loop1: detected capacity change from 0 to 111 FAT-fs (loop1): invalid media value (0xc9) FAT-fs (loop1): Can't find a valid FAT filesystem ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.0/5096 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.0/5096: #0: ffff88800f8263f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88802067f640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f82c950 (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: 5096 Comm: syz-executor.0 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_mknod+0x2eb/0x4f0 vfs_mknod+0x6a9/0xb20 unix_bind+0x31e/0x1300 __sys_bind+0x1dd/0x2b0 __x64_sys_bind+0x73/0xb0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe646ff8b19 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:00007fe64452c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00007fe64710c0e0 RCX: 00007fe646ff8b19 RDX: 000000000000006e RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fe647052f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd9fc23d9f R14: 00007fe64452c300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/5096 Modules linked in: CPU: 1 UID: 0 PID: 5096 Comm: syz-executor.0 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:ffff88804dcdf870 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801abb5280 RCX: ffffc90001695000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801abb567c RBP: ffff88801abb5280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801abb5280 R13: 0000000000000001 R14: ffffffff85c0e4b0 R15: ffff888020679fb0 FS: 00007fe64452c700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe64452c718 CR3: 000000004e89d000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mknod+0x2eb/0x4f0 vfs_mknod+0x6a9/0xb20 unix_bind+0x31e/0x1300 __sys_bind+0x1dd/0x2b0 __x64_sys_bind+0x73/0xb0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe646ff8b19 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:00007fe64452c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00007fe64710c0e0 RCX: 00007fe646ff8b19 RDX: 000000000000006e RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fe647052f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd9fc23d9f R14: 00007fe64452c300 R15: 0000000000022000 irq event stamp: 231 hardirqs last enabled at (231): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (230): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (226): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (224): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 512 loop1: detected capacity change from 0 to 111 FAT-fs (loop1): invalid media value (0xc9) FAT-fs (loop1): Can't find a valid FAT filesystem EXT4-fs (loop3): VFS: Can't find ext4 filesystem loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): VFS: Can't find ext4 filesystem loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768782720.152:15): avc: denied { read } for pid=5154 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 9pnet_virtio: no channels available for device ./file0/file0 9pnet_virtio: no channels available for device ./file0/file0