RBP: 00007ffc08865240 R08: 0000000000000002 R09: 000000000000000d R10: 000000000000c049 R11: 0000000000000246 R12: 0000000000000006 R13: 0000000000000000 R14: 431bde82d7b634db 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: 1 PID: 3542 Comm: syz-executor161 Not tainted 6.1.32-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:_compound_head include/linux/page-flags.h:253 [inline] RIP: 0010:unlock_page+0x24/0x130 mm/folio-compat.c:20 Code: 66 0f 1f 44 00 00 41 57 41 56 41 54 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 07 2b d0 ff 49 8d 5e 08 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 1d 72 26 00 48 8b 1b 48 89 de 48 RSP: 0018:ffffc90003acf3b0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888029575940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff82c7ee1c R09: fffff94000381331 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000007 R13: 00000000fffffff4 R14: 0000000000000000 R15: dffffc0000000000 FS: 00005555571f5300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f69bdd95ed8 CR3: 000000001839d000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ni_readpage_cmpr+0x582/0xa70 fs/ntfs3/frecord.c:2148 ntfs_read_folio+0x19a/0x210 fs/ntfs3/inode.c:713 filemap_read_folio+0x199/0x780 mm/filemap.c:2407 filemap_create_folio mm/filemap.c:2536 [inline] filemap_get_pages mm/filemap.c:2589 [inline] filemap_read+0x122a/0x31d0 mm/filemap.c:2676 call_read_iter include/linux/fs.h:2199 [inline] generic_file_splice_read+0x23c/0x630 fs/splice.c:309 do_splice_to fs/splice.c:793 [inline] splice_direct_to_actor+0x408/0xbd0 fs/splice.c:865 do_splice_direct+0x27f/0x3c0 fs/splice.c:974 do_sendfile+0x61c/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309 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: 0033:0x7f07dffc25c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 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:00007ffc08865228 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f07dffc25c9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 RBP: 00007ffc08865240 R08: 0000000000000002 R09: 000000000000000d R10: 000000000000c049 R11: 0000000000000246 R12: 0000000000000006 R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_compound_head include/linux/page-flags.h:253 [inline] RIP: 0010:unlock_page+0x24/0x130 mm/folio-compat.c:20 Code: 66 0f 1f 44 00 00 41 57 41 56 41 54 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 07 2b d0 ff 49 8d 5e 08 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 1d 72 26 00 48 8b 1b 48 89 de 48 RSP: 0018:ffffc90003acf3b0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888029575940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff82c7ee1c R09: fffff94000381331 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000007 R13: 00000000fffffff4 R14: 0000000000000000 R15: dffffc0000000000 FS: 00005555571f5300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f07e0053140 CR3: 000000001839d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 6: 41 57 push %r15 8: 41 56 push %r14 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 07 2b d0 ff callq 0xffd02b26 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 1d 72 26 00 callq 0x267256 39: 48 8b 1b mov (%rbx),%rbx 3c: 48 89 de mov %rbx,%rsi 3f: 48 rex.W