Message-ID: <688ce1d3.a00a0220.26d0e1.0072.GAE@google.com>
Date: Fri, 01 Aug 2025 08:48:35 -0700
From: syzbot <syzbot+117f64a14c2a41e45fae@...kaller.appspotmail.com>
To: almaz.alexandrovich@...agon-software.com, linux-kernel@...r.kernel.org, 
	ntfs3@...ts.linux.dev, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [ntfs3?] general protection fault in inode_insert5

Hello,

syzbot found the following issue on:

HEAD commit:    260f6f4fda93 Merge tag 'drm-next-2025-07-30' of https://gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=141d2f82580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bb7581d3fb1bb0d7
dashboard link: https://syzkaller.appspot.com/bug?extid=117f64a14c2a41e45fae
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=125ad9bc580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1fce1d4d56ce/disk-260f6f4f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/01688cdba884/vmlinux-260f6f4f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/eba9b2f77e6a/bzImage-260f6f4f.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/55f62cc62791/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+117f64a14c2a41e45fae@...kaller.appspotmail.com

loop1: detected capacity change from 0 to 4096
BUG: unable to handle page fault for address: ffffffffffffff81
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD d5ab067 P4D d5ab067 PUD d5ad067 PMD 0 
Oops: Oops: 0002 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 7587 Comm: syz.1.738 Tainted: G        W           6.16.0-syzkaller-08685-g260f6f4fda93 #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:spin_lock include/linux/spinlock_rt.h:44 [inline]
RIP: 0010:inode_sb_list_add fs/inode.c:628 [inline]
RIP: 0010:inode_insert5+0x2c6/0x4d0 fs/inode.c:1322
Code: f7 00 00 00 48 8b 44 24 10 80 3c 28 00 74 08 48 89 df e8 2d bd ec ff 4c 8b 23 49 8d bc 24 40 0b 00 00 48 89 3c 24 e8 29 b3 c0 <08> 49 81 c4 c0 0b 00 00 4c 89 e3 48 c1 eb 03 80 3c 2b 00 74 08 4c
RSP: 0018:ffffc900084cf628 EFLAGS: 00010246
RAX: 698bb2b8262d1d00 RBX: ffff88805a41eed8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b61e260 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8af10c9b
R10: dffffc0000000000 R11: fffffbfff1df4787 R12: ffff88814bc80000
R13: ffff88805a41f060 R14: ffff88805a41f0a0 R15: 1ffff1100b483e14
FS:  00007f159f40e6c0(0000) GS:ffff888126c1e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff81 CR3: 00000000113c0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 iget5_locked+0x66/0xa0 fs/inode.c:1358
 ntfs_iget5+0xc1/0x37c0 fs/ntfs3/inode.c:533
 ntfs_fill_super+0x3927/0x40b0 fs/ntfs3/super.c:1519
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4321
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f15a01a030a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f159f40de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f159f40def0 RCX: 00007f15a01a030a
RDX: 0000200000000080 RSI: 000020000001f740 RDI: 00007f159f40deb0
RBP: 0000200000000080 R08: 00007f159f40def0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000020000001f740
R13: 00007f159f40deb0 R14: 000000000001f771 R15: 0000200000000100
 </TASK>
Modules linked in:
CR2: ffffffffffffff81
---[ end trace 0000000000000000 ]---
RIP: 0010:spin_lock include/linux/spinlock_rt.h:44 [inline]
RIP: 0010:inode_sb_list_add fs/inode.c:628 [inline]
RIP: 0010:inode_insert5+0x2c6/0x4d0 fs/inode.c:1322
Code: f7 00 00 00 48 8b 44 24 10 80 3c 28 00 74 08 48 89 df e8 2d bd ec ff 4c 8b 23 49 8d bc 24 40 0b 00 00 48 89 3c 24 e8 29 b3 c0 <08> 49 81 c4 c0 0b 00 00 4c 89 e3 48 c1 eb 03 80 3c 2b 00 74 08 4c
RSP: 0018:ffffc900084cf628 EFLAGS: 00010246
RAX: 698bb2b8262d1d00 RBX: ffff88805a41eed8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b61e260 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8af10c9b
R10: dffffc0000000000 R11: fffffbfff1df4787 R12: ffff88814bc80000
R13: ffff88805a41f060 R14: ffff88805a41f0a0 R15: 1ffff1100b483e14
FS:  00007f159f40e6c0(0000) GS:ffff888126c1e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff81 CR3: 00000000113c0000 CR4: 00000000003526f0


---
This report is generated by a bot. It may contain errors.
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If the report is already addressed, let syzbot know by replying with:
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