general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] CPU: 1 PID: 6163 Comm: syz-executor.5 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+0x979/0x7400 drivers/tty/vt/vt.c:2786 Code: a4 24 ca 00 00 00 44 01 e5 e8 43 ec 85 fd 48 8b 44 24 50 80 38 00 0f 85 28 27 00 00 4d 8b a6 f0 03 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 14 18 4c 89 e0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 13 RSP: 0018:ffffc900182cf858 EFLAGS: 00010203 RAX: 0000000020000001 RBX: dffffc0000000000 RCX: ffffc900140de000 RDX: 0000000000040000 RSI: ffffffff83edd04d RDI: 0000000000000003 RBP: 00000000000007fe R08: ffffffff83ecccd0 R09: ffff888093b3adc8 R10: 0000000000000000 R11: 0000000000000000 R12: 000000010000000e R13: 0000000000000000 R14: ffff888093f9e000 R15: ffff888093f9e3dc FS: 00007f7289481700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004da050 CR3: 000000004de75000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: con_write+0x22/0xb0 drivers/tty/vt/vt.c:3159 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0x3ce/0xf80 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x4d9/0x870 drivers/tty/tty_io.c:1046 do_loop_readv_writev fs/read_write.c:737 [inline] do_loop_readv_writev fs/read_write.c:721 [inline] do_iter_write+0x48b/0x5f0 fs/read_write.c:1020 vfs_writev+0x1aa/0x2e0 fs/read_write.c:1091 do_writev+0x139/0x300 fs/read_write.c:1134 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c369 Code: Bad RIP value. RSP: 002b:00007f7289480c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000038240 RCX: 000000000045c369 RDX: 0000000000000001 RSI: 0000000020000800 RDI: 0000000000000003 RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 0000000000c9fb6f R14: 00007f72894819c0 R15: 000000000078bf0c Modules linked in: ---[ end trace 4894a6e0d422bbdd ]--- RIP: 0010:do_con_write+0x979/0x7400 drivers/tty/vt/vt.c:2786 Code: a4 24 ca 00 00 00 44 01 e5 e8 43 ec 85 fd 48 8b 44 24 50 80 38 00 0f 85 28 27 00 00 4d 8b a6 f0 03 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 14 18 4c 89 e0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 13 RSP: 0018:ffffc900182cf858 EFLAGS: 00010203 RAX: 0000000020000001 RBX: dffffc0000000000 RCX: ffffc900140de000 RDX: 0000000000040000 RSI: ffffffff83edd04d RDI: 0000000000000003 RBP: 00000000000007fe R08: ffffffff83ecccd0 R09: ffff888093b3adc8 R10: 0000000000000000 R11: 0000000000000000 R12: 000000010000000e R13: 0000000000000000 R14: ffff888093f9e000 R15: ffff888093f9e3dc FS: 00007f7289481700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb9003f188 CR3: 000000004de75000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400