loop5: detected capacity change from 0 to 4 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.0/6715 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.0/6715: #0: ffff88800f95e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c7a6330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f9aa950 (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: 6715 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4dff8b9427 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:00007ffe75bdca28 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4dff8b9427 RDX: 00007ffe75bdcb07 RSI: 00007f4dff914019 RDI: 00007ffe75bdcaf0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe75bdc8c0 R10: 00007ffe75bdc777 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe75bdcaf0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/6715 Modules linked in: CPU: 1 UID: 0 PID: 6715 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88801b39f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804cc98000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88804cc983fc RBP: ffff88804cc98000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804cc98000 R13: 0000000000000001 R14: ffffffff85c0c520 R15: ffff88801c7a1628 FS: 000055555ea8b400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4dff939540 CR3: 000000004d719000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4dff8b9427 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:00007ffe75bdca28 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4dff8b9427 RDX: 00007ffe75bdcb07 RSI: 00007f4dff914019 RDI: 00007ffe75bdcaf0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe75bdc8c0 R10: 00007ffe75bdc777 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe75bdcaf0 irq event stamp: 199 hardirqs last enabled at (199): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (198): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (194): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (192): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 248 ISO 9660 Extensions: Microsoft Joliet Level 3 EXT4-fs (loop5): fragment/cluster size (32768) != block size (2048) ISOFS: changing to secondary root No source specified No source specified loop3: detected capacity change from 0 to 248 loop2: detected capacity change from 0 to 248 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop2: detected capacity change from 0 to 248 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop5: detected capacity change from 0 to 4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1548 sclass=netlink_route_socket pid=6757 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1548 sclass=netlink_route_socket pid=6757 comm=syz-executor.7 No source specified loop3: detected capacity change from 0 to 248 No source specified EXT4-fs (loop5): fragment/cluster size (32768) != block size (2048) ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop2: detected capacity change from 0 to 248 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop7: detected capacity change from 0 to 248 No source specified ISO 9660 Extensions: Microsoft Joliet Level 3 loop5: detected capacity change from 0 to 4 No source specified ISOFS: changing to secondary root EXT4-fs (loop5): VFS: Can't find ext4 filesystem loop3: detected capacity change from 0 to 248