loop2: detected capacity change from 0 to 32768 JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.1332/12529 is trying to acquire lock: ffff8880581e8660 (&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: ffff8880581e86f8 (&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_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x2a5/0x470 fs/namei.c:4121 do_mkdirat+0x1dc/0x450 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 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_mknod+0xf33/0x2310 fs/ocfs2/namei.c:361 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:3794 do_filp_open+0x1f2/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 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}: __lock_release kernel/locking/lockdep.c:5468 [inline] lock_release+0x332/0x8c0 kernel/locking/lockdep.c:5774 up_write+0x2d/0x410 kernel/locking/rwsem.c:1625 inode_unlock include/linux/fs.h:809 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x97/0x1a0 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x43f6/0x4480 fs/ocfs2/aops.c:1827 ocfs2_write_begin+0x1bb/0x310 fs/ocfs2/aops.c:1906 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4036 ocfs2_file_write_iter+0x1724/0x1ef0 fs/ocfs2/file.c:2468 call_write_iter include/linux/fs.h:2018 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x474/0x9a0 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __x64_sys_pwrite64+0x198/0x220 fs/read_write.c:706 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 -> #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 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x2a7e/0x3270 fs/namei.c:3797 do_filp_open+0x1f2/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_creat fs/open.c:1514 [inline] __se_sys_creat fs/open.c:1508 [inline] __x64_sys_creat+0x90/0xb0 fs/open.c:1508 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 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 *** 3 locks held by syz.2.1332/12529: #0: ffff88804d5e8418 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff8880581e89d8 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff8880581e89d8 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: do_truncate+0x19c/0x240 fs/open.c:64 #2: ffff8880581e86f8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa5/0x360 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 1 PID: 12529 Comm: syz.2.1332 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x2a7e/0x3270 fs/namei.c:3797 do_filp_open+0x1f2/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_creat fs/open.c:1514 [inline] __se_sys_creat fs/open.c:1508 [inline] __x64_sys_creat+0x90/0xb0 fs/open.c:1508 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 RIP: 0033:0x7ff35839ce59 Code: ff c3 66 2e 0f 1f 84 00 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 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff35933c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ff358615fa0 RCX: 00007ff35839ce59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000240 RBP: 00007ff358432e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff358616038 R14: 00007ff358615fa0 R15: 00007fffd6d47988