18bd3c R14: ffffffff834296d0 R15: ffff8880a694a600
FS:  00007fe2715d1700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2715afe78 CR3: 00000000a4c25000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4468a9
RSP: 002b:00007fe2715d0db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
RAX: 0000000000000000 RBX: 00000000006dbc58 RCX: 00000000004468a9
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000007
RBP: 00000000006dbc50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000380 R11: 0000000000000246 R12: 00000000006dbc5c
R13: 00007fff7b71419f R14: 00007fe2715d19c0 R15: 20c49ba5e353f7cf
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 10 0c 00 00 48 8b 04 24 48 8b 98 90 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ab 0b 00 00 48 8b 04 24 48 8b 1b 48 8d 78 20 
RIP: file_tty drivers/tty/tty_io.c:179 [inline] RSP: ffff888098787d80
RIP: __tty_fasync drivers/tty/tty_io.c:2109 [inline] RSP: ffff888098787d80
RIP: tty_release+0xf0/0xe20 drivers/tty/tty_io.c:1655 RSP: ffff888098787d80
---[ end trace 5737d22b212a06be ]---