====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.150/6422 is trying to acquire lock: ffff88805e903120 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xb7/0x360 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff88805e9031b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa5/0x360 fs/ocfs2/refcounttree.c:931 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&oi->ip_xattr_sem){++++}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x30a/0x770 fs/ocfs2/acl.c:366 ocfs2_mknod+0x1427/0x2310 fs/ocfs2/namei.c:410 ocfs2_create+0x196/0x430 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3496 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0x1705/0x3270 fs/namei.c:3798 do_filp_open+0x1f2/0x430 fs/namei.c:3828 do_sys_openat2+0x134/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x3a8/0x6f0 fs/ocfs2/journal.c:372 ocfs2_modify_bh+0xe4/0x4c0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x1433/0x17d0 fs/ocfs2/quota_local.c:764 dquot_load_quota_sb+0x734/0xb30 fs/quota/dquot.c:2492 dquot_load_quota_inode+0x2d7/0x5c0 fs/quota/dquot.c:2529 ocfs2_enable_quotas+0x1c4/0x4a0 fs/ocfs2/super.c:926 ocfs2_fill_super+0x416d/0x5010 fs/ocfs2/super.c:1141 mount_bdev+0x21c/0x2c0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24a/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (sb_internal#4){.+.+}-{0:0} : percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1633 [inline] sb_start_intwrite include/linux/fs.h:1755 [inline] ocfs2_start_trans+0x2a9/0x6f0 fs/ocfs2/journal.c:370 ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline] ocfs2_truncate_file+0x645/0x1530 fs/ocfs2/file.c:500 ocfs2_setattr+0x15b8/0x1bf0 fs/ocfs2/file.c:1211 notify_change+0xb05/0xde0 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 do_coredump+0x21a9/0x24a0 fs/coredump.c:810 get_signal+0x10da/0x1390 kernel/signal.c:2897 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608 -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{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+0x37ef/0x7d80 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb7/0x360 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe87/0x1530 fs/ocfs2/file.c:521 ocfs2_setattr+0x15b8/0x1bf0 fs/ocfs2/file.c:1211 notify_change+0xb05/0xde0 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 do_coredump+0x21a9/0x24a0 fs/coredump.c:810 get_signal+0x10da/0x1390 kernel/signal.c:2897 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608 other info that might help us debug this: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 2 locks held by syz.2.150/6422: #0: ffff88805e903498 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #0: ffff88805e903498 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: do_truncate+0x19c/0x240 fs/open.c:64 #1: ffff88805e9031b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa5/0x360 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 0 PID: 6422 Comm: syz.2.150 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/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+0x37ef/0x7d80 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb7/0x360 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe87/0x1530 fs/ocfs2/file.c:521 ocfs2_setattr+0x15b8/0x1bf0 fs/ocfs2/file.c:1211 notify_change+0xb05/0xde0 fs/attr.c:499 do_truncate+0x1b0/0x240 fs/open.c:66 do_coredump+0x21a9/0x24a0 fs/coredump.c:810 get_signal+0x10da/0x1390 kernel/signal.c:2897 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:0000200000000108 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f2264226090 RCX: 00007f2263f9e019 RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000004200000 RBP: 00007f226403500c R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f2264226128 R14: 00007f2264226090 R15: 00007ffea8259268 ocfs2: Unmounting device (7,2) on (node local)