BUG: unable to handle kernel paging request in bitfill

BUG: unable to handle kernel paging request in bitfill_aligned (2)
Status: upstream: reported on 2020/11/17 20:47
Reported-by: syzbot+a4edd73d589b0b7efbeb@syzkaller.appspotmail.com
First crash: 348d, last: 19d

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	BUG: unable to handle kernel paging request in bitfill_aligned				1	536d	534d	0/22	closed as dup on 2020/08/16 15:35

Sample crash report:

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

Crashes (14):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/09/17 19:14	upstream	ddf21bd8ab98	70b76c1d	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-upstream-kasan-gce	2021/08/02 04:48	upstream	d4affd6b6e81	6c236867	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-upstream-kasan-gce-smack-root	2021/06/16 01:37	upstream	94f0b2d4a1d0	990d3cbe	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/06/23 00:41	upstream	bf152b0b41dc	aba2b2fb	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/06/10 18:35	upstream	bf152b0b41dc	1ba81399	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/05/10 07:12	upstream	bf152b0b41dc	bc5434be	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/04/11 07:57	upstream	bf152b0b41dc	bfeda1b1	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/04/01 16:56	upstream	bf152b0b41dc	6a81331a	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/03/20 18:46	upstream	bf152b0b41dc	878fc870	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-qemu2-arm32	2021/03/17 09:38	upstream	1a4431a5db2b	fdb2bb2c	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-upstream-linux-next-kasan-gce-root	2021/10/09 13:05	linux-next	683f29b781ae	838e7e2c	.config	log	report	info	BUG: unable to handle kernel paging request in bitfill_aligned
ci-upstream-kasan-gce-386	2020/11/28 07:23	upstream	99c710c46dfc	486f93ef	.config	log	report	info
ci-upstream-kasan-gce-386	2020/11/16 00:47	upstream	0062442ecfef	1bf9a662	.config	log	report	info
ci-upstream-kasan-gce-386	2020/11/13 18:26	upstream	585e5b17b92d	e1140d25	.config	log	report	info