No control pipe specified ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc2-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/15155 is trying to acquire lock: ffff8880751f00f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xbb/0x4e0 fs/hfsplus/bitmap.c:182 but task is already holding lock: ffff88802ad79548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x2da/0xb50 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}: 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+0x42e/0xe10 fs/buffer.c:2407 filemap_read_folio+0x1a0/0x790 mm/filemap.c:2355 do_read_cache_folio+0x134/0x820 mm/filemap.c:3788 do_read_cache_page+0x30/0x200 mm/filemap.c:3854 read_mapping_page include/linux/pagemap.h:896 [inline] hfsplus_block_allocate+0xee/0x8c0 fs/hfsplus/bitmap.c:37 hfsplus_file_extend+0xade/0x1b70 fs/hfsplus/extents.c:468 hfsplus_get_block+0x406/0x14f0 fs/hfsplus/extents.c:245 __block_write_begin_int+0x50c/0x1a70 fs/buffer.c:2128 __block_write_begin fs/buffer.c:2177 [inline] block_write_begin+0x9b/0x1e0 fs/buffer.c:2236 cont_write_begin+0x645/0x890 fs/buffer.c:2590 hfsplus_write_begin+0x8a/0xd0 fs/hfsplus/inode.c:47 cont_expand_zero fs/buffer.c:2517 [inline] cont_write_begin+0x319/0x890 fs/buffer.c:2580 hfsplus_write_begin+0x8a/0xd0 fs/hfsplus/inode.c:47 generic_cont_expand_simple+0x18f/0x2b0 fs/buffer.c:2481 hfsplus_setattr+0x178/0x280 fs/hfsplus/inode.c:259 notify_change+0xb9d/0xe70 fs/attr.c:497 do_truncate fs/open.c:65 [inline] do_ftruncate+0x46b/0x590 fs/open.c:181 do_sys_ftruncate fs/open.c:199 [inline] __do_sys_ftruncate fs/open.c:207 [inline] __se_sys_ftruncate fs/open.c:205 [inline] __x64_sys_ftruncate+0x95/0xf0 fs/open.c:205 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&sbi->alloc_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 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_block_free+0xbb/0x4e0 fs/hfsplus/bitmap.c:182 hfsplus_free_extents+0x17a/0xae0 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0x7d0/0xb50 fs/hfsplus/extents.c:591 hfsplus_delete_inode+0x174/0x220 hfsplus_unlink+0x684/0x790 fs/hfsplus/dir.c:401 vfs_unlink+0x365/0x650 fs/namei.c:4343 do_unlinkat+0x4ae/0x830 fs/namei.c:4407 __do_sys_unlink fs/namei.c:4455 [inline] __se_sys_unlink fs/namei.c:4453 [inline] __x64_sys_unlink+0x49/0x60 fs/namei.c:4453 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&sbi->alloc_mutex); lock(&HFSPLUS_I(inode)->extents_lock); lock(&sbi->alloc_mutex); *** DEADLOCK *** 5 locks held by syz-executor.4/15155: #0: ffff888053162420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409 #1: ffff88802ad7dac0 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline] #1: ffff88802ad7dac0 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4394 #2: ffff88802ad79740 (&sb->s_type->i_mutex_key#32){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #2: ffff88802ad79740 (&sb->s_type->i_mutex_key#32){++++}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4332 #3: ffff8880751f0198 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x161/0x790 fs/hfsplus/dir.c:370 #4: ffff88802ad79548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x2da/0xb50 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 15155 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller #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+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 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_block_free+0xbb/0x4e0 fs/hfsplus/bitmap.c:182 hfsplus_free_extents+0x17a/0xae0 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0x7d0/0xb50 fs/hfsplus/extents.c:591 hfsplus_delete_inode+0x174/0x220 hfsplus_unlink+0x684/0x790 fs/hfsplus/dir.c:401 vfs_unlink+0x365/0x650 fs/namei.c:4343 do_unlinkat+0x4ae/0x830 fs/namei.c:4407 __do_sys_unlink fs/namei.c:4455 [inline] __se_sys_unlink fs/namei.c:4453 [inline] __x64_sys_unlink+0x49/0x60 fs/namei.c:4453 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fde7b67cee9 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:00007fde7c3830c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007fde7b7b3fa0 RCX: 00007fde7b67cee9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007fde7b6c947f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fde7b7b3fa0 R15: 00007ffe3d91f9f8