====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.362/5948 is trying to acquire lock: ffff0000e22a8860 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1103 [inline] ffff0000e22a8860 (&ni->ni_lock#2/5){+.+.}-{3:3}, at: attr_data_get_block+0x210/0x14fc fs/ntfs3/attrib.c:953 but task is already holding lock: ffff0000e22a8ca0 (mapping.invalidate_lock#5){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] ffff0000e22a8ca0 (mapping.invalidate_lock#5){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x574 mm/readahead.c:226 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (mapping.invalidate_lock#5){.+.+}-{3:3}: down_read+0x64/0x300 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] filemap_fault+0x374/0xe98 mm/filemap.c:3247 __do_fault+0x11c/0x3d8 mm/memory.c:4278 do_read_fault mm/memory.c:4629 [inline] do_fault mm/memory.c:4758 [inline] handle_pte_fault mm/memory.c:5029 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x1cac/0x2fb0 mm/memory.c:5292 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x33c/0x754 mm/gup.c:1250 populate_vma_page_range+0x1f4/0x298 mm/gup.c:1607 __mm_populate+0x210/0x334 mm/gup.c:1721 mm_populate include/linux/mm.h:2891 [inline] vm_mmap_pgoff+0x1d8/0x294 mm/util.c:525 ksys_mmap_pgoff+0x3b8/0x5a0 mm/mmap.c:1482 __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+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #1 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc4/0x124 mm/memory.c:5850 _copy_to_user include/linux/uaccess.h:143 [inline] copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x16c/0x3d8 fs/ioctl.c:144 ni_fiemap+0x338/0x1094 fs/ntfs3/frecord.c:1996 ntfs_fiemap+0xe4/0x140 fs/ntfs3/file.c:1177 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1710/0x2100 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (&ni->ni_lock#2/5){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x1f60 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 ni_lock fs/ntfs3/ntfs_fs.h:1103 [inline] attr_data_get_block+0x210/0x14fc fs/ntfs3/attrib.c:953 ntfs_get_block_vbo+0x358/0xb70 fs/ntfs3/inode.c:597 ntfs_get_block+0x84/0xc4 fs/ntfs3/inode.c:691 do_mpage_readpage+0x5dc/0x16b0 fs/mpage.c:208 mpage_readahead+0x324/0x5c0 fs/mpage.c:361 ntfs_readahead+0x1a8/0x1f8 fs/ntfs3/inode.c:764 read_pages+0x158/0x680 mm/readahead.c:161 page_cache_ra_unbounded+0x134/0x574 mm/readahead.c:242 do_page_cache_ra mm/readahead.c:300 [inline] page_cache_ra_order+0x84c/0xa14 mm/readahead.c:564 ondemand_readahead+0x600/0xb0c mm/readahead.c:690 page_cache_sync_ra+0x350/0x3d0 mm/readahead.c:717 page_cache_sync_readahead include/linux/pagemap.h:1250 [inline] filemap_get_pages mm/filemap.c:2665 [inline] filemap_read+0x4c4/0x2104 mm/filemap.c:2759 generic_file_read_iter+0xf8/0x5c4 mm/filemap.c:2941 ntfs_file_read_iter+0x184/0x1e0 fs/ntfs3/file.c:771 call_read_iter include/linux/fs.h:2259 [inline] generic_file_splice_read+0x180/0x444 fs/splice.c:308 do_splice_to fs/splice.c:803 [inline] splice_direct_to_actor+0x2ec/0x954 fs/splice.c:875 do_splice_direct+0x168/0x25c fs/splice.c:1002 do_sendfile+0x478/0xcc8 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __arm64_sys_sendfile64+0x134/0x36c fs/read_write.c:1309 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 other info that might help us debug this: Chain exists of: &ni->ni_lock#2/5 --> &mm->mmap_lock --> mapping.invalidate_lock#5 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#5); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#5); lock(&ni->ni_lock#2/5); *** DEADLOCK *** 2 locks held by syz.2.362/5948: #0: ffff0000de824460 (sb_writers#22){.+.+}-{0:0}, at: do_sendfile+0x45c/0xcc8 fs/read_write.c:1254 #1: ffff0000e22a8ca0 (mapping.invalidate_lock#5){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] #1: ffff0000e22a8ca0 (mapping.invalidate_lock#5){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x574 mm/readahead.c:226 stack backtrace: CPU: 0 PID: 5948 Comm: syz.2.362 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 Call trace: dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048 check_noncircular+0x264/0x2f8 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 kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x1f60 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 ni_lock fs/ntfs3/ntfs_fs.h:1103 [inline] attr_data_get_block+0x210/0x14fc fs/ntfs3/attrib.c:953 ntfs_get_block_vbo+0x358/0xb70 fs/ntfs3/inode.c:597 ntfs_get_block+0x84/0xc4 fs/ntfs3/inode.c:691 do_mpage_readpage+0x5dc/0x16b0 fs/mpage.c:208 mpage_readahead+0x324/0x5c0 fs/mpage.c:361 ntfs_readahead+0x1a8/0x1f8 fs/ntfs3/inode.c:764 read_pages+0x158/0x680 mm/readahead.c:161 page_cache_ra_unbounded+0x134/0x574 mm/readahead.c:242 do_page_cache_ra mm/readahead.c:300 [inline] page_cache_ra_order+0x84c/0xa14 mm/readahead.c:564 ondemand_readahead+0x600/0xb0c mm/readahead.c:690 page_cache_sync_ra+0x350/0x3d0 mm/readahead.c:717 page_cache_sync_readahead include/linux/pagemap.h:1250 [inline] filemap_get_pages mm/filemap.c:2665 [inline] filemap_read+0x4c4/0x2104 mm/filemap.c:2759 generic_file_read_iter+0xf8/0x5c4 mm/filemap.c:2941 ntfs_file_read_iter+0x184/0x1e0 fs/ntfs3/file.c:771 call_read_iter include/linux/fs.h:2259 [inline] generic_file_splice_read+0x180/0x444 fs/splice.c:308 do_splice_to fs/splice.c:803 [inline] splice_direct_to_actor+0x2ec/0x954 fs/splice.c:875 do_splice_direct+0x168/0x25c fs/splice.c:1002 do_sendfile+0x478/0xcc8 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __arm64_sys_sendfile64+0x134/0x36c fs/read_write.c:1309 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585