syzbot

JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.17/6754 is trying to acquire lock:
ffff0000c8180610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline]
ffff0000c8180610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_truncate_file+0x5b0/0x12f4 fs/ocfs2/file.c:500

but task is already holding lock:
ffff0000f5194da0 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_truncate_file+0x30c/0x12f4 fs/ocfs2/file.c:471

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_alloc_sem){++++}-{4:4}:
       down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
       ocfs2_xattr_ibody_find+0x100/0x668 fs/ocfs2/xattr.c:2689
       ocfs2_xattr_set_handle+0x2bc/0x5e4 fs/ocfs2/xattr.c:3503
       ocfs2_init_security_set+0xb4/0xd8 fs/ocfs2/xattr.c:7307
       ocfs2_mknod+0x106c/0x1cf0 fs/ocfs2/namei.c:422
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3796 [inline]
       open_last_lookups fs/namei.c:3895 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4131
       do_filp_open+0x18c/0x36c fs/namei.c:4161
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
       ocfs2_init_acl+0x258/0x5f0 fs/ocfs2/acl.c:366
       ocfs2_mknod+0x1028/0x1cf0 fs/ocfs2/namei.c:413
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3796 [inline]
       open_last_lookups fs/namei.c:3895 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4131
       do_filp_open+0x18c/0x36c fs/namei.c:4161
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #2 (jbd2_handle){++++}-{0:0}:
       start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444
       jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540
       ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374
       ocfs2_mknod+0xc50/0x1cf0 fs/ocfs2/namei.c:364
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3796 [inline]
       open_last_lookups fs/namei.c:3895 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4131
       do_filp_open+0x18c/0x36c fs/namei.c:4161
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
       ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372
       ocfs2_mknod+0xc50/0x1cf0 fs/ocfs2/namei.c:364
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3796 [inline]
       open_last_lookups fs/namei.c:3895 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4131
       do_filp_open+0x18c/0x36c fs/namei.c:4161
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #0 (sb_internal#2){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237
       lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
       __sb_start_write include/linux/fs.h:1916 [inline]
       sb_start_intwrite include/linux/fs.h:2099 [inline]
       ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
       ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline]
       ocfs2_truncate_file+0x5b0/0x12f4 fs/ocfs2/file.c:500
       ocfs2_setattr+0x1148/0x17a0 fs/ocfs2/file.c:1212
       notify_change+0xa0c/0xcb8 fs/attr.c:546
       do_truncate+0x198/0x210 fs/open.c:68
       handle_truncate fs/namei.c:3596 [inline]
       do_open fs/namei.c:3979 [inline]
       path_openat+0x25a0/0x2c40 fs/namei.c:4134
       do_filp_open+0x18c/0x36c fs/namei.c:4161
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

other info that might help us debug this:

Chain exists of:
  sb_internal#2 --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_alloc_sem);
                               lock(&oi->ip_xattr_sem);
                               lock(&oi->ip_alloc_sem);
  rlock(sb_internal#2);

 *** DEADLOCK ***

3 locks held by syz.0.17/6754:
 #0: ffff0000c8180420 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:508
 #1: ffff0000f5195100 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:985 [inline]
 #1: ffff0000f5195100 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: do_truncate+0x164/0x210 fs/open.c:63
 #2: ffff0000f5194da0 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_truncate_file+0x30c/0x12f4 fs/ocfs2/file.c:471

stack backtrace:
CPU: 0 UID: 0 PID: 6754 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043
 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
 percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 __sb_start_write include/linux/fs.h:1916 [inline]
 sb_start_intwrite include/linux/fs.h:2099 [inline]
 ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
 ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline]
 ocfs2_truncate_file+0x5b0/0x12f4 fs/ocfs2/file.c:500
 ocfs2_setattr+0x1148/0x17a0 fs/ocfs2/file.c:1212
 notify_change+0xa0c/0xcb8 fs/attr.c:546
 do_truncate+0x198/0x210 fs/open.c:68
 handle_truncate fs/namei.c:3596 [inline]
 do_open fs/namei.c:3979 [inline]
 path_openat+0x25a0/0x2c40 fs/namei.c:4134
 do_filp_open+0x18c/0x36c fs/namei.c:4161
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1463
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596