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: 31593 Comm: syz-executor.4 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 03 f4 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:ffffc90004c3f918 EFLAGS: 00010203 RAX: 0000000020000001 RBX: dffffc0000000000 RCX: ffffc90011fad000 RDX: 0000000000040000 RSI: ffffffff83edc88d RDI: 0000000000000003 RBP: 00000000000007fe R08: ffffffff83ecc510 R09: ffff8880a83a0e48 R10: 0000000000000000 R11: 0000000000000000 R12: 000000010000000c R13: 0000000000000000 R14: ffff8880a2a7e000 R15: ffff8880a2a7e3dc FS: 00007fb18addf700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b90004 CR3: 00000000a25c1000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: con_put_char+0x96/0xe0 drivers/tty/vt/vt.c:3169 tty_put_char+0xb7/0x150 drivers/tty/tty_io.c:3031 do_output_char+0x155/0x850 drivers/tty/n_tty.c:488 process_output drivers/tty/n_tty.c:514 [inline] n_tty_write+0x481/0xf80 drivers/tty/n_tty.c:2345 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x4d9/0x870 drivers/tty/tty_io.c:1046 vfs_write+0x2b0/0x6b0 fs/read_write.c:576 ksys_write+0x12d/0x250 fs/read_write.c:631 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c1f9 Code: Bad RIP value. RSP: 002b:00007fb18addec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000036e00 RCX: 000000000045c1f9 RDX: 0000000000001006 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 0000000000c9fb6f R14: 00007fb18addf9c0 R15: 000000000078bf0c Modules linked in: ---[ end trace 6e4a3dec165bb7eb ]--- RIP: 0010:do_con_write+0x979/0x7400 drivers/tty/vt/vt.c:2786 Code: a4 24 ca 00 00 00 44 01 e5 e8 03 f4 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:ffffc90004c3f918 EFLAGS: 00010203 RAX: 0000000020000001 RBX: dffffc0000000000 RCX: ffffc90011fad000 RDX: 0000000000040000 RSI: ffffffff83edc88d RDI: 0000000000000003 RBP: 00000000000007fe R08: ffffffff83ecc510 R09: ffff8880a83a0e48 R10: 0000000000000000 R11: 0000000000000000 R12: 000000010000000c R13: 0000000000000000 R14: ffff8880a2a7e000 R15: ffff8880a2a7e3dc FS: 00007fb18addf700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000050e010 CR3: 00000000a25c1000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400