====================================================== WARNING: possible circular locking dependency detected 6.1.71-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/26702 is trying to acquire lock: ffff888076e59058 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xa1/0x110 mm/memory.c:5811 but task is already holding lock: ffff88808c3e1f30 (&ni->file.run_lock#3){++++}-{3:3}, at: ni_fiemap+0x5da/0x1230 fs/ntfs3/frecord.c:1985 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ni->file.run_lock#3){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_read+0xad/0xa30 kernel/locking/rwsem.c:1520 attr_data_get_block+0x276/0x2520 fs/ntfs3/attrib.c:903 ntfs_get_block_vbo+0x373/0xe60 fs/ntfs3/inode.c:590 do_mpage_readpage+0x8d2/0x2040 fs/mpage.c:208 mpage_readahead+0x450/0x920 fs/mpage.c:361 read_pages+0x17f/0x830 mm/readahead.c:161 page_cache_ra_unbounded+0x68b/0x7b0 mm/readahead.c:270 page_cache_sync_readahead include/linux/pagemap.h:1215 [inline] filemap_get_pages mm/filemap.c:2636 [inline] filemap_read+0x7fa/0x31d0 mm/filemap.c:2730 call_read_iter include/linux/fs.h:2242 [inline] generic_file_splice_read+0x23c/0x630 fs/splice.c:309 do_splice_to fs/splice.c:793 [inline] splice_direct_to_actor+0x408/0xbd0 fs/splice.c:865 do_splice_direct+0x27f/0x3c0 fs/splice.c:974 do_sendfile+0x61c/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (mapping.invalidate_lock#4){++++}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 down_read+0xad/0xa30 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] filemap_fault+0x640/0x17e0 mm/filemap.c:3191 __do_fault+0x136/0x4f0 mm/memory.c:4241 do_shared_fault mm/memory.c:4647 [inline] do_fault mm/memory.c:4725 [inline] handle_pte_fault mm/memory.c:4993 [inline] __handle_mm_fault mm/memory.c:5135 [inline] handle_mm_fault+0x2243/0x5340 mm/memory.c:5256 do_user_addr_fault arch/x86/mm/fault.c:1380 [inline] handle_page_fault arch/x86/mm/fault.c:1471 [inline] exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:165 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] copyout lib/iov_iter.c:170 [inline] _copy_to_iter+0x2c2/0x1000 lib/iov_iter.c:527 copy_page_to_iter+0xac/0x170 lib/iov_iter.c:725 copy_folio_to_iter include/linux/uio.h:172 [inline] filemap_read+0x273e/0x31d0 mm/filemap.c:2790 call_read_iter include/linux/fs.h:2242 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7de/0xbe0 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+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #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 __might_fault+0xbd/0x110 mm/memory.c:5811 _copy_to_user+0x26/0x130 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144 ni_fiemap+0xa5a/0x1230 fs/ntfs3/frecord.c:2066 ntfs_fiemap+0x12e/0x170 fs/ntfs3/file.c:1245 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &mm->mmap_lock --> mapping.invalidate_lock#4 --> &ni->file.run_lock#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->file.run_lock#3); lock(mapping.invalidate_lock#4); lock(&ni->file.run_lock#3); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz-executor.2/26702: #0: ffff88808c3e1e80 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline] #0: ffff88808c3e1e80 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_fiemap+0xfb/0x170 fs/ntfs3/file.c:1243 #1: ffff88808c3e1f30 (&ni->file.run_lock#3){++++}-{3:3}, at: ni_fiemap+0x5da/0x1230 fs/ntfs3/frecord.c:1985 stack backtrace: CPU: 0 PID: 26702 Comm: syz-executor.2 Not tainted 6.1.71-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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 __might_fault+0xbd/0x110 mm/memory.c:5811 _copy_to_user+0x26/0x130 lib/usercopy.c:36 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144 ni_fiemap+0xa5a/0x1230 fs/ntfs3/frecord.c:2066 ntfs_fiemap+0x12e/0x170 fs/ntfs3/file.c:1245 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd4e067cd29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd4e14b90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd4e07ac050 RCX: 00007fd4e067cd29 RDX: 00000000200000c0 RSI: 00000000c020660b RDI: 0000000000000008 RBP: 00007fd4e06c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fd4e07ac050 R15: 00007fff77bd29f8