loop1: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected 6.1.91-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/4705 is trying to acquire lock: ffff888056455220 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1099 [inline] ffff888056455220 (&ni->ni_lock/4){+.+.}-{3:3}, at: attr_data_get_block+0x429/0x2520 fs/ntfs3/attrib.c:921 but task is already holding lock: ffff888021597958 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] ffff888021597958 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x175/0x2d0 mm/util.c:518 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __might_fault+0xbd/0x110 mm/memory.c:5835 _copy_to_user+0x26/0x130 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144 ni_fiemap+0x1007/0x1230 fs/ntfs3/frecord.c:1949 ntfs_fiemap+0x12e/0x170 fs/ntfs3/file.c:1247 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ni->ni_lock/4){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1099 [inline] attr_data_get_block+0x429/0x2520 fs/ntfs3/attrib.c:921 ntfs_get_block_vbo+0x373/0xe60 fs/ntfs3/inode.c:590 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x98/0x1f0 fs/buffer.c:2102 ntfs_extend_initialized_size+0x3c5/0x890 fs/ntfs3/file.c:159 ntfs_file_mmap+0x5a4/0x7e0 fs/ntfs3/file.c:403 call_mmap include/linux/fs.h:2270 [inline] mmap_region+0xf96/0x1fa0 mm/mmap.c:2763 do_mmap+0x8c5/0xf60 mm/mmap.c:1425 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520 ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1471 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&ni->ni_lock/4); lock(&mm->mmap_lock); lock(&ni->ni_lock/4); *** DEADLOCK *** 2 locks held by syz-executor.1/4705: #0: ffff888021597958 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] #0: ffff888021597958 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x175/0x2d0 mm/util.c:518 #1: ffff8880564554c0 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:778 [inline] #1: ffff8880564554c0 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: ntfs_file_mmap+0x56b/0x7e0 fs/ntfs3/file.c:399 stack backtrace: CPU: 0 PID: 4705 Comm: syz-executor.1 Not tainted 6.1.91-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747 ni_lock fs/ntfs3/ntfs_fs.h:1099 [inline] attr_data_get_block+0x429/0x2520 fs/ntfs3/attrib.c:921 ntfs_get_block_vbo+0x373/0xe60 fs/ntfs3/inode.c:590 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x98/0x1f0 fs/buffer.c:2102 ntfs_extend_initialized_size+0x3c5/0x890 fs/ntfs3/file.c:159 ntfs_file_mmap+0x5a4/0x7e0 fs/ntfs3/file.c:403 call_mmap include/linux/fs.h:2270 [inline] mmap_region+0xf96/0x1fa0 mm/mmap.c:2763 do_mmap+0x8c5/0xf60 mm/mmap.c:1425 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520 ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1471 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7faee787cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faee865b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007faee79abf80 RCX: 00007faee787cee9 RDX: 8088e3ad122bc19a RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007faee78c949e R08: 0000000000000004 R09: 0000000085375000 R10: 0000000004002011 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007faee79abf80 R15: 00007fff7a4de3e8