====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0 Not tainted ------------------------------------------------------ syz-executor.3/14196 is trying to acquire lock: ffff88802b0920b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x167/0x1e0 but task is already holding lock: ffff888076600df8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xde/0x1420 fs/hfs/extent.c:397 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}: lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 hfs_extend_file+0xde/0x1420 fs/hfs/extent.c:397 hfs_bmap_reserve+0xfa/0x410 fs/hfs/btree.c:234 __hfs_ext_write_extent+0x1ea/0x460 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x67/0x980 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x323/0x1420 fs/hfs/extent.c:401 hfs_get_block+0x3fc/0xbb0 fs/hfs/extent.c:353 __block_write_begin_int+0x54c/0x1a80 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x93/0x1e0 fs/buffer.c:2102 cont_write_begin+0x606/0x860 fs/buffer.c:2456 hfs_write_begin+0x86/0xd0 fs/hfs/inode.c:58 cont_expand_zero fs/buffer.c:2383 [inline] cont_write_begin+0x2cf/0x860 fs/buffer.c:2446 hfs_write_begin+0x86/0xd0 fs/hfs/inode.c:58 hfs_file_truncate+0x159/0xa10 fs/hfs/extent.c:494 hfs_inode_setattr+0x45d/0x690 fs/hfs/inode.c:651 notify_change+0xe50/0x1100 fs/attr.c:482 do_truncate+0x200/0x2f0 fs/open.c:65 do_sys_ftruncate+0x2b0/0x350 fs/open.c:193 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&tree->tree_lock/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 hfs_find_init+0x167/0x1e0 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x2f8/0x1420 fs/hfs/extent.c:401 hfs_bmap_reserve+0xfa/0x410 fs/hfs/btree.c:234 hfs_cat_create+0x1b5/0x8a0 fs/hfs/catalog.c:104 hfs_mkdir+0x68/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x3b3/0x590 fs/namei.c:4036 do_mkdirat+0x25b/0x530 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock/1); lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock/1); *** DEADLOCK *** 4 locks held by syz-executor.3/14196: #0: ffff88807c9ac460 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508 #1: ffff8880766036a8 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff8880766036a8 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x22a/0x4f0 fs/namei.c:3807 #2: ffff88804d1c40b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfs_find_init+0x167/0x1e0 #3: ffff888076600df8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xde/0x1420 fs/hfs/extent.c:397 stack backtrace: CPU: 0 PID: 14196 Comm: syz-executor.3 Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 check_noncircular+0x2cc/0x390 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668 __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 hfs_find_init+0x167/0x1e0 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x2f8/0x1420 fs/hfs/extent.c:401 hfs_bmap_reserve+0xfa/0x410 fs/hfs/btree.c:234 hfs_cat_create+0x1b5/0x8a0 fs/hfs/catalog.c:104 hfs_mkdir+0x68/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x3b3/0x590 fs/namei.c:4036 do_mkdirat+0x25b/0x530 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2c3f68c0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f2c40336168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f2c3f7ac050 RCX: 00007f2c3f68c0a9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007f2c3f6e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9b3f420f R14: 00007f2c40336300 R15: 0000000000022000 hfs: request for non-existent node 16777216 in B*Tree hfs: request for non-existent node 16777216 in B*Tree