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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 431c1646e1f8 Linux 6.11-rc6 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10f3370b980000 kernel config: https://syzkaller.appspot.com/x/.config?x=660f6eb11f9c7dc5 dashboard link: https://syzkaller.appspot.com/bug?extid=3bfd2cc059ab93efcdb4 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16b809eb980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1495c40d980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8f73ff24e19d/disk-431c1646.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a9cc8629dafc/vmlinux-431c1646.xz kernel image: https://storage.googleapis.com/syzbot-assets/01c91ce5203b/bzImage-431c1646.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/9687e33b346d/mount_0.gz The issue was bisected to: commit 110b24eb1a749bea3440f3ca2ff890a26179050a Author: Konstantin Komarov Date: Wed Apr 17 07:33:06 2024 +0000 fs/ntfs3: Taking DOS names into account during link counting bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13aefeb7980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=106efeb7980000 console output: https://syzkaller.appspot.com/x/log.txt?x=17aefeb7980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3bfd2cc059ab93efcdb4@syzkaller.appspotmail.com Fixes: 110b24eb1a74 ("fs/ntfs3: Taking DOS names into account during link counting") loop0: detected capacity change from 0 to 8192 ntfs3: loop0: Different NTFS sector size (4096) and media sector size (512). INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 0 UID: 0 PID: 5231 Comm: syz-executor253 Not tainted 6.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 assign_lock_key+0x238/0x270 kernel/locking/lockdep.c:975 register_lock_class+0x1cf/0x980 kernel/locking/lockdep.c:1288 __lock_acquire+0xf0/0x2040 kernel/locking/lockdep.c:5019 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_write_nested+0xa2/0x220 kernel/locking/rwsem.c:1695 mark_as_free_ex+0x3e/0x390 fs/ntfs3/fsntfs.c:2484 run_unpack+0x7f3/0xda0 fs/ntfs3/run.c:1019 run_unpack_ex+0x14b/0x7f0 fs/ntfs3/run.c:1060 ni_delete_all+0x2d9/0x9a0 fs/ntfs3/frecord.c:1610 ni_clear+0x28e/0x4b0 fs/ntfs3/frecord.c:106 evict+0x534/0x950 fs/inode.c:704 ntfs_loadlog_and_replay+0x2e8/0x4f0 fs/ntfs3/fsntfs.c:326 ntfs_fill_super+0x2c38/0x4730 fs/ntfs3/super.c:1280 get_tree_bdev+0x3f9/0x570 fs/super.c:1635 vfs_get_tree+0x92/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3f008c4daa Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffda8f23918 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffda8f23930 RCX: 00007f3f008c4daa RDX: 0000000020020b80 RSI: 0000000020020bc0 RDI: 00007ffda8f23930 RBP: 0000000000000004 R08: 00007ffda8f23970 R09: 0000000000020b83 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000 R13: 00007ffda8f23970 R14: 0000000000000003 R15: 0000000000400000 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 UID: 0 PID: 5231 Comm: syz-executor253 Not tainted 6.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:wnd_is_used+0x58/0x520 fs/ntfs3/bitmap.c:928 Code: 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 a0 11 13 ff 49 8b 1f 48 8d 6b 14 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 7b 04 00 00 0f b6 6d 00 4c 8d 75 03 bf 3d RSP: 0018:ffffc90009257288 EFLAGS: 00010213 RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88802ebf41f8 RBP: 0000000000000014 R08: ffff88802ebf420f R09: 1ffff11005d7e841 R10: dffffc0000000000 R11: ffffed1005d7e842 R12: 0000000000000003 R13: 0000000000000002 R14: 0000000000000002 R15: ffff88802ebf41f8 FS: 000055556c297380(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20b8995ed8 CR3: 000000007757a000 CR4: 0000000000350ef0 Call Trace: mark_as_free_ex+0x53/0x390 fs/ntfs3/fsntfs.c:2485 run_unpack+0x7f3/0xda0 fs/ntfs3/run.c:1019 run_unpack_ex+0x14b/0x7f0 fs/ntfs3/run.c:1060 ni_delete_all+0x2d9/0x9a0 fs/ntfs3/frecord.c:1610 ni_clear+0x28e/0x4b0 fs/ntfs3/frecord.c:106 evict+0x534/0x950 fs/inode.c:704 ntfs_loadlog_and_replay+0x2e8/0x4f0 fs/ntfs3/fsntfs.c:326 ntfs_fill_super+0x2c38/0x4730 fs/ntfs3/super.c:1280 get_tree_bdev+0x3f9/0x570 fs/super.c:1635 vfs_get_tree+0x92/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3f008c4daa Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffda8f23918 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffda8f23930 RCX: 00007f3f008c4daa RDX: 0000000020020b80 RSI: 0000000020020bc0 RDI: 00007ffda8f23930 RBP: 0000000000000004 R08: 00007ffda8f23970 R09: 0000000000020b83 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000 R13: 00007ffda8f23970 R14: 0000000000000003 R15: 0000000000400000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:wnd_is_used+0x58/0x520 fs/ntfs3/bitmap.c:928 Code: 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 a0 11 13 ff 49 8b 1f 48 8d 6b 14 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 7b 04 00 00 0f b6 6d 00 4c 8d 75 03 bf 3d RSP: 0018:ffffc90009257288 EFLAGS: 00010213 RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88802ebf41f8 RBP: 0000000000000014 R08: ffff88802ebf420f R09: 1ffff11005d7e841 R10: dffffc0000000000 R11: ffffed1005d7e842 R12: 0000000000000003 R13: 0000000000000002 R14: 0000000000000002 R15: ffff88802ebf41f8 FS: 000055556c297380(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20b8995ed8 CR3: 000000007757a000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 8: 74 08 je 0x12 a: 4c 89 ff mov %r15,%rdi d: e8 a0 11 13 ff call 0xff1311b2 12: 49 8b 1f mov (%r15),%rbx 15: 48 8d 6b 14 lea 0x14(%rbx),%rbp 19: 48 89 e8 mov %rbp,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 7b 04 00 00 jne 0x4b1 36: 0f b6 6d 00 movzbl 0x0(%rbp),%ebp 3a: 4c 8d 75 03 lea 0x3(%rbp),%r14 3e: bf .byte 0xbf 3f: 3d .byte 0x3d --- This report is generated by a bot. 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