===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.6/4568 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.6/4568: #0: ffff88800a3c83f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff888047c56330 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #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: 0 UID: 0 PID: 4568 Comm: syz-executor.6 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_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0f35d62b19 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:00007f0f332b7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f0f35e76020 RCX: 00007f0f35d62b19 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 00000000200000c0 RBP: 00007f0f35dbcf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd25e4dc0f R14: 00007f0f332b7300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/4568 Modules linked in: CPU: 0 UID: 0 PID: 4568 Comm: syz-executor.6 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:ffff88801a9df510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888013cd0000 RCX: ffffc90007232000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888013cd03fc RBP: ffff888013cd0000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888013cd0000 R13: 0000000000000001 R14: ffffffff85c0c930 R15: ffff888047cac5d0 FS: 00007f0f332b7700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055748b704408 CR3: 00000000488b1000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0f35d62b19 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:00007f0f332b7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f0f35e76020 RCX: 00007f0f35d62b19 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 00000000200000c0 RBP: 00007f0f35dbcf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd25e4dc0f R14: 00007f0f332b7300 R15: 0000000000022000 irq event stamp: 73 hardirqs last enabled at (73): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (72): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (68): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (66): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop4: detected capacity change from 0 to 6 FAT-fs (loop4): Directory bread(block 6) failed FAT-fs (loop4): Directory bread(block 6) failed FAT-fs (loop4): Directory bread(block 6) failed loop4: detected capacity change from 0 to 4 ext4: Unknown parameter 'dont_measure' loop4: detected capacity change from 0 to 4 ext4: Unknown parameter 'dont_measure' loop4: detected capacity change from 0 to 256 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128 loop4: detected capacity change from 0 to 256 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128