loop0: detected capacity change from 0 to 1024 hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree hfsplus: request for non-existent node 33423360 in B*Tree ============================================ WARNING: possible recursive locking detected syzkaller #0 Not tainted -------------------------------------------- syz.0.0/5325 is trying to acquire lock: ffff88804fdff300 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x391/0x1610 fs/hfsplus/extents.c:262 but task is already holding lock: ffff88804fe10100 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21c/0x1df0 fs/hfsplus/extents.c:455 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 6 locks held by syz.0.0/5325: #0: ffff888037256450 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494 #1: ffff88804fdfee58 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #1: ffff88804fdfee58 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: open_last_lookups fs/namei.c:4605 [inline] #1: ffff88804fdfee58 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: path_openat+0xae3/0x3830 fs/namei.c:4860 #2: ffff88801fcc7188 (&sbi->vh_mutex){+.+.}-{4:4}, at: hfsplus_mknod+0x86/0x3c0 fs/hfsplus/dir.c:521 #3: ffff8880373a00a8 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 fs/hfsplus/bfind.c:28 #4: ffff88804fe10100 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21c/0x1df0 fs/hfsplus/extents.c:455 #5: ffff88801fcc70f0 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0xa9/0xd30 fs/hfsplus/bitmap.c:35 stack backtrace: CPU: 0 UID: 0 PID: 5325 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 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_deadlock_bug+0x279/0x290 kernel/locking/lockdep.c:3041 check_deadlock kernel/locking/lockdep.c:3093 [inline] validate_chain kernel/locking/lockdep.c:3895 [inline] __lock_acquire+0x24df/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x19d/0x1550 kernel/locking/mutex.c:821 hfsplus_get_block+0x391/0x1610 fs/hfsplus/extents.c:262 block_read_full_folio+0x29f/0x810 fs/buffer.c:2398 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2510 do_read_cache_folio+0x354/0x590 mm/filemap.c:4140 do_read_cache_page mm/filemap.c:4206 [inline] read_cache_page+0x5d/0x170 mm/filemap.c:4215 read_mapping_page include/linux/pagemap.h:1009 [inline] hfsplus_block_allocate+0xf7/0xd30 fs/hfsplus/bitmap.c:37 hfsplus_file_extend+0xb77/0x1df0 fs/hfsplus/extents.c:466 hfsplus_bmap_reserve+0x170/0x590 fs/hfsplus/btree.c:512 hfsplus_create_cat+0x1ec/0x1240 fs/hfsplus/catalog.c:272 hfsplus_mknod+0x184/0x3c0 fs/hfsplus/dir.c:532 lookup_open fs/namei.c:4508 [inline] open_last_lookups fs/namei.c:4608 [inline] path_openat+0x133a/0x3830 fs/namei.c:4860 do_file_open+0x23e/0x4a0 fs/namei.c:4892 do_sys_openat2+0x115/0x200 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2f0c19de99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2f085f4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f2f0c425fa0 RCX: 00007f2f0c19de99 RDX: 000000000000275a RSI: 0000200000000340 RDI: ffffffffffffff9c RBP: 00007f2f0c233eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2f0c426038 R14: 00007f2f0c425fa0 R15: 00007ffda1ea8d38