====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.225/5407 is trying to acquire lock: ffff88805ab406f8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365 but task is already holding lock: ffff8880563848e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 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+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe0/0x4c0 fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x13c8/0x1750 fs/ocfs2/quota_local.c:764 dquot_load_quota_sb+0x756/0xac0 fs/quota/dquot.c:2492 dquot_load_quota_inode+0x2d8/0x5d0 fs/quota/dquot.c:2529 ocfs2_enable_quotas+0x1c5/0x490 fs/ocfs2/super.c:926 ocfs2_fill_super+0x43b5/0x5090 fs/ocfs2/super.c:1139 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (sb_internal#6){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x2a5/0x6f0 fs/ocfs2/journal.c:372 ocfs2_xattr_set+0xeb3/0x13e0 fs/ocfs2/xattr.c:3647 ocfs2_set_acl+0x4e1/0x590 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x190/0x2b0 fs/ocfs2/acl.c:285 set_posix_acl fs/posix_acl.c:1160 [inline] posix_acl_xattr_set+0x387/0x3f0 fs/posix_acl.c:1189 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216 vfs_setxattr+0x167/0x2e0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x346/0x360 fs/xattr.c:617 path_setxattr+0x147/0x290 fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ocfs2_reserve_suballoc_bits+0x16d/0x4810 fs/ocfs2/suballoc.c:782 ocfs2_reserve_new_metadata_blocks+0x412/0x9a0 fs/ocfs2/suballoc.c:978 ocfs2_init_xattr_set_ctxt+0x314/0x7b0 fs/ocfs2/xattr.c:3281 ocfs2_xattr_set+0xc3b/0x13e0 fs/ocfs2/xattr.c:3638 ocfs2_set_acl+0x4e1/0x590 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x190/0x2b0 fs/ocfs2/acl.c:285 set_posix_acl fs/posix_acl.c:1160 [inline] posix_acl_xattr_set+0x387/0x3f0 fs/posix_acl.c:1189 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216 vfs_setxattr+0x167/0x2e0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x346/0x360 fs/xattr.c:617 path_setxattr+0x147/0x290 fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/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:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365 ocfs2_mknod+0x15e8/0x25b0 fs/ocfs2/namei.c:410 ocfs2_mkdir+0x1b6/0x4b0 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4114 do_mkdirat+0x1d8/0x440 fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4152 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/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#6 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#6); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.2.225/5407: #0: ffff888052718460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402 #1: ffff88805ab409c8 (&type->i_mutex_dir_key#19/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff88805ab409c8 (&type->i_mutex_dir_key#19/1){+.+.}-{3:3}, at: filename_create+0x208/0x470 fs/namei.c:3884 #2: ffff88804c0e6d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff88804c0e6d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4810 fs/ocfs2/suballoc.c:782 #3: ffff88804c0e5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #3: ffff88804c0e5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4810 fs/ocfs2/suballoc.c:782 #4: ffff888070352648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #4: ffff888070352648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0x11e/0x2700 fs/ocfs2/localalloc.c:635 #5: ffff888052718650 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_mknod+0xf77/0x25b0 fs/ocfs2/namei.c:361 #6: ffff8880563848e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a4/0x6f0 fs/ocfs2/journal.c:374 #7: ffff88804b642990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x200f/0x2230 fs/jbd2/transaction.c:463 stack backtrace: CPU: 1 PID: 5407 Comm: syz.2.225 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365 ocfs2_mknod+0x15e8/0x25b0 fs/ocfs2/namei.c:410 ocfs2_mkdir+0x1b6/0x4b0 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4114 do_mkdirat+0x1d8/0x440 fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4152 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f1da539bcc7 Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f1da61e7e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f1da61e7ee0 RCX: 00007f1da539bcc7 RDX: 00000000000001ff RSI: 00002000000000c0 RDI: 00000000ffffff9c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007f1da61e7ea0 R14: 0000000000000000 R15: 0000000000000000