====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc7-syzkaller-gc912bf709078 #0 Not tainted ------------------------------------------------------ syz-executor/6596 is trying to acquire lock: ffff0000ed2980b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x6d0/0x9b8 fs/hfsplus/extents.c:595 but task is already holding lock: ffff0000d604a2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x250/0x9b8 fs/hfsplus/extents.c:576 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:608 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 hfsplus_file_extend+0x1d0/0x1544 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:358 hfsplus_create_cat+0x18c/0x1318 fs/hfsplus/catalog.c:272 hfsplus_fill_super+0xf60/0x166c fs/hfsplus/super.c:566 mount_bdev+0x1d4/0x2a0 fs/super.c:1668 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:647 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1789 do_new_mount+0x278/0x900 fs/namespace.c:3352 path_mount+0x590/0xe04 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __arm64_sys_mount+0x3c4/0x488 fs/namespace.c:3875 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 -> #0 (&tree->tree_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5754 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:608 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 hfsplus_file_truncate+0x6d0/0x9b8 fs/hfsplus/extents.c:595 hfsplus_delete_inode+0x154/0x200 hfsplus_unlink+0x42c/0x690 fs/hfsplus/dir.c:405 vfs_unlink+0x2f0/0x534 fs/namei.c:4396 do_unlinkat+0x4d0/0x700 fs/namei.c:4460 __do_sys_unlinkat fs/namei.c:4503 [inline] __se_sys_unlinkat fs/namei.c:4496 [inline] __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4496 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); *** DEADLOCK *** 5 locks held by syz-executor/6596: #0: ffff0000f1f12420 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:409 #1: ffff0000d604ef00 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline] #1: ffff0000d604ef00 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: do_unlinkat+0x2dc/0x700 fs/namei.c:4447 #2: ffff0000d604a4c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #2: ffff0000d604a4c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: vfs_unlink+0xd8/0x534 fs/namei.c:4385 #3: ffff0000f2c8f998 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x144/0x690 fs/hfsplus/dir.c:370 #4: ffff0000d604a2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x250/0x9b8 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 6596 Comm: syz-executor Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2060 check_noncircular+0x310/0x404 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 kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5754 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:608 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 hfsplus_file_truncate+0x6d0/0x9b8 fs/hfsplus/extents.c:595 hfsplus_delete_inode+0x154/0x200 hfsplus_unlink+0x42c/0x690 fs/hfsplus/dir.c:405 vfs_unlink+0x2f0/0x534 fs/namei.c:4396 do_unlinkat+0x4d0/0x700 fs/namei.c:4460 __do_sys_unlinkat fs/namei.c:4503 [inline] __se_sys_unlinkat fs/namei.c:4496 [inline] __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4496 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598