===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.7/4807 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.7/4807: #0: ffff88800f5f43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88802063f640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa08950 (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: 4807 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260114 #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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc78111f427 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:00007ffefd8970d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc78111f427 RDX: ffffffffffffffbc RSI: 00007fc78117a00e RDI: 00007fc7811791dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffefd896b50 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffefd8971a0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/4807 Modules linked in: CPU: 0 UID: 0 PID: 4807 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88801dc679a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801ab73700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801ab73afc RBP: ffff88801ab73700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801ab73700 R13: 0000000000000001 R14: ffffffff85c0fea0 R15: ffff88801b1ebc48 FS: 00005555599da400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe809eb73a4 CR3: 000000000ddbd000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc78111f427 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:00007ffefd8970d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc78111f427 RDX: ffffffffffffffbc RSI: 00007fc78117a00e RDI: 00007fc7811791dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffefd896b50 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffefd8971a0 irq event stamp: 965 hardirqs last enabled at (965): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (964): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (960): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (958): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- syz-executor.7 (4812) used greatest stack depth: 24304 bytes left loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed loop6: detected capacity change from 0 to 6 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 (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed audit: type=1400 audit(1768381811.279:13): avc: denied { tracepoint } for pid=4891 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 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 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 loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. 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 EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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 loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci0: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci0: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci0: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci0: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci0: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci0: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci6: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci6: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci0: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci0: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci6: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci6: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci6: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci6: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 Bluetooth: hci0: unexpected subevent 0x0e length: 30 > 15 Bluetooth: hci0: Unable to find connection for dst 00:00:00:00:00:00 sid 0x00 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 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 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 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 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 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 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 audit: type=1326 audit(1768381818.404:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5421 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc141f47b19 code=0x0 audit: type=1326 audit(1768381819.229:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5421 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc141f47b19 code=0x0 audit: type=1326 audit(1768381819.330:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5458 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fc141f47b19 code=0x0 Bluetooth: hci5: unexpected event 0x01 length: 4 > 1