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BUG: KASAN: user-memory-access in syscall_get_arguments arch/x86/include/asm/syscall.h:134 [inline]
BUG: KASAN: user-memory-access in trace_event_raw_event_sys_enter+0x223/0x4d0 include/trace/events/syscalls.h:18
Write of size 8 at addr 0000000000007fe8 by task syz-executor.5/12654

CPU: 0 PID: 12654 Comm: syz-executor.5 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 __kasan_report+0x167/0x1c0 mm/kasan/report.c:510
 kasan_report+0x26/0x50 mm/kasan/common.c:641
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/generic_report.c:140
 syscall_get_arguments arch/x86/include/asm/syscall.h:134 [inline]
 trace_event_raw_event_sys_enter+0x223/0x4d0 include/trace/events/syscalls.h:18
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:180
Code: 0b e8 23 00 00 00 0f 0b 90 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d b4 b1 f2 07 48 89 de e8 84 b4 3c 00 5b 5d c3 cc 55 <48> 89 e5 48 8b 45 08 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 34 14 8b
RSP: 0018:ffffc90016837790 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13
RAX: ffffffff83d0a818 RBX: 0000000003e133b7 RCX: 0000000000040000
RDX: ffffc90014231000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900168377f0 R08: ffffffff83d0a7cd R09: 0000000000000040
R10: ffff8880522ee2c0 R11: 0000000000000002 R12: ffff888001006240
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffffffffff
 cfb_fillrect+0x57b/0x7a0 drivers/video/fbdev/core/cfbfillrect.c:327
 vga16fb_fillrect+0x642/0x1470 drivers/video/fbdev/vga16fb.c:951
 bit_clear_margins+0x25a/0x620 drivers/video/fbdev/core/bitblit.c:224
 fbcon_clear_margins drivers/video/fbdev/core/fbcon.c:1379 [inline]
 fbcon_switch+0x1504/0x1f10 drivers/video/fbdev/core/fbcon.c:2361
 redraw_screen+0x56e/0x1830 drivers/tty/vt/vt.c:1008
 fbcon_modechanged+0x810/0xdf0 drivers/video/fbdev/core/fbcon.c:2998
 fbcon_update_vcs+0x31/0x40 drivers/video/fbdev/core/fbcon.c:3045
 fb_set_var+0x8f5/0xdc0 drivers/video/fbdev/core/fbmem.c:1056
 do_fb_ioctl+0x55e/0x780 drivers/video/fbdev/core/fbmem.c:1109
 fb_ioctl+0xb9/0xf0 drivers/video/fbdev/core/fbmem.c:1185
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:763 [inline]
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl+0x113/0x190 fs/ioctl.c:770
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:770
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c429
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0fe738fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0fe73906d4 RCX: 000000000045c429
RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000002ef R14: 00000000004c5056 R15: 000000000076bf2c
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