====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.278/5870 is trying to acquire lock: ffff88805ed36a20 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xb3/0x340 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff88805ed36ab8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa1/0x340 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+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365 ocfs2_mknod+0x15cb/0x2510 fs/ocfs2/namei.c:410 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4111 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 ocfs2_mknod+0xf5a/0x2510 fs/ocfs2/namei.c:361 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x11db/0x2fa0 fs/namei.c:3747 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (sb_internal#2){.+.+}-{0:0}: __lock_release kernel/locking/lockdep.c:5339 [inline] lock_release+0x321/0x8a0 kernel/locking/lockdep.c:5643 up_write+0x29/0x420 kernel/locking/rwsem.c:1603 inode_unlock include/linux/fs.h:792 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x93/0x1a0 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x4382/0x4400 fs/ocfs2/aops.c:1826 ocfs2_write_begin+0x1b9/0x310 fs/ocfs2/aops.c:1905 generic_perform_write+0x2b6/0x550 mm/filemap.c:3785 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912 ocfs2_file_write_iter+0x1670/0x1e70 fs/ocfs2/file.c:2472 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x745/0xd60 fs/read_write.c:594 ksys_pwrite64 fs/read_write.c:701 [inline] __do_sys_pwrite64 fs/read_write.c:711 [inline] __se_sys_pwrite64 fs/read_write.c:708 [inline] __x64_sys_pwrite64+0x19a/0x220 fs/read_write.c:708 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&oi->ip_alloc_sem){++++}-{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+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_try_remove_refcount_tree+0xb3/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe03/0x1460 fs/ocfs2/file.c:517 ocfs2_setattr+0x14dd/0x1ad0 fs/ocfs2/file.c:1215 notify_change+0xbcd/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:65 do_coredump+0x272d/0x2ac0 fs/coredump.c:871 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_general_protection+0x1e4/0x270 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:600 other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> &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(&oi->ip_alloc_sem); *** DEADLOCK *** 2 locks held by syz.3.278/5870: #0: ffff88805ed36d88 (&sb->s_type->i_mutex_key#25){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff88805ed36d88 (&sb->s_type->i_mutex_key#25){+.+.}-{3:3}, at: do_truncate+0x198/0x240 fs/open.c:63 #1: ffff88805ed36ab8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa1/0x340 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 0 PID: 5870 Comm: syz.3.278 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 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+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_try_remove_refcount_tree+0xb3/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xe03/0x1460 fs/ocfs2/file.c:517 ocfs2_setattr+0x14dd/0x1ad0 fs/ocfs2/file.c:1215 notify_change+0xbcd/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:65 do_coredump+0x272d/0x2ac0 fs/coredump.c:871 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_general_protection+0x1e4/0x270 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:600 RIP: 0033:0x7f28ff62c821 Code: 00 00 00 00 0f 1f 44 00 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000200000000130 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f28ff8a5fa0 RCX: 00007f28ff62c819 RDX: 0000200000000140 RSI: 0000200000000130 RDI: 0000000000000080 RBP: 00007f28ff6c2c91 R08: 00002000000001c0 R09: 00002000000001c0 R10: 0000200000000180 R11: 0000000000000202 R12: 0000000000000000 R13: 00007f28ff8a6038 R14: 00007f28ff8a5fa0 R15: 00007ffca2e0a4e8 ocfs2: Unmounting device (7,3) on (node local)