====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc7-syzkaller-gc912bf709078 #0 Not tainted ------------------------------------------------------ syz.1.179/7448 is trying to acquire lock: ffff0000d3f200b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x6d0/0x9b8 fs/hfsplus/extents.c:595 but task is already holding lock: ffff0000ec4da988 (&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: -> #2 (&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_attr+0x1b0/0x568 fs/hfsplus/attributes.c:221 __hfsplus_setxattr+0x978/0x1cf4 fs/hfsplus/xattr.c:354 hfsplus_initxattrs+0x150/0x20c fs/hfsplus/xattr_security.c:59 security_inode_init_security+0x210/0x3fc security/security.c:1744 hfsplus_init_security+0x40/0x54 fs/hfsplus/xattr_security.c:71 hfsplus_mknod+0x190/0x268 fs/hfsplus/dir.c:498 hfsplus_create+0x38/0x4c fs/hfsplus/dir.c:523 lookup_open fs/namei.c:3552 [inline] open_last_lookups fs/namei.c:3621 [inline] path_openat+0xfb8/0x2ae8 fs/namei.c:3857 do_filp_open+0x1bc/0x3cc fs/namei.c:3887 do_sys_openat2+0x124/0x1b8 fs/open.c:1413 do_sys_open fs/open.c:1428 [inline] __do_sys_openat fs/open.c:1444 [inline] __se_sys_openat fs/open.c:1439 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1439 __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 -> #1 (&tree->tree_lock/2){+.+.}-{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_find_init+0x144/0x1bc hfsplus_attr_exists+0xf8/0x1c8 fs/hfsplus/attributes.c:178 __hfsplus_setxattr+0x380/0x1cf4 fs/hfsplus/xattr.c:336 hfsplus_initxattrs+0x150/0x20c fs/hfsplus/xattr_security.c:59 security_inode_init_security+0x210/0x3fc security/security.c:1744 hfsplus_init_security+0x40/0x54 fs/hfsplus/xattr_security.c:71 hfsplus_mknod+0x190/0x268 fs/hfsplus/dir.c:498 hfsplus_create+0x38/0x4c fs/hfsplus/dir.c:523 lookup_open fs/namei.c:3552 [inline] open_last_lookups fs/namei.c:3621 [inline] path_openat+0xfb8/0x2ae8 fs/namei.c:3857 do_filp_open+0x1bc/0x3cc fs/namei.c:3887 do_sys_openat2+0x124/0x1b8 fs/open.c:1413 do_sys_open fs/open.c:1428 [inline] __do_sys_openat fs/open.c:1444 [inline] __se_sys_openat fs/open.c:1439 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1439 __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_write_failed+0x88/0xa4 fs/hfsplus/inode.c:37 hfsplus_write_begin+0xe0/0xe4 fs/hfsplus/inode.c:51 cont_expand_zero fs/buffer.c:2517 [inline] cont_write_begin+0x2d8/0xc40 fs/buffer.c:2580 hfsplus_write_begin+0x98/0xe4 fs/hfsplus/inode.c:47 generic_cont_expand_simple+0x160/0x258 fs/buffer.c:2481 hfsplus_setattr+0x140/0x238 fs/hfsplus/inode.c:259 notify_change+0x9d4/0xc84 fs/attr.c:497 do_truncate+0x1c0/0x28c fs/open.c:65 vfs_truncate+0x2b8/0x360 fs/open.c:111 do_sys_truncate+0xec/0x1b4 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __arm64_sys_truncate+0x5c/0x70 fs/open.c:144 __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: Chain exists of: &tree->tree_lock --> &tree->tree_lock/2 --> &HFSPLUS_I(inode)->extents_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock/2); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); *** DEADLOCK *** 3 locks held by syz.1.179/7448: #0: ffff0000d5130420 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:409 #1: ffff0000ec4dab80 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff0000ec4dab80 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 #2: ffff0000ec4da988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x250/0x9b8 fs/hfsplus/extents.c:576 stack backtrace: CPU: 1 PID: 7448 Comm: syz.1.179 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_write_failed+0x88/0xa4 fs/hfsplus/inode.c:37 hfsplus_write_begin+0xe0/0xe4 fs/hfsplus/inode.c:51 cont_expand_zero fs/buffer.c:2517 [inline] cont_write_begin+0x2d8/0xc40 fs/buffer.c:2580 hfsplus_write_begin+0x98/0xe4 fs/hfsplus/inode.c:47 generic_cont_expand_simple+0x160/0x258 fs/buffer.c:2481 hfsplus_setattr+0x140/0x238 fs/hfsplus/inode.c:259 notify_change+0x9d4/0xc84 fs/attr.c:497 do_truncate+0x1c0/0x28c fs/open.c:65 vfs_truncate+0x2b8/0x360 fs/open.c:111 do_sys_truncate+0xec/0x1b4 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __arm64_sys_truncate+0x5c/0x70 fs/open.c:144 __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