hfs: request for non-existent node 58 in B*Tree hfs: request for non-existent node 58 in B*Tree ====================================================== WARNING: possible circular locking dependency detected 5.15.189-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.466/5924 is trying to acquire lock: ffff0000e76a6278 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xd8/0x1000 fs/hfs/extent.c:397 but task is already holding lock: ffff0000d7bec0b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock#2/1){+.+.}-{3:3}: __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x250/0x1000 fs/hfs/extent.c:401 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:231 hfs_cat_create+0x1a0/0x758 fs/hfs/catalog.c:104 hfs_create+0x6c/0xe0 fs/hfs/dir.c:202 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x1144/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 hfs_extend_file+0xd8/0x1000 fs/hfs/extent.c:397 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:231 hfs_bmap_alloc+0x8c/0x604 fs/hfs/btree.c:258 hfs_bnode_split+0xc8/0xbb8 fs/hfsplus/brec.c:245 hfs_brec_insert+0x2e8/0x96c fs/hfs/brec.c:102 __hfs_ext_write_extent+0x230/0x488 fs/hfs/extent.c:124 hfs_ext_write_extent+0x144/0x1bc fs/hfs/extent.c:144 hfs_write_inode+0xbc/0x880 fs/hfs/inode.c:432 write_inode fs/fs-writeback.c:1495 [inline] __writeback_single_inode+0x560/0x11f0 fs/fs-writeback.c:1705 writeback_single_inode+0x1c0/0x720 fs/fs-writeback.c:1760 write_inode_now+0x1f8/0x25c fs/fs-writeback.c:2800 hfs_file_fsync+0xa8/0x144 fs/hfs/inode.c:680 vfs_fsync_range+0x168/0x188 fs/sync.c:188 generic_write_sync include/linux/fs.h:2989 [inline] generic_file_write_iter+0x158/0x1b4 mm/filemap.c:3948 do_iter_readv_writev+0x3a0/0x4f8 fs/read_write.c:-1 do_iter_write+0x1c4/0x670 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x1c8/0x2fc fs/read_write.c:1025 __do_sys_pwritev fs/read_write.c:1072 [inline] __se_sys_pwritev fs/read_write.c:1067 [inline] __arm64_sys_pwritev+0xa0/0xb8 fs/read_write.c:1067 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 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 *** 3 locks held by syz.0.466/5924: #0: ffff0000d8126460 (sb_writers#16){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:927 [inline] #0: ffff0000d8126460 (sb_writers#16){.+.+}-{0:0}, at: do_pwritev+0x1b4/0x2fc fs/read_write.c:1025 #1: ffff0000c1309ca8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000c1309ca8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: hfs_file_fsync+0x9c/0x144 fs/hfs/inode.c:677 #2: ffff0000d7bec0b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8 fs/hfs/bfind.c:-1 stack backtrace: CPU: 0 PID: 5924 Comm: syz.0.466 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2011 check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 hfs_extend_file+0xd8/0x1000 fs/hfs/extent.c:397 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:231 hfs_bmap_alloc+0x8c/0x604 fs/hfs/btree.c:258 hfs_bnode_split+0xc8/0xbb8 fs/hfsplus/brec.c:245 hfs_brec_insert+0x2e8/0x96c fs/hfs/brec.c:102 __hfs_ext_write_extent+0x230/0x488 fs/hfs/extent.c:124 hfs_ext_write_extent+0x144/0x1bc fs/hfs/extent.c:144 hfs_write_inode+0xbc/0x880 fs/hfs/inode.c:432 write_inode fs/fs-writeback.c:1495 [inline] __writeback_single_inode+0x560/0x11f0 fs/fs-writeback.c:1705 writeback_single_inode+0x1c0/0x720 fs/fs-writeback.c:1760 write_inode_now+0x1f8/0x25c fs/fs-writeback.c:2800 hfs_file_fsync+0xa8/0x144 fs/hfs/inode.c:680 vfs_fsync_range+0x168/0x188 fs/sync.c:188 generic_write_sync include/linux/fs.h:2989 [inline] generic_file_write_iter+0x158/0x1b4 mm/filemap.c:3948 do_iter_readv_writev+0x3a0/0x4f8 fs/read_write.c:-1 do_iter_write+0x1c4/0x670 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x1c8/0x2fc fs/read_write.c:1025 __do_sys_pwritev fs/read_write.c:1072 [inline] __se_sys_pwritev fs/read_write.c:1067 [inline] __arm64_sys_pwritev+0xa0/0xb8 fs/read_write.c:1067 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 hfs: request for non-existent node 59 in B*Tree hfs: request for non-existent node 59 in B*Tree