===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.2/4449 is trying to release lock (rcu_read_lock) at: [] __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.2/4449: #0: ffff88800fa8e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801f22d020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa9a950 (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: 1 UID: 0 PID: 4449 Comm: syz-executor.2 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: 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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5caa3ba427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffcde48c418 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5caa3ba427 RDX: 00007ffcde48c4f7 RSI: 00007f5caa415019 RDI: 00007ffcde48c4e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcde48c2b0 R10: 00007ffcde48c167 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcde48c4e0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/4449 Modules linked in: CPU: 1 UID: 0 PID: 4449 Comm: syz-executor.2 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:ffff88800a0d79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a69b700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804a69bafc RBP: ffff88804a69b700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a69b700 R13: 0000000000000001 R14: ffffffff85c0ccf0 R15: ffff888009607578 FS: 00005555885a7400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5caa43a542 CR3: 000000004a76b000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5caa3ba427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffcde48c418 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5caa3ba427 RDX: 00007ffcde48c4f7 RSI: 00007f5caa415019 RDI: 00007ffcde48c4e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcde48c2b0 R10: 00007ffcde48c167 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcde48c4e0 irq event stamp: 221 hardirqs last enabled at (221): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (220): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (216): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (214): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_print_req_error: 3 callbacks suppressed I/O error, dev sr0, sector 1024 op 0x1:(WRITE) flags 0x804000 phys_seg 127 prio class 2 buffer_io_error: 1014 callbacks suppressed Buffer I/O error on dev sr0, logical block 1024, lost async page write Buffer I/O error on dev sr0, logical block 1025, lost async page write Buffer I/O error on dev sr0, logical block 1026, lost async page write Buffer I/O error on dev sr0, logical block 1027, lost async page write Buffer I/O error on dev sr0, logical block 1028, lost async page write Buffer I/O error on dev sr0, logical block 1029, lost async page write Buffer I/O error on dev sr0, logical block 1030, lost async page write Buffer I/O error on dev sr0, logical block 1031, lost async page write Buffer I/O error on dev sr0, logical block 1032, lost async page write Buffer I/O error on dev sr0, logical block 1033, lost async page write sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1151 op 0x1:(WRITE) flags 0x804000 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1278 op 0x1:(WRITE) flags 0x804000 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1405 op 0x1:(WRITE) flags 0x800000 phys_seg 3 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1408 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 1535 op 0x1:(WRITE) flags 0x800800 phys_seg 97 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1632 op 0x1:(WRITE) flags 0x804000 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1759 op 0x1:(WRITE) flags 0x800000 phys_seg 121 prio class 2 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 d6 00 00 06 00 critical target error, dev sr0, sector 1880 op 0x1:(WRITE) flags 0x800800 phys_seg 24 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1904 op 0x1:(WRITE) flags 0x804000 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci0: Opcode 0x080f failed: -4 Bluetooth: hci0: Opcode 0x080f failed: -4 Bluetooth: hci0: command 0x080f tx timeout Bluetooth: hci0: command 0x080f tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci0: command 0x080f tx timeout loop6: detected capacity change from 0 to 16 sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_print_req_error: 1 callbacks suppressed I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 1 prio class 2 buffer_io_error: 1046 callbacks suppressed Buffer I/O error on dev sr0, logical block 0, lost async page write loop6: detected capacity change from 0 to 16 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 0, lost async page write