===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/4158 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.2/4158: #0: ffff88800a3c83f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888017fe96f0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a3cc950 (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: 4158 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_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: 0033:0x7fbff322fc27 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:00007fbff07a5fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbff322fc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000540 RBP: 00007fbff07a6040 R08: 0000000000000000 R09: 00000000c0ed0000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500 R13: 0000000020000540 R14: 00007fbff07a6000 R15: 0000000020001980 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/4158 Modules linked in: CPU: 1 UID: 0 PID: 4158 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:ffff88801e8d79e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804928b700 RCX: ffffc90008cd0000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804928bafc RBP: ffff88804928b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804928b700 R13: 0000000000000001 R14: ffffffff85c0e230 R15: ffff88801c8a7578 FS: 00007fbff07a6700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c371f14008 CR3: 0000000048711000 CR4: 0000000000350ef0 Call Trace: __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: 0033:0x7fbff322fc27 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:00007fbff07a5fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbff322fc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000540 RBP: 00007fbff07a6040 R08: 0000000000000000 R09: 00000000c0ed0000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500 R13: 0000000020000540 R14: 00007fbff07a6000 R15: 0000000020001980 irq event stamp: 469 hardirqs last enabled at (469): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (468): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (464): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (462): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 264192 loop7: detected capacity change from 0 to 264192 tmpfs: Unknown parameter '' tmpfs: Unknown parameter '' loop6: detected capacity change from 0 to 512 EXT4-fs error (device loop6): __ext4_fill_super:5560: inode #2: comm syz-executor.6: iget: bad extra_isize 52386 (inode size 512) EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed loop6: detected capacity change from 0 to 15 nfs4: Unknown parameter 'ext4' loop6: detected capacity change from 0 to 512 EXT4-fs error (device loop6): __ext4_fill_super:5560: inode #2: comm syz-executor.6: iget: bad extra_isize 52386 (inode size 512) EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed audit: type=1400 audit(1768633803.534:11): avc: denied { tracepoint } for pid=4198 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1