====================================================== WARNING: possible circular locking dependency detected 6.1.111-syzkaller #0 Not tainted ------------------------------------------------------ syz.1.152/5151 is trying to acquire lock: ffff0000c432d548 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x9c/0x124 mm/memory.c:5850 but task is already holding lock: ffff0000e1284600 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:778 [inline] ffff0000e1284600 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: ntfs_file_write_iter+0x190/0x580 fs/ntfs3/file.c:1142 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}: down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ntfs_file_mmap+0x4b0/0x688 fs/ntfs3/file.c:399 call_mmap include/linux/fs.h:2270 [inline] mmap_region+0xdd0/0x1a98 mm/mmap.c:2763 do_mmap+0xa00/0x1108 mm/mmap.c:1425 vm_mmap_pgoff+0x1a4/0x2b4 mm/util.c:520 ksys_mmap_pgoff+0x3c8/0x5b0 mm/mmap.c:1471 __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+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 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 (&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 kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x3338/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __might_fault+0xc4/0x124 mm/memory.c:5851 fault_in_readable+0x188/0x5f0 mm/gup.c:1891 fault_in_iov_iter_readable+0x1a0/0x22c lib/iov_iter.c:370 generic_perform_write+0x1c8/0x55c mm/filemap.c:3807 __generic_file_write_iter+0x168/0x388 mm/filemap.c:3945 ntfs_file_write_iter+0x4d4/0x580 fs/ntfs3/file.c:1163 do_iter_write+0x534/0x964 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_pwritev+0x1ec/0x334 fs/read_write.c:1031 __do_sys_pwritev2 fs/read_write.c:1090 [inline] __se_sys_pwritev2 fs/read_write.c:1081 [inline] __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1081 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#23); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#23); lock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz.1.152/5151: #0: ffff0000da736460 (sb_writers#16){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:933 [inline] #0: ffff0000da736460 (sb_writers#16){.+.+}-{0:0}, at: do_pwritev+0x1d8/0x334 fs/read_write.c:1031 #1: ffff0000e1284600 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_trylock include/linux/fs.h:778 [inline] #1: ffff0000e1284600 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: ntfs_file_write_iter+0x190/0x580 fs/ntfs3/file.c:1142 stack backtrace: CPU: 1 PID: 5151 Comm: syz.1.152 Not tainted 6.1.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __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:2048 check_noncircular+0x2cc/0x378 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+0x3338/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __might_fault+0xc4/0x124 mm/memory.c:5851 fault_in_readable+0x188/0x5f0 mm/gup.c:1891 fault_in_iov_iter_readable+0x1a0/0x22c lib/iov_iter.c:370 generic_perform_write+0x1c8/0x55c mm/filemap.c:3807 __generic_file_write_iter+0x168/0x388 mm/filemap.c:3945 ntfs_file_write_iter+0x4d4/0x580 fs/ntfs3/file.c:1163 do_iter_write+0x534/0x964 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_pwritev+0x1ec/0x334 fs/read_write.c:1031 __do_sys_pwritev2 fs/read_write.c:1090 [inline] __se_sys_pwritev2 fs/read_write.c:1081 [inline] __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1081 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 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