audit: type=1804 audit(1609070843.339:57): pid=17513 uid=0 auid=0 ses=4 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir946828614/syzkaller.bIPgDF/251/bus" dev="sda1" ino=16567 res=1 audit: type=1804 audit(1609070843.379:58): pid=17513 uid=0 auid=0 ses=4 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir946828614/syzkaller.bIPgDF/251/bus" dev="sda1" ino=16567 res=1 BUG: unable to handle kernel paging request at ffff888001000000 IP: __writel arch/x86/include/asm/io.h:71 [inline] IP: fast_imageblit drivers/video/fbdev/core/cfbimgblt.c:257 [inline] IP: cfb_imageblit+0x847/0xe40 drivers/video/fbdev/core/cfbimgblt.c:300 PGD c9c5067 P4D c9c5067 PUD c9c6067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 17554 Comm: syz-executor.1 Not tainted 4.14.212-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a3458280 task.stack: ffff88803c358000 RIP: 0010:__writel arch/x86/include/asm/io.h:71 [inline] RIP: 0010:fast_imageblit drivers/video/fbdev/core/cfbimgblt.c:257 [inline] RIP: 0010:cfb_imageblit+0x847/0xe40 drivers/video/fbdev/core/cfbimgblt.c:300 RSP: 0000:ffff88803c35f1c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888238f803e0 RCX: 0000000000000004 RDX: 0000000000040000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffff888001000004 R08: 00000000000004eb R09: 0000000000000000 R10: 0000000000000050 R11: 0000000000000010 R12: dffffc0000000000 R13: 0000000000000004 R14: 0000000000000004 R15: ffff888001000000 FS: 00007fe45af9d700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000000 CR3: 00000000a0e40000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1208 [inline] vga16fb_imageblit+0x630/0x2140 drivers/video/fbdev/vga16fb.c:1261 bit_putcs_unaligned drivers/video/fbdev/core/bitblit.c:139 [inline] bit_putcs+0x81e/0xc30 drivers/video/fbdev/core/bitblit.c:188 fbcon_putcs+0x2fe/0x480 drivers/video/fbdev/core/fbcon.c:1247 con_flush drivers/tty/vt/vt.c:2206 [inline] do_con_write+0x908/0x19b0 drivers/tty/vt/vt.c:2410 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2805 n_tty_write+0x85e/0xda0 drivers/tty/n_tty.c:2356 do_tty_write drivers/tty/tty_io.c:959 [inline] tty_write+0x410/0x740 drivers/tty/tty_io.c:1043 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e229 RSP: 002b:00007fe45af9cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e229 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000008 RBP: 000000000119c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0800000080004103 R11: 0000000000000246 R12: 000000000119c184 R13: 00007ffd9349b39f R14: 00007fe45af9d9c0 R15: 000000000119c184 Code: 0f b6 3c 26 48 89 c6 83 e6 07 83 c6 03 40 38 fe 7c 09 40 84 ff 0f 85 8f 05 00 00 8b 7c 24 20 49 8d 6f 04 23 38 8b 44 24 10 31 f8 <41> 89 07 45 85 f6 75 0f e8 bc 27 15 fe 48 83 c3 01 41 be 08 00 RIP: __writel arch/x86/include/asm/io.h:71 [inline] RSP: ffff88803c35f1c8 RIP: fast_imageblit drivers/video/fbdev/core/cfbimgblt.c:257 [inline] RSP: ffff88803c35f1c8 RIP: cfb_imageblit+0x847/0xe40 drivers/video/fbdev/core/cfbimgblt.c:300 RSP: ffff88803c35f1c8 CR2: ffff888001000000 ---[ end trace 17e2d2025b26141e ]---