====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.101/6297 is trying to acquire lock: ffff888076f5bff8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_init_acl+0x30a/0x770 fs/ocfs2/acl.c:366 but task is already holding lock: ffff888031abd8e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a8/0x6f0 fs/ocfs2/journal.c:372 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&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:3539 [inline] open_last_lookups fs/namei.c:3607 [inline] path_openat+0x1705/0x3270 fs/namei.c:3841 do_filp_open+0x1f2/0x430 fs/namei.c:3871 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 -> #3 (sb_internal#3){.+.+}-{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_create_refcount_tree+0x33f/0x11e0 fs/ocfs2/refcounttree.c:577 ocfs2_attach_refcount_tree fs/ocfs2/refcounttree.c:3784 [inline] __ocfs2_reflink+0x4ba/0x16f0 fs/ocfs2/refcounttree.c:4173 ocfs2_reflink+0x4e8/0x920 fs/ocfs2/refcounttree.c:4278 ocfs2_vfs_reflink+0x333/0x450 fs/ocfs2/refcounttree.c:4404 ocfs2_reflink_ioctl+0x3a0/0x450 fs/ocfs2/refcounttree.c:4444 ocfs2_ioctl+0x5b9/0x7e0 fs/ocfs2/ioctl.c:923 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 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 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}: down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804 ocfs2_reserve_new_metadata_blocks+0x416/0x9a0 fs/ocfs2/suballoc.c:1000 ocfs2_create_refcount_tree+0x270/0x11e0 fs/ocfs2/refcounttree.c:571 ocfs2_attach_refcount_tree fs/ocfs2/refcounttree.c:3784 [inline] __ocfs2_reflink+0x4ba/0x16f0 fs/ocfs2/refcounttree.c:4173 ocfs2_reflink+0x4e8/0x920 fs/ocfs2/refcounttree.c:4278 ocfs2_vfs_reflink+0x333/0x450 fs/ocfs2/refcounttree.c:4404 ocfs2_reflink_ioctl+0x3a0/0x450 fs/ocfs2/refcounttree.c:4444 ocfs2_ioctl+0x5b9/0x7e0 fs/ocfs2/ioctl.c:923 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 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 (&oi->ip_alloc_sem){+.+.}-{3:3}: down_write+0x97/0x200 kernel/locking/rwsem.c:1573 ocfs2_reflink+0x4cf/0x920 fs/ocfs2/refcounttree.c:4277 ocfs2_vfs_reflink+0x333/0x450 fs/ocfs2/refcounttree.c:4404 ocfs2_reflink_ioctl+0x3a0/0x450 fs/ocfs2/refcounttree.c:4444 ocfs2_ioctl+0x5b9/0x7e0 fs/ocfs2/ioctl.c:923 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857 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 (&oi->ip_xattr_sem){++++}-{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_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:3539 [inline] open_last_lookups fs/namei.c:3607 [inline] path_openat+0x1705/0x3270 fs/namei.c:3841 do_filp_open+0x1f2/0x430 fs/namei.c:3871 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 other info that might help us debug this: Chain exists of: &oi->ip_xattr_sem --> sb_internal#3 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&journal->j_trans_barrier); lock(sb_internal#3); lock(&journal->j_trans_barrier); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.3.101/6297: #0: ffff888020f02418 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff888076f5c2d8 (&type->i_mutex_dir_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888076f5c2d8 (&type->i_mutex_dir_key#12){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3604 [inline] #1: ffff888076f5c2d8 (&type->i_mutex_dir_key#12){+.+.}-{3:3}, at: path_openat+0x7f4/0x3270 fs/namei.c:3841 #2: ffff888059d46d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #2: ffff888059d46d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804 #3: ffff888059d4ed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #3: ffff888059d4ed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:804 #4: ffff888059d409d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #4: ffff888059d409d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0x120/0x2620 fs/ocfs2/localalloc.c:635 #5: ffff888020f02608 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xf33/0x2310 fs/ocfs2/namei.c:361 #6: ffff888031abd8e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a8/0x6f0 fs/ocfs2/journal.c:372 #7: ffff888058598990 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448 stack backtrace: CPU: 0 PID: 6297 Comm: syz.3.101 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_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:3539 [inline] open_last_lookups fs/namei.c:3607 [inline] path_openat+0x1705/0x3270 fs/namei.c:3841 do_filp_open+0x1f2/0x430 fs/namei.c:3871 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 RIP: 0033:0x7f06e0f9e0d9 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:00007f06e1e28028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f06e1226090 RCX: 00007f06e0f9e0d9 RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c RBP: 00007f06e1035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f06e1226128 R14: 00007f06e1226090 R15: 00007ffcc89bb9e8