====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.6.324/8623 is trying to acquire lock: ffff0000df2ab830 (mapping.invalidate_lock#7){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline] ffff0000df2ab830 (mapping.invalidate_lock#7){++++}-{4:4}, at: filemap_fault+0x448/0x1304 mm/filemap.c:3477 but task is already holding lock: ffff0000c2c64bd0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:368 [inline] ffff0000c2c64bd0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x154/0x330 mm/gup.c:1942 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xc4/0x124 mm/memory.c:7129 _inline_copy_to_user include/linux/uaccess.h:192 [inline] copy_to_user include/linux/uaccess.h:223 [inline] fiemap_fill_next_extent+0x17c/0x3f0 fs/ioctl.c:144 ni_fiemap+0x764/0x9ec fs/ntfs3/frecord.c:2007 ntfs_fiemap+0x10c/0x188 fs/ntfs3/file.c:1354 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1140/0x1834 fs/ioctl.c:531 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (&ni->ni_lock/5){+.+.}-{4:4}: __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline] ntfs_read_folio+0x140/0x1c0 fs/ntfs3/inode.c:737 filemap_read_folio+0xec/0x2f8 mm/filemap.c:2444 filemap_create_folio mm/filemap.c:2582 [inline] filemap_get_pages+0xa60/0x1ab0 mm/filemap.c:2644 filemap_splice_read+0x454/0xad8 mm/filemap.c:3027 ntfs_file_splice_read+0x158/0x1e0 fs/ntfs3/file.c:911 do_splice_read fs/splice.c:982 [inline] splice_direct_to_actor+0x364/0x994 fs/splice.c:1086 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x130/0x210 fs/splice.c:1230 do_sendfile+0x3cc/0x658 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __arm64_sys_sendfile64+0x1b4/0x274 fs/read_write.c:1417 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (mapping.invalidate_lock#7){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline] filemap_fault+0x448/0x1304 mm/filemap.c:3477 __do_fault+0x138/0x390 mm/memory.c:5281 do_read_fault mm/memory.c:5716 [inline] do_fault mm/memory.c:5850 [inline] do_pte_missing mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:6234 [inline] __handle_mm_fault+0x2738/0x4798 mm/memory.c:6366 handle_mm_fault+0x274/0x7fc mm/memory.c:6535 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1f4c/0x2d94 mm/gup.c:1428 populate_vma_page_range+0x258/0x348 mm/gup.c:1860 __mm_populate+0x208/0x330 mm/gup.c:1963 mm_populate include/linux/mm.h:3478 [inline] vm_mmap_pgoff+0x398/0x45c mm/util.c:586 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604 __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+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#7 --> &ni->ni_lock/5 --> &mm->mmap_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&ni->ni_lock/5); lock(&mm->mmap_lock); rlock(mapping.invalidate_lock#7); *** DEADLOCK *** 1 lock held by syz.6.324/8623: #0: ffff0000c2c64bd0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:368 [inline] #0: ffff0000c2c64bd0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x154/0x330 mm/gup.c:1942 stack backtrace: CPU: 1 UID: 0 PID: 8623 Comm: syz.6.324 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537 filemap_invalidate_lock_shared include/linux/fs.h:1045 [inline] filemap_fault+0x448/0x1304 mm/filemap.c:3477 __do_fault+0x138/0x390 mm/memory.c:5281 do_read_fault mm/memory.c:5716 [inline] do_fault mm/memory.c:5850 [inline] do_pte_missing mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:6234 [inline] __handle_mm_fault+0x2738/0x4798 mm/memory.c:6366 handle_mm_fault+0x274/0x7fc mm/memory.c:6535 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1f4c/0x2d94 mm/gup.c:1428 populate_vma_page_range+0x258/0x348 mm/gup.c:1860 __mm_populate+0x208/0x330 mm/gup.c:1963 mm_populate include/linux/mm.h:3478 [inline] vm_mmap_pgoff+0x398/0x45c mm/util.c:586 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604 __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+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596