============================================ WARNING: possible recursive locking detected 6.9.0-rc1-syzkaller-00021-g962490525cff #0 Not tainted -------------------------------------------- syz-executor389/5186 is trying to acquire lock: ffff8880243c8e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x277/0x9e0 fs/hfsplus/extents.c:260 but task is already holding lock: ffff8880243ca2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x204/0x9e0 fs/hfsplus/extents.c:576 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz-executor389/5186: #0: ffff888026278420 (sb_writers#10){.+.+}-{0:0}, at: do_open fs/namei.c:3635 [inline] #0: ffff888026278420 (sb_writers#10){.+.+}-{0:0}, at: path_openat+0x1fba/0x2990 fs/namei.c:3799 #1: ffff8880243ca4c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #1: ffff8880243ca4c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:63 #2: ffff8880243ca2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x204/0x9e0 fs/hfsplus/extents.c:576 #3: ffff88801b1eb8f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xd2/0x530 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 0 PID: 5186 Comm: syz-executor389 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_deadlock kernel/locking/lockdep.c:3062 [inline] validate_chain kernel/locking/lockdep.c:3856 [inline] __lock_acquire+0x20e6/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 hfsplus_get_block+0x277/0x9e0 fs/hfsplus/extents.c:260 block_read_full_folio+0x38f/0xa70 fs/buffer.c:2384 filemap_read_folio+0xe7/0x2c0 mm/filemap.c:2331 do_read_cache_folio+0x207/0x550 mm/filemap.c:3747 do_read_cache_page mm/filemap.c:3813 [inline] read_cache_page+0x5b/0x160 mm/filemap.c:3822 read_mapping_page include/linux/pagemap.h:888 [inline] hfsplus_block_free+0x12f/0x530 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x3a6/0x520 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0x836/0x9e0 fs/hfsplus/extents.c:591 hfsplus_setattr+0x1eb/0x310 fs/hfsplus/inode.c:265 notify_change+0x742/0x11c0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 handle_truncate fs/namei.c:3300 [inline] do_open fs/namei.c:3646 [inline] path_openat+0x24b9/0x2990 fs/namei.c:3799 do_filp_open+0x1dc/0x430 fs/namei.c:3826 do_sys_openat2+0x17a/0x1e0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_creat fs/open.c:1497 [inline] __se_sys_creat fs/open.c:1491 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1491 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7efec21595f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1402bfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ffe1402c198 RCX: 00007efec21595f9 RDX: 00007efec2158691 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 00007efec21cc610 R08: 0000000000000604 R09: 0000000000000000 R10: 00007ffe1402be80 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe1402c188 R14: 0000000000000001 R15: 0000000000000001 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent