============================================ WARNING: possible recursive locking detected 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0 Not tainted -------------------------------------------- syz-executor166/5072 is trying to acquire lock: ffff888011b69548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x277/0x9e0 fs/hfsplus/extents.c:260 but task is already holding lock: ffff888011b6a988 (&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-executor166/5072: #0: ffff88802b530420 (sb_writers#10){.+.+}-{0:0}, at: do_open fs/namei.c:3635 [inline] #0: ffff88802b530420 (sb_writers#10){.+.+}-{0:0}, at: path_openat+0x1fba/0x2990 fs/namei.c:3799 #1: ffff888011b6ab80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline] #1: ffff888011b6ab80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:63 #2: ffff888011b6a988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x204/0x9e0 fs/hfsplus/extents.c:576 #3: ffff888029fac0f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xd2/0x530 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 0 PID: 5072 Comm: syz-executor166 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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+0xe5/0x2c0 mm/filemap.c:2331 do_read_cache_folio+0x203/0x540 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+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f442e5a6a59 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007ffe13242958 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f442e5a6a59 RDX: 00007f442e5a5a51 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f442e61a5f0 R08: 0000000000000685 R09: 000055558bc844c0 R10: 00007ffe13242820 R11: 0000000000000246 R12: 00007ffe13242980 R13: 00007ffe13242ba8 R14: 431bde82d7b634db R15: 00007f442e5ef03b hfsplus: request for non-existent node 16777216 in B*Tree hfsplus: request for non-existent node 16777216 in B*Tree hfsplus: request for non-existent node 16777216 in B*Tree hfsplus: request for non-existent node 16777216 in B*Tree hfsplus: request for non-existent node 16777216 in B*Tree hfsplus: request for non-existent node 16777216 in B*Tree hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent