loop2: detected capacity change from 0 to 64 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) cgroup2: Unknown parameter 'net_cls' ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.7/4013 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.7/4013: #0: ffff88800fe663f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a493d10 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fe72950 (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: 4013 Comm: syz-executor.7 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: 0033:0x7f9d2aaf1c27 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:00007ffc8c1bc658 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc8c1bc6e0 RCX: 00007f9d2aaf1c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc8c1bc6e0 RBP: 00007ffc8c1bc6bc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc8c1bc3f6 R11: 0000000000000202 R12: 0000000000000032 R13: 00000000000566dc R14: 0000000000000014 R15: 00007ffc8c1bc720 cgroup2: Unknown parameter 'net_cls' ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/4013 Modules linked in: CPU: 0 UID: 0 PID: 4013 Comm: syz-executor.7 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:ffff88801dd2f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049c21b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888049c21f7c RBP: ffff888049c21b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888049c21b80 R13: 0000000000000001 R14: ffffffff85c0c980 R15: ffff88804a6ba938 FS: 0000555571302400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb7d9fcf108 CR3: 000000001ceea000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.7/4013 Modules linked in: CPU: 0 UID: 0 PID: 4013 Comm: syz-executor.7 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:ffff88806ce08f50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff888049c21b80 RDI: ffff888049c21f7c RBP: ffffffff85e31300 R08: 0000000000000000 R09: fffffbfff0ccdd0a R10: 0000000000000001 R11: ffff88806ce08ff8 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e31378 R15: ffff88806ce38820 FS: 0000555571302400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb7d9fcf108 CR3: 000000001ceea000 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:__sanitizer_cov_trace_pc+0x0/0x80 Code: 5d 41 5c 41 5d e9 80 3f 5c 03 48 c7 c0 f4 ff ff ff eb 92 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 a8 5d 38 06 65 8b 05 b9 5d 38 RSP: 0018:ffff88801dd2f388 EFLAGS: 00000283 RAX: 0000000000000000 RBX: ffffffff86679540 RCX: ffffffff84c54bdf RDX: ffff888049c21b80 RSI: ffffffff815d742f RDI: 0000000000000006 RBP: ffffffff87025737 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff87025737 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4d9/0x5b0 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:ffff88801dd2f5e8 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049c21b80 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff888049c21f7c RBP: ffff888049c21b80 R08: 0000000000000000 R09: ffffffff84e98ac0 R10: ffffffff84f81000 R11: 0000000000000001 R12: ffff888049c21b80 R13: 0000000000000000 R14: ffff88801dd2f6a0 R15: ffffffff85999179 is_module_text_address+0x6c/0x100 kernel_text_address+0x35/0xc0 __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:ffff88801dd2f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049c21b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888049c21f7c RBP: ffff888049c21b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888049c21b80 R13: 0000000000000001 R14: ffffffff85c0c980 R15: ffff88804a6ba938 __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: 0033:0x7f9d2aaf1c27 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:00007ffc8c1bc658 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc8c1bc6e0 RCX: 00007f9d2aaf1c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc8c1bc6e0 RBP: 00007ffc8c1bc6bc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc8c1bc3f6 R11: 0000000000000202 R12: 0000000000000032 R13: 00000000000566dc R14: 0000000000000014 R15: 00007ffc8c1bc720 irq event stamp: 278649 hardirqs last enabled at (278649): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (278648): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (278644): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (278642): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- 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: 0033:0x7f9d2aaf1c27 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:00007ffc8c1bc658 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc8c1bc6e0 RCX: 00007f9d2aaf1c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc8c1bc6e0 RBP: 00007ffc8c1bc6bc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc8c1bc3f6 R11: 0000000000000202 R12: 0000000000000032 R13: 00000000000566dc R14: 0000000000000014 R15: 00007ffc8c1bc720 irq event stamp: 278649 hardirqs last enabled at (278649): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (278648): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (278644): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (278642): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 4096 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. audit: type=1326 audit(1768666718.217:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5945 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ff889ab0b19 code=0x0 loop6: detected capacity change from 0 to 16369 nfs: Unknown parameter '&/' loop6: detected capacity change from 0 to 16369 nfs: Unknown parameter '&/' audit: type=1326 audit(1768666719.047:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5945 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ff889ab0b19 code=0x0 ---------------- Code disassembly (best guess): 0: 5d pop %rbp 1: 41 5c pop %r12 3: 41 5d pop %r13 5: e9 80 3f 5c 03 jmpq 0x35c3f8a a: 48 c7 c0 f4 ff ff ff mov $0xfffffffffffffff4,%rax 11: eb 92 jmp 0xffffffa5 13: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 48 8b 34 24 mov (%rsp),%rsi 32: 65 48 8b 15 a8 5d 38 mov %gs:0x6385da8(%rip),%rdx # 0x6385de2 39: 06 3a: 65 gs 3b: 8b .byte 0x8b 3c: 05 .byte 0x5 3d: b9 .byte 0xb9 3e: 5d pop %rbp 3f: 38 .byte 0x38