====================================================== WARNING: possible circular locking dependency detected 5.15.179-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.1786/10325 is trying to acquire lock: ffff0000f1d99260 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] ffff0000f1d99260 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: ntfs_file_mmap+0x4b0/0x688 fs/ntfs3/file.c:401 but task is already holding lock: ffff0000d42362d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] ffff0000d42362d8 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x15c/0x2b4 mm/util.c:549 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc8/0x128 mm/memory.c:5357 fault_in_readable+0xdc/0x56c mm/gup.c:1793 fault_in_iov_iter_readable+0x130/0x1b0 lib/iov_iter.c:460 generic_perform_write+0x198/0x520 mm/filemap.c:3775 __generic_file_write_iter+0x230/0x454 mm/filemap.c:3912 ntfs_file_write_iter+0x40c/0x49c fs/ntfs3/file.c:1143 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x884/0xb44 fs/read_write.c:594 ksys_write+0x15c/0x26c fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:787 [inline] ntfs_file_mmap+0x4b0/0x688 fs/ntfs3/file.c:401 call_mmap include/linux/fs.h:2177 [inline] mmap_file+0x6c/0xc8 mm/util.c:1092 __mmap_region mm/mmap.c:1784 [inline] mmap_region+0xb24/0x1408 mm/mmap.c:2921 do_mmap+0x698/0xdc4 mm/mmap.c:1574 vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:551 ksys_mmap_pgoff+0x458/0x668 mm/mmap.c:1623 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#30); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#30); *** DEADLOCK *** 1 lock held by syz.0.1786/10325: #0: ffff0000d42362d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] #0: ffff0000d42362d8 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x15c/0x2b4 mm/util.c:549 stack backtrace: CPU: 0 PID: 10325 Comm: syz.0.1786 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:787 [inline] ntfs_file_mmap+0x4b0/0x688 fs/ntfs3/file.c:401 call_mmap include/linux/fs.h:2177 [inline] mmap_file+0x6c/0xc8 mm/util.c:1092 __mmap_region mm/mmap.c:1784 [inline] mmap_region+0xb24/0x1408 mm/mmap.c:2921 do_mmap+0x698/0xdc4 mm/mmap.c:1574 vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:551 ksys_mmap_pgoff+0x458/0x668 mm/mmap.c:1623 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 10325 at fs/ntfs3/file.c:112 ntfs_extend_initialized_size+0x738/0x760 fs/ntfs3/file.c:112 Modules linked in: CPU: 1 PID: 10325 Comm: syz.0.1786 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ntfs_extend_initialized_size+0x738/0x760 fs/ntfs3/file.c:112 lr : ntfs_extend_initialized_size+0x738/0x760 fs/ntfs3/file.c:112 sp : ffff8000208176e0 x29: ffff800020817800 x28: ffff8000208177a0 x27: ffff800020817780 x26: ffff0000f1d98fe8 x25: ffff0000db3f8000 x24: 0000000000000221 x23: ffff0000f1d99338 x22: ffff800020817760 x21: dfff800000000000 x20: 00000000000c0000 x19: 0000000000070000 x18: 0000000000000001 x17: 0000000000000000 x16: ffff80000824f3a0 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000c9571b40 x8 : ffff800009657240 x7 : 0000000000000000 x6 : ffff8000082e6b60 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000070000 x2 : 00000000000c0000 x1 : 0000000000070000 x0 : 00000000000c0000 Call trace: ntfs_extend_initialized_size+0x738/0x760 fs/ntfs3/file.c:112 ntfs_file_mmap+0x4d8/0x688 fs/ntfs3/file.c:402 call_mmap include/linux/fs.h:2177 [inline] mmap_file+0x6c/0xc8 mm/util.c:1092 __mmap_region mm/mmap.c:1784 [inline] mmap_region+0xb24/0x1408 mm/mmap.c:2921 do_mmap+0x698/0xdc4 mm/mmap.c:1574 vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:551 ksys_mmap_pgoff+0x458/0x668 mm/mmap.c:1623 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 777 hardirqs last enabled at (777): [] lock_page_memcg+0x11c/0x244 mm/memcontrol.c:2061 hardirqs last disabled at (776): [] lock_page_memcg+0x1a8/0x244 mm/memcontrol.c:2059 softirqs last enabled at (94): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (92): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace b52b922e19b9cf44 ]--- ntfs3: loop0: ino=21, "file1" failed to extend initialized size to 70000.