===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.0/4840 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.0/4840: #0: ffff88800f8d23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b942078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8d6950 (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: 4840 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260115 #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: 0033:0x7ff64c91c427 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:00007ffe31d474e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff64c91c427 RDX: 00007ffe31d475c7 RSI: 00007ff64c977019 RDI: 00007ffe31d475b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe31d47380 R10: 00007ffe31d47237 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe31d475b0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/4840 Modules linked in: CPU: 0 UID: 0 PID: 4840 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260115 #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:ffff888016dd79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801e7a0000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801e7a03fc RBP: ffff88801e7a0000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801e7a0000 R13: 0000000000000001 R14: ffffffff85c0dce0 R15: ffff8880095c8318 FS: 000055556dbb9400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff64c99c540 CR3: 000000001e329000 CR4: 0000000000350ef0 Call Trace: __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: 0033:0x7ff64c91c427 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:00007ffe31d474e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff64c91c427 RDX: 00007ffe31d475c7 RSI: 00007ff64c977019 RDI: 00007ffe31d475b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe31d47380 R10: 00007ffe31d47237 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe31d475b0 irq event stamp: 175 hardirqs last enabled at (175): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (174): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (170): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (168): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 0 (only 16 groups) loop2: detected capacity change from 0 to 2048 EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) EXT4-fs error (device loop2): ext4_ext_check_inode:528: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid magic - magic 0, entries 0, max 0(0), depth 0(0) EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 64 (only 16 groups) loop2: detected capacity change from 0 to 2048 EXT4-fs error (device loop2): ext4_ext_check_inode:528: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid magic - magic 0, entries 0, max 0(0), depth 0(0) EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed