audit: type=1326 audit(1768382688.723:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4222 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f3dc0374b19 code=0x7ffc0000 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.4/4239 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.4/4239: #0: ffff88800f7a43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880499a83e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7b0950 (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: 4239 Comm: syz-executor.4 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: 0033:0x7f4b6fb34427 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:00007ffd87712378 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4b6fb34427 RDX: 00007ffd87712457 RSI: 00007f4b6fb8f019 RDI: 00007ffd87712440 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd87712210 R10: 00007ffd877120c7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd87712440 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/4239 Modules linked in: CPU: 1 UID: 0 PID: 4239 Comm: syz-executor.4 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:ffff88804a5979a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048b9b700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff888048b9bafc RBP: ffff888048b9b700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048b9b700 R13: 0000000000000001 R14: ffffffff85c0dec0 R15: ffff88804996d8e0 FS: 0000555563395400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b6fbb4544 CR3: 00000000486ae000 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: 0033:0x7f4b6fb34427 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:00007ffd87712378 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4b6fb34427 RDX: 00007ffd87712457 RSI: 00007f4b6fb8f019 RDI: 00007ffd87712440 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd87712210 R10: 00007ffd877120c7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd87712440 irq event stamp: 1627 hardirqs last enabled at (1627): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (1625): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (1626): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (1211): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- Bluetooth: hci2: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci2: Injecting HCI hardware error event Bluetooth: hci2: hardware error 0x00 Bluetooth: hci0: Opcode 0x0c1a failed: -110 Bluetooth: hci0: Opcode 0x0406 failed: -4 Bluetooth: hci0: Opcode 0x0406 failed: -4 Bluetooth: hci1: Opcode 0x0c1a failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0406 failed: -4 Bluetooth: hci6: Opcode 0x0c1a failed: -4 Bluetooth: hci6: Opcode 0x0406 failed: -4 Bluetooth: hci6: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 Bluetooth: hci2: unexpected event for opcode 0x4241 Bluetooth: hci2: unexpected event for opcode 0x4241 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci2: unexpected event for opcode 0x4241 loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. Bluetooth: hci2: unexpected event for opcode 0x4241 Bluetooth: hci5: unexpected event for opcode 0x20e5 kauditd_printk_skb: 26 callbacks suppressed audit: type=1400 audit(1768382693.574:47): avc: denied { block_suspend } for pid=4439 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 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci4: ACL packet for unknown connection handle 200 Bluetooth: hci4: unexpected event for opcode 0x4241 Bluetooth: hci5: ACL packet for unknown connection handle 200 Bluetooth: hci2: unexpected event for opcode 0x4241 Bluetooth: hci5: unexpected event for opcode 0x20e5 Bluetooth: hci5: ACL packet for unknown connection handle 200 Bluetooth: hci4: ACL packet for unknown connection handle 200 Bluetooth: hci4: unexpected event for opcode 0x4241 Bluetooth: hci0: unexpected event for opcode 0x20e5 Bluetooth: hci4: ACL packet for unknown connection handle 200 Bluetooth: hci4: unexpected event for opcode 0x4241 Bluetooth: hci5: unexpected event for opcode 0x20e5 Bluetooth: hci2: unexpected event for opcode 0x20e5 Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci2: Opcode 0x0c03 failed: -110 Bluetooth: hci0: ACL packet for unknown connection handle 200 Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci5: ACL packet for unknown connection handle 200 Bluetooth: hci0: unexpected event for opcode 0x20e5 Bluetooth: hci0: ACL packet for unknown connection handle 200 Bluetooth: hci5: unexpected event for opcode 0x20e5 Bluetooth: hci0: unexpected event for opcode 0x20e5 Bluetooth: hci5: ACL packet for unknown connection handle 200 Bluetooth: hci0: ACL packet for unknown connection handle 200 Bluetooth: hci5: unexpected event for opcode 0x20e5 Bluetooth: hci5: ACL packet for unknown connection handle 200 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium tmpfs: Unknown parameter './file0' mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop4: detected capacity change from 0 to 512 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 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 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 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 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 Bluetooth: hci1: command 0x0c1a tx timeout 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. Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium Bluetooth: hci4: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci4: Injecting HCI hardware error event Bluetooth: hci4: hardware error 0x00 loop4: detected capacity change from 0 to 264192 loop4: detected capacity change from 0 to 264192 sg_write: data in/out 327644/44 bytes for SCSI command 0x4-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly sg_write: data in/out 327644/44 bytes for SCSI command 0x4-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly Bluetooth: hci1: command 0x0c1a tx timeout loop4: detected capacity change from 0 to 264192 Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci3: Opcode 0x0401 failed: -110 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 loop4: detected capacity change from 0 to 264192