loop2: detected capacity change from 0 to 4096 ntfs3: loop2: Different NTFS' sector size (2048) and media sector size (512) ntfs3: loop2: Mark volume as dirty due to NTFS errors ====================================================== WARNING: possible circular locking dependency detected 6.1.105-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.1604/8177 is trying to acquire lock: ffff88802935f958 (&mm->mmap_lock){++++}-{3:3}, at: internal_get_user_pages_fast+0x20b/0x2cf0 mm/gup.c:3031 but task is already holding lock: ffff88805827bea0 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff88805827bea0 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: __blockdev_direct_IO+0x390/0x4810 fs/direct-io.c:1162 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#31){+.+.}-{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_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 -> #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:3290 [inline] ntfs_direct_IO+0x193/0x360 fs/ntfs3/inode.c:796 generic_file_read_iter+0x333/0x540 mm/filemap.c:2862 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x88d/0xbf0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 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#31); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#31); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz.2.1604/8177: #0: ffff88802257b268 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2ba/0x360 fs/file.c:1062 #1: ffff88805827bea0 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff88805827bea0 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: __blockdev_direct_IO+0x390/0x4810 fs/direct-io.c:1162 stack backtrace: CPU: 1 PID: 8177 Comm: syz.2.1604 Not tainted 6.1.105-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 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:3290 [inline] ntfs_direct_IO+0x193/0x360 fs/ntfs3/inode.c:796 generic_file_read_iter+0x333/0x540 mm/filemap.c:2862 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x88d/0xbf0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 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: 0033:0x7f2b9e5799f9 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:00007f2b9f40f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f2b9e715f80 RCX: 00007f2b9e5799f9 RDX: 0000000000002000 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f2b9e5e78ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2b9e715f80 R15: 00007fffc0efaec8