BUG: unable to handle page fault for address: ffff888001000000 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 11201067 P4D 11201067 PUD 11202067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 0 PID: 13060 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned+0x18b/0x270 drivers/video/fbdev/core/cfbfillrect.c:71 Code: 00 00 89 c6 e8 26 64 2c fd 83 fd 07 76 37 90 4c 89 33 4c 89 73 08 4c 89 73 10 4c 89 73 18 4c 89 73 20 4c 89 73 28 4c 89 73 30 <4c> 89 73 38 83 c5 f8 83 fd 07 76 16 48 83 c3 38 e8 e0 5f 2c fd 48 RSP: 0018:ffffc9000a81f778 EFLAGS: 00010282 RAX: ffffffff8457e500 RBX: ffff888000ffffc8 RCX: 0000000000040000 RDX: ffffc9000e185000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 000000000000004b R08: ffffffff8457e4ca R09: 0000000000000040 R10: 0000000000000002 R11: ffff888014bf9d00 R12: ffffffffffffffff R13: 00000000000018c0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fd98474e700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000000 CR3: 000000002f489000 CR4: 00000000003506f0 Call Trace: <TASK> cfb_fillrect+0x5d8/0x800 drivers/video/fbdev/core/cfbfillrect.c:327 bit_clear_margins+0x2d7/0x6e0 drivers/video/fbdev/core/bitblit.c:224 fbcon_clear_margins drivers/video/fbdev/core/fbcon.c:1315 [inline] fbcon_switch+0x16bb/0x2340 drivers/video/fbdev/core/fbcon.c:2146 redraw_screen+0x53d/0x1280 drivers/tty/vt/vt.c:1021 do_fb_ioctl+0x7f2/0x900 drivers/video/fbdev/core/fbmem.c:1114 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd9871d8ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd98474e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd9872ebf60 RCX: 00007fd9871d8ae9 RDX: 00000000200002c0 RSI: 0000000000004601 RDI: 0000000000000003 RBP: 00007fd987232f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff35bd097f R14: 00007fd98474e300 R15: 0000000000022000 </TASK> Modules linked in: CR2: ffff888001000000 BUG: unable to handle page fault for address: ffff888001000000 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 11201067 P4D 11201067 PUD 11202067 PMD 80000000010001e1 Oops: 0003 [#2] PREEMPT SMP KASAN CPU: 0 PID: 13060 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned+0x18b/0x270 drivers/video/fbdev/core/cfbfillrect.c:71 Code: 00 00 89 c6 e8 26 64 2c fd 83 fd 07 76 37 90 4c 89 33 4c 89 73 08 4c 89 73 10 4c 89 73 18 4c 89 73 20 4c 89 73 28 4c 89 73 30 <4c> 89 73 38 83 c5 f8 83 fd 07 76 16 48 83 c3 38 e8 e0 5f 2c fd 48 RSP: 0018:ffffc9000a81ecd8 EFLAGS: 00010082 RAX: ffffffff8457e500 RBX: ffff888000ffffc8 RCX: 0000000000040000 RDX: ffffc9000e185000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 000000000000004b R08: ffffffff8457e4ca R09: 0000000000000040 R10: 0000000000000002 R11: ffff888014bf9d00 R12: ffffffffffffffff R13: 00000000000018c0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fd98474e700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000000 CR3: 000000002f489000 CR4: 00000000003506f0 Call Trace: <TASK> cfb_fillrect+0x5d8/0x800 drivers/video/fbdev/core/cfbfillrect.c:327 bit_clear_margins+0x2d7/0x6e0 drivers/video/fbdev/core/bitblit.c:224 fbcon_clear_margins drivers/video/fbdev/core/fbcon.c:1315 [inline] fbcon_switch+0x16bb/0x2340 drivers/video/fbdev/core/fbcon.c:2146 redraw_screen+0x53d/0x1280 drivers/tty/vt/vt.c:1021 fbcon_blank+0x556/0xa50 drivers/video/fbdev/core/fbcon.c:2207 do_unblank_screen+0x27c/0xb20 drivers/tty/vt/vt.c:4438 bust_spinlocks+0x43/0xd0 lib/bust_spinlocks.c:26 oops_end+0x45/0x140 arch/x86/kernel/dumpstack.c:361 page_fault_oops+0x838/0xaa0 arch/x86/mm/fault.c:708 __bad_area_nosemaphore+0x127/0x590 arch/x86/mm/fault.c:806 do_kern_addr_fault arch/x86/mm/fault.c:1207 [inline] handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x15b/0x1e0 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned+0x18b/0x270 drivers/video/fbdev/core/cfbfillrect.c:71 Code: 00 00 89 c6 e8 26 64 2c fd 83 fd 07 76 37 90 4c 89 33 4c 89 73 08 4c 89 73 10 4c 89 73 18 4c 89 73 20 4c 89 73 28 4c 89 73 30 <4c> 89 73 38 83 c5 f8 83 fd 07 76 16 48 83 c3 38 e8 e0 5f 2c fd 48 RSP: 0018:ffffc9000a81f778 EFLAGS: 00010282 RAX: ffffffff8457e500 RBX: ffff888000ffffc8 RCX: 0000000000040000 RDX: ffffc9000e185000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 000000000000004b R08: ffffffff8457e4ca R09: 0000000000000040 R10: 0000000000000002 R11: ffff888014bf9d00 R12: ffffffffffffffff R13: 00000000000018c0 R14: 0000000000000000 R15: 0000000000000000 cfb_fillrect+0x5d8/0x800 drivers/video/fbdev/core/cfbfillrect.c:327 bit_clear_margins+0x2d7/0x6e0 drivers/video/fbdev/core/bitblit.c:224 fbcon_clear_margins drivers/video/fbdev/core/fbcon.c:1315 [inline] fbcon_switch+0x16bb/0x2340 drivers/video/fbdev/core/fbcon.c:2146 redraw_screen+0x53d/0x1280 drivers/tty/vt/vt.c:1021 do_fb_ioctl+0x7f2/0x900 drivers/video/fbdev/core/fbmem.c:1114 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd9871d8ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd98474e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd9872ebf60 RCX: 00007fd9871d8ae9 RDX: 00000000200002c0 RSI: 0000000000004601 RDI: 0000000000000003 RBP: 00007fd987232f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff35bd097f R14: 00007fd98474e300 R15: 0000000000022000 </TASK> Modules linked in: CR2: ffff888001000000 ---[ end trace 639e4ef7eb7f776b ]--- RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned+0x18b/0x270 drivers/video/fbdev/core/cfbfillrect.c:71 Code: 00 00 89 c6 e8 26 64 2c fd 83 fd 07 76 37 90 4c 89 33 4c 89 73 08 4c 89 73 10 4c 89 73 18 4c 89 73 20 4c 89 73 28 4c 89 73 30 <4c> 89 73 38 83 c5 f8 83 fd 07 76 16 48 83 c3 38 e8 e0 5f 2c fd 48 RSP: 0018:ffffc9000a81f778 EFLAGS: 00010282 RAX: ffffffff8457e500 RBX: ffff888000ffffc8 RCX: 0000000000040000 RDX: ffffc9000e185000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 000000000000004b R08: ffffffff8457e4ca R09: 0000000000000040 R10: 0000000000000002 R11: ffff888014bf9d00 R12: ffffffffffffffff R13: 00000000000018c0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fd98474e700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000000 CR3: 000000002f489000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 89 c6 mov %eax,%esi 4: e8 26 64 2c fd callq 0xfd2c642f 9: 83 fd 07 cmp $0x7,%ebp c: 76 37 jbe 0x45 e: 90 nop f: 4c 89 33 mov %r14,(%rbx) 12: 4c 89 73 08 mov %r14,0x8(%rbx) 16: 4c 89 73 10 mov %r14,0x10(%rbx) 1a: 4c 89 73 18 mov %r14,0x18(%rbx) 1e: 4c 89 73 20 mov %r14,0x20(%rbx) 22: 4c 89 73 28 mov %r14,0x28(%rbx) 26: 4c 89 73 30 mov %r14,0x30(%rbx) * 2a: 4c 89 73 38 mov %r14,0x38(%rbx) <-- trapping instruction 2e: 83 c5 f8 add $0xfffffff8,%ebp 31: 83 fd 07 cmp $0x7,%ebp 34: 76 16 jbe 0x4c 36: 48 83 c3 38 add $0x38,%rbx 3a: e8 e0 5f 2c fd callq 0xfd2c601f 3f: 48 rex.W