BUG: unable to handle page fault for address: 0000000020081000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 79e39067 P4D 79e39067 PUD 1b970067 PMD 2071e067 PTE 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 15793 Comm: syz-executor.1 Not tainted 6.2.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
RIP: 0010:clear_user_rep_good+0x1c/0x30 arch/x86/lib/clear_page_64.S:147
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 83 f9 40 72 a6 89 ca 48 c1 e9 03 74 03 f3 48 ab 83 e2 07 74 04 89 d1 <f3> aa 31 c0 c3 48 c1 e1 03 83 e2 07 48 01 d1 eb f1 0f 1f 00 f3 0f
RSP: 0018:ffffc90003ebf768 EFLAGS: 00050202
RAX: 0000000000000000 RBX: ffffc90003ebfdb0 RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffffffff896ba100 RDI: 0000000020081000
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8d65c057
R10: fffffbfff1acb80a R11: ffffc90003ebf9e8 R12: 0000000000081002
R13: ffffc90003ebfda8 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f79b1f86700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020081000 CR3: 000000002740d000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 __clear_user arch/x86/include/asm/uaccess_64.h:103 [inline]
 clear_user arch/x86/include/asm/uaccess_64.h:124 [inline]
 iov_iter_zero+0x55f/0x1080 lib/iov_iter.c:794
 iomap_dio_hole_iter fs/iomap/direct-io.c:383 [inline]
 iomap_dio_iter fs/iomap/direct-io.c:434 [inline]
 __iomap_dio_rw+0xb64/0x19e0 fs/iomap/direct-io.c:595
 iomap_dio_rw+0xd/0x30 fs/iomap/direct-io.c:683
 ext4_dio_read_iter fs/ext4/file.c:94 [inline]
 ext4_file_read_iter+0x3c8/0x570 fs/ext4/file.c:145
 call_read_iter include/linux/fs.h:1845 [inline]
 do_iter_readv_writev+0x235/0x2e0 fs/read_write.c:733
 do_iter_read+0x25f/0x690 fs/read_write.c:796
 vfs_readv+0xc3/0x130 fs/read_write.c:916
 do_preadv+0x151/0x1f0 fs/read_write.c:1008
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f79b128c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f79b1f86168 EFLAGS: 00000246 ORIG_RAX: 0000000000000147
RAX: ffffffffffffffda RBX: 00007f79b13abf80 RCX: 00007f79b128c0c9
RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007f79b12e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000007fffe R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff631fa0df R14: 00007f79b1f86300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: 0000000020081000
---[ end trace 0000000000000000 ]---
RIP: 0010:clear_user_rep_good+0x1c/0x30 arch/x86/lib/clear_page_64.S:147
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 83 f9 40 72 a6 89 ca 48 c1 e9 03 74 03 f3 48 ab 83 e2 07 74 04 89 d1 <f3> aa 31 c0 c3 48 c1 e1 03 83 e2 07 48 01 d1 eb f1 0f 1f 00 f3 0f
RSP: 0018:ffffc90003ebf768 EFLAGS: 00050202
RAX: 0000000000000000 RBX: ffffc90003ebfdb0 RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffffffff896ba100 RDI: 0000000020081000
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8d65c057
R10: fffffbfff1acb80a R11: ffffc90003ebf9e8 R12: 0000000000081002
R13: ffffc90003ebfda8 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f79b1f86700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c22eb0000 CR3: 000000002740d000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	66 66 2e 0f 1f 84 00 	data16 nopw %cs:0x0(%rax,%rax,1)
   7:	00 00 00 00
   b:	0f 1f 00             	nopl   (%rax)
   e:	f3 0f 1e fa          	endbr64
  12:	48 83 f9 40          	cmp    $0x40,%rcx
  16:	72 a6                	jb     0xffffffbe
  18:	89 ca                	mov    %ecx,%edx
  1a:	48 c1 e9 03          	shr    $0x3,%rcx
  1e:	74 03                	je     0x23
  20:	f3 48 ab             	rep stos %rax,%es:(%rdi)
  23:	83 e2 07             	and    $0x7,%edx
  26:	74 04                	je     0x2c
  28:	89 d1                	mov    %edx,%ecx
* 2a:	f3 aa                	rep stos %al,%es:(%rdi) <-- trapping instruction
  2c:	31 c0                	xor    %eax,%eax
  2e:	c3                   	retq
  2f:	48 c1 e1 03          	shl    $0x3,%rcx
  33:	83 e2 07             	and    $0x7,%edx
  36:	48 01 d1             	add    %rdx,%rcx
  39:	eb f1                	jmp    0x2c
  3b:	0f 1f 00             	nopl   (%rax)
  3e:	f3                   	repz
  3f:	0f                   	.byte 0xf