BUG: unable to handle page fault for address: ffff888001000008 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 10e01067 P4D 10e01067 PUD 10e02067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 0 PID: 32080 Comm: syz-executor.0 Not tainted 5.15.0-rc1-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+0x141/0x270 drivers/video/fbdev/core/cfbfillrect.c:50 Code: 49 89 ef 31 ed 31 ff 44 89 e6 e8 6a 1f 2e fd 41 83 fc 01 48 19 ed 4c 09 fd 48 23 6c 24 10 48 8b 03 49 31 c6 49 21 ee 49 31 c6 <4c> 89 33 e9 d5 00 00 00 e8 32 1b 2e fd 4c 8b 7c 24 08 44 89 e8 31 RSP: 0018:ffffc9000458f158 EFLAGS: 00010246 RAX: e856fffffff23d8d RBX: ffff888001000008 RCX: 0000000000040000 RDX: ffff888033729c80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffffffffffff R08: ffffffff84545a06 R09: 0000000000000040 R10: 0000000000000002 R11: ffff888033729c80 R12: 0000000000000000 R13: 0000000000000040 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1b7704f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000008 CR3: 000000006ad8c000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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 vc_do_resize+0x1361/0x1930 drivers/tty/vt/vt.c:1342 vt_resizex drivers/tty/vt/vt_ioctl.c:718 [inline] vt_ioctl+0x2ed4/0x3860 drivers/tty/vt/vt_ioctl.c:936 tty_ioctl+0xfb2/0x17d0 drivers/tty/tty_io.c:2805 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: 0033:0x7f1b79ad8739 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:00007f1b7704f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1b79bdcf80 RCX: 00007f1b79ad8739 RDX: 0000000020000040 RSI: 000000000000560a RDI: 0000000000000003 RBP: 00007f1b79b32cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1b79bdcf80 R13: 00007ffdbcacadef R14: 00007f1b7704f300 R15: 0000000000022000 Modules linked in: CR2: ffff888001000008 ---[ end trace e14787d3d0c6a49f ]--- RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned+0x141/0x270 drivers/video/fbdev/core/cfbfillrect.c:50 Code: 49 89 ef 31 ed 31 ff 44 89 e6 e8 6a 1f 2e fd 41 83 fc 01 48 19 ed 4c 09 fd 48 23 6c 24 10 48 8b 03 49 31 c6 49 21 ee 49 31 c6 <4c> 89 33 e9 d5 00 00 00 e8 32 1b 2e fd 4c 8b 7c 24 08 44 89 e8 31 RSP: 0018:ffffc9000458f158 EFLAGS: 00010246 RAX: e856fffffff23d8d RBX: ffff888001000008 RCX: 0000000000040000 RDX: ffff888033729c80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffffffffffff R08: ffffffff84545a06 R09: 0000000000000040 R10: 0000000000000002 R11: ffff888033729c80 R12: 0000000000000000 R13: 0000000000000040 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1b7704f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000008 CR3: 000000006ad8c000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 49 89 ef mov %rbp,%r15 3: 31 ed xor %ebp,%ebp 5: 31 ff xor %edi,%edi 7: 44 89 e6 mov %r12d,%esi a: e8 6a 1f 2e fd callq 0xfd2e1f79 f: 41 83 fc 01 cmp $0x1,%r12d 13: 48 19 ed sbb %rbp,%rbp 16: 4c 09 fd or %r15,%rbp 19: 48 23 6c 24 10 and 0x10(%rsp),%rbp 1e: 48 8b 03 mov (%rbx),%rax 21: 49 31 c6 xor %rax,%r14 24: 49 21 ee and %rbp,%r14 27: 49 31 c6 xor %rax,%r14 * 2a: 4c 89 33 mov %r14,(%rbx) <-- trapping instruction 2d: e9 d5 00 00 00 jmpq 0x107 32: e8 32 1b 2e fd callq 0xfd2e1b69 37: 4c 8b 7c 24 08 mov 0x8(%rsp),%r15 3c: 44 89 e8 mov %r13d,%eax 3f: 31 .byte 0x31