===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/279 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.2/279: #0: ffff88800f8d03f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b8303e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8d4950 (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: 279 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260116 #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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe455f03c27 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 53 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:00007ffce51e5d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffce51e5e10 RCX: 00007fe455f03c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffce51e5e10 RBP: 00007ffce51e5dec R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffce51e5b26 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000033400 R14: 0000000000000013 R15: 00007ffce51e5e50 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/279 Modules linked in: CPU: 1 UID: 0 PID: 279 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260116 #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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88800a9cf9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801bd79b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801bd79f7c RBP: ffff88801bd79b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801bd79b80 R13: 0000000000000001 R14: ffffffff85c0e820 R15: ffff888049ce45d0 FS: 000055555e16a400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555e173c58 CR3: 000000000ccce000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe455f03c27 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 53 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:00007ffce51e5d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffce51e5e10 RCX: 00007fe455f03c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffce51e5e10 RBP: 00007ffce51e5dec R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffce51e5b26 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000033400 R14: 0000000000000013 R15: 00007ffce51e5e50 irq event stamp: 245385 hardirqs last enabled at (245385): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (245384): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (245380): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (245378): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. 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 misc raw-gadget: fail, usb_gadget_register_driver returned -16 EXT4-fs (loop7): unable to read superblock 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 loop7: detected capacity change from 0 to 16383 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. EXT4-fs (loop7): unable to read superblock netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. loop5: detected capacity change from 0 to 1024 ext4: Unknown parameter 'n啈[(CWl]Ę_}ut``/70[G\ψC\3ƞڗ^| %J"_' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. loop5: detected capacity change from 0 to 1024 EXT4-fs (loop7): unable to read superblock ext4: Unknown parameter 'n啈[(CWl]Ę_}ut``/70[G\ψC\3ƞڗ^| %J"_' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) loop1: detected capacity change from 0 to 4 loop5: detected capacity change from 0 to 184 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.