loop0: detected capacity change from 0 to 1024 ====================================================== WARNING: possible circular locking dependency detected 5.15.120-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor405/3500 is trying to acquire lock: ffff88807e6ec0b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x864/0xb80 fs/hfsplus/extents.c:595 but task is already holding lock: ffff88807bd62988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x2e1/0xb80 fs/hfsplus/extents.c:576 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 hfsplus_file_extend+0x1d2/0x1b10 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x101/0x4e0 fs/hfsplus/btree.c:357 hfsplus_rename_cat+0x1cf/0x1090 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x304/0x7f0 fs/hfsplus/dir.c:376 vfs_unlink+0x359/0x5f0 fs/namei.c:4209 do_unlinkat+0x49d/0x940 fs/namei.c:4277 __do_sys_unlink fs/namei.c:4325 [inline] __se_sys_unlink fs/namei.c:4323 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4323 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+0x61/0xcb -> #0 (&tree->tree_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 hfsplus_file_truncate+0x864/0xb80 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1b9/0x280 fs/hfsplus/inode.c:267 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 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+0x61/0xcb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); *** DEADLOCK *** 3 locks held by syz-executor405/3500: #0: ffff88807e6ea460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff88807bd62b80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff88807bd62b80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x208/0x300 fs/open.c:63 #2: ffff88807bd62988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x2e1/0xb80 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 3500 Comm: syz-executor405 Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 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+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 hfsplus_file_truncate+0x864/0xb80 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1b9/0x280 fs/hfsplus/inode.c:267 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 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+0x61/0xcb RIP: 0033:0x7fe123f4a879 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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:00007ffc69e936c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ffc69e938a8 RCX: 00007fe123f4a879