sp0: Synchronizing with TNC
general protection fault, probably for non-canonical address 0xdffffc001ffffff5: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x00000000ffffffa8-0x00000000ffffffaf]
CPU: 1 PID: 26305 Comm: syz-executor.1 Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write+0x1a6a/0xf2d0 drivers/tty/vt/vt.c:2786
Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 95 db b1 fd 48 8b 7c 24 60 48 8b 1f 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c5 02 00 00 66 44 89 33 48 c7 c7 24 40
RSP: 0018:ffffc90006c57a30 EFLAGS: 00010207
RAX: 000000001ffffff5 RBX: 00000000ffffffac RCX: 0000000000040000
RDX: ffffc90004201000 RSI: 0000000000007225 RDI: ffff8880a8c073f0
RBP: ffffc90006c57d20 R08: ffffffff8401c011 R09: ffffffff83ffec40
R10: 0000000000000006 R11: ffff8880568082c0 R12: ffff8880a8c07000
R13: dffffc0000000000 R14: 00000000000007fe R15: 1ffff11015180e7e
FS:  00007fc1ab645700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb433b5db8 CR3: 000000008f500000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_write+0x20/0x40 drivers/tty/vt/vt.c:3159
 tnc_init drivers/net/hamradio/6pack.c:536 [inline]
 sixpack_open+0x694/0x950 drivers/net/hamradio/6pack.c:632
 tty_ldisc_open drivers/tty/tty_ldisc.c:464 [inline]
 tty_set_ldisc+0x389/0x850 drivers/tty/tty_ldisc.c:591
 tiocsetd drivers/tty/tty_io.c:2333 [inline]
 tty_ioctl+0x1308/0x15c0 drivers/tty/tty_io.c:2593
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl fs/ioctl.c:753 [inline]
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:760
 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c1f9
Code: Bad RIP value.
RSP: 002b:00007fc1ab644c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000017f00 RCX: 000000000045c1f9
RDX: 0000000020000040 RSI: 0000000000005423 RDI: 0000000000000003
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffddef0d31f R14: 00007fc1ab6459c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 9f9d178182fbc98a ]---
RIP: 0010:do_con_write+0x1a6a/0xf2d0 drivers/tty/vt/vt.c:2786
Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 95 db b1 fd 48 8b 7c 24 60 48 8b 1f 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c5 02 00 00 66 44 89 33 48 c7 c7 24 40
RSP: 0018:ffffc90006c57a30 EFLAGS: 00010207
RAX: 000000001ffffff5 RBX: 00000000ffffffac RCX: 0000000000040000
RDX: ffffc90004201000 RSI: 0000000000007225 RDI: ffff8880a8c073f0
RBP: ffffc90006c57d20 R08: ffffffff8401c011 R09: ffffffff83ffec40
R10: 0000000000000006 R11: ffff8880568082c0 R12: ffff8880a8c07000
R13: dffffc0000000000 R14: 00000000000007fe R15: 1ffff11015180e7e
FS:  00007fc1ab645700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb433b5db8 CR3: 000000008f500000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400