memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4999 'syz-executor404' loop0: detected capacity change from 0 to 1024 ====================================================== WARNING: possible circular locking dependency detected 6.4.0-syzkaller-01406-ge8f75c0270d9 #0 Not tainted ------------------------------------------------------ syz-executor404/4999 is trying to acquire lock: ffff8880222a20b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0xe93/0x10e0 fs/hfsplus/extents.c:595 but task is already holding lock: ffff88807d1107c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x205/0x10e0 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}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 hfsplus_file_extend+0x1bf/0xf90 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x31c/0x410 fs/hfsplus/btree.c:358 hfsplus_rename_cat+0x271/0x1270 fs/hfsplus/catalog.c:456 hfsplus_unlink+0x4ad/0x830 fs/hfsplus/dir.c:376 vfs_unlink+0x355/0x930 fs/namei.c:4329 do_unlinkat+0x3e3/0x680 fs/namei.c:4395 __do_sys_unlink fs/namei.c:4443 [inline] __se_sys_unlink fs/namei.c:4441 [inline] __x64_sys_unlink+0xca/0x110 fs/namei.c:4441 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&tree->tree_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain kernel/locking/lockdep.c:3847 [inline] __lock_acquire+0x2fcd/0x5f30 kernel/locking/lockdep.c:5088 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 hfsplus_file_truncate+0xe93/0x10e0 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1f2/0x320 fs/hfsplus/inode.c:269 notify_change+0xb2c/0x1180 fs/attr.c:483 do_truncate+0x143/0x200 fs/open.c:66 handle_truncate fs/namei.c:3295 [inline] do_open fs/namei.c:3640 [inline] path_openat+0x2047/0x2710 fs/namei.c:3793 do_filp_open+0x1ba/0x410 fs/namei.c:3820 do_sys_openat2+0x16d/0x510 fs/open.c:1402 do_sys_open fs/open.c:1418 [inline] __do_sys_creat fs/open.c:1494 [inline] __se_sys_creat fs/open.c:1488 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1488 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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(&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-executor404/4999: #0: ffff8880222a0460 (sb_writers#9){.+.+}-{0:0}, at: do_open fs/namei.c:3629 [inline] #0: ffff8880222a0460 (sb_writers#9){.+.+}-{0:0}, at: path_openat+0x1959/0x2710 fs/namei.c:3793 #1: ffff88807d1109c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88807d1109c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x131/0x200 fs/open.c:64 #2: ffff88807d1107c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x205/0x10e0 fs/hfsplus/extents.c:576 stack backtrace: CPU: 1 PID: 4999 Comm: syz-executor404 Not tainted 6.4.0-syzkaller-01406-ge8f75c0270d9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain kernel/locking/lockdep.c:3847 [inline] __lock_acquire+0x2fcd/0x5f30 kernel/locking/lockdep.c:5088 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 hfsplus_file_truncate+0xe93/0x10e0 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1f2/0x320 fs/hfsplus/inode.c:269 notify_change+0xb2c/0x1180 fs/attr.c:483 do_truncate+0x143/0x200 fs/open.c:66 handle_truncate fs/namei.c:3295 [inline] do_open fs/namei.c:3640 [inline] path_openat+0x2047/0x2710 fs/namei.c:3793 do_filp_open+0x1ba/0x410 fs/namei.c:3820 do_sys_openat2+0x16d/0x510 fs/open.c:1402 do_sys_open fs/open.c:1418 [inline] __do_sys_creat fs/open.c:1494 [inline] __se_sys_creat fs/open.c:1488 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1488 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f35bad38869 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd25854c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f35bad7c060 RCX: 00007f35bad38869 RDX: 00007f35bad38869 RSI: 000000