====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc5-syzkaller-00200-g5bbd9b249880 #0 Not tainted ------------------------------------------------------ syz.2.1055/12619 is trying to acquire lock: ffff888063558778 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xff/0x1450 fs/hfs/extent.c:397 but task is already holding lock: ffff88802e8760b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x16e/0x1f0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock#2/1){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfs_find_init+0x16e/0x1f0 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x31b/0x1450 fs/hfs/extent.c:401 hfs_bmap_reserve+0xd9/0x400 fs/hfs/btree.c:234 hfs_cat_create+0x1e0/0x970 fs/hfs/catalog.c:104 hfs_mkdir+0x6c/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4131 do_mkdirat+0x264/0x3a0 fs/namei.c:4154 __do_sys_mkdir fs/namei.c:4174 [inline] __se_sys_mkdir fs/namei.c:4172 [inline] __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4172 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 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfs_extend_file+0xff/0x1450 fs/hfs/extent.c:397 hfs_bmap_reserve+0xd9/0x400 fs/hfs/btree.c:234 __hfs_ext_write_extent+0x22e/0x4f0 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x344/0x1450 fs/hfs/extent.c:401 hfs_get_block+0x3e4/0xb60 fs/hfs/extent.c:353 get_more_blocks fs/direct-io.c:649 [inline] do_direct_IO fs/direct-io.c:937 [inline] __blockdev_direct_IO+0x1d72/0x49d0 fs/direct-io.c:1249 blockdev_direct_IO include/linux/fs.h:3185 [inline] hfs_direct_IO+0xf8/0x1e0 fs/hfs/inode.c:133 generic_file_direct_write+0x130/0x350 mm/filemap.c:3940 __generic_file_write_iter+0x129/0x230 mm/filemap.c:4096 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4136 do_iter_readv_writev+0x5a4/0x800 vfs_writev+0x395/0xbe0 fs/read_write.c:971 do_pwritev fs/read_write.c:1072 [inline] __do_sys_pwritev fs/read_write.c:1119 [inline] __se_sys_pwritev fs/read_write.c:1114 [inline] __x64_sys_pwritev+0x1c7/0x2d0 fs/read_write.c:1114 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(&tree->tree_lock#2/1); lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock#2/1); lock(&HFS_I(tree->inode)->extents_lock); *** DEADLOCK *** 4 locks held by syz.2.1055/12619: #0: ffff88807bc0a420 (sb_writers#15){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2854 [inline] #0: ffff88807bc0a420 (sb_writers#15){.+.+}-{0:0}, at: vfs_writev+0x2d9/0xbe0 fs/read_write.c:969 #1: ffff88806355bd28 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff88806355bd28 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: generic_file_write_iter+0x83/0x310 mm/filemap.c:4133 #2: ffff88806355bb78 (&HFS_I(inode)->extents_lock#2){+.+.}-{3:3}, at: hfs_extend_file+0xff/0x1450 fs/hfs/extent.c:397 #3: ffff88802e8760b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x16e/0x1f0 stack backtrace: CPU: 1 PID: 12619 Comm: syz.2.1055 Not tainted 6.10.0-rc5-syzkaller-00200-g5bbd9b249880 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfs_extend_file+0xff/0x1450 fs/hfs/extent.c:397 hfs_bmap_reserve+0xd9/0x400 fs/hfs/btree.c:234 __hfs_ext_write_extent+0x22e/0x4f0 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x344/0x1450 fs/hfs/extent.c:401 hfs_get_block+0x3e4/0xb60 fs/hfs/extent.c:353 get_more_blocks fs/direct-io.c:649 [inline] do_direct_IO fs/direct-io.c:937 [inline] __blockdev_direct_IO+0x1d72/0x49d0 fs/direct-io.c:1249 blockdev_direct_IO include/linux/fs.h:3185 [inline] hfs_direct_IO+0xf8/0x1e0 fs/hfs/inode.c:133 generic_file_direct_write+0x130/0x350 mm/filemap.c:3940 __generic_file_write_iter+0x129/0x230 mm/filemap.c:4096 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4136 do_iter_readv_writev+0x5a4/0x800 vfs_writev+0x395/0xbe0 fs/read_write.c:971 do_pwritev fs/read_write.c:1072 [inline] __do_sys_pwritev fs/read_write.c:1119 [inline] __se_sys_pwritev fs/read_write.c:1114 [inline] __x64_sys_pwritev+0x1c7/0x2d0 fs/read_write.c:1114 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: 0033:0x7f400d575b99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f400e3d0048 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 00007f400d704078 RCX: 00007f400d575b99 RDX: 0000000000000003 RSI: 00000000200004c0 RDI: 0000000000000005 RBP: 00007f400d5f677e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f400d704078 R15: 00007ffd8f9f7f28