======================================================
WARNING: possible circular locking dependency detected
5.15.179-syzkaller #0 Not tainted
------------------------------------------------------
syz.2.556/6112 is trying to acquire lock:
ffff0000ef5114a0 (&oi->ip_alloc_sem/1){+.+.}-{3:3}, at: ocfs2_remap_file_range+0x3dc/0x794 fs/ocfs2/file.c:2698
but task is already holding lock:
ffff0000de10dbe0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_remap_file_range+0x3c4/0x794 fs/ocfs2/file.c:2696
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+0xc0/0x398 kernel/locking/rwsem.c:1498
ocfs2_read_virt_blocks+0x298/0x960 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+0x3d0/0x228c fs/ocfs2/dir.c:1091
ocfs2_find_files_on_disk+0x10c/0x3d0 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+0x2c8/0x6b8 fs/ocfs2/sysfile.c:112
ocfs2_init_global_system_inodes+0x2bc/0x618 fs/ocfs2/super.c:458
ocfs2_initialize_super fs/ocfs2/super.c:2276 [inline]
ocfs2_fill_super+0x3a74/0x4abc fs/ocfs2/super.c:995
mount_bdev+0x274/0x370 fs/super.c:1400
ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1187
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x278/0x8fc fs/namespace.c:3012
path_mount+0x594/0x101c fs/namespace.c:3342
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount fs/namespace.c:3540 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #1 (&osb->system_file_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
ocfs2_get_system_file_inode+0x180/0x6b8 fs/ocfs2/sysfile.c:101
ocfs2_reserve_suballoc_bits+0x14c/0x416c fs/ocfs2/suballoc.c:776
ocfs2_reserve_new_metadata_blocks+0x388/0x864 fs/ocfs2/suballoc.c:978
ocfs2_create_refcount_tree+0x2b8/0x1284 fs/ocfs2/refcounttree.c:571
ocfs2_reflink_remap_blocks+0x2dc/0x19e0 fs/ocfs2/refcounttree.c:4683
ocfs2_remap_file_range+0x504/0x794 fs/ocfs2/file.c:2706
vfs_copy_file_range+0xad4/0x1138 fs/read_write.c:1510
__do_sys_copy_file_range fs/read_write.c:1588 [inline]
__se_sys_copy_file_range fs/read_write.c:1551 [inline]
__arm64_sys_copy_file_range+0x5f8/0x9d8 fs/read_write.c:1551
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #0 (&oi->ip_alloc_sem/1){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
down_write_nested+0xc0/0x130 kernel/locking/rwsem.c:1667
ocfs2_remap_file_range+0x3dc/0x794 fs/ocfs2/file.c:2698
vfs_copy_file_range+0xad4/0x1138 fs/read_write.c:1510
__do_sys_copy_file_range fs/read_write.c:1588 [inline]
__se_sys_copy_file_range fs/read_write.c:1551 [inline]
__arm64_sys_copy_file_range+0x5f8/0x9d8 fs/read_write.c:1551
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
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.2.556/6112:
#0: ffff0000d63d2460 (sb_writers#28){.+.+}-{0:0}, at: vfs_copy_file_range+0x788/0x1138 fs/read_write.c:1494
#1: ffff0000de10df48 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff0000de10df48 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: lock_two_nondirectories+0xd4/0x120 fs/inode.c:1147
#2: ffff0000ef511808 (&sb->s_type->i_mutex_key#33/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
#2: ffff0000ef511808 (&sb->s_type->i_mutex_key#33/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xc4/0x120 fs/inode.c:1149
#3: ffff0000de10dbe0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_remap_file_range+0x3c4/0x794 fs/ocfs2/file.c:2696
stack backtrace:
CPU: 0 PID: 6112 Comm: syz.2.556 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__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:2011
check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
down_write_nested+0xc0/0x130 kernel/locking/rwsem.c:1667
ocfs2_remap_file_range+0x3dc/0x794 fs/ocfs2/file.c:2698
vfs_copy_file_range+0xad4/0x1138 fs/read_write.c:1510
__do_sys_copy_file_range fs/read_write.c:1588 [inline]
__se_sys_copy_file_range fs/read_write.c:1551 [inline]
__arm64_sys_copy_file_range+0x5f8/0x9d8 fs/read_write.c:1551
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584