Hello, syzbot found the following issue on: HEAD commit: e45fb347b630 Add linux-next specific files for 20221220 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=11ebe9d7880000 kernel config: https://syzkaller.appspot.com/x/.config?x=8ae91cba504b4da8 dashboard link: https://syzkaller.appspot.com/bug?extid=f1a57e2f7ecadf4fe2cd compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11079eb3880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c68630480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1ae2b280f860/disk-e45fb347.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/253fc221144a/vmlinux-e45fb347.xz kernel image: https://storage.googleapis.com/syzbot-assets/e2695a52406f/bzImage-e45fb347.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/03bbfbf19079/mount_3.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f1a57e2f7ecadf4fe2cd@xxxxxxxxxxxxxxxxxxxxxxxxx memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5070 'syz-executor189' loop0: detected capacity change from 0 to 4096 ntfs3: loop0: Different NTFS' sector size (4096) and media sector size (512) general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 5070 Comm: syz-executor189 Not tainted 6.1.0-next-20221220-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:ntfs_security_init+0x26e/0xad0 fs/ntfs3/fsntfs.c:1879 Code: 44 24 08 83 f8 1f 0f 86 a4 06 00 00 e8 1b 52 d1 fe 49 01 ec e8 13 52 d1 fe 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 0f RSP: 0018:ffffc90003b9fa78 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88807612a000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff82b002cd RDI: 0000000000000005 RBP: ffff8880791aa160 R08: 0000000000000005 R09: 000000000000001f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880735744b0 R14: ffffc90003b9fad0 R15: ffff88807612a460 FS: 000055555681e3c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200001c0 CR3: 000000007cd11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ntfs_fill_super+0x3398/0x3ab0 fs/ntfs3/super.c:1287 get_tree_bdev+0x444/0x760 fs/super.c:1282 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 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: 0033:0x7f6957d4530a Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 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:00007ffc02858c98 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f6957d4530a RDX: 000000002001f180 RSI: 000000002001f1c0 RDI: 00007ffc02858cb0 RBP: 00007ffc02858cb0 R08: 00007ffc02858cf0 R09: 000000000001f164 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000005 R13: 000055555681e380 R14: 0000000000000000 R15: 00007ffc02858cf0 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ntfs_security_init+0x26e/0xad0 fs/ntfs3/fsntfs.c:1879 Code: 44 24 08 83 f8 1f 0f 86 a4 06 00 00 e8 1b 52 d1 fe 49 01 ec e8 13 52 d1 fe 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 0f RSP: 0018:ffffc90003b9fa78 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88807612a000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff82b002cd RDI: 0000000000000005 RBP: ffff8880791aa160 R08: 0000000000000005 R09: 000000000000001f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880735744b0 R14: ffffc90003b9fad0 R15: ffff88807612a460 FS: 000055555681e3c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200001c0 CR3: 000000007cd11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 44 24 08 rex.R and $0x8,%al 3: 83 f8 1f cmp $0x1f,%eax 6: 0f 86 a4 06 00 00 jbe 0x6b0 c: e8 1b 52 d1 fe callq 0xfed1522c 11: 49 01 ec add %rbp,%r12 14: e8 13 52 d1 fe callq 0xfed1522c 19: 4c 89 e2 mov %r12,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 4c 89 e0 mov %r12,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 0f test %ecx,(%rdi) --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
