loop4: detected capacity change from 0 to 1024 ====================================================== WARNING: possible circular locking dependency detected 6.9.0-syzkaller-05151-g1b294a1f3561 #0 Not tainted ------------------------------------------------------ syz-executor.4/16015 is trying to acquire lock: ffff88802b69ea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:155 but task is already holding lock: ffff8880626e80b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&tree->tree_lock){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfsplus_file_truncate+0x811/0xb50 fs/hfsplus/extents.c:595 hfsplus_file_release+0xf7/0x3e0 fs/hfsplus/inode.c:234 __fput+0x42b/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1541 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&hip->extents_lock){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfsplus_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260 block_read_full_folio+0x430/0xe10 fs/buffer.c:2384 read_pages+0x5fb/0x840 mm/readahead.c:180 page_cache_ra_unbounded+0x67f/0x7a0 mm/readahead.c:269 do_sync_mmap_readahead+0x49c/0x970 filemap_fault+0x826/0x1760 mm/filemap.c:3289 __do_fault+0x137/0x460 mm/memory.c:4531 do_shared_fault mm/memory.c:4954 [inline] do_fault mm/memory.c:5028 [inline] do_pte_missing mm/memory.c:3880 [inline] handle_pte_fault mm/memory.c:5300 [inline] __handle_mm_fault+0x2361/0x7250 mm/memory.c:5441 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5606 do_user_addr_fault arch/x86/mm/fault.c:1332 [inline] handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x446/0x8a0 arch/x86/mm/fault.c:1533 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 -> #2 (mapping.invalidate_lock#4){.+.+}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:846 [inline] filemap_fault+0x655/0x1760 mm/filemap.c:3277 __do_fault+0x137/0x460 mm/memory.c:4531 do_shared_fault mm/memory.c:4954 [inline] do_fault mm/memory.c:5028 [inline] do_pte_missing mm/memory.c:3880 [inline] handle_pte_fault mm/memory.c:5300 [inline] __handle_mm_fault+0x2361/0x7250 mm/memory.c:5441 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5606 do_user_addr_fault arch/x86/mm/fault.c:1332 [inline] handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x446/0x8a0 arch/x86/mm/fault.c:1533 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 -> #1 (&vma->vm_lock->lock){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 vma_start_write include/linux/mm.h:730 [inline] vma_link+0x2c6/0x550 mm/mmap.c:416 insert_vm_struct+0x1a3/0x260 mm/mmap.c:3341 __bprm_mm_init fs/exec.c:282 [inline] bprm_mm_init fs/exec.c:384 [inline] alloc_bprm+0x543/0xa00 fs/exec.c:1588 kernel_execve+0x99/0xa10 fs/exec.c:2012 try_to_run_init_process init/main.c:1373 [inline] kernel_init+0xed/0x2b0 init/main.c:1501 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #0 (&mm->mmap_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 down_read_killable+0xca/0xd30 kernel/locking/rwsem.c:1549 mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:155 get_mmap_lock_carefully mm/memory.c:5642 [inline] lock_mm_and_find_vma+0x29c/0x2f0 mm/memory.c:5693 do_user_addr_fault arch/x86/mm/fault.c:1355 [inline] handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x1a9/0x8a0 arch/x86/mm/fault.c:1533 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 filldir64+0x2c0/0x6a0 fs/readdir.c:376 dir_emit include/linux/fs.h:3588 [inline] hfsplus_readdir+0xcd7/0x1320 fs/hfsplus/dir.c:248 iterate_dir+0x53b/0x6f0 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f 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); rlock(&mm->mmap_lock); *** DEADLOCK *** 3 locks held by syz-executor.4/16015: #0: ffff88806fa139c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x259/0x320 fs/file.c:1191 #1: ffff88805f193900 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: iterate_dir+0x436/0x6f0 fs/readdir.c:103 #2: ffff8880626e80b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 stack backtrace: CPU: 0 PID: 16015 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-05151-g1b294a1f3561 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 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+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 down_read_killable+0xca/0xd30 kernel/locking/rwsem.c:1549 mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:155 get_mmap_lock_carefully mm/memory.c:5642 [inline] lock_mm_and_find_vma+0x29c/0x2f0 mm/memory.c:5693 do_user_addr_fault arch/x86/mm/fault.c:1355 [inline] handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x1a9/0x8a0 arch/x86/mm/fault.c:1533 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:filldir64+0x2c0/0x6a0 fs/readdir.c:377 Code: 82 51 02 00 00 0f 01 cb 0f ae e8 48 8b 44 24 60 48 89 43 08 48 8b 4c 24 10 48 8b 44 24 58 48 89 01 48 8b 44 24 18 8b 6c 24 34 <66> 89 41 10 40 88 69 12 4d 63 f5 42 c6 44 31 13 00 4c 8d 79 13 bf RSP: 0018:ffffc900040c7880 EFLAGS: 00050202 RAX: 0000000000000020 RBX: 0000000020001fd8 RCX: 0000000020001ff8 RDX: 0000000000000000 RSI: 0000000020001fd8 RDI: 0000000020002018 RBP: 0000000000000008 R08: ffffffff82124839 R09: 1ffff11009574780 R10: dffffc0000000000 R11: ffffed1009574781 R12: ffff88801baad000 R13: 0000000000000005 R14: 0000000020002018 R15: 0000000020002018 dir_emit include/linux/fs.h:3588 [inline] hfsplus_readdir+0xcd7/0x1320 fs/hfsplus/dir.c:248 iterate_dir+0x53b/0x6f0 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f081867cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f08194490c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f08187abf80 RCX: 00007f081867cee9 RDX: 0000000000000fe0 RSI: 0000000020001f80 RDI: 0000000000000004 RBP: 00007f08186c949e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f08187abf80 R15: 00007ffc02023038 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 51 push %rcx 1: 02 00 add (%rax),%al 3: 00 0f add %cl,(%rdi) 5: 01 cb add %ecx,%ebx 7: 0f ae e8 lfence a: 48 8b 44 24 60 mov 0x60(%rsp),%rax f: 48 89 43 08 mov %rax,0x8(%rbx) 13: 48 8b 4c 24 10 mov 0x10(%rsp),%rcx 18: 48 8b 44 24 58 mov 0x58(%rsp),%rax 1d: 48 89 01 mov %rax,(%rcx) 20: 48 8b 44 24 18 mov 0x18(%rsp),%rax 25: 8b 6c 24 34 mov 0x34(%rsp),%ebp * 29: 66 89 41 10 mov %ax,0x10(%rcx) <-- trapping instruction 2d: 40 88 69 12 mov %bpl,0x12(%rcx) 31: 4d 63 f5 movslq %r13d,%r14 34: 42 c6 44 31 13 00 movb $0x0,0x13(%rcx,%r14,1) 3a: 4c 8d 79 13 lea 0x13(%rcx),%r15 3e: bf .byte 0xbf