===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.1/4013 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.1/4013: #0: ffff88800f9523f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b1783e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f956950 (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: 4013 Comm: syz-executor.1 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: 0033:0x7fa28c6a8427 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:00007ffe2e489568 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa28c6a8427 RDX: 00007ffe2e489643 RSI: 00007fa28c703022 RDI: 00007ffe2e489630 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe2e489400 R10: 00007ffe2e4892b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe2e489630 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/4013 Modules linked in: CPU: 0 UID: 0 PID: 4013 Comm: syz-executor.1 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:ffff8880190879a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801a9f9b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801a9f9f7c RBP: ffff88801a9f9b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801a9f9b80 R13: 0000000000000001 R14: ffffffff85c0d970 R15: ffff88801b34c5d0 FS: 000055558e8d7400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa28c728541 CR3: 000000004884c000 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: 0033:0x7fa28c6a8427 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:00007ffe2e489568 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa28c6a8427 RDX: 00007ffe2e489643 RSI: 00007fa28c703022 RDI: 00007ffe2e489630 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe2e489400 R10: 00007ffe2e4892b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe2e489630 irq event stamp: 287 hardirqs last enabled at (287): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (286): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (282): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (280): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768370964.196:10): avc: denied { watch_reads } for pid=4026 comm="syz-executor.6" path="/syzkaller-testdir008798912/syzkaller.aLzcyE/4" dev="sda" ino=15976 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768370964.492:11): avc: denied { write } for pid=4034 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 loop0: detected capacity change from 0 to 8 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): FAT read failed (blocknr 32) random: crng reseeded on system resumption Unrecognized hibernate image header format! PM: hibernation: Image mismatch: architecture specific data random: crng reseeded on system resumption Unrecognized hibernate image header format! PM: hibernation: Image mismatch: architecture specific data audit: type=1400 audit(1768370964.625:12): avc: denied { map } for pid=4053 comm="syz-executor.4" path="pipe:[5643]" dev="pipefs" ino=5643 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 audit: type=1400 audit(1768370964.625:13): avc: denied { execute } for pid=4053 comm="syz-executor.4" path="pipe:[5643]" dev="pipefs" ino=5643 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 loop0: detected capacity change from 0 to 8 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): FAT read failed (blocknr 32) perf: interrupt took too long (3995 > 3982), lowering kernel.perf_event_max_sample_rate to 50000 perf: interrupt took too long (6272 > 6266), lowering kernel.perf_event_max_sample_rate to 31000 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16