====================================================== WARNING: possible circular locking dependency detected 6.7.0-rc5-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/9325 is trying to acquire lock: ffff8880314d9038 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397 but task is already holding lock: ffff8880657500b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock#2/1){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33 hfs_ext_read_extent+0x19c/0x9d0 fs/hfs/extent.c:200 hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:401 hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234 hfs_cat_create+0x227/0x810 fs/hfs/catalog.c:104 hfs_mkdir+0x6a/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x577/0x820 fs/namei.c:4106 do_mkdirat+0x2fd/0x3a0 fs/namei.c:4129 __do_sys_mkdir fs/namei.c:4149 [inline] __se_sys_mkdir fs/namei.c:4147 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4147 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397 hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234 __hfs_ext_write_extent+0x3cb/0x520 fs/hfs/extent.c:121 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline] hfs_ext_read_extent+0x805/0x9d0 fs/hfs/extent.c:202 hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:401 hfs_get_block+0x17f/0x820 fs/hfs/extent.c:353 __block_write_begin_int+0x3c0/0x1560 fs/buffer.c:2119 __block_write_begin fs/buffer.c:2168 [inline] block_write_begin+0xb1/0x490 fs/buffer.c:2227 cont_write_begin+0x530/0x730 fs/buffer.c:2582 hfs_write_begin+0x87/0x140 fs/hfs/inode.c:58 generic_perform_write+0x278/0x600 mm/filemap.c:3918 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4013 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4039 call_write_iter include/linux/fs.h:2020 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x7f0 fs/read_write.c:860 vfs_writev+0x221/0x700 fs/read_write.c:933 do_pwritev+0x1af/0x260 fs/read_write.c:1030 __do_sys_pwritev2 fs/read_write.c:1089 [inline] __se_sys_pwritev2 fs/read_write.c:1080 [inline] __x64_sys_pwritev2+0xef/0x150 fs/read_write.c:1080 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&tree->tree_lock#2/1); lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock#2/1); lock(&HFS_I(tree->inode)->extents_lock); *** DEADLOCK *** 4 locks held by syz-executor.0/9325: #0: ffff88801f2d6418 (sb_writers#30){.+.+}-{0:0}, at: do_pwritev+0x1af/0x260 fs/read_write.c:1030 #1: ffff888023b45b68 (&sb->s_type->i_mutex_key#35){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888023b45b68 (&sb->s_type->i_mutex_key#35){+.+.}-{3:3}, at: generic_file_write_iter+0x92/0x350 mm/filemap.c:4036 #2: ffff888023b459b8 (&HFS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397 #3: ffff8880657500b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33 stack backtrace: CPU: 0 PID: 9325 Comm: syz-executor.0 Not tainted 6.7.0-rc5-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x317/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747 hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397 hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234 __hfs_ext_write_extent+0x3cb/0x520 fs/hfs/extent.c:121 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline] hfs_ext_read_extent+0x805/0x9d0 fs/hfs/extent.c:202 hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:401 hfs_get_block+0x17f/0x820 fs/hfs/extent.c:353 __block_write_begin_int+0x3c0/0x1560 fs/buffer.c:2119 __block_write_begin fs/buffer.c:2168 [inline] block_write_begin+0xb1/0x490 fs/buffer.c:2227 cont_write_begin+0x530/0x730 fs/buffer.c:2582 hfs_write_begin+0x87/0x140 fs/hfs/inode.c:58 generic_perform_write+0x278/0x600 mm/filemap.c:3918 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4013 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4039 call_write_iter include/linux/fs.h:2020 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x7f0 fs/read_write.c:860 vfs_writev+0x221/0x700 fs/read_write.c:933 do_pwritev+0x1af/0x260 fs/read_write.c:1030 __do_sys_pwritev2 fs/read_write.c:1089 [inline] __se_sys_pwritev2 fs/read_write.c:1080 [inline] __x64_sys_pwritev2+0xef/0x150 fs/read_write.c:1080 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7ff4ff87cba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff50059c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007ff4ff99bf80 RCX: 00007ff4ff87cba9 RDX: 0000000000000004 RSI: 0000000020000380 RDI: 0000000000000004 RBP: 00007ff4ff8c847a R08: 0000000000000000 R09: 0000000000000011 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff4ff99bf80 R15: 00007fff6b268108 syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=4169, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4169, lost async page write syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=4170, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4170, lost async page write syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=4172, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4172, lost async page write syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=4173, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4173, lost async page write syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=4174, nr_sectors = 1 limit=64