loop0: detected capacity change from 0 to 1024 ============================================ WARNING: possible recursive locking detected 6.9.0-syzkaller-08995-g0450d2083be6 #0 Not tainted -------------------------------------------- syz-executor104/5098 is trying to acquire lock: ffff888022b69548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260 but task is already holding lock: ffff888022b687c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:457 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 5 locks held by syz-executor104/5098: #0: ffff888022e340e0 (&type->s_umount_key#42/1){+.+.}-{3:3}, at: alloc_super+0x221/0x9d0 fs/super.c:343 #1: ffff88802adf7198 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_fill_super+0x1380/0x1ca0 fs/hfsplus/super.c:559 #2: ffff88807a3a00b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 #3: ffff888022b687c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:457 #4: ffff88802adf70f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_allocate+0x9e/0x8c0 fs/hfsplus/bitmap.c:35 stack backtrace: CPU: 0 PID: 5098 Comm: syz-executor104 Not tainted 6.9.0-syzkaller-08995-g0450d2083be6 #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_deadlock kernel/locking/lockdep.c:3062 [inline] validate_chain+0x15c1/0x58e0 kernel/locking/lockdep.c:3856 __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_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260 block_read_full_folio+0x430/0xe10 fs/buffer.c:2384 filemap_read_folio+0x1a2/0x790 mm/filemap.c:2331 do_read_cache_folio+0x134/0x820 mm/filemap.c:3747 do_read_cache_page+0x30/0x200 mm/filemap.c:3813 read_mapping_page include/linux/pagemap.h:890 [inline] hfsplus_block_allocate+0xee/0x8c0 fs/hfsplus/bitmap.c:37 hfsplus_file_extend+0xade/0x1b70 fs/hfsplus/extents.c:468 hfsplus_bmap_reserve+0x105/0x4e0 fs/hfsplus/btree.c:358 hfsplus_create_cat+0x1b0/0x1b60 fs/hfsplus/catalog.c:272 hfsplus_fill_super+0x13ee/0x1ca0 fs/hfsplus/super.c:566 mount_bdev+0x20c/0x2d0 fs/super.c:1658 legacy_get_tree+0xf0/0x190 fs/fs_context.c:662 vfs_get_tree+0x92/0x2a0 fs/super.c:1779 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 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: 0033:0x7fac602addea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffc36944048 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc36944060 RCX: 00007fac602addea RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc36944060 RBP: 0000000000000004 R08: 00007ffc369440a0 R09: 000000000000066c R10: 0000000000a08800 R11: 0000000000000286 R12: 0000000000a08800 R13: 00007ffc369440a0 R14: 0000000000000003 R15: 0000000000080000