===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.7/4644 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.7/4644: #0: ffff88800f7ba3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804bebc698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7be950 (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: 4644 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 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: 0033:0x7f74cf076427 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:00007ffff8454dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f74cf076427 RDX: ffffffffffffffbc RSI: 00007f74cf0d100e RDI: 00007f74cf0d01dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffff8454840 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffff8454e90 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/4644 Modules linked in: CPU: 0 UID: 0 PID: 4644 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.7/4644 Modules linked in: CPU: 0 UID: 0 PID: 4644 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rcu_exp_handler+0x12b/0x570 Code: 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 cb 03 00 00 0f b6 43 11 84 c0 75 b6 85 c9 74 1d 0f 8f bf 00 00 00 90 <0f> 0b 90 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 4f 83 74 03 RSP: 0018:ffff88806ce08f50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801d47d280 RDI: ffff88801d47d67c RBP: ffffffff85e31080 R08: 0000000000000000 R09: fffffbfff0ccdd6a R10: 0000000000000001 R11: ffff88806ce08ff8 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e310f8 R15: ffff88806ce38820 FS: 000055555d3fe400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d42b000 CR3: 000000001b92b000 CR4: 0000000000350ef0 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0xa1/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:console_flush_one_record+0x900/0xb70 Code: 8b 04 24 48 c1 e8 03 42 80 3c 38 00 0f 85 53 02 00 00 4d 89 65 58 e9 41 ff ff ff e8 6a d8 1f 00 e8 e5 57 28 00 fb 48 8b 04 24 <48> c1 e8 03 42 80 3c 38 00 0f 84 1f ff ff ff 48 8b 3c 24 e8 f8 55 RSP: 0018:ffff888016ddf308 EFLAGS: 00000246 RAX: ffffffff86155e98 RBX: 0000000000000001 RCX: ffffffff817e018b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8155a95b RBP: ffff888016ddf468 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666eb57 R11: 652d7a7973205043 R12: 0000000000000200 R13: ffffffff86155e40 R14: 0000000000000000 R15: dffffc0000000000 __console_flush_and_unlock+0xb1/0x1d0 vprintk_emit+0x4b5/0x680 _printk+0xbe/0xf0 dump_stack_print_info+0x144/0x240 show_regs+0x14/0x60 __warn+0xfc/0x370 __report_bug+0x421/0x5b0 report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff888016ddf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801d47d280 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801d47d67c RBP: ffff88801d47d280 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d47d280 R13: 0000000000000001 R14: ffffffff85c0e730 R15: ffff88804bcb1fb0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 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: 0033:0x7f74cf076427 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:00007ffff8454dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f74cf076427 RDX: ffffffffffffffbc RSI: 00007f74cf0d100e RDI: 00007f74cf0d01dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffff8454840 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffff8454e90 irq event stamp: 1413 hardirqs last enabled at (1413): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1412): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1408): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1406): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Tainted: [W]=WARN 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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff888016ddf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801d47d280 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801d47d67c RBP: ffff88801d47d280 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d47d280 R13: 0000000000000001 R14: ffffffff85c0e730 R15: ffff88804bcb1fb0 FS: 000055555d3fe400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d42b000 CR3: 000000001b92b000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 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: 0033:0x7f74cf076427 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:00007ffff8454dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f74cf076427 RDX: ffffffffffffffbc RSI: 00007f74cf0d100e RDI: 00007f74cf0d01dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffff8454840 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffff8454e90 irq event stamp: 1413 hardirqs last enabled at (1413): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1412): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1408): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1406): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption loop7: detected capacity change from 0 to 2304 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 ---------------- Code disassembly (best guess): 0: 8b 04 24 mov (%rsp),%eax 3: 48 c1 e8 03 shr $0x3,%rax 7: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) c: 0f 85 53 02 00 00 jne 0x265 12: 4d 89 65 58 mov %r12,0x58(%r13) 16: e9 41 ff ff ff jmpq 0xffffff5c 1b: e8 6a d8 1f 00 callq 0x1fd88a 20: e8 e5 57 28 00 callq 0x28580a 25: fb sti 26: 48 8b 04 24 mov (%rsp),%rax * 2a: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction 2e: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 33: 0f 84 1f ff ff ff je 0xffffff58 39: 48 8b 3c 24 mov (%rsp),%rdi 3d: e8 .byte 0xe8 3e: f8 clc 3f: 55 push %rbp