====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.352/6904 is trying to acquire lock: ffff88805cfea378 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_init_acl+0x30a/0x770 fs/ocfs2/acl.c:366 but task is already holding lock: ffff88805bc358e8 (&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: -> #3 (&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_fileattr_set+0x2ff/0x800 fs/ocfs2/ioctl.c:119 vfs_fileattr_set+0x85d/0xb10 fs/ioctl.c:697 ioctl_fssetxattr fs/ioctl.c:759 [inline] do_vfs_ioctl+0x13fa/0x1cc0 fs/ioctl.c:846 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (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_write_begin_inline fs/ocfs2/aops.c:1481 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1584 [inline] ocfs2_write_begin_nolock+0x205e/0x43f0 fs/ocfs2/aops.c:1670 ocfs2_write_begin+0x1c6/0x320 fs/ocfs2/aops.c:1904 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4031 ocfs2_file_write_iter+0x167a/0x1e80 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+0x46c/0x990 fs/read_write.c:584 ksys_write+0x150/0x260 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 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_try_remove_refcount_tree+0xb7/0x340 fs/ocfs2/refcounttree.c:932 ocfs2_truncate_file+0xde5/0x1440 fs/ocfs2/file.c:521 ocfs2_setattr+0x158d/0x1bc0 fs/ocfs2/file.c:1211 notify_change+0xb0d/0xe10 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+0x2a32/0x3230 fs/namei.c:3797 do_filp_open+0x1f5/0x430 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+0x55/0xa0 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+0x2df1/0x7d40 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+0x140f/0x2300 fs/ocfs2/namei.c:410 vfs_mknod+0x32b/0x360 fs/namei.c:3999 do_mknodat+0x386/0x500 fs/namei.c:-1 __do_sys_mknod fs/namei.c:4082 [inline] __se_sys_mknod fs/namei.c:4080 [inline] __x64_sys_mknod+0x8e/0xa0 fs/namei.c:4080 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 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.0.352/6904: #0: ffff88807e210418 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #1: ffff88805cfea658 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline] #1: ffff88805cfea658 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: filename_create+0x20c/0x480 fs/namei.c:3890 #2: ffff88805ccbdf58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #2: ffff88805ccbdf58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16e/0x44c0 fs/ocfs2/suballoc.c:782 #3: ffff88805ccbed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #3: ffff88805ccbed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16e/0x44c0 fs/ocfs2/suballoc.c:782 #4: ffff88805ccbb498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #4: ffff88805ccbb498 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0x120/0x2600 fs/ocfs2/localalloc.c:635 #5: ffff88807e210608 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xf1d/0x2300 fs/ocfs2/namei.c:361 #6: ffff88805bc358e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a8/0x6f0 fs/ocfs2/journal.c:372 #7: ffff888079e26990 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1f7a/0x21c0 fs/jbd2/transaction.c:448 stack backtrace: CPU: 0 PID: 6904 Comm: syz.0.352 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 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+0x2df1/0x7d40 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+0x140f/0x2300 fs/ocfs2/namei.c:410 vfs_mknod+0x32b/0x360 fs/namei.c:3999 do_mknodat+0x386/0x500 fs/namei.c:-1 __do_sys_mknod fs/namei.c:4082 [inline] __se_sys_mknod fs/namei.c:4080 [inline] __x64_sys_mknod+0x8e/0xa0 fs/namei.c:4080 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f838019c799 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:00007f8380fd8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 00007f8380415fa0 RCX: 00007f838019c799 RDX: 0000000000000701 RSI: 000000000000c000 RDI: 0000200000000080 RBP: 00007f8380232c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8380416038 R14: 00007f8380415fa0 R15: 00007ffd91ddd4d8