====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc2-syzkaller-g2e7aff49b5da #0 Not tainted ------------------------------------------------------ syz.4.94/6932 is trying to acquire lock: ffff0000d8b74c10 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0x9c/0x124 mm/memory.c:6750 but task is already holding lock: ffff0000dc8f8858 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1110 [inline] ffff0000dc8f8858 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fiemap+0xec/0x168 fs/ntfs3/file.c:1358 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->ni_lock#3/5){+.+.}-{4:4}: __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 ni_lock fs/ntfs3/ntfs_fs.h:1110 [inline] attr_data_get_block+0x340/0x23cc fs/ntfs3/attrib.c:917 ntfs_file_mmap+0x3dc/0x6b8 fs/ntfs3/file.c:371 call_mmap include/linux/fs.h:2183 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2291 [inline] __mmap_new_vma mm/vma.c:2355 [inline] __mmap_region+0x1854/0x2180 mm/vma.c:2456 mmap_region+0x1cc/0x370 mm/mmap.c:1348 do_mmap+0x8b0/0xfd0 mm/mmap.c:496 vm_mmap_pgoff+0x1a0/0x38c mm/util.c:580 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:542 __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:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&mm->mmap_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 __might_fault+0xc4/0x124 mm/memory.c:6751 _inline_copy_to_user include/linux/uaccess.h:192 [inline] copy_to_user include/linux/uaccess.h:223 [inline] fiemap_fill_next_extent+0x1b4/0x424 fs/ioctl.c:145 ni_fiemap+0x7c0/0xe14 fs/ntfs3/frecord.c:2059 ntfs_fiemap+0x110/0x168 fs/ntfs3/file.c:1360 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1de8/0x2aa8 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0xe4/0x1cc fs/ioctl.c:892 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->ni_lock#3/5); lock(&mm->mmap_lock); lock(&ni->ni_lock#3/5); rlock(&mm->mmap_lock); *** DEADLOCK *** 1 lock held by syz.4.94/6932: #0: ffff0000dc8f8858 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1110 [inline] #0: ffff0000dc8f8858 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_fiemap+0xec/0x168 fs/ntfs3/file.c:1358 stack backtrace: CPU: 0 UID: 0 PID: 6932 Comm: syz.4.94 Not tainted 6.13.0-rc2-syzkaller-g2e7aff49b5da #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2074 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 __might_fault+0xc4/0x124 mm/memory.c:6751 _inline_copy_to_user include/linux/uaccess.h:192 [inline] copy_to_user include/linux/uaccess.h:223 [inline] fiemap_fill_next_extent+0x1b4/0x424 fs/ioctl.c:145 ni_fiemap+0x7c0/0xe14 fs/ntfs3/frecord.c:2059 ntfs_fiemap+0x110/0x168 fs/ntfs3/file.c:1360 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1de8/0x2aa8 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0xe4/0x1cc fs/ioctl.c:892 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600