general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f]
CPU: 0 PID: 6881 Comm: syz-executor047 Not tainted 5.9.0-rc1-next-20200818-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_poll_get_single fs/io_uring.c:4665 [inline]
RIP: 0010:io_poll_double_wake+0x51/0x510 fs/io_uring.c:4732
Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 9e 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 08 48 8d 7b 48 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 63 03 00 00 0f b6 6b 48 bf 06 00 00
RSP: 0018:ffffc900056c7820 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000009 RSI: ffffffff81d7793d RDI: 0000000000000048
RBP: dffffc0000000000 R08: ffff88809bf5ff18 R09: ffff8880a27a7d1f
R10: 0000000000000001 R11: 0000000000006660 R12: 0000000000000000
R13: ffff88809bf5ff18 R14: ffff88809bf5ff20 R15: 0000000000000000
FS:  00007fcb73980700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb7395ee78 CR3: 00000000a6b66000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __wake_up_common+0x147/0x650 kernel/sched/wait.c:93
 __wake_up_common_lock+0xd0/0x130 kernel/sched/wait.c:123
 n_tty_set_termios+0x73d/0x1010 drivers/tty/n_tty.c:1874
 tty_set_termios+0x5eb/0x840 drivers/tty/tty_ioctl.c:341
 set_termios.part.0+0x2be/0x4d0 drivers/tty/tty_ioctl.c:414
 set_termios drivers/tty/tty_ioctl.c:368 [inline]
 tty_mode_ioctl+0x899/0xb60 drivers/tty/tty_ioctl.c:745
 n_tty_ioctl_helper+0x55/0x3a0 drivers/tty/tty_ioctl.c:940
 n_tty_ioctl+0x56/0x370 drivers/tty/n_tty.c:2466
 tty_ioctl+0x10c5/0x15f0 drivers/tty/tty_io.c:2665
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x445c89
Code: e8 fc b8 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcb7397fda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445c89
RDX: 0000000020000080 RSI: 0000000000005404 RDI: 0000000000000005
RBP: 00000000006dac50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c
R13: 00007fffedb1707f R14: 00007fcb739809c0 R15: 20c49ba5e353f7cf
Modules linked in:
---[ end trace ff58babb5f9c371f ]---
RIP: 0010:io_poll_get_single fs/io_uring.c:4665 [inline]
RIP: 0010:io_poll_double_wake+0x51/0x510 fs/io_uring.c:4732
Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 9e 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 08 48 8d 7b 48 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 63 03 00 00 0f b6 6b 48 bf 06 00 00
RSP: 0018:ffffc900056c7820 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000009 RSI: ffffffff81d7793d RDI: 0000000000000048
RBP: dffffc0000000000 R08: ffff88809bf5ff18 R09: ffff8880a27a7d1f
R10: 0000000000000001 R11: 0000000000006660 R12: 0000000000000000
R13: ffff88809bf5ff18 R14: ffff88809bf5ff20 R15: 0000000000000000
FS:  00007fcb73980700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb7395ee78 CR3: 00000000a6b66000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400