------------[ cut here ]------------
WARNING: CPU: 0 PID: 5323 at ./include/linux/fsnotify.h:145 fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145
Modules linked in:
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00214-g21e4543a2e2f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145
Code: c3 cc cc cc cc e8 1b 7d c6 ff 49 83 ec 80 4c 89 e7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 21 9f 00 00 e8 fc 7c c6 ff 90 <0f> 0b 90 e9 0a ff ff ff 48 c7 c1 10 29 3d 90 80 e1 07 80 c1 03 38
RSP: 0018:ffffc9000d3cf0a0 EFLAGS: 00010283
RAX: ffffffff81fb61f4 RBX: 0000000000000001 RCX: 0000000000100000
RDX: ffffc9000eba3000 RSI: 00000000000002f0 RDI: 00000000000002f1
RBP: 0000000000008000 R08: ffffffff81fb60ec R09: 1ffff11008620a2e
R10: dffffc0000000000 R11: ffffed1008620a2f R12: ffff888000a65c40
R13: 0000000000000010 R14: dffffc0000000000 R15: ffffc9000d3cf1e0
FS:  00007fc7857d46c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000000480 CR3: 0000000036d9c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 filemap_fault+0x14a9/0x16c0 mm/filemap.c:3508
 __do_fault+0x135/0x390 mm/memory.c:4988
 do_read_fault mm/memory.c:5403 [inline]
 do_fault mm/memory.c:5537 [inline]
 do_pte_missing mm/memory.c:4058 [inline]
 handle_pte_fault mm/memory.c:5900 [inline]
 __handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6043
 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6212
 do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:fault_in_readable+0x111/0x2d0 mm/gup.c:2234
Code: 8b 6c 24 18 4c 89 ee 48 81 e6 ff 0f 00 00 31 ff e8 64 bc b4 ff 4c 89 e8 48 25 ff 0f 00 00 74 34 49 bf 00 00 00 00 00 fc ff df <41> 8a 5d 00 e8 66 b7 b4 ff 43 0f b6 04 3e 84 c0 0f 85 61 01 00 00
RSP: 0018:ffffc9000d3cf8a0 EFLAGS: 00050202
RAX: 0000000000000480 RBX: 0000400000000481 RCX: ffff888000b28000
RDX: ffffc9000eba3000 RSI: 0000000000000480 RDI: 0000000000000000
RBP: ffffc9000d3cf958 R08: ffffffff820d276c R09: ffffffff84f2e0d9
R10: 0000000000000002 R11: ffff888000b28000 R12: 0000000000000001
R13: 0000400000000480 R14: 1ffff92001a79f1c R15: dffffc0000000000
 fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
 generic_perform_write+0x260/0x990 mm/filemap.c:4178
 ext4_buffered_write_iter+0xc7/0x390 fs/ext4/file.c:299
 ext4_file_write_iter+0x88f/0x1ce0
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xacf/0xd10 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc78938d169
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc7857d4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc7895a6080 RCX: 00007fc78938d169
RDX: 0000000000000001 RSI: 0000400000000480 RDI: 0000000000000007
RBP: 00007fc78940e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fc7895a6080 R15: 00007ffedc72d468
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 6c 24 18          	mov    0x18(%rsp),%ebp
   4:	4c 89 ee             	mov    %r13,%rsi
   7:	48 81 e6 ff 0f 00 00 	and    $0xfff,%rsi
   e:	31 ff                	xor    %edi,%edi
  10:	e8 64 bc b4 ff       	call   0xffb4bc79
  15:	4c 89 e8             	mov    %r13,%rax
  18:	48 25 ff 0f 00 00    	and    $0xfff,%rax
  1e:	74 34                	je     0x54
  20:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  27:	fc ff df
* 2a:	41 8a 5d 00          	mov    0x0(%r13),%bl <-- trapping instruction
  2e:	e8 66 b7 b4 ff       	call   0xffb4b799
  33:	43 0f b6 04 3e       	movzbl (%r14,%r15,1),%eax
  38:	84 c0                	test   %al,%al
  3a:	0f 85 61 01 00 00    	jne    0x1a1