===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/6261 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.2/6261: #0: ffff88800fa243f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a9116f0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fc68950 (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: 6261 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_mkdirat+0x92/0xf0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb7f1ccb19 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:00007fdb7c742188 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fdb7f2dff60 RCX: 00007fdb7f1ccb19 RDX: 00000000000000c8 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007fdb7f226f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef506ec8f R14: 00007fdb7c742300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/6261 Modules linked in: CPU: 1 UID: 0 PID: 6261 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:ffff8880487f79d8 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880494c0000 RCX: ffffc900009ee000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880494c03fc RBP: ffff8880494c0000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880494c0000 R13: 0000000000000001 R14: ffffffff85c0ea50 R15: ffff88801af66268 FS: 00007fdb7c742700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb7f2dc000 CR3: 00000000141e3000 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_mkdirat+0x92/0xf0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb7f1ccb19 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:00007fdb7c742188 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fdb7f2dff60 RCX: 00007fdb7f1ccb19 RDX: 00000000000000c8 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007fdb7f226f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef506ec8f R14: 00007fdb7c742300 R15: 0000000000022000 irq event stamp: 2023 hardirqs last enabled at (2023): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (2022): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (2018): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (2016): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 140 EXT4-fs (loop7): unmounting filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09. EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: checksum invalid loop5: detected capacity change from 0 to 140 EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: checksum invalid EXT4-fs (loop5): get root inode failed loop0: detected capacity change from 0 to 76 EXT4-fs (loop5): mount failed EXT4-fs (loop0): bad geometry: block count 64 exceeds size of device (38 blocks) loop7: detected capacity change from 0 to 140 EXT4-fs error (device loop7): __ext4_fill_super:5560: inode #2: comm syz-executor.7: iget: checksum invalid EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop7: detected capacity change from 0 to 140 loop3: detected capacity change from 0 to 76 EXT4-fs error (device loop7): __ext4_fill_super:5560: inode #2: comm syz-executor.7: iget: checksum invalid EXT4-fs (loop3): bad geometry: block count 64 exceeds size of device (38 blocks) EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop5: detected capacity change from 0 to 140 loop0: detected capacity change from 0 to 76 loop2: detected capacity change from 0 to 140 EXT4-fs (loop0): bad geometry: block count 64 exceeds size of device (38 blocks) EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: checksum invalid EXT4-fs (loop5): get root inode failed EXT4-fs error (device loop2): __ext4_fill_super:5560: inode #2: comm syz-executor.2: iget: checksum invalid EXT4-fs (loop5): mount failed EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed loop0: detected capacity change from 0 to 140 EXT4-fs error (device loop0): __ext4_fill_super:5560: inode #2: comm syz-executor.0: iget: checksum invalid EXT4-fs (loop0): get root inode failed EXT4-fs (loop0): mount failed loop5: detected capacity change from 0 to 140 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: iget: checksum invalid EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed