ocfs2: Mounting device (7,1) on (node local, slot 0) with writeback data mode.
======================================================
WARNING: possible circular locking dependency detected
6.1.131-syzkaller #0 Not tainted
------------------------------------------------------
syz.1.145/5009 is trying to acquire lock:
ffff0000e18a0660 (&oi->ip_alloc_sem/1){+.+.}-{3:3}, at: ocfs2_remap_file_range+0x3dc/0x794 fs/ocfs2/file.c:2695
but task is already holding lock:
ffff0000f45414a0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_remap_file_range+0x3c4/0x794 fs/ocfs2/file.c:2693
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}:
down_read+0x64/0x308 kernel/locking/rwsem.c:1520
ocfs2_read_virt_blocks+0x2bc/0x9f8 fs/ocfs2/extent_map.c:976
ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline]
ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline]
ocfs2_find_entry+0x3d0/0x23c4 fs/ocfs2/dir.c:1091
ocfs2_find_files_on_disk+0x130/0x468 fs/ocfs2/dir.c:1995
ocfs2_lookup_ino_from_name+0xb8/0x1d4 fs/ocfs2/dir.c:2017
_ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline]
ocfs2_get_system_file_inode+0x2f8/0x714 fs/ocfs2/sysfile.c:112
ocfs2_init_global_system_inodes+0x2bc/0x618 fs/ocfs2/super.c:457
ocfs2_initialize_super fs/ocfs2/super.c:2250 [inline]
ocfs2_fill_super+0x26ac/0x4a58 fs/ocfs2/super.c:994
mount_bdev+0x274/0x370 fs/super.c:1443
ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1186
legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
vfs_get_tree+0x90/0x274 fs/super.c:1573
do_new_mount+0x278/0x8fc fs/namespace.c:3056
path_mount+0x590/0xe5c fs/namespace.c:3386
do_mount fs/namespace.c:3399 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount fs/namespace.c:3584 [inline]
__arm64_sys_mount+0x498/0x588 fs/namespace.c:3584
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x168 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:585
-> #1 (&osb->system_file_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
ocfs2_get_system_file_inode+0x180/0x714 fs/ocfs2/sysfile.c:101
ocfs2_reserve_suballoc_bits+0x14c/0x4428 fs/ocfs2/suballoc.c:776
ocfs2_reserve_new_metadata_blocks+0x384/0x848 fs/ocfs2/suballoc.c:978
ocfs2_create_refcount_tree+0x2dc/0x1324 fs/ocfs2/refcounttree.c:571
ocfs2_reflink_remap_blocks+0x2dc/0x19e0 fs/ocfs2/refcounttree.c:4655
ocfs2_remap_file_range+0x504/0x794 fs/ocfs2/file.c:2703
vfs_copy_file_range+0xb84/0x122c fs/read_write.c:1518
__do_sys_copy_file_range fs/read_write.c:1596 [inline]
__se_sys_copy_file_range fs/read_write.c:1559 [inline]
__arm64_sys_copy_file_range+0x578/0x914 fs/read_write.c:1559
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x168 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:585
-> #0 (&oi->ip_alloc_sem/1){+.+.}-{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+0x3338/0x7680 kernel/locking/lockdep.c:5049
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689
ocfs2_remap_file_range+0x3dc/0x794 fs/ocfs2/file.c:2695
vfs_copy_file_range+0xb84/0x122c fs/read_write.c:1518
__do_sys_copy_file_range fs/read_write.c:1596 [inline]
__se_sys_copy_file_range fs/read_write.c:1559 [inline]
__arm64_sys_copy_file_range+0x578/0x914 fs/read_write.c:1559
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x168 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:585
other info that might help us debug this:
Chain exists of:
&oi->ip_alloc_sem/1 --> &osb->system_file_mutex --> &ocfs2_file_ip_alloc_sem_key
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_file_ip_alloc_sem_key);
lock(&osb->system_file_mutex);
lock(&ocfs2_file_ip_alloc_sem_key);
lock(&oi->ip_alloc_sem/1);
*** DEADLOCK ***
4 locks held by syz.1.145/5009:
#0: ffff0000f7410460 (sb_writers#13){.+.+}-{0:0}, at: vfs_copy_file_range+0x79c/0x122c fs/read_write.c:1502
#1: ffff0000e18a09c8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff0000e18a09c8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: lock_two_nondirectories+0xd4/0x120 fs/inode.c:1208
#2: ffff0000f4541808 (&sb->s_type->i_mutex_key#20/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
#2: ffff0000f4541808 (&sb->s_type->i_mutex_key#20/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xc4/0x120 fs/inode.c:1210
#3: ffff0000f45414a0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_remap_file_range+0x3c4/0x794 fs/ocfs2/file.c:2693
stack backtrace:
CPU: 1 PID: 5009 Comm: syz.1.145 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2048
check_noncircular+0x2cc/0x378 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+0x3338/0x7680 kernel/locking/lockdep.c:5049
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689
ocfs2_remap_file_range+0x3dc/0x794 fs/ocfs2/file.c:2695
vfs_copy_file_range+0xb84/0x122c fs/read_write.c:1518
__do_sys_copy_file_range fs/read_write.c:1596 [inline]
__se_sys_copy_file_range fs/read_write.c:1559 [inline]
__arm64_sys_copy_file_range+0x578/0x914 fs/read_write.c:1559
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x168 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:585