===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/4240 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.3/4240: #0: ffff88800f8e43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880484a6cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a840950 (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: 4240 Comm: syz-executor.3 Not tainted 6.19.0-rc5-next-20260115 #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_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4a48263b19 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:00007f4a457d9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f4a48376f60 RCX: 00007f4a48263b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00007f4a482bdf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4a5f789f R14: 00007f4a457d9300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/4240 Modules linked in: CPU: 0 UID: 0 PID: 4240 Comm: syz-executor.3 Not tainted 6.19.0-rc5-next-20260115 #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:ffff88804aa2f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880161fb700 RCX: ffffc900007dd000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880161fbafc RBP: ffff8880161fb700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880161fb700 R13: 0000000000000001 R14: ffffffff85c11070 R15: ffff8880484a1628 FS: 00007f4a457d9700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4a48373000 CR3: 0000000049b42000 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_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4a48263b19 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:00007f4a457d9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f4a48376f60 RCX: 00007f4a48263b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00007f4a482bdf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4a5f789f R14: 00007f4a457d9300 R15: 0000000000022000 irq event stamp: 185 hardirqs last enabled at (185): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (184): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (180): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (178): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768528246.504:18): avc: denied { getattr } for pid=286 comm="syz-executor.7" path="/syzkaller-testdir343172534/syzkaller.bUBZyy/9/file0" dev="sda" ino=16022 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:cpu_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1768528246.504:19): avc: denied { unlink } for pid=286 comm="syz-executor.7" name="file0" dev="sda" ino=16022 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:cpu_device_t:s0 tclass=file permissive=1 EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted 9p: Bad value for 'rfdno' tmpfs: Unknown parameter 'h]Ž>sG8@smackfs‚' syz-executor.6 (4206) used greatest stack depth: 24120 bytes left EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted tmpfs: Unknown parameter 'h]Ž>sG8@smackfs‚' audit: type=1400 audit(1768528255.518:20): avc: denied { tracepoint } for pid=4286 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 tmpfs: Unknown parameter 'h]Ž>sG8@smackfs‚' program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO loop4: detected capacity change from 0 to 16383 nfs4: Unknown parameter ']^' tmpfs: Unsupported parameter 'huge' loop4: detected capacity change from 0 to 16383 program syz-executor.0 is using a deprecated SCSI ioctl, please convert it to SG_IO tmpfs: Unknown parameter 'h]Ž>sG8@smackfs‚'