[Linux-ntfs-dev] [syzbot] [ntfs?] kernel BUG in ntfs_iget

[syzbot <syz...@sy...>]

Hello,

syzbot found the following issue on:

HEAD commit:    307e14c03906 Merge tag '6.3-rc-smb3-client-fixes' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12974f28c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=636897a0dac3d81e
dashboard link: https://syzkaller.appspot.com/bug?extid=d62e6bd2a2d05103d105
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/970f2d144bf1/disk-307e14c0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1ba101847b5b/vmlinux-307e14c0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/21e98f0fe45e/bzImage-307e14c0.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syz...@sy...

loop3: detected capacity change from 0 to 4096
------------[ cut here ]------------
kernel BUG at fs/ntfs/malloc.h:31!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16279 Comm: syz-executor.3 Not tainted 6.2.0-syzkaller-06742-g307e14c03906 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:__ntfs_malloc fs/ntfs/malloc.h:31 [inline]
RIP: 0010:ntfs_malloc_nofs+0xfd/0x100 fs/ntfs/malloc.h:52
Code: 17 e8 87 f7 c4 fe 48 89 df be 42 0c 00 00 5b 41 5e 41 5f e9 c5 df 0d ff e8 70 f7 c4 fe 31 c0 5b 41 5e 41 5f c3 e8 63 f7 c4 fe <0f> 0b 90 66 0f 1f 00 55 41 57 41 56 41 55 41 54 53 49 89 fe 49 bc
RSP: 0018:ffffc90027107818 EFLAGS: 00010283
RAX: ffffffff82c7a8ad RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000ce23000 RSI: 0000000000005237 RDI: 0000000000005238
RBP: ffff88803a9e44a0 R08: ffffffff82c7a7dd R09: ffffed10105f8a5b
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888082fc55a0 R14: ffff88803a9e44ab R15: dffffc0000000000
FS:  00007f447fd87700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54efde5000 CR3: 000000002a9b8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ntfs_read_locked_inode+0x1fd5/0x49c0 fs/ntfs/inode.c:703
 ntfs_iget+0x113/0x190 fs/ntfs/inode.c:177
 load_and_init_mft_mirror fs/ntfs/super.c:1027 [inline]
 load_system_files+0x100/0x4840 fs/ntfs/super.c:1772
 ntfs_fill_super+0x19b4/0x2bd0 fs/ntfs/super.c:2892
 mount_bdev+0x271/0x3a0 fs/super.c:1371
 legacy_get_tree+0xef/0x190 fs/fs_context.c:610
 vfs_get_tree+0x8c/0x270 fs/super.c:1501
 do_new_mount+0x28f/0xae0 fs/namespace.c:3031
 do_mount fs/namespace.c:3374 [inline]
 __do_sys_mount fs/namespace.c:3583 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3560
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f447f08d62a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f447fd86f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000001e70f RCX: 00007f447f08d62a
RDX: 0000000020000080 RSI: 0000000020000000 RDI: 00007f447fd86fe0
RBP: 00007f447fd87020 R08: 00007f447fd87020 R09: 0000000000000005
R10: 0000000000000005 R11: 0000000000000202 R12: 0000000020000080
R13: 0000000020000000 R14: 00007f447fd86fe0 R15: 0000000020001400
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ntfs_malloc fs/ntfs/malloc.h:31 [inline]
RIP: 0010:ntfs_malloc_nofs+0xfd/0x100 fs/ntfs/malloc.h:52
Code: 17 e8 87 f7 c4 fe 48 89 df be 42 0c 00 00 5b 41 5e 41 5f e9 c5 df 0d ff e8 70 f7 c4 fe 31 c0 5b 41 5e 41 5f c3 e8 63 f7 c4 fe <0f> 0b 90 66 0f 1f 00 55 41 57 41 56 41 55 41 54 53 49 89 fe 49 bc
RSP: 0018:ffffc90027107818 EFLAGS: 00010283

RAX: ffffffff82c7a8ad RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000ce23000 RSI: 0000000000005237 RDI: 0000000000005238
RBP: ffff88803a9e44a0 R08: ffffffff82c7a7dd R09: ffffed10105f8a5b
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888082fc55a0 R14: ffff88803a9e44ab R15: dffffc0000000000
FS:  00007f447fd87700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcdee130000 CR3: 000000002a9b8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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