===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.3/4035 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.3/4035: #0: ffff88800fbc63f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a19d9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fbda950 (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: 4035 Comm: syz-executor.3 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: 0033:0x7f6bb1670427 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:00007ffdd5c13548 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6bb1670427 RDX: 00007ffdd5c13627 RSI: 00007f6bb16cb019 RDI: 00007ffdd5c13610 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdd5c133e0 R10: 00007ffdd5c13297 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdd5c13610 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/4035 Modules linked in: CPU: 1 UID: 0 PID: 4035 Comm: syz-executor.3 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:ffff88806cf089b0 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff8880493b1b80 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8149c57c RDI: ffff8880493b1f7c RBP: ffff8880493b1b80 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666e357 R11: ffff88800f430068 R12: ffff8880493b1b80 R13: 0000000000000008 R14: 0000000000000001 R15: ffff88800f430000 FS: 0000555588a9b400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6bb16f0543 CR3: 000000001e78f000 CR4: 0000000000350ef0 Call Trace: select_task_rq_fair+0x496/0x3870 try_to_wake_up+0x51b/0x1680 autoremove_wake_function+0x16/0x130 __wake_up_common+0x138/0x1f0 __wake_up+0x31/0x60 wake_up_klogd_work_func+0x1a3/0x1e0 irq_work_single+0x128/0x260 irq_work_run_list+0x91/0xc0 update_process_times+0x12f/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 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:ffff88804acf7890 EFLAGS: 00000206 RAX: ffff88804acf78f8 RBX: 000000000000fffe RCX: ffffffff810016ca RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffff88804acf78f8 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:ffff88804acf79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880493b1b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880493b1f7c RBP: ffff8880493b1b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880493b1b80 R13: 0000000000000001 R14: ffffffff85c0ee60 R15: ffff88804a18bc48 __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: 0033:0x7f6bb1670427 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:00007ffdd5c13548 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6bb1670427 RDX: 00007ffdd5c13627 RSI: 00007f6bb16cb019 RDI: 00007ffdd5c13610 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdd5c133e0 R10: 00007ffdd5c13297 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdd5c13610 irq event stamp: 455 hardirqs last enabled at (455): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (454): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (450): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (448): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 'syz-executor.1': attribute type 8 has an invalid length. netlink: 'syz-executor.1': attribute type 8 has an invalid length. UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO EXT4-fs (loop4): unable to read superblock EXT4-fs (loop4): unable to read superblock loop7: detected capacity change from 0 to 512 audit: type=1400 audit(1768382633.439:10): avc: denied { write } for pid=4191 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. audit: type=1400 audit(1768382633.495:11): avc: denied { block_suspend } for pid=4191 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 EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 3 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): error, fat_get_cluster: invalid start cluster (i_pos 1, start 00000001) FAT-fs (loop0): Filesystem has been set read-only loop0: detected capacity change from 0 to 3 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): error, fat_get_cluster: invalid start cluster (i_pos 1, start 00000001) FAT-fs (loop0): Filesystem has been set read-only loop3: detected capacity change from 0 to 4 EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! EXT4-fs (loop3): fragment/cluster size (32768) != block size (2048) loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): fragment/cluster size (32768) != block size (2048) syz-executor.4 uses obsolete (PF_INET,SOCK_PACKET) loop3: detected capacity change from 0 to 192 : Can't lookup blockdev UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list process 'syz-executor.7' launched './file1' with NULL argv: empty string added loop5: detected capacity change from 0 to 240 ISO 9660 Extensions: Microsoft Joliet Level 3 loop5: detected capacity change from 0 to 240 ---------------- 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