=====================================
WARNING: bad unlock balance detected!
6.19.0-rc5-next-20260114 #1 Not tainted
-------------------------------------
syz-executor.6/4903 is trying to release lock (rcu_read_lock) at:
[<ffffffff81c1cd75>] __wait_on_freeing_inode+0x105/0x350
but there are no more locks to release!

other info that might help us debug this:
4 locks held by syz-executor.6/4903:
 #0: ffff88800a0cc3f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60
 #1: ffff88804c8fc698 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60
 #2: ffff88800a0b8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0
 #3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890

stack backtrace:
CPU: 0 UID: 0 PID: 4903 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 print_unlock_imbalance_bug+0x118/0x130
 lock_release+0x1ee/0x270
 __wait_on_freeing_inode+0x10a/0x350
 insert_inode_locked+0x25f/0x890
 __ext4_new_inode+0x223d/0x4cd0
 ext4_create+0x2e2/0x4e0
 lookup_open.isra.0+0xc03/0x1030
 path_openat+0xea4/0x2d60
 do_file_open+0x209/0x460
 do_sys_openat2+0xe7/0x210
 __x64_sys_creat+0xcc/0x120
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7febce664b19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febcbbda188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007febce777f60 RCX: 00007febce664b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300
RBP: 00007febce6bef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbc64543f R14: 00007febcbbda300 R15: 0000000000022000
 </TASK>
------------[ cut here ]------------
WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/4903
Modules linked in:
CPU: 0 UID: 0 PID: 4903 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__rcu_read_unlock+0x25f/0x5c0
Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9
RSP: 0018:ffff88806ce08cb8 EFLAGS: 00010086
RAX: 00000000ffffffff RBX: ffff88804c25d280 RCX: ffffffff81893504
RDX: 0000000000000000 RSI: ffffffff8189351b RDI: ffff88804c25d67c
RBP: ffff88804c25d280 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88806ce08ff8 R12: ffff88804c25d280
R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20
FS:  00007febcbbda700(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2da23000 CR3: 000000004c0c3000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 sched_tick+0x232/0x6e0
 update_process_times+0x116/0x210
 tick_nohz_handler+0x4ff/0x8c0
 __hrtimer_run_queues+0x654/0xbb0
 hrtimer_interrupt+0x369/0x830
 __sysvec_apic_timer_interrupt+0xbb/0x300
 sysvec_apic_timer_interrupt+0x6b/0x80
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:handle_bug+0x209/0x4f0
Code: 83 db ff 0f 1f 44 00 00 90 4c 8b ad 90 00 00 00 31 ff 41 81 e5 00 02 00 00 4c 89 ee 0f 1f 44 00 00 4d 85 ed 0f 85 3d 01 00 00 <0f> 1f 44 00 00 48 63 fb 48 c7 c6 60 2a e2 84 0f 1f 44 00 00 81 fb
RSP: 0018:ffff88804ac87400 EFLAGS: 00000206
RAX: ffff88804ac87468 RBX: 000000000000fffe RCX: ffffffff810016ca
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffff88804ac87468 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815d6d6f
R13: 0000000000000200 R14: 0000000000000002 R15: 000000000000000b
 exc_invalid_op+0x35/0x80
 asm_exc_invalid_op+0x1a/0x20
RIP: 0010:__rcu_read_unlock+0x25f/0x5c0
Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9
RSP: 0018:ffff88804ac87510 EFLAGS: 00010286
RAX: 00000000ffffffff RBX: ffff88804c25d280 RCX: ffffc90009ed9000
RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804c25d67c
RBP: ffff88804c25d280 R08: 0000000000000000 R09: fffffbfff0ba6ffc
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804c25d280
R13: 0000000000000001 R14: ffffffff85c0ec30 R15: ffff88804c8fa938
 __wait_on_freeing_inode+0x10f/0x350
 insert_inode_locked+0x25f/0x890
 __ext4_new_inode+0x223d/0x4cd0
 ext4_create+0x2e2/0x4e0
 lookup_open.isra.0+0xc03/0x1030
 path_openat+0xea4/0x2d60
 do_file_open+0x209/0x460
 do_sys_openat2+0xe7/0x210
 __x64_sys_creat+0xcc/0x120
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7febce664b19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febcbbda188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007febce777f60 RCX: 00007febce664b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300
RBP: 00007febce6bef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbc64543f R14: 00007febcbbda300 R15: 0000000000022000
 </TASK>
irq event stamp: 521
hardirqs last  enabled at (521): [<ffffffff84d16a9c>] _raw_spin_unlock_irqrestore+0x2c/0x50
hardirqs last disabled at (520): [<ffffffff84d167f3>] _raw_spin_lock_irqsave+0x53/0x60
softirqs last  enabled at (516): [<ffffffff812cdbb9>] kernel_fpu_end+0x59/0x70
softirqs last disabled at (514): [<ffffffff812cea8b>] kernel_fpu_begin_mask+0x1bb/0x300
---[ end trace 0000000000000000 ]---
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check.
faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
random: crng reseeded on system resumption
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check.
faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
random: crng reseeded on system resumption
syz-executor.0 (5009) used greatest stack depth: 22704 bytes left
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check.
audit: type=1326 audit(1768383996.450:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5028 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9e60c45b19 code=0x0
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check.
audit: type=1326 audit(1768383997.272:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5028 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9e60c45b19 code=0x0
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
blk_print_req_error: 30 callbacks suppressed
I/O error, dev sr0, sector 2087 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 2087 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
buffer_io_error: 38 callbacks suppressed
Buffer I/O error on dev sr0, logical block 0, lost async page write
Buffer I/O error on dev sr0, logical block 1, lost async page write
Buffer I/O error on dev sr0, logical block 2, lost async page write
Buffer I/O error on dev sr0, logical block 3, lost async page write
Buffer I/O error on dev sr0, logical block 4, lost async page write
Buffer I/O error on dev sr0, logical block 5, lost async page write
Buffer I/O error on dev sr0, logical block 6, lost async page write
Buffer I/O error on dev sr0, logical block 7, lost async page write
Buffer I/O error on dev sr0, logical block 8, lost async page write
Buffer I/O error on dev sr0, logical block 9, lost async page write
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 127 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 254 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 381 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 508 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 635 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 762 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 889 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 Sense Key : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 01 fc 00 00 0c 00
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 Sense Key : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 01 fc 00 00 0c 00
hugetlbfs: Unknown parameter './file0'
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'.
program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO
set_capacity_and_notify: 6 callbacks suppressed
loop6: detected capacity change from 0 to 64
FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop3: detected capacity change from 0 to 264192
ISOFS: Logical zone size(0) < hardware blocksize(1024)
loop3: detected capacity change from 0 to 264192
ISOFS: Logical zone size(0) < hardware blocksize(1024)
No source specified
No source specified
No source specified
No source specified
No source specified
No source specified
No source specified
program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO
No source specified
No source specified
No source specified
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
loop5: detected capacity change from 0 to 2560
misc raw-gadget: fail, usb_gadget_register_driver returned -16
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
ext4 filesystem being mounted at /syzkaller-testdir962310168/syzkaller.jJjjV1/82/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
audit: type=1326 audit(1768384004.548:23): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5684 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9da794ab19 code=0x0
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
----------------
Code disassembly (best guess):
   0:	83 db ff             	sbb    $0xffffffff,%ebx
   3:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   8:	90                   	nop
   9:	4c 8b ad 90 00 00 00 	mov    0x90(%rbp),%r13
  10:	31 ff                	xor    %edi,%edi
  12:	41 81 e5 00 02 00 00 	and    $0x200,%r13d
  19:	4c 89 ee             	mov    %r13,%rsi
  1c:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  21:	4d 85 ed             	test   %r13,%r13
  24:	0f 85 3d 01 00 00    	jne    0x167
* 2a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1) <-- trapping instruction
  2f:	48 63 fb             	movslq %ebx,%rdi
  32:	48 c7 c6 60 2a e2 84 	mov    $0xffffffff84e22a60,%rsi
  39:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3e:	81                   	.byte 0x81
  3f:	fb                   	sti