loop2: detected capacity change from 0 to 32768
ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc5-syzkaller #0 Not tainted
------------------------------------------------------
syz.2.849/10016 is trying to acquire lock:
ffff8880571c3480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
ffff8880571c3480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_move_extent+0x6ea/0x17f0 fs/ocfs2/move_extents.c:640
but task is already holding lock:
ffff888057305100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
ffff888057305100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}, at: ocfs2_move_extent+0x429/0x17f0 fs/ocfs2/move_extents.c:632
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}:
down_write+0x92/0x200 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_reserve_suballoc_bits+0x11c/0x4900 fs/ocfs2/suballoc.c:788
ocfs2_reserve_cluster_bitmap_bits+0xd6/0x1e0 fs/ocfs2/suballoc.c:1134
ocfs2_reserve_clusters_with_limit+0x148/0xe80 fs/ocfs2/suballoc.c:1179
ocfs2_defrag_extent+0x403/0x14e0 fs/ocfs2/move_extents.c:266
__ocfs2_move_extents_range fs/ocfs2/move_extents.c:857 [inline]
ocfs2_move_extents+0xc3f/0x1980 fs/ocfs2/move_extents.c:927
ocfs2_ioctl_move_extents+0x54d/0xb20 fs/ocfs2/move_extents.c:1053
ocfs2_ioctl+0x3c6/0x6f0 fs/ocfs2/ioctl.c:946
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
down_write+0x92/0x200 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_move_extent+0x6ea/0x17f0 fs/ocfs2/move_extents.c:640
__ocfs2_move_extents_range fs/ocfs2/move_extents.c:860 [inline]
ocfs2_move_extents+0xd69/0x1980 fs/ocfs2/move_extents.c:927
ocfs2_ioctl_move_extents+0x54d/0xb20 fs/ocfs2/move_extents.c:1053
ocfs2_ioctl+0x3c6/0x6f0 fs/ocfs2/ioctl.c:946
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7);
*** DEADLOCK ***
5 locks held by syz.2.849/10016:
#0: ffff8880381f0428 (sb_writers#17){.+.+}-{0:0}, at: ocfs2_ioctl_move_extents+0xc4/0xb20 fs/ocfs2/move_extents.c:985
#1: ffff8880571c42c0 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#1: ffff8880571c42c0 (&sb->s_type->i_mutex_key#23){+.+.}-{4:4}, at: ocfs2_move_extents+0x1c3/0x1980 fs/ocfs2/move_extents.c:905
#2: ffff8880571c3f60 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_move_extents+0x429/0x1980 fs/ocfs2/move_extents.c:925
#3: ffff888057306d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#3: ffff888057306d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x4900 fs/ocfs2/suballoc.c:788
#4: ffff888057305100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#4: ffff888057305100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{4:4}, at: ocfs2_move_extent+0x429/0x17f0 fs/ocfs2/move_extents.c:632
stack backtrace:
CPU: 0 UID: 0 PID: 10016 Comm: syz.2.849 Not tainted 6.16.0-rc5-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046
check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain kernel/locking/lockdep.c:3911 [inline]
__lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
down_write+0x92/0x200 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_move_extent+0x6ea/0x17f0 fs/ocfs2/move_extents.c:640
__ocfs2_move_extents_range fs/ocfs2/move_extents.c:860 [inline]
ocfs2_move_extents+0xd69/0x1980 fs/ocfs2/move_extents.c:927
ocfs2_ioctl_move_extents+0x54d/0xb20 fs/ocfs2/move_extents.c:1053
ocfs2_ioctl+0x3c6/0x6f0 fs/ocfs2/ioctl.c:946
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b01b8e929
Code: ff ff c3 66 2e 0f 1f 84 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
RSP: 002b:00007f6b029d8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6b01db5fa0 RCX: 00007f6b01b8e929
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000004
RBP: 00007f6b01c10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6b01db5fa0 R15: 00007ffd287f7c68
</TASK>