RBP: 00007ffcf4b86c60 R08: 0000000000000001 R09: 00007f8864480038 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5300 Comm: syz-executor992 Not tainted 6.1.0-syzkaller-09941-ge2ca6ba6ba01 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:_compound_head include/linux/page-flags.h:250 [inline] RIP: 0010:unlock_page+0x24/0x130 mm/folio-compat.c:20 Code: 00 00 00 00 00 90 41 57 41 56 41 54 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 97 da ce ff 49 8d 5e 08 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 2d 74 24 00 48 8b 1b 48 89 de 48 RSP: 0018:ffffc90003c1f708 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888026ec8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff82ccf6fe R09: fffff9400039dc59 R10: fffff9400039dc59 R11: 1ffffd400039dc58 R12: ffff88802b93a788 R13: 00000000fffffff4 R14: 0000000000000000 R15: dffffc0000000000 FS: 00005555568c8300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002a04e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ni_readpage_cmpr+0x57d/0xa90 fs/ntfs3/frecord.c:2139 ntfs_read_folio+0x175/0x1e0 fs/ntfs3/inode.c:697 filemap_read_folio+0x187/0x7d0 mm/filemap.c:2426 filemap_create_folio mm/filemap.c:2555 [inline] filemap_get_pages+0xadb/0x10d0 mm/filemap.c:2607 filemap_read+0x3cf/0xea0 mm/filemap.c:2694 call_read_iter include/linux/fs.h:2180 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7ac/0xbf0 fs/read_write.c:470 ksys_pread64 fs/read_write.c:665 [inline] __do_sys_pread64 fs/read_write.c:675 [inline] __se_sys_pread64 fs/read_write.c:672 [inline] __x64_sys_pread64+0x1af/0x240 fs/read_write.c:672 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f88644cdc89 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf4b86c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f88644cdc89 RDX: 0000000000000040 RSI: 00000000200001c0 RDI: 0000000000000005 RBP: 00007ffcf4b86c60 R08: 0000000000000001 R09: 00007f8864480038 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:250 [inline] RIP: 0010:unlock_page+0x24/0x130 mm/folio-compat.c:20 Code: 00 00 00 00 00 90 41 57 41 56 41 54 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 97 da ce ff 49 8d 5e 08 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 2d 74 24 00 48 8b 1b 48 89 de 48 RSP: 0018:ffffc90003c1f708 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888026ec8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff82ccf6fe R09: fffff9400039dc59 R10: fffff9400039dc59 R11: 1ffffd400039dc58 R12: ffff88802b93a788 R13: 00000000fffffff4 R14: 0000000000000000 R15: dffffc0000000000 FS: 00005555568c8300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002a04e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 90 41 57 41 56 add %dl,0x56415741(%rax) a: 41 54 push %r12 c: 53 push %rbx d: 49 89 fe mov %rdi,%r14 10: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 17: fc ff df 1a: e8 97 da ce ff callq 0xffcedab6 1f: 49 8d 5e 08 lea 0x8(%r14),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 2d 74 24 00 callq 0x247466 39: 48 8b 1b mov (%rbx),%rbx 3c: 48 89 de mov %rbx,%rsi 3f: 48 rex.W