===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/6966 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.2/6966: #0: ffff88800fa143f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804aa783e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa20950 (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: 6966 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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f15d9f4a427 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:00007ffc3cbceb68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15d9f4a427 RDX: 00007ffc3cbcec47 RSI: 00007f15d9fa5019 RDI: 00007ffc3cbcec30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc3cbcea00 R10: 00007ffc3cbce8b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc3cbcec30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/6966 Modules linked in: CPU: 1 UID: 0 PID: 6966 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:ffff88804bb4f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f218000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800f2183fc RBP: ffff88800f218000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f218000 R13: 0000000000000001 R14: ffffffff85c10080 R15: ffff88804a9cd8e0 FS: 0000555560dfb400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15d9fca542 CR3: 0000000017a31000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f15d9f4a427 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:00007ffc3cbceb68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15d9f4a427 RDX: 00007ffc3cbcec47 RSI: 00007f15d9fa5019 RDI: 00007ffc3cbcec30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc3cbcea00 R10: 00007ffc3cbce8b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc3cbcec30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#1: syz-executor.2/6966 Modules linked in: CPU: 1 UID: 0 PID: 6966 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_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 6f d7 74 03 RSP: 0018:ffff88806cf08f50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806cf38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88800f218000 RDI: ffff88800f2183fc RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: 0000000000000001 R11: ffff88806cf08ff8 R12: ffff88806cf38811 R13: ffff88806cf38828 R14: ffffffff85e31378 R15: ffff88806cf38820 FS: 0000555560dfb400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15d9fca542 CR3: 0000000017a31000 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:__report_bug+0x4dd/0x5b0 Code: d0 7c 08 84 d2 0f 85 b0 00 00 00 48 63 2b 4c 89 e7 48 01 dd 48 89 ee e8 11 31 b0 fc 49 39 ec 74 22 e8 77 36 b0 fc 48 83 c3 10 <48> 81 fb 20 8b 6c 86 72 b2 e8 65 36 b0 fc 4c 89 e7 e8 9d f7 ff ff RSP: 0018:ffff88804bb4f340 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffffffff86683280 RCX: ffffffff84c54bdf RDX: ffff88800f218000 RSI: ffffffff84c54be9 RDI: 0000000000000006 RBP: ffffffff815d19ab R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815d19ab R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b 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 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:ffff88804bb4f590 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f218000 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff88800f2183fc RBP: ffff88800f218000 R08: ffffffff81760a4e R09: ffffffff84e98ac0 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f218000 R13: dffffc0000000000 R14: ffffffff85e7fcc8 R15: ffffffff85999179 __is_insn_slot_addr+0x140/0x290 kernel_text_address+0x5b/0xc0 __kernel_text_address+0xd/0x40 __show_trace_log_lvl+0x1c3/0x380 __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 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:ffff88804bb4f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f218000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800f2183fc RBP: ffff88800f218000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f218000 R13: 0000000000000001 R14: ffffffff85c10080 R15: ffff88804a9cd8e0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f15d9f4a427 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:00007ffc3cbceb68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15d9f4a427 RDX: 00007ffc3cbcec47 RSI: 00007f15d9fa5019 RDI: 00007ffc3cbcec30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc3cbcea00 R10: 00007ffc3cbce8b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc3cbcec30 irq event stamp: 187 hardirqs last enabled at (187): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (186): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (182): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (180): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- irq event stamp: 187 hardirqs last enabled at (187): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (186): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (182): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (180): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ---------------- Code disassembly (best guess): 0: d0 7c 08 84 sarb -0x7c(%rax,%rcx,1) 4: d2 0f rorb %cl,(%rdi) 6: 85 b0 00 00 00 48 test %esi,0x48000000(%rax) c: 63 2b movslq (%rbx),%ebp e: 4c 89 e7 mov %r12,%rdi 11: 48 01 dd add %rbx,%rbp 14: 48 89 ee mov %rbp,%rsi 17: e8 11 31 b0 fc callq 0xfcb0312d 1c: 49 39 ec cmp %rbp,%r12 1f: 74 22 je 0x43 21: e8 77 36 b0 fc callq 0xfcb0369d 26: 48 83 c3 10 add $0x10,%rbx * 2a: 48 81 fb 20 8b 6c 86 cmp $0xffffffff866c8b20,%rbx <-- trapping instruction 31: 72 b2 jb 0xffffffe5 33: e8 65 36 b0 fc callq 0xfcb0369d 38: 4c 89 e7 mov %r12,%rdi 3b: e8 9d f7 ff ff callq 0xfffff7dd