====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc8-syzkaller-00154-g296a7b7eb792 #0 Not tainted ------------------------------------------------------ syz-executor168/3652 is trying to acquire lock: ffff8880799487c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1bf/0xf60 fs/hfsplus/extents.c:457 but task is already holding lock: ffff8880757b80b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x1bb/0x230 fs/hfsplus/bfind.c:30 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747 hfsplus_file_truncate+0xe87/0x10d0 fs/hfsplus/extents.c:595 hfsplus_delete_inode+0x191/0x220 fs/hfsplus/inode.c:454 hfsplus_unlink+0x5a6/0x830 fs/hfsplus/dir.c:405 vfs_unlink+0x355/0x930 fs/namei.c:4252 do_unlinkat+0x3d0/0x660 fs/namei.c:4320 __do_sys_unlinkat fs/namei.c:4363 [inline] __se_sys_unlinkat fs/namei.c:4356 [inline] __x64_sys_unlinkat+0xc1/0x130 fs/namei.c:4356 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747 hfsplus_file_extend+0x1bf/0xf60 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x31c/0x410 fs/hfsplus/btree.c:358 hfsplus_rename_cat+0x271/0x1270 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x4ad/0x830 fs/hfsplus/dir.c:376 vfs_unlink+0x355/0x930 fs/namei.c:4252 do_unlinkat+0x3d0/0x660 fs/namei.c:4320 do_coredump+0x1136/0x3c70 fs/coredump.c:666 get_signal+0x1bf1/0x2440 kernel/signal.c:2844 arch_do_signal_or_restart+0x86/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1578 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** 5 locks held by syz-executor168/3652: #0: ffff8880757bc460 (sb_writers#9){.+.+}-{0:0}, at: do_unlinkat+0x183/0x660 fs/namei.c:4299 #1: ffff888079949e00 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff888079949e00 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: do_unlinkat+0x270/0x660 fs/namei.c:4303 #2: ffff88807ba7b900 (&sb->s_type->i_mutex_key#17){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #2: ffff88807ba7b900 (&sb->s_type->i_mutex_key#17){+.+.}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4241 #3: ffff888079ac8198 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x151/0x830 fs/hfsplus/dir.c:370 #4: ffff8880757b80b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x1bb/0x230 fs/hfsplus/bfind.c:30 stack backtrace: CPU: 0 PID: 3652 Comm: syz-executor168 Not tainted 6.1.0-rc8-syzkaller-00154-g296a7b7eb792 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747 hfsplus_file_extend+0x1bf/0xf60 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x31c/0x410 fs/hfsplus/btree.c:358 hfsplus_rename_cat+0x271/0x1270 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x4ad/0x830 fs/hfsplus/dir.c:376 vfs_unlink+0x355/0x930 fs/namei.c:4252 do_unlinkat+0x3d0/0x660 fs/namei.c:4320 do_coredump+0x1136/0x3c70 fs/coredump.c:666 get_signal+0x1bf1/0x2440 kernel/signal.c:2844 arch_do_signal_or_restart+0x86/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1578 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:0000000020000048 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 000000000000000d RCX: 00007f8cadd36f29 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000080 RBP: 00007fff860a83b8 R08: 000000000