===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.1/6129 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.1/6129: #0: ffff88800f9823f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804ac916f0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f986950 (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: 6129 Comm: syz-executor.1 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: 0033:0x7fea8bf37427 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:00007ffebf9e8d08 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fea8bf37427 RDX: 00007ffebf9e8de7 RSI: 00007fea8bf92019 RDI: 00007ffebf9e8dd0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffebf9e8ba0 R10: 00007ffebf9e8a57 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffebf9e8dd0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/6129 Modules linked in: CPU: 0 UID: 0 PID: 6129 Comm: syz-executor.1 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:ffff8880447879a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888047f75280 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff888047f7567c RBP: ffff888047f75280 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888047f75280 R13: 0000000000000001 R14: ffffffff85c10350 R15: ffff888047449fb0 FS: 000055556ac6c400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea8bfb7541 CR3: 00000000414c4000 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: 0033:0x7fea8bf37427 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:00007ffebf9e8d08 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fea8bf37427 RDX: 00007ffebf9e8de7 RSI: 00007fea8bf92019 RDI: 00007ffebf9e8dd0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffebf9e8ba0 R10: 00007ffebf9e8a57 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffebf9e8dd0 irq event stamp: 169 hardirqs last enabled at (169): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (168): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (164): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (162): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(2000000040.173:15): avc: denied { block_suspend } for pid=6141 comm="syz-executor.6" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. cgroup: noprefix used incorrectly cgroup: noprefix used incorrectly cgroup: noprefix used incorrectly Bluetooth: hci0: Opcode 0x080f failed: -4 capability: warning: `syz-executor.2' uses deprecated v2 capabilities in a way that may be insecure cgroup: noprefix used incorrectly sd 0:0:0:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x24 ascq=0x0 sd 0:0:0:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x24 ascq=0x0 sd 0:0:0:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x24 ascq=0x0 cgroup: noprefix used incorrectly sd 0:0:0:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x24 ascq=0x0 Bluetooth: hci0: command 0x080f tx timeout msdos: Unknown parameter 'obj_user' EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 511 (only 16 groups) sd 0:0:0:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x24 ascq=0x0 random: crng reseeded on system resumption random: crng reseeded on system resumption EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 511 (only 16 groups) loop1: detected capacity change from 0 to 120 loop3: detected capacity change from 0 to 136 isofs_fill_super: bread failed, dev=loop1, iso_blknum=30, block=60 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: root inode is unusable. Disabling Rock Ridge and switching to Joliet. ISOFS: changing to secondary root isofs_fill_super: get root inode failed EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 511 (only 16 groups) loop3: detected capacity change from 0 to 136 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: root inode is unusable. Disabling Rock Ridge and switching to Joliet. ISOFS: changing to secondary root isofs_fill_super: get root inode failed EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 511 (only 16 groups) loop3: detected capacity change from 0 to 136 EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 511 (only 16 groups) ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: root inode is unusable. Disabling Rock Ridge and switching to Joliet. ISOFS: changing to secondary root isofs_fill_super: get root inode failed loop3: detected capacity change from 0 to 136 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: root inode is unusable. Disabling Rock Ridge and switching to Joliet. ISOFS: changing to secondary root isofs_fill_super: get root inode failed EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. scsi_io_completion_action: 6 callbacks suppressed sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Write Verify(10) 2e ec e5 6a 23 c8 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Write Verify(10) 2e ec e5 6a 23 c8 EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Write Verify(10) 2e ec e5 6a 23 c8 EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. __nla_validate_parse: 5 callbacks suppressed netlink: 204 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 204 bytes leftover after parsing attributes in process `syz-executor.1'. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Write Verify(10) 2e ec e5 6a 23 c8 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.5'. 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