====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc7-syzkaller-gc912bf709078 #0 Not tainted ------------------------------------------------------ syz.4.146/7103 is trying to acquire lock: ffff0000d81700b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x6d0/0x9b8 fs/hfsplus/extents.c:595 but task is already holding lock: ffff0000ee4e0e88 (&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_rename_cat+0x1ac/0xf08 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x28c/0x690 fs/hfsplus/dir.c:376 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 -> #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 generic_perform_write+0x28c/0x588 mm/filemap.c:4015 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4110 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4136 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x8f8/0xc38 fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __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 *** 4 locks held by syz.4.146/7103: #0: ffff0000d9fd39c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1191 #1: ffff0000d8172420 (sb_writers#24){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2854 [inline] #1: ffff0000d8172420 (sb_writers#24){.+.+}-{0:0}, at: vfs_write+0x2e8/0xc38 fs/read_write.c:586 #2: ffff0000ee4e1080 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #2: ffff0000ee4e1080 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: generic_file_write_iter+0x88/0x2b4 mm/filemap.c:4133 #3: ffff0000ee4e0e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x250/0x9b8 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 7103 Comm: syz.4.146 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 generic_perform_write+0x28c/0x588 mm/filemap.c:4015 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4110 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4136 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x8f8/0xc38 fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __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