loop0: detected capacity change from 0 to 1024 hfsplus: extend alloc file! (134219776,512,16777719) ============================================ WARNING: possible recursive locking detected syzkaller #0 Not tainted -------------------------------------------- syz.0.0/5353 is trying to acquire lock: ffff888052e51548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x39e/0x1530 fs/hfsplus/extents.c:260 but task is already holding lock: ffff888052e5c108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x294/0xb40 fs/hfsplus/extents.c:574 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 9 locks held by syz.0.0/5353: #0: ffff8880363b0428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557 #1: ffff8880363b0738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline] #1: ffff8880363b0738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224 #2: ffff888052e51df8 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #2: ffff888052e51df8 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242 #3: ffff888052e53238 (&type->i_mutex_dir_key#9/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #3: ffff888052e53238 (&type->i_mutex_dir_key#9/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243 #4: ffff888052e538f8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #4: ffff888052e538f8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: lock_two_nondirectories+0xe7/0x180 fs/inode.c:1232 #5: ffff888052e5c2f8 (&sb->s_type->i_mutex_key#20/4){+.+.}-{4:4}, at: vfs_rename+0x6d8/0xf00 fs/namei.c:5100 #6: ffff888052e40198 (&sbi->vh_mutex){+.+.}-{4:4}, at: hfsplus_unlink+0x160/0x730 fs/hfsplus/dir.c:370 #7: ffff888052e5c108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x294/0xb40 fs/hfsplus/extents.c:574 #8: ffff888052e400f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_free+0xbe/0x550 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_deadlock_bug+0x28b/0x2a0 kernel/locking/lockdep.c:3041 check_deadlock kernel/locking/lockdep.c:3093 [inline] validate_chain+0x1a3f/0x2140 kernel/locking/lockdep.c:3895 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x187/0x1350 kernel/locking/mutex.c:760 hfsplus_get_block+0x39e/0x1530 fs/hfsplus/extents.c:260 block_read_full_folio+0x29f/0x830 fs/buffer.c:2420 filemap_read_folio+0x114/0x380 mm/filemap.c:2413 do_read_cache_folio+0x350/0x590 mm/filemap.c:3957 do_read_cache_page mm/filemap.c:4023 [inline] read_cache_page+0x5d/0x170 mm/filemap.c:4032 read_mapping_page include/linux/pagemap.h:985 [inline] hfsplus_block_free+0x121/0x550 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x10d/0xa60 fs/hfsplus/extents.c:360 hfsplus_file_truncate+0x736/0xb40 fs/hfsplus/extents.c:589 hfsplus_delete_inode+0x180/0x230 fs/hfsplus/inode.c:-1 hfsplus_unlink+0x4e3/0x730 fs/hfsplus/dir.c:405 hfsplus_rename+0xcb/0x1c0 fs/hfsplus/dir.c:547 vfs_rename+0xbd7/0xf00 fs/namei.c:5129 do_renameat2+0x6ce/0xa80 fs/namei.c:5278 __do_sys_rename fs/namei.c:5325 [inline] __se_sys_rename fs/namei.c:5323 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5323 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f01e9f8ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f01e63f5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f01ea1b5fa0 RCX: 00007f01e9f8ebe9 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000200000000040 RBP: 00007f01ea011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f01ea1b6038 R14: 00007f01ea1b5fa0 R15: 00007ffd69abb088 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: extend alloc file! (134219776,512,16777719) hfsplus: extend alloc file! (134219776,512,16777719) hfsplus: extend alloc file! (134219776,512,16777719)