===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.5/4726 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.5/4726: #0: ffff88800f9443f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049146330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f930950 (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: 4726 Comm: syz-executor.5 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: 0033:0x7f5410f89427 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:00007ffd2410f7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5410f89427 RDX: 00007ffd2410f8b3 RSI: 00007f5410fe4022 RDI: 00007ffd2410f8a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd2410f670 R10: 00007ffd2410f527 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd2410f8a0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4726 Modules linked in: CPU: 0 UID: 0 PID: 4726 Comm: syz-executor.5 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_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:ffff88801dc479a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801681d280 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801681d67c RBP: ffff88801681d280 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801681d280 R13: 0000000000000001 R14: ffffffff85c0c570 R15: ffff88801c7a0318 FS: 000055557e08d400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7ac22d570 CR3: 000000001af7f000 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: 0033:0x7f5410f89427 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:00007ffd2410f7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5410f89427 RDX: 00007ffd2410f8b3 RSI: 00007f5410fe4022 RDI: 00007ffd2410f8a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd2410f670 R10: 00007ffd2410f527 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd2410f8a0 irq event stamp: 311 hardirqs last enabled at (311): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (310): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (306): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (304): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768370146.166:29): avc: denied { module_load } for pid=4725 comm="syz-executor.3" path=2F6D656D66643A2F70726F632F7468726561642D73656C662F617474722F6673637265617465202864656C6574656429 dev="tmpfs" ino=1044 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1 loop7: detected capacity change from 0 to 128 audit: type=1400 audit(1768370153.122:30): avc: denied { map } for pid=4741 comm="syz-executor.2" path="pipe:[8128]" dev="pipefs" ino=8128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 0 UID: 0 PID: 4754 Comm: syz-executor.0 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_fail_alloc_page+0xe0/0x110 prepare_alloc_pages+0x1eb/0x550 __alloc_frozen_pages_noprof+0x185/0x2070 alloc_pages_mpol+0xed/0x340 vma_alloc_folio_noprof+0xe9/0x440 __handle_mm_fault+0x145c/0x2f50 handle_mm_fault+0x2d8/0x750 do_user_addr_fault+0x3cc/0x12b0 exc_page_fault+0xb0/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0010:__put_user_4+0xd/0x20 Code: 66 89 01 31 c9 0f 01 ca e9 90 70 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <89> 01 31 c9 0f 01 ca e9 67 70 03 00 0f 1f 80 00 00 00 00 90 90 90 RSP: 0018:ffff88801dd4fc68 EFLAGS: 00050206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000200051c0 RDX: 1ffff11001e85eae RSI: 0000000000000008 RDI: ffff88800f42f570 RBP: ffff88800f42f000 R08: 0000000000000000 R09: ffffed1001e85eae R10: ffff88800f42f577 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88800f42f570 R15: ffffffff8463cf40 sco_sock_getsockopt+0x623/0x1240 do_sock_getsockopt+0x24d/0x410 __sys_getsockopt+0x125/0x1b0 __x64_sys_getsockopt+0xbe/0x160 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbcef06fb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fbcec5e5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fbcef182f60 RCX: 00007fbcef06fb19 RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fbcec5e51d0 R08: 0000000020002a00 R09: 0000000000000000 R10: 00000000200051c0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdfc36140f R14: 00007fbcec5e5300 R15: 0000000000022000 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. ---------------- Code disassembly (best guess): 0: 66 89 01 mov %ax,(%rcx) 3: 31 c9 xor %ecx,%ecx 5: 0f 01 ca clac 8: e9 90 70 03 00 jmpq 0x3709d d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 48 89 cb mov %rcx,%rbx 20: 48 c1 fb 3f sar $0x3f,%rbx 24: 48 09 d9 or %rbx,%rcx 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: e9 67 70 03 00 jmpq 0x3709d 36: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 3d: 90 nop 3e: 90 nop 3f: 90 nop