===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.4/3947 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.4/3947: #0: ffff88800fb2e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c14e330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fb3a950 (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: 3947 Comm: syz-executor.4 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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa134adb427 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:00007ffe4a62f5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa134adb427 RDX: 00007ffe4a62f697 RSI: 00007fa134b36019 RDI: 00007ffe4a62f680 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe4a62f450 R10: 00007ffe4a62f307 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe4a62f680 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/3947 Modules linked in: CPU: 0 UID: 0 PID: 3947 Comm: syz-executor.4 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:ffff88804a7779a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801ab1b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801ab1bafc RBP: ffff88801ab1b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801ab1b700 R13: 0000000000000001 R14: ffffffff85c10300 R15: ffff88801c3ecf58 FS: 0000555591694400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa134b5b544 CR3: 000000001eb72000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa134adb427 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:00007ffe4a62f5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa134adb427 RDX: 00007ffe4a62f697 RSI: 00007fa134b36019 RDI: 00007ffe4a62f680 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe4a62f450 R10: 00007ffe4a62f307 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe4a62f680 irq event stamp: 179 hardirqs last enabled at (179): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (178): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (172): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (170): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO syz-executor.6 (3972) used greatest stack depth: 23408 bytes left SELinux: Context /usr/lib/telepathy/mission-control-5 is not valid (left unmapped). audit: type=1400 audit(1768824302.323:11): avc: denied { write } for pid=3992 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 audit: type=1400 audit(1768824302.417:12): avc: denied { block_suspend } for pid=4016 comm="syz-executor.2" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported loop0: detected capacity change from 0 to 127 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop0: detected capacity change from 0 to 7 vfat: Unknown parameter 'uni_xlattf8' loop0: detected capacity change from 0 to 1 loop0: detected capacity change from 0 to 264192 vfat: Unknown parameter 'fowner>18446744073709551615' loop0: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 512 EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: special inode unallocated EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed loop0: detected capacity change from 0 to 127 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop0: detected capacity change from 0 to 7 vfat: Unknown parameter 'uni_xlattf8' loop1: detected capacity change from 0 to 512 EXT4-fs warning (device loop1): ext4_multi_mount_protect:393: Unable to create kmmpd thread for loop1. loop0: detected capacity change from 0 to 1 vfat: Unknown parameter 'fowner>18446744073709551615'