hfs: request for non-existent node 16777216 in B*Tree hfs: request for non-existent node 16777216 in B*Tree ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc6-syzkaller-gc919f08732cc #0 Not tainted ------------------------------------------------------ syz.1.218/7475 is trying to acquire lock: ffff0000f30e80b0 (&tree->tree_lock#2/1){+.+.}-{4:4}, at: hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 but task is already holding lock: ffff0000f08c1478 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xd4/0xf4c fs/hfs/extent.c:397 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}: __mutex_lock_common+0x1d0/0x2190 kernel/locking/mutex.c:601 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 hfs_extend_file+0xd4/0xf4c fs/hfs/extent.c:397 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:234 __hfs_ext_write_extent+0x19c/0x488 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x84/0x750 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x264/0xf4c fs/hfs/extent.c:401 hfs_get_block+0x2e8/0x9cc fs/hfs/extent.c:353 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2151 block_write_begin fs/buffer.c:2262 [inline] cont_write_begin+0x62c/0x968 fs/buffer.c:2601 hfs_write_begin+0x7c/0xc4 fs/hfs/inode.c:52 cont_expand_zero fs/buffer.c:2528 [inline] cont_write_begin+0x26c/0x968 fs/buffer.c:2591 hfs_write_begin+0x7c/0xc4 fs/hfs/inode.c:52 generic_perform_write+0x23c/0x79c mm/filemap.c:4103 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4220 generic_file_write_iter+0x104/0x470 mm/filemap.c:4246 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x62c/0x97c fs/read_write.c:684 ksys_pwrite64 fs/read_write.c:791 [inline] __do_sys_pwrite64 fs/read_write.c:799 [inline] __se_sys_pwrite64 fs/read_write.c:796 [inline] __arm64_sys_pwrite64+0x170/0x208 fs/read_write.c:796 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&tree->tree_lock#2/1){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 __mutex_lock_common+0x1d0/0x2190 kernel/locking/mutex.c:601 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x238/0xf4c fs/hfs/extent.c:401 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:234 hfs_cat_move+0x16c/0x818 fs/hfs/catalog.c:310 hfs_rename+0x1a0/0x26c fs/hfs/dir.c:299 vfs_rename+0x8e8/0xc80 fs/namei.c:5121 do_renameat2+0x74c/0xa40 fs/namei.c:5270 __do_sys_renameat2 fs/namei.c:5304 [inline] __se_sys_renameat2 fs/namei.c:5301 [inline] __arm64_sys_renameat2+0xd8/0xf4 fs/namei.c:5301 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock#2/1); lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock#2/1); *** DEADLOCK *** 8 locks held by syz.1.218/7475: #0: ffff0000d777a420 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:556 #1: ffff0000d777a730 (&type->s_vfs_rename_key#2){+.+.}-{4:4}, at: lock_rename fs/namei.c:3269 [inline] #1: ffff0000d777a730 (&type->s_vfs_rename_key#2){+.+.}-{4:4}, at: do_renameat2+0x330/0xa40 fs/namei.c:5216 #2: ffff0000f08c1ca0 (&type->i_mutex_dir_key#15/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #2: ffff0000f08c1ca0 (&type->i_mutex_dir_key#15/1){+.+.}-{4:4}, at: lock_two_directories+0x144/0x214 fs/namei.c:3235 #3: ffff0000f08c2320 (&type->i_mutex_dir_key#15/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #3: ffff0000f08c2320 (&type->i_mutex_dir_key#15/5){+.+.}-{4:4}, at: lock_two_directories+0x16c/0x214 fs/namei.c:3236 #4: ffff0000f08c29a0 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #4: ffff0000f08c29a0 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: lock_two_nondirectories+0xc4/0x150 fs/inode.c:1233 #5: ffff0000f08c3020 (&sb->s_type->i_mutex_key#29/4){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #5: ffff0000f08c3020 (&sb->s_type->i_mutex_key#29/4){+.+.}-{4:4}, at: lock_two_nondirectories+0xf0/0x150 fs/inode.c:1235 #6: ffff0000f30ea0b0 (&tree->tree_lock#2){+.+.}-{4:4}, at: hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 #7: ffff0000f08c1478 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xd4/0xf4c fs/hfs/extent.c:397 stack backtrace: CPU: 1 UID: 0 PID: 7475 Comm: syz.1.218 Not tainted 6.15.0-rc6-syzkaller-gc919f08732cc #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2079 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 __mutex_lock_common+0x1d0/0x2190 kernel/locking/mutex.c:601 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x238/0xf4c fs/hfs/extent.c:401 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:234 hfs_cat_move+0x16c/0x818 fs/hfs/catalog.c:310 hfs_rename+0x1a0/0x26c fs/hfs/dir.c:299 vfs_rename+0x8e8/0xc80 fs/namei.c:5121 do_renameat2+0x74c/0xa40 fs/namei.c:5270 __do_sys_renameat2 fs/namei.c:5304 [inline] __se_sys_renameat2 fs/namei.c:5301 [inline] __arm64_sys_renameat2+0xd8/0xf4 fs/namei.c:5301 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 hfs: request for non-existent node 16777216 in B*Tree hfs: request for non-existent node 16777216 in B*Tree