====================================================== WARNING: possible circular locking dependency detected 5.15.153-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/6390 is trying to acquire lock: ffff0000cd2d5578 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xe4/0x10e4 fs/hfs/extent.c:397 but task is already holding lock: ffff0000cebf00b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock/1){+.+.}-{3:3}: __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 hfs_find_init+0x148/0x1c8 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x24c/0x10e4 fs/hfs/extent.c:401 hfs_bmap_reserve+0xd0/0x3b4 fs/hfs/btree.c:231 hfs_cat_create+0x1bc/0x844 fs/hfs/catalog.c:104 hfs_mkdir+0x70/0xe4 fs/hfs/dir.c:232 vfs_mkdir+0x350/0x514 fs/namei.c:4065 do_mkdirat+0x20c/0x610 fs/namei.c:4090 __do_sys_mkdirat fs/namei.c:4105 [inline] __se_sys_mkdirat fs/namei.c:4103 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 hfs_extend_file+0xe4/0x10e4 fs/hfs/extent.c:397 hfs_bmap_reserve+0xd0/0x3b4 fs/hfs/btree.c:231 __hfs_ext_write_extent+0x1a0/0x468 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x84/0x754 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x278/0x10e4 fs/hfs/extent.c:401 hfs_get_block+0x3ac/0x9fc fs/hfs/extent.c:353 __block_write_begin_int+0x3ec/0x1608 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_write_begin fs/buffer.c:2122 [inline] cont_write_begin+0x538/0x710 fs/buffer.c:2471 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 cont_expand_zero fs/buffer.c:2398 [inline] cont_write_begin+0x26c/0x710 fs/buffer.c:2461 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 hfs_file_truncate+0x1a4/0xea4 fs/hfs/extent.c:494 hfs_inode_setattr+0x3a8/0x5c8 fs/hfs/inode.c:654 notify_change+0xa34/0xcf8 fs/attr.c:505 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&tree->tree_lock/1); lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock/1); lock(&HFS_I(tree->inode)->extents_lock); *** DEADLOCK *** 4 locks held by syz-executor.3/6390: #0: ffff0000cea48460 (sb_writers#13){.+.+}-{0:0}, at: do_sys_ftruncate+0x214/0x31c fs/open.c:190 #1: ffff0000dc423d28 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff0000dc423d28 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 #2: ffff0000dc423b78 (&HFS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xe4/0x10e4 fs/hfs/extent.c:397 #3: ffff0000cebf00b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8 stack backtrace: CPU: 0 PID: 6390 Comm: syz-executor.3 Not tainted 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 hfs_extend_file+0xe4/0x10e4 fs/hfs/extent.c:397 hfs_bmap_reserve+0xd0/0x3b4 fs/hfs/btree.c:231 __hfs_ext_write_extent+0x1a0/0x468 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x84/0x754 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x278/0x10e4 fs/hfs/extent.c:401 hfs_get_block+0x3ac/0x9fc fs/hfs/extent.c:353 __block_write_begin_int+0x3ec/0x1608 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_write_begin fs/buffer.c:2122 [inline] cont_write_begin+0x538/0x710 fs/buffer.c:2471 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 cont_expand_zero fs/buffer.c:2398 [inline] cont_write_begin+0x26c/0x710 fs/buffer.c:2461 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 hfs_file_truncate+0x1a4/0xea4 fs/hfs/extent.c:494 hfs_inode_setattr+0x3a8/0x5c8 fs/hfs/inode.c:654 notify_change+0xa34/0xcf8 fs/attr.c:505 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584