===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.4/285 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.4/285: #0: ffff88800f80e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801bd9ecb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f892950 (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: 285 Comm: syz-executor.4 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: 0033:0x7f980825ac27 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:00007ffcf18370c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcf1837150 RCX: 00007f980825ac27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffcf1837150 RBP: 00007ffcf183712c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffcf1836e66 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002387b R14: 0000000000000003 R15: 00007ffcf1837190 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/285 Modules linked in: CPU: 1 UID: 0 PID: 285 Comm: syz-executor.4 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:ffff88801b8479e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880142a3700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880142a3afc RBP: ffff8880142a3700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880142a3700 R13: 0000000000000001 R14: ffffffff85c0e1e0 R15: ffff888020f48318 FS: 00005555823aa400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe6b397d18 CR3: 000000000d260000 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: 0033:0x7f980825ac27 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:00007ffcf18370c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcf1837150 RCX: 00007f980825ac27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffcf1837150 RBP: 00007ffcf183712c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffcf1836e66 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002387b R14: 0000000000000003 R15: 00007ffcf1837190 irq event stamp: 400233 hardirqs last enabled at (400233): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (400232): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (400226): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (400224): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768471290.453:13): avc: denied { write } for pid=4924 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 loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop2: detected capacity change from 0 to 264192 Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x01 length: 430 > 18 Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x01 length: 430 > 18 debugfs: '0' already exists in 'hci6' sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci6/hci6:0' CPU: 0 UID: 0 PID: 294 Comm: kworker/u11:3 Tainted: G W 6.19.0-rc5-next-20260115 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: hci6 hci_rx_work Call Trace: dump_stack_lvl+0xfa/0x120 sysfs_warn_dup+0x80/0xa0 sysfs_create_dir_ns+0x23b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_add+0x157/0x240 device_add+0x32d/0x1830 hci_conn_add_sysfs+0x117/0x1c0 le_conn_complete_evt+0x1246/0x1e40 hci_le_conn_complete_evt+0x22a/0x2c0 hci_le_meta_evt+0x34b/0x530 hci_event_packet+0x66c/0x10e0 hci_rx_work+0x65b/0x8b0 process_one_work+0x8e1/0x1960 worker_thread+0x67e/0xe90 kthread+0x385/0x490 ret_from_fork+0x67a/0x7a0 ret_from_fork_asm+0x1a/0x30 kobject: kobject_add_internal failed for hci6:0 with -EEXIST, don't try to register things with the same name in the same directory. Bluetooth: hci6: failed to register connection device loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): warning: mounting unchecked fs, running e2fsck is recommended 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. loop4: detected capacity change from 0 to 512 audit: type=1400 audit(1768471295.194:14): avc: denied { ingress } for pid=22 comm="ksoftirqd/1" saddr=127.0.0.1 src=40656 daddr=127.0.0.1 dest=35245 netif=lo scontext=system_u:object_r:sshd_exec_t:s0 tcontext=system_u:object_r:netif_t:s0 tclass=netif permissive=1 EXT4-fs (loop4): warning: mounting unchecked fs, running e2fsck is recommended audit: type=1400 audit(1768471295.194:15): avc: denied { recvfrom } for pid=22 comm="ksoftirqd/1" saddr=127.0.0.1 src=40656 daddr=127.0.0.1 dest=35245 netif=lo scontext=system_u:object_r:sshd_exec_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=node permissive=1 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. audit: type=1400 audit(1768471295.194:16): avc: denied { recv } for pid=22 comm="ksoftirqd/1" saddr=127.0.0.1 src=40656 daddr=127.0.0.1 dest=35245 netif=lo scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:sshd_exec_t:s0 tclass=peer permissive=1 loop7: detected capacity change from 0 to 512 EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop7): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. program syz-executor.1 is using a deprecated SCSI ioctl, please convert it to SG_IO EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci6: command 0x2016 tx timeout Bluetooth: hci6: command 0x2016 tx timeout