EXT4-fs (loop1): encrypted files will use data=ordered instead of data journaling mode
EXT4-fs (loop1): mounted filesystem with journalled data mode. Quota mode: journalled.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.930/8149 is trying to acquire lock:
ffff0000e212c268 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_acquire+0x60/0x4b8 fs/quota/dquot.c:488

but task is already holding lock:
ffff0000d1e4c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (jbd2_handle){++++}-{0:0}:
       wait_transaction_locked+0x184/0x23c fs/jbd2/transaction.c:177
       add_transaction_credits+0x104/0xaf0 fs/jbd2/transaction.c:-1
       start_this_handle+0x4dc/0x125c fs/jbd2/transaction.c:422
       jbd2__journal_start+0x288/0x530 fs/jbd2/transaction.c:520
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:559
       ocfs2_start_trans+0x398/0x6f4 fs/ocfs2/journal.c:376
       ocfs2_write_begin_nolock+0x2368/0x3a80 fs/ocfs2/aops.c:1772
       __ocfs2_page_mkwrite fs/ocfs2/mmap.c:92 [inline]
       ocfs2_page_mkwrite+0x5b0/0xbfc fs/ocfs2/mmap.c:143
       do_page_mkwrite+0x140/0x35c mm/memory.c:3009
       wp_page_shared+0x14c/0x544 mm/memory.c:3358
       do_wp_page+0xc88/0xed4 mm/memory.c:3508
       handle_pte_fault mm/memory.c:5047 [inline]
       __handle_mm_fault mm/memory.c:5171 [inline]
       handle_mm_fault+0x1520/0x3018 mm/memory.c:5292
       __do_page_fault arch/arm64/mm/fault.c:506 [inline]
       do_page_fault+0x310/0xa5c arch/arm64/mm/fault.c:590
       do_mem_abort+0x70/0x198 arch/arm64/mm/fault.c:811
       el1_abort+0x48/0x6c arch/arm64/kernel/entry-common.c:367
       el1h_64_sync_handler+0x50/0xac arch/arm64/kernel/entry-common.c:427
       el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:584
       __arch_copy_to_user+0x190/0x234 arch/arm64/lib/copy_template.S:158
       copy_page_to_iter+0x22c/0x358 lib/iov_iter.c:725
       copy_folio_to_iter include/linux/uio.h:172 [inline]
       filemap_read+0x1a8c/0x20dc mm/filemap.c:2819
       generic_file_read_iter+0xf8/0x5ac mm/filemap.c:2941
       ocfs2_file_read_iter+0x428/0xb98 fs/ocfs2/file.c:2589
       call_read_iter include/linux/fs.h:2265 [inline]
       new_sync_read fs/read_write.c:389 [inline]
       vfs_read+0x3cc/0x7b8 fs/read_write.c:470
       ksys_read+0x12c/0x228 fs/read_write.c:613
       __do_sys_read fs/read_write.c:623 [inline]
       __se_sys_read fs/read_write.c:621 [inline]
       __arm64_sys_read+0x7c/0x90 fs/read_write.c:621
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589

-> #3 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0x64/0x300 kernel/locking/rwsem.c:1520
       ocfs2_start_trans+0x38c/0x6f4 fs/ocfs2/journal.c:374
       ocfs2_mknod+0xd20/0x212c fs/ocfs2/namei.c:361
       ocfs2_create+0x19c/0x51c fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3533 [inline]
       open_last_lookups fs/namei.c:3601 [inline]
       path_openat+0xda8/0x27a0 fs/namei.c:3835
       do_filp_open+0x198/0x38c fs/namei.c:3865
       do_sys_openat2+0x134/0x3fc fs/open.c:1320
       do_sys_open fs/open.c:1336 [inline]
       __do_sys_openat fs/open.c:1352 [inline]
       __se_sys_openat fs/open.c:1347 [inline]
       __arm64_sys_openat+0x11c/0x150 fs/open.c:1347
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589

-> #2 (sb_internal#4){.+.+}-{0:0}:
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1897 [inline]
       sb_start_intwrite include/linux/fs.h:2019 [inline]
       ocfs2_start_trans+0x20c/0x6f4 fs/ocfs2/journal.c:372
       ocfs2_acquire_dquot+0x5d0/0xab0 fs/ocfs2/quota_global.c:848
       dqget+0x638/0xa98 fs/quota/dquot.c:1013
       dquot_set_dqblk+0x40/0xe34 fs/quota/dquot.c:2858
       quota_setquota+0x41c/0x4cc fs/quota/quota.c:310
       do_quotactl+0x65c/0x738 fs/quota/quota.c:802
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl fs/quota/quota.c:916 [inline]
       __arm64_sys_quotactl+0x2dc/0x77c fs/quota/quota.c:916
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589

-> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
       ocfs2_create_local_dquot+0x140/0x1444 fs/ocfs2/quota_local.c:1224
       ocfs2_acquire_dquot+0x6dc/0xab0 fs/ocfs2/quota_global.c:871
       dqget+0x638/0xa98 fs/quota/dquot.c:1013
       dquot_set_dqblk+0x40/0xe34 fs/quota/dquot.c:2858
       quota_setquota+0x41c/0x4cc fs/quota/quota.c:310
       do_quotactl+0x65c/0x738 fs/quota/quota.c:802
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl fs/quota/quota.c:916 [inline]
       __arm64_sys_quotactl+0x2dc/0x77c fs/quota/quota.c:916
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589

-> #0 (&dquot->dq_lock){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3162 [inline]
       check_prevs_add kernel/locking/lockdep.c:3281 [inline]
       validate_chain kernel/locking/lockdep.c:3897 [inline]
       __lock_acquire+0x3504/0x7280 kernel/locking/lockdep.c:5171
       lock_acquire+0x210/0x63c kernel/locking/lockdep.c:5790
       __mutex_lock_common+0x1a0/0x1f88 kernel/locking/mutex.c:603
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
       dquot_acquire+0x60/0x4b8 fs/quota/dquot.c:488
       ext4_acquire_dquot+0x270/0x420 fs/ext4/super.c:6844
       dqget+0x638/0xa98 fs/quota/dquot.c:1013
       __dquot_initialize+0x2e4/0xb30 fs/quota/dquot.c:1542
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1604
       ext4_xattr_set+0xbc/0x2b4 fs/ext4/xattr.c:2489
       ext4_xattr_security_set+0x4c/0x64 fs/ext4/xattr_security.c:31
       __vfs_setxattr+0x374/0x390 fs/xattr.c:182
       __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216
       __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277
       vfs_setxattr+0x158/0x2a8 fs/xattr.c:309
       do_setxattr fs/xattr.c:594 [inline]
       setxattr+0x258/0x2d8 fs/xattr.c:617
       path_setxattr+0x130/0x260 fs/xattr.c:636
       __do_sys_lsetxattr fs/xattr.c:659 [inline]
       __se_sys_lsetxattr fs/xattr.c:655 [inline]
       __arm64_sys_lsetxattr+0xc4/0xe0 fs/xattr.c:655
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589

other info that might help us debug this:

Chain exists of:
  &dquot->dq_lock --> &journal->j_trans_barrier --> jbd2_handle

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(jbd2_handle);
                               lock(&journal->j_trans_barrier);
                               lock(jbd2_handle);
  lock(&dquot->dq_lock);

 *** DEADLOCK ***

3 locks held by syz.1.930/8149:
 #0: ffff0000d30c2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
 #1: ffff0000f6114030 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #1: ffff0000f6114030 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:308
 #2: ffff0000d1e4c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461

stack backtrace:
CPU: 0 PID: 8149 Comm: syz.1.930 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
dump_backtrace(regs = 0000000000000000 tsk = 0000000000000000)
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2088
 check_noncircular+0x290/0x370 kernel/locking/lockdep.c:2215
 check_prev_add kernel/locking/lockdep.c:3162 [inline]
 check_prevs_add kernel/locking/lockdep.c:3281 [inline]
 validate_chain kernel/locking/lockdep.c:3897 [inline]
 __lock_acquire+0x3504/0x7280 kernel/locking/lockdep.c:5171
 lock_acquire+0x210/0x63c kernel/locking/lockdep.c:5790
 __mutex_lock_common+0x1a0/0x1f88 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 dquot_acquire+0x60/0x4b8 fs/quota/dquot.c:488
 ext4_acquire_dquot+0x270/0x420 fs/ext4/super.c:6844
 dqget+0x638/0xa98 fs/quota/dquot.c:1013
 __dquot_initialize+0x2e4/0xb30 fs/quota/dquot.c:1542
 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1604
 ext4_xattr_set+0xbc/0x2b4 fs/ext4/xattr.c:2489
 ext4_xattr_security_set+0x4c/0x64 fs/ext4/xattr_security.c:31
 __vfs_setxattr+0x374/0x390 fs/xattr.c:182
 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216
 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277
 vfs_setxattr+0x158/0x2a8 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x258/0x2d8 fs/xattr.c:617
 path_setxattr+0x130/0x260 fs/xattr.c:636
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __arm64_sys_lsetxattr+0xc4/0xe0 fs/xattr.c:655
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589
aio_setup_ring: pid(8149) page[0]->count=3
aio_setup_ring: pid(8149) page[1]->count=3
aio_setup_ring: pid(8149) page[2]->count=3
aio_setup_ring: pid(8149) page[3]->count=2
aio_setup_ring: pid(8149) page[4]->count=3
aio_setup_ring: pid(8149) page[5]->count=3
aio_setup_ring: pid(8149) page[6]->count=3
aio_setup_ring: pid(8149) page[7]->count=3
aio_setup_ring: pid(8149) page[8]->count=3
aio_setup_ring: pid(8149) page[9]->count=3
aio_setup_ring: pid(8149) page[10]->count=3
aio_setup_ring: pid(8149) page[11]->count=3
aio_setup_ring: pid(8149) page[12]->count=3
aio_setup_ring: pid(8149) page[13]->count=3
aio_setup_ring: pid(8149) page[14]->count=3
aio_setup_ring: pid(8149) page[15]->count=3
aio_setup_ring: pid(8149) page[16]->count=3
aio_setup_ring: pid(8149) page[17]->count=3
aio_setup_ring: pid(8149) page[18]->count=3
aio_setup_ring: pid(8149) page[19]->count=3
aio_setup_ring: pid(8149) page[20]->count=3
aio_setup_ring: pid(8149) page[21]->count=3
aio_setup_ring: pid(8149) page[22]->count=3
aio_setup_ring: pid(8149) page[23]->count=3
aio_setup_ring: pid(8149) page[24]->count=3
aio_setup_ring: pid(8149) page[25]->count=3
aio_setup_ring: pid(8149) page[26]->count=3
aio_setup_ring: pid(8149) page[27]->count=3
aio_setup_ring: pid(8149) page[28]->count=3
aio_setup_ring: pid(8149) page[29]->count=3
aio_setup_ring: pid(8149) page[30]->count=3
aio_setup_ring: pid(8149) page[31]->count=3
aio_setup_ring: pid(8149) page[32]->count=3
aio_setup_ring: pid(8149) page[33]->count=3
aio_setup_ring: pid(8149) page[34]->count=2
aio_setup_ring: pid(8149) page[35]->count=3
aio_setup_ring: pid(8149) page[36]->count=3
aio_setup_ring: pid(8149) page[37]->count=3
aio_setup_ring: pid(8149) page[38]->count=3
aio_setup_ring: pid(8149) page[39]->count=3
aio_setup_ring: pid(8149) page[40]->count=3
aio_setup_ring: pid(8149) page[41]->count=3
aio_setup_ring: pid(8149) page[42]->count=3
aio_setup_ring: pid(8149) page[43]->count=3
aio_setup_ring: pid(8149) page[44]->count=3
aio_setup_ring: pid(8149) page[45]->count=3
aio_setup_ring: pid(8149) page[46]->count=3
aio_setup_ring: pid(8149) page[47]->count=3
aio_setup_ring: pid(8149) page[48]->count=3
aio_setup_ring: pid(8149) page[49]->count=2
aio_setup_ring: pid(8149) page[50]->count=3
aio_setup_ring: pid(8149) page[51]->count=3
aio_setup_ring: pid(8149) page[52]->count=3
aio_setup_ring: pid(8149) page[53]->count=3
aio_setup_ring: pid(8149) page[54]->count=3
aio_setup_ring: pid(8149) page[55]->count=3
aio_setup_ring: pid(8149) page[56]->count=3
aio_setup_ring: pid(8149) page[57]->count=3
aio_setup_ring: pid(8149) page[58]->count=3
aio_setup_ring: pid(8149) page[59]->count=3
aio_setup_ring: pid(8149) page[60]->count=3
aio_setup_ring: pid(8149) page[61]->count=3
aio_setup_ring: pid(8149) page[62]->count=3
aio_setup_ring: pid(8149) page[63]->count=2
aio_setup_ring: pid(8149) page[64]->count=3
aio_setup_ring: pid(8149) page[65]->count=3
aio_setup_ring: pid(8149) page[66]->count=3
aio_setup_ring: pid(8149) page[67]->count=3
aio_setup_ring: pid(8149) page[68]->count=2
aio_setup_ring: pid(8149) page[69]->count=3
aio_setup_ring: pid(8149) page[70]->count=3
aio_setup_ring: pid(8149) page[71]->count=3
aio_setup_ring: pid(8149) page[72]->count=2
aio_setup_ring: pid(8149) page[73]->count=3
aio_setup_ring: pid(8149) page[74]->count=3
aio_setup_ring: pid(8149) page[75]->count=3
aio_setup_ring: pid(8149) page[76]->count=2
aio_setup_ring: pid(8149) page[77]->count=3
aio_setup_ring: pid(8149) page[78]->count=3
aio_setup_ring: pid(8149) page[79]->count=3
aio_setup_ring: pid(8149) page[80]->count=3
aio_setup_ring: pid(8149) page[81]->count=3
aio_setup_ring: pid(8149) page[82]->count=3
aio_setup_ring: pid(8149) page[83]->count=3
aio_setup_ring: pid(8149) page[84]->count=3
aio_setup_ring: pid(8149) page[85]->count=3
aio_setup_ring: pid(8149) page[86]->count=3
aio_setup_ring: pid(8149) page[87]->count=3
aio_setup_ring: pid(8149) page[88]->count=3
aio_setup_ring: pid(8149) page[89]->count=3
aio_setup_ring: pid(8149) page[90]->count=3
aio_setup_ring: pid(8149) page[91]->count=3
aio_setup_ring: pid(8149) page[92]->count=3
aio_setup_ring: pid(8149) page[93]->count=3
aio_setup_ring: pid(8149) page[94]->count=3
aio_setup_ring: pid(8149) page[95]->count=2
aio_setup_ring: pid(8149) page[96]->count=3
aio_setup_ring: pid(8149) page[97]->count=3
aio_setup_ring: pid(8149) page[98]->count=3
aio_setup_ring: pid(8149) page[99]->count=3
aio_setup_ring: pid(8149) page[100]->count=3
aio_setup_ring: pid(8149) page[101]->count=3
aio_setup_ring: pid(8149) page[102]->count=3
aio_setup_ring: pid(8149) page[103]->count=3
aio_setup_ring: pid(8149) page[104]->count=3
aio_setup_ring: pid(8149) page[105]->count=3
aio_setup_ring: pid(8149) page[106]->count=3
aio_setup_ring: pid(8149) page[107]->count=3
aio_setup_ring: pid(8149) page[108]->count=3
aio_setup_ring: pid(8149) page[109]->count=3
aio_setup_ring: pid(8149) page[110]->count=2
aio_setup_ring: pid(8149) page[111]->count=3
aio_setup_ring: pid(8149) page[112]->count=3
aio_setup_ring: pid(8149) page[113]->count=3
aio_setup_ring: pid(8149) page[114]->count=3
aio_setup_ring: pid(8149) page[115]->count=3
aio_setup_ring: pid(8149) page[116]->count=3
aio_setup_ring: pid(8149) page[117]->count=3
aio_setup_ring: pid(8149) page[118]->count=3
aio_setup_ring: pid(8149) page[119]->count=3
aio_setup_ring: pid(8149) page[120]->count=3
aio_setup_ring: pid(8149) page[121]->count=3
aio_setup_ring: pid(8149) page[122]->count=3
aio_setup_ring: pid(8149) page[123]->count=3
aio_setup_ring: pid(8149) page[124]->count=3
aio_setup_ring: pid(8149) page[125]->count=2
aio_setup_ring: pid(8149) page[126]->count=3
aio_setup_ring: pid(8149) page[127]->count=3
aio_setup_ring: pid(8149) page[128]->count=3
aio_setup_ring: pid(8149) page[129]->count=3
aio_setup_ring: pid(8149) page[130]->count=3
aio_setup_ring: pid(8149) page[131]->count=3
aio_setup_ring: attempting mmap of 540672 bytes
aio_setup_ring: mmap address: 0xffff996a2000
ioctx_alloc: allocated ioctx 000000008a449e0b[281473255612416]: mm=00000000b54daf2a mask=0x41ff
kcov: kcov_task_exit: t = ffff0000dd375400, kcov->t = ffff0000dd375400