loop5: detected capacity change from 0 to 240 ISOFS: root inode is unusable. Disabling Rock Ridge and switching to Joliet. isofs_fill_super: root inode is not a directory. Corrupted media? ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.5/285 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.5/285: #0: ffff88800f3a23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b6359a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f3a6950 (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: 285 Comm: syz-executor.5 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd9d2b81c27 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 53 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:00007ffcb66c4d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcb66c4db0 RCX: 00007fd9d2b81c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffcb66c4db0 RBP: 00007ffcb66c4d8c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffcb66c4ac6 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000069bd4 R14: 0000000000000001 R15: 00007ffcb66c4df0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/285 Modules linked in: CPU: 0 UID: 0 PID: 285 Comm: syz-executor.5 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:ffff888016b479e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f3b3700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88800f3b3afc RBP: ffff88800f3b3700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f3b3700 R13: 0000000000000001 R14: ffffffff85c0e190 R15: ffff88804aa1f578 FS: 00005555884c4400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555884d5c98 CR3: 000000000bbee000 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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd9d2b81c27 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 53 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:00007ffcb66c4d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcb66c4db0 RCX: 00007fd9d2b81c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffcb66c4db0 RBP: 00007ffcb66c4d8c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffcb66c4ac6 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000069bd4 R14: 0000000000000001 R15: 00007ffcb66c4df0 irq event stamp: 515791 hardirqs last enabled at (515791): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (515790): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (515786): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (515784): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop5: detected capacity change from 0 to 240 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: root inode is unusable. Disabling Rock Ridge and switching to Joliet. ISOFS: changing to secondary root isofs_fill_super: root inode is not a directory. Corrupted media? FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 UID: 0 PID: 5728 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_cache_noprof+0x80/0x780 alloc_pipe_info+0x10d/0x5a0 splice_direct_to_actor+0x78c/0x9d0 do_splice_direct+0x179/0x250 do_sendfile+0xa8e/0xdc0 __x64_sys_sendfile64+0x1d3/0x210 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f86c6c47b19 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:00007f86c41bd188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 loop1: detected capacity change from 0 to 4 RAX: ffffffffffffffda RBX: 00007f86c6d5af60 RCX: 00007f86c6c47b19 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007f86c41bd1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000a0103 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe0056506f R14: 00007f86c41bd300 R15: 0000000000022000 EXT4-fs (loop1): Can't read superblock on 2nd try loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): Can't read superblock on 2nd try