======================================================
WARNING: possible circular locking dependency detected
6.16.0-syzkaller-11895-gcca7a0aae895 #0 Not tainted
------------------------------------------------------
syz.2.581/8667 is trying to acquire lock:
ffff888108264f78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f9/0x720

but task is already holding lock:
ffff8881182fa950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (jbd2_handle){++++}-{0:0}:
       lock_acquire+0x120/0x360
       start_this_handle+0x1fa7/0x21c0
       jbd2__journal_start+0x2c1/0x5b0
       jbd2_journal_start+0x2a/0x40
       ocfs2_start_trans+0x376/0x6d0
       ocfs2_mknod+0xe93/0x2050
       ocfs2_mkdir+0x191/0x440
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x247/0x590
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       ocfs2_start_trans+0x36a/0x6d0
       ocfs2_mknod+0xe93/0x2050
       ocfs2_mkdir+0x191/0x440
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x247/0x590
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (sb_internal#2){.+.+}-{0:0}:
       lock_acquire+0x120/0x360
       ocfs2_start_trans+0x26b/0x6d0
       ocfs2_mknod+0xe93/0x2050
       ocfs2_mkdir+0x191/0x440
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x247/0x590
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360
       down_write+0x96/0x1f0
       ocfs2_reserve_suballoc_bits+0x15e/0x4640
       ocfs2_reserve_clusters_with_limit+0x2fb/0xba0
       ocfs2_mknod+0xe32/0x2050
       ocfs2_mkdir+0x191/0x440
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x247/0x590
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360
       down_write+0x96/0x1f0
       ocfs2_reserve_suballoc_bits+0x15e/0x4640
       ocfs2_reserve_new_metadata_blocks+0x403/0x940
       ocfs2_init_xattr_set_ctxt+0x307/0x700
       ocfs2_xattr_set+0xb70/0x11f0
       __vfs_setxattr+0x43c/0x480
       __vfs_setxattr_noperm+0x12d/0x660
       vfs_setxattr+0x16b/0x2f0
       ovl_get_workdir+0xc09/0x17c0
       ovl_fill_super+0x1365/0x35b0
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2b0
       do_new_mount+0x2a2/0x9e0
       __se_sys_mount+0x317/0x410
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       ocfs2_init_acl+0x2f9/0x720
       ocfs2_mknod+0x1321/0x2050
       ocfs2_create+0x1a5/0x440
       path_openat+0x14f4/0x3830
       do_filp_open+0x1fa/0x410
       filp_open+0x176/0x1d0
       coredump_file+0x33e/0xaf0
       vfs_coredump+0x16b1/0x2ab0
       get_signal+0x1109/0x1340
       arch_do_signal_or_restart+0x9a/0x750
       irqentry_exit_to_user_mode+0x81/0x120
       exc_page_fault+0x9f/0xf0
       asm_exc_page_fault+0x26/0x30

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(jbd2_handle);
                               lock(&journal->j_trans_barrier);
                               lock(jbd2_handle);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

8 locks held by syz.2.581/8667:
 #0: ffff888118f72428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888108265240 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: path_openat+0x8da/0x3830
 #2: ffff8881186f09c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #3: ffff8881186f60c0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #4: ffff888125c209c0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0
 #5: ffff888118f72618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0xe93/0x2050
 #6: ffff8881175df4e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0
 #7: ffff8881182fa950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

stack backtrace:
CPU: 1 UID: 0 PID: 8667 Comm: syz.2.581 Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 down_read+0x46/0x2e0
 ocfs2_init_acl+0x2f9/0x720
 ocfs2_mknod+0x1321/0x2050
 ocfs2_create+0x1a5/0x440
 path_openat+0x14f4/0x3830
 do_filp_open+0x1fa/0x410
 filp_open+0x176/0x1d0
 coredump_file+0x33e/0xaf0
 vfs_coredump+0x16b1/0x2ab0
 get_signal+0x1109/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 irqentry_exit_to_user_mode+0x81/0x120
 exc_page_fault+0x9f/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f7f6498ebf1
Code: 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffff0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f7f64bb5fa0 RCX: 00007f7f6498ebe9
RDX: 0000000000000000 RSI: fffffffffffffff0 RDI: 0000000020042400
RBP: 00007f7f64a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f7f64bb6038 R14: 00007f7f64bb5fa0 R15: 00007ffd28037ed8
 </TASK>
ocfs2: Unmounting device (7,2) on (node local)
