loop3: detected capacity change from 0 to 8 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.1/6806 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.1/6806: #0: ffff88800fb7e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880484703e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fd12950 (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: 6806 Comm: syz-executor.1 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: 0033:0x7faa37363427 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:00007ffddacc75d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa37363427 RDX: 00007ffddacc76b7 RSI: 00007faa373be019 RDI: 00007ffddacc76a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffddacc7470 R10: 00007ffddacc7327 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffddacc76a0 EXT4-fs (loop3): bad geometry: block count 128 exceeds size of device (2 blocks) ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/6806 Modules linked in: CPU: 1 UID: 0 PID: 6806 Comm: syz-executor.1 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:ffff88804a8079a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048f08000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888048f083fc RBP: ffff888048f08000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048f08000 R13: 0000000000000001 R14: ffffffff85c0d560 R15: ffff88804874ebf0 FS: 000055555c4d4400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa373e3541 CR3: 0000000013f23000 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: 0033:0x7faa37363427 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:00007ffddacc75d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa37363427 RDX: 00007ffddacc76b7 RSI: 00007faa373be019 RDI: 00007ffddacc76a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffddacc7470 R10: 00007ffddacc7327 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffddacc76a0 irq event stamp: 181 hardirqs last enabled at (181): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (180): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (176): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (174): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 5 EXT4-fs (loop3): bad geometry: block count 128 exceeds size of device (1 blocks) loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop3: detected capacity change from 0 to 5 EXT4-fs (loop3): bad geometry: block count 128 exceeds size of device (1 blocks) loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed