loop1: detected capacity change from 0 to 1024 ====================================================== WARNING: possible circular locking dependency detected 5.15.155-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/7647 is trying to acquire lock: ffff0000e55086d8 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xa0/0x128 mm/memory.c:5327 but task is already holding lock: ffff0000db4c00b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&tree->tree_lock){+.+.}-{3:3}: __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 hfsplus_file_truncate+0x6d4/0x9cc fs/hfsplus/extents.c:595 hfsplus_file_release+0xf0/0x3b4 fs/hfsplus/inode.c:236 __fput+0x30c/0x7f0 fs/file_table.c:280 ____fput+0x20/0x30 fs/file_table.c:308 task_work_run+0x130/0x1e4 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x670/0x20bc kernel/exit.c:872 do_group_exit+0x110/0x268 kernel/exit.c:994 get_signal+0x634/0x1550 kernel/signal.c:2889 do_signal arch/arm64/kernel/signal.c:890 [inline] do_notify_resume+0x3d0/0x32b8 arch/arm64/kernel/signal.c:943 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #2 (&hip->extents_lock){+.+.}-{3:3}: __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 hfsplus_get_block+0x2c4/0x1194 fs/hfsplus/extents.c:260 block_read_full_page+0x2a0/0xc4c fs/buffer.c:2290 hfsplus_readpage+0x28/0x38 fs/hfsplus/inode.c:28 read_pages+0x298/0x420 mm/readahead.c:145 page_cache_ra_unbounded+0x534/0x654 mm/readahead.c:239 do_page_cache_ra+0x100/0x11c mm/readahead.c:269 do_sync_mmap_readahead+0x514/0x6d4 mm/filemap.c:2996 filemap_fault+0x5a4/0xf5c mm/filemap.c:3089 __do_fault+0x120/0x5d0 mm/memory.c:3898 do_read_fault mm/memory.c:4234 [inline] do_fault mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:4621 [inline] __handle_mm_fault mm/memory.c:4756 [inline] handle_mm_fault+0x220c/0x3424 mm/memory.c:4854 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x700/0xb60 arch/arm64/mm/fault.c:605 do_translation_fault+0xe8/0x138 arch/arm64/mm/fault.c:686 do_mem_abort+0x70/0x1d8 arch/arm64/mm/fault.c:819 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:358 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:418 el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:579 do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] strncpy_from_user+0x240/0x580 lib/strncpy_from_user.c:139 getname_flags+0x104/0x480 fs/namei.c:149 getname+0x28/0x38 fs/namei.c:217 do_sys_openat2+0xd4/0x3d8 fs/open.c:1247 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+0x1f0/0x240 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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #1 (mapping.invalidate_lock#4){.+.+}-{3:3}: down_read+0xc0/0x398 kernel/locking/rwsem.c:1498 filemap_invalidate_lock_shared include/linux/fs.h:844 [inline] filemap_fault+0x52c/0xf5c mm/filemap.c:3081 __do_fault+0x120/0x5d0 mm/memory.c:3898 do_read_fault mm/memory.c:4234 [inline] do_fault mm/memory.c:4362 [inline] handle_pte_fault mm/memory.c:4621 [inline] __handle_mm_fault mm/memory.c:4756 [inline] handle_mm_fault+0x220c/0x3424 mm/memory.c:4854 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x700/0xb60 arch/arm64/mm/fault.c:605 do_translation_fault+0xe8/0x138 arch/arm64/mm/fault.c:686 do_mem_abort+0x70/0x1d8 arch/arm64/mm/fault.c:819 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:358 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:418 el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:579 fault_in_readable+0x1b4/0x56c mm/gup.c:1793 fault_in_iov_iter_readable+0x130/0x1b0 lib/iov_iter.c:460 generic_perform_write+0x198/0x520 mm/filemap.c:3775 __generic_file_write_iter+0x230/0x454 mm/filemap.c:3912 generic_file_write_iter+0xb4/0x1b8 mm/filemap.c:3944 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x87c/0xb3c fs/read_write.c:594 ksys_write+0x15c/0x26c fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&mm->mmap_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+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __might_fault+0xc8/0x128 mm/memory.c:5328 filldir64+0x2bc/0x9e4 fs/readdir.c:335 dir_emit_dot include/linux/fs.h:3678 [inline] hfsplus_readdir+0x398/0xf68 fs/hfsplus/dir.c:159 iterate_dir+0x1f4/0x4e4 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4c4 fs/readdir.c:354 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 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: Chain exists of: &mm->mmap_lock --> &hip->extents_lock --> &tree->tree_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&tree->tree_lock); lock(&hip->extents_lock); lock(&tree->tree_lock); lock(&mm->mmap_lock); *** DEADLOCK *** 3 locks held by syz-executor.1/7647: #0: ffff0000cdc96d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x128/0x170 fs/file.c:1088 #1: ffff0000d328b900 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: iterate_dir+0x108/0x4e4 fs/readdir.c:55 #2: ffff0000db4c00b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc stack backtrace: CPU: 0 PID: 7647 Comm: syz-executor.1 Not tainted 5.15.155-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 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+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __might_fault+0xc8/0x128 mm/memory.c:5328 filldir64+0x2bc/0x9e4 fs/readdir.c:335 dir_emit_dot include/linux/fs.h:3678 [inline] hfsplus_readdir+0x398/0xf68 fs/hfsplus/dir.c:159 iterate_dir+0x1f4/0x4e4 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4c4 fs/readdir.c:354 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584