===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.7/4565 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.7/4565: #0: ffff88800f6723f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888040d7d9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f676950 (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: 4565 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_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: 0033:0x7f00f380c427 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:00007ffded29c158 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f00f380c427 RDX: 00007ffded29c237 RSI: 00007f00f3867019 RDI: 00007ffded29c220 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffded29bff0 R10: 00007ffded29bea7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffded29c220 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/4565 Modules linked in: CPU: 1 UID: 0 PID: 4565 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:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888017e25280 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffffff85e25fc0 RDI: ffff888017e2567c RBP: ffff888017e25280 R08: 0000000000000000 R09: ffffffff84e98ac0 R10: 0000000000000000 R11: 0000000000000337 R12: ffff888017e25280 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 000055555e7a5400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f00f388c547 CR3: 0000000056329000 CR4: 0000000000350ef0 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 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:ffff888010347890 EFLAGS: 00000206 RAX: ffff8880103478f8 RBX: 000000000000fffe RCX: ffffffff810016ca RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffff8880103478f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815d742f 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 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:ffff8880103479a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888017e25280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888017e2567c RBP: ffff888017e25280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888017e25280 R13: 0000000000000001 R14: ffffffff85c0f860 R15: ffff888009613c48 __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: 0033:0x7f00f380c427 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:00007ffded29c158 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f00f380c427 RDX: 00007ffded29c237 RSI: 00007f00f3867019 RDI: 00007ffded29c220 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffded29bff0 R10: 00007ffded29bea7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffded29c220 irq event stamp: 183 hardirqs last enabled at (183): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (182): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (178): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (176): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- syz-executor.0: page allocation failure: order:0, mode:0x10cc0(GFP_KERNEL|__GFP_NORETRY), nodemask=(null),cpuset=/,mems_allowed=0 CPU: 0 UID: 0 PID: 4559 Comm: syz-executor.0 Tainted: G W 6.19.0-rc5-next-20260116 #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 warn_alloc+0x211/0x370 __alloc_frozen_pages_noprof+0x17c5/0x25b0 alloc_pages_mpol+0xed/0x340 alloc_pages_noprof+0xa1/0x380 kimage_alloc_pages+0x70/0x240 kimage_alloc_control_pages+0x18f/0x970 do_kexec_load+0x2c1/0xa50 __x64_sys_kexec_load+0x1c6/0x230 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f365eb41b19 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:00007f365c0b7188 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6 RAX: ffffffffffffffda RBX: 00007f365ec54f60 RCX: 00007f365eb41b19 RDX: 0000000020000140 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 00007f365eb9bf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfaa189df R14: 00007f365c0b7300 R15: 0000000000022000 Mem-Info: active_anon:56 inactive_anon:58066 isolated_anon:0 active_file:9287 inactive_file:34113 isolated_file:60 unevictable:0 dirty:291 writeback:0 slab_reclaimable:5379 slab_unreclaimable:51965 mapped:80974 shmem:102 pagetables:2064 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:7551 free_pcp:606 free_cma:0 Node 0 active_anon:224kB inactive_anon:232264kB active_file:37148kB inactive_file:135684kB unevictable:0kB isolated(anon):0kB isolated(file):240kB mapped:323896kB dirty:1164kB writeback:0kB shmem:408kB kernel_stack:5568kB pagetables:8256kB sec_pagetables:0kB all_unreclaimable? no Balloon:0kB Node 0 DMA free:6432kB boost:0kB min:44kB low:56kB high:68kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 1597 1597 1597 Node 0 DMA32 free:30572kB boost:12460kB min:17528kB low:19148kB high:20768kB reserved_highatomic:0KB free_highatomic:0KB active_anon:224kB inactive_anon:232180kB active_file:36476kB inactive_file:130100kB unevictable:0kB writepending:1164kB zspages:0kB present:2080640kB managed:1635448kB mlocked:0kB bounce:0kB free_pcp:1400kB local_pcp:560kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 0*64kB 0*128kB 1*256kB (U) 0*512kB 0*1024kB 1*2048kB (M) 1*4096kB (M) = 6436kB Node 0 DMA32: 803*4kB (UME) 338*8kB (ME) 154*16kB (UME) 122*32kB (UME) 95*64kB (ME) 33*128kB (ME) 18*256kB (UME) 9*512kB (UME) 5*1024kB (ME) 1*2048kB (M) 0*4096kB = 38972kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 17506 total pagecache pages 0 pages in swap cache Free swap = 0kB Total swap = 0kB 524158 pages RAM 0 pages HighMem/MovableOnly 111456 pages reserved Memory cgroup min protection 0kB -- low protection 13292kB kexec: Could not allocate control_code_buffer loop3: detected capacity change from 0 to 136 isofs_fill_super: get root inode failed loop3: detected capacity change from 0 to 136 isofs_fill_super: get root inode failed loop7: detected capacity change from 0 to 256 ISO 9660 Extensions: Microsoft Joliet Level 0 ISO 9660 Extensions: FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 UID: 0 PID: 4599 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260116 #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 _copy_from_user+0x30/0xd0 memdup_user+0x7e/0xe0 __x64_sys_kexec_load+0x195/0x230 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa155798b19 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:00007fa152d0e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6 RAX: ffffffffffffffda RBX: 00007fa1558abf60 RCX: 00007fa155798b19 RDX: 0000000020000140 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 00007fa152d0e1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc94505bdf R14: 00007fa152d0e300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 4605 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260116 #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 _copy_to_user+0x32/0xd0 simple_read_from_buffer+0xe0/0x180 proc_fail_nth_read+0x18a/0x240 vfs_read+0x1eb/0xc70 ksys_read+0x121/0x240 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa15574b69c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007fa152d0e170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00007fa15574b69c RDX: 000000000000000f RSI: 00007fa152d0e1e0 RDI: 0000000000000003 RBP: 00007fa152d0e1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc94505bdf R14: 00007fa152d0e300 R15: 0000000000022000 kexec: Could not allocate control_code_buffer ---------------- 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