====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc7-syzkaller-00067-g76b6905c11fd #0 Not tainted ------------------------------------------------------ syz-executor324/5416 is trying to acquire lock: ffff888013176fe0 (&mm->mmap_lock){++++}-{4:4}, at: gup_fast_fallback+0x246/0x29c0 mm/gup.c:3406 but task is already holding lock: ffff888048af6a68 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:897 [inline] ffff888048af6a68 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: ntfs_file_write_iter+0x294/0x7f0 fs/ntfs3/file.c:1240 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:877 [inline] ntfs_file_mmap+0x5bc/0x850 fs/ntfs3/file.c:379 call_mmap include/linux/fs.h:2245 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2296 [inline] __mmap_new_vma mm/vma.c:2360 [inline] __mmap_region mm/vma.c:2462 [inline] mmap_region+0x246d/0x2fc0 mm/vma.c:2540 do_mmap+0xecc/0x13a0 mm/mmap.c:561 vm_mmap_pgoff+0x2a0/0x530 mm/util.c:578 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:607 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&mm->mmap_lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 gup_fast_fallback+0x25f/0x29c0 mm/gup.c:3406 pin_user_pages_fast+0xcc/0x160 mm/gup.c:3530 iov_iter_extract_user_pages lib/iov_iter.c:1849 [inline] iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1912 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:213 [inline] do_direct_IO fs/direct-io.c:915 [inline] __blockdev_direct_IO+0x1443/0x4890 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3412 [inline] ntfs_direct_IO+0x194/0x370 fs/ntfs3/inode.c:809 generic_file_direct_write+0x1e6/0x400 mm/filemap.c:4036 __generic_file_write_iter+0x126/0x230 mm/filemap.c:4205 ntfs_file_write_iter+0x6ee/0x7f0 fs/ntfs3/file.c:1267 do_iter_readv_writev+0x71a/0x9d0 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 do_pwritev fs/read_write.c:1146 [inline] __do_sys_pwritev2 fs/read_write.c:1204 [inline] __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#19); lock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#19); rlock(&mm->mmap_lock); *** DEADLOCK *** 2 locks held by syz-executor324/5416: #0: ffff88801e31a420 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline] #0: ffff88801e31a420 (sb_writers#13){.+.+}-{0:0}, at: vfs_writev+0x2d6/0xbc0 fs/read_write.c:1048 #1: ffff888048af6a68 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: inode_trylock include/linux/fs.h:897 [inline] #1: ffff888048af6a68 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: ntfs_file_write_iter+0x294/0x7f0 fs/ntfs3/file.c:1240 stack backtrace: CPU: 0 UID: 0 PID: 5416 Comm: syz-executor324 Not tainted 6.14.0-rc7-syzkaller-00067-g76b6905c11fd #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208 check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 gup_fast_fallback+0x25f/0x29c0 mm/gup.c:3406 pin_user_pages_fast+0xcc/0x160 mm/gup.c:3530 iov_iter_extract_user_pages lib/iov_iter.c:1849 [inline] iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1912 dio_refill_pages fs/direct-io.c:172 [inline] dio_get_page fs/direct-io.c:213 [inline] do_direct_IO fs/direct-io.c:915 [inline] __blockdev_direct_IO+0x1443/0x4890 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3412 [inline] ntfs_direct_IO+0x194/0x370 fs/ntfs3/inode.c:809 generic_file_direct_write+0x1e6/0x400 mm/filemap.c:4036 __generic_file_write_iter+0x126/0x230 mm/filemap.c:4205 ntfs_file_write_iter+0x6ee/0x7f0 fs/ntfs3/file.c:1267 do_iter_readv_writev+0x71a/0x9d0 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 do_pwritev fs/read_write.c:1146 [inline] __do_sys_pwritev2 fs/read_write.c:1204 [inline] __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd6695242b9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 1d 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:00007fd6694cd158 EFLAGS: 00000212 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fd6695ca4e8 RCX: 00007fd6695242b9 RDX: 0000000000000002 RSI: 0000400000000240 RDI: 0000000000000005 RBP: 00007fd6695ca4e0 R08: 0000000000041001 R09: 0000000000000003 R10: 0000000000001200 R11: 0000000000000212 R12: 00007fd6695ca4ec R13: 0000000000000016 R14: 00007ffce1f969a0 R15: 00007ffce1f96a88