====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.9.802/9494 is trying to acquire lock: ffff8880473a3f60 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff8880473a3ff8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0x9f/0x320 fs/ocfs2/refcounttree.c:931 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 ocfs2_mknod+0xd5c/0x2540 fs/ocfs2/namei.c:413 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:676 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3796 open_last_lookups fs/namei.c:3895 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4131 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0x5ea/0x1410 fs/jbd2/transaction.c:444 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x3b9/0x970 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x281/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1f5/0xa00 fs/ocfs2/super.c:1825 generic_shutdown_super+0x156/0x390 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1722 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506 [inline] deactivate_super+0xde/0x100 fs/super.c:502 cleanup_mnt+0x225/0x450 fs/namespace.c:1327 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x419/0x4e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x281/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1f5/0xa00 fs/ocfs2/super.c:1825 generic_shutdown_super+0x156/0x390 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1722 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506 [inline] deactivate_super+0xde/0x100 fs/super.c:502 cleanup_mnt+0x225/0x450 fs/namespace.c:1327 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x419/0x4e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#2){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs.h:1915 [inline] sb_start_intwrite include/linux/fs.h:2098 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:370 ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline] ocfs2_truncate_file+0x3ef/0x17c0 fs/ocfs2/file.c:500 ocfs2_setattr+0x1594/0x2560 fs/ocfs2/file.c:1212 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_alloc_sem){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write+0x92/0x200 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xbba/0x17c0 fs/ocfs2/file.c:521 ocfs2_setattr+0x1594/0x2560 fs/ocfs2/file.c:1212 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> jbd2_handle --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle); lock(&oi->ip_xattr_sem); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 3 locks held by syz.9.802/9494: #0: ffff88807eb0e420 (sb_writers#24){.+.+}-{0:0}, at: do_open fs/namei.c:3968 [inline] #0: ffff88807eb0e420 (sb_writers#24){.+.+}-{0:0}, at: path_openat+0x22f4/0x2cb0 fs/namei.c:4134 #1: ffff8880473a42c0 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:984 [inline] #1: ffff8880473a42c0 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: do_truncate+0x146/0x230 fs/open.c:63 #2: ffff8880473a3ff8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0x9f/0x320 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 0 UID: 0 PID: 9494 Comm: syz.9.802 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2043 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x12a6/0x1ce0 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 down_write+0x92/0x200 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xbba/0x17c0 fs/ocfs2/file.c:521 ocfs2_setattr+0x1594/0x2560 fs/ocfs2/file.c:1212 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6a9258eec9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6a93487038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f6a927e6180 RCX: 00007f6a9258eec9 RDX: 0000000000000111 RSI: 000000000014937e RDI: 0000200000000180 RBP: 00007f6a92611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6a927e6218 R14: 00007f6a927e6180 R15: 00007ffd6270bdf8