====================================================== WARNING: possible circular locking dependency detected 6.1.121-syzkaller #0 Tainted: G W ------------------------------------------------------ syz.1.411/5889 is trying to acquire lock: ffff88801f6c44d8 (&mm->mmap_lock){++++}-{3:3}, at: internal_get_user_pages_fast+0x20b/0x2cf0 mm/gup.c:3031 but task is already holding lock: ffff88807232bea0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:778 [inline] ffff88807232bea0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_file_write_iter+0x1c7/0x6d0 fs/ntfs3/file.c:1144 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ntfs_file_mmap+0x583/0x7d0 fs/ntfs3/file.c:399 call_mmap include/linux/fs.h:2270 [inline] mmap_file+0x5a/0xa0 mm/util.c:1109 __mmap_region mm/mmap.c:2760 [inline] mmap_region+0x10b3/0x2660 mm/mmap.c:2904 do_mmap+0x8c5/0xf60 mm/mmap.c:1424 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520 ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1470 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 (&mm->mmap_lock){++++}-{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 internal_get_user_pages_fast+0x224/0x2cf0 mm/gup.c:3031 __iov_iter_get_pages_alloc+0x3b1/0xa70 lib/iov_iter.c:1460 iov_iter_get_pages2+0xcb/0x120 lib/iov_iter.c:1503 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:215 [inline] do_direct_IO fs/direct-io.c:932 [inline] __blockdev_direct_IO+0x13d6/0x4810 fs/direct-io.c:1266 blockdev_direct_IO include/linux/fs.h:3342 [inline] ntfs_direct_IO+0x193/0x360 fs/ntfs3/inode.c:800 generic_file_direct_write+0x204/0x460 mm/filemap.c:3769 __generic_file_write_iter+0x1c4/0x400 mm/filemap.c:3929 ntfs_file_write_iter+0x5fa/0x6d0 fs/ntfs3/file.c:1165 do_iter_write+0x6e6/0xc40 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_writev+0x27b/0x460 fs/read_write.c:977 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(&sb->s_type->i_mutex_key#21); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#21); lock(&mm->mmap_lock); *** DEADLOCK *** 3 locks held by syz.1.411/5889: #0: ffff8880798894e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2ba/0x360 fs/file.c:1031 #1: ffff88807b5ea460 (sb_writers#13){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:933 [inline] #1: ffff88807b5ea460 (sb_writers#13){.+.+}-{0:0}, at: do_writev+0x267/0x460 fs/read_write.c:977 #2: ffff88807232bea0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:778 [inline] #2: ffff88807232bea0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ntfs_file_write_iter+0x1c7/0x6d0 fs/ntfs3/file.c:1144 stack backtrace: CPU: 1 PID: 5889 Comm: syz.1.411 Tainted: G W 6.1.121-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 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 internal_get_user_pages_fast+0x224/0x2cf0 mm/gup.c:3031 __iov_iter_get_pages_alloc+0x3b1/0xa70 lib/iov_iter.c:1460 iov_iter_get_pages2+0xcb/0x120 lib/iov_iter.c:1503 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:215 [inline] do_direct_IO fs/direct-io.c:932 [inline] __blockdev_direct_IO+0x13d6/0x4810 fs/direct-io.c:1266 blockdev_direct_IO include/linux/fs.h:3342 [inline] ntfs_direct_IO+0x193/0x360 fs/ntfs3/inode.c:800 generic_file_direct_write+0x204/0x460 mm/filemap.c:3769 __generic_file_write_iter+0x1c4/0x400 mm/filemap.c:3929 ntfs_file_write_iter+0x5fa/0x6d0 fs/ntfs3/file.c:1165 do_iter_write+0x6e6/0xc40 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_writev+0x27b/0x460 fs/read_write.c:977 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: 0033:0x7f3dc9385d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3dca246038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f3dc9575fa0 RCX: 00007f3dc9385d29 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f3dc9401aa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3dc9575fa0 R15: 00007fff9e2161e8