general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 28914 Comm: syz-executor.1 Not tainted 6.3.0-rc6-next-20230414-syzkaller-12018-gd3f2cd248191 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:PageTail include/linux/page-flags.h:284 [inline]
RIP: 0010:folio_flags.constprop.0+0x22/0x150 include/linux/page-flags.h:311
Code: ff ff 66 0f 1f 44 00 00 41 54 49 89 fc 55 53 e8 14 80 44 ff 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f8 00 00 00 49 8b 5c 24 08 31 ff 83 e3 01 48 89
RSP: 0018:ffffc90015d17038 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000051 RCX: ffffc90004062000
RDX: 0000000000000000 RSI: ffffffff823ef67c RDI: 0000000000000006
RBP: ffff88809206b4b0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffffe
R13: 1ffff92002ba2e0c R14: 0000000000000000 R15: ffff88809206b4e0
FS:  00007faa94f57700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f2a000 CR3: 000000003f03b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 folio_test_uptodate include/linux/page-flags.h:699 [inline]
 ext4_read_merkle_tree_page+0xf7/0x4a0 fs/ext4/verity.c:369
 verify_data_block+0x4cf/0x1dc0 fs/verity/verify.c:200
 verify_data_blocks+0x207/0x260 fs/verity/verify.c:284
 fsverity_verify_blocks+0xc8/0x140 fs/verity/verify.c:315
 fsverity_verify_page include/linux/fsverity.h:259 [inline]
 ext4_mpage_readpages+0xc94/0x19a0 fs/ext4/readpage.c:337
 ext4_readahead+0x106/0x140 fs/ext4/inode.c:3179
 read_pages+0x1a2/0xd40 mm/readahead.c:161
 page_cache_ra_unbounded+0x477/0x5e0 mm/readahead.c:270
 do_page_cache_ra mm/readahead.c:300 [inline]
 page_cache_ra_order+0x6ec/0xa00 mm/readahead.c:560
 ondemand_readahead+0x6b3/0x1080 mm/readahead.c:682
 page_cache_sync_ra+0x1c9/0x200 mm/readahead.c:709
 page_cache_sync_readahead include/linux/pagemap.h:1211 [inline]
 filemap_get_pages+0x28d/0x1620 mm/filemap.c:2595
 filemap_read+0x32c/0xc30 mm/filemap.c:2690
 generic_file_read_iter+0x3ad/0x5b0 mm/filemap.c:2836
 ext4_file_read_iter+0x1d9/0x690 fs/ext4/file.c:147
 call_read_iter include/linux/fs.h:1848 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x6b1/0x960 fs/read_write.c:470
 ksys_read+0x12b/0x250 fs/read_write.c:613
 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: 0033:0x7faa9428c169
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:00007faa94f57168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007faa943ac120 RCX: 00007faa9428c169
RDX: 00000ffffffff000 RSI: 0000000020000300 RDI: 0000000000000004
RBP: 00007faa942e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff8dfc762f R14: 00007faa94f57300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:PageTail include/linux/page-flags.h:284 [inline]
RIP: 0010:folio_flags.constprop.0+0x22/0x150 include/linux/page-flags.h:311
Code: ff ff 66 0f 1f 44 00 00 41 54 49 89 fc 55 53 e8 14 80 44 ff 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f8 00 00 00 49 8b 5c 24 08 31 ff 83 e3 01 48 89
RSP: 0018:ffffc90015d17038 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000051 RCX: ffffc90004062000
RDX: 0000000000000000 RSI: ffffffff823ef67c RDI: 0000000000000006
RBP: ffff88809206b4b0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffffe
R13: 1ffff92002ba2e0c R14: 0000000000000000 R15: ffff88809206b4e0
FS:  00007faa94f57700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa94f36718 CR3: 000000003f03b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
   6:	41 54                	push   %r12
   8:	49 89 fc             	mov    %rdi,%r12
   b:	55                   	push   %rbp
   c:	53                   	push   %rbx
   d:	e8 14 80 44 ff       	callq  0xff448026
  12:	49 8d 7c 24 08       	lea    0x8(%r12),%rdi
  17:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1e:	fc ff df
  21:	48 89 fa             	mov    %rdi,%rdx
  24:	48 c1 ea 03          	shr    $0x3,%rdx
* 28:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2c:	0f 85 f8 00 00 00    	jne    0x12a
  32:	49 8b 5c 24 08       	mov    0x8(%r12),%rbx
  37:	31 ff                	xor    %edi,%edi
  39:	83 e3 01             	and    $0x1,%ebx
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89