===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.3/4560 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.3/4560: #0: ffff88800f8483f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888013d1c698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f84c950 (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: 4560 Comm: syz-executor.3 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: 0033:0x7f60e9c29427 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:00007ffe08874da8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f60e9c29427 RDX: 00007ffe08874e87 RSI: 00007f60e9c84019 RDI: 00007ffe08874e70 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe08874c40 R10: 00007ffe08874af7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe08874e70 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/4560 Modules linked in: CPU: 1 UID: 0 PID: 4560 Comm: syz-executor.3 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:ffff888053e979a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a528000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88804a5283fc RBP: ffff88804a528000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a528000 R13: 0000000000000001 R14: ffffffff85c0cc50 R15: ffff888013c5f578 FS: 000055557e6e7400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f60e9ca9543 CR3: 000000000ce41000 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: 0033:0x7f60e9c29427 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:00007ffe08874da8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f60e9c29427 RDX: 00007ffe08874e87 RSI: 00007f60e9c84019 RDI: 00007ffe08874e70 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe08874c40 R10: 00007ffe08874af7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe08874e70 irq event stamp: 161 hardirqs last enabled at (161): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (160): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (154): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (152): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium __nla_validate_parse: 4 callbacks suppressed netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' syz-executor.6 (4613) used greatest stack depth: 23864 bytes left netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. 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. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' loop5: detected capacity change from 0 to 512 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ieee80211 phy22: Selected rate control algorithm 'minstrel_ht' 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. UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list ieee802154 phy0 wpan0: encryption failed: -22 Bluetooth: unknown link type 6 Bluetooth: hci5: connection err: -111 ieee802154 phy0 wpan0: encryption failed: -22 Bluetooth: Unexpected continuation frame (len 16) Bluetooth: unknown link type 6 Bluetooth: hci5: connection err: -111 Bluetooth: Unexpected start frame (len 10) ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 syz-executor.1 (284) used greatest stack depth: 23776 bytes left Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci5: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci5: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci5: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci5: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci5: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci0: command tx timeout Bluetooth: hci1: command tx timeout Bluetooth: hci5: command tx timeout Bluetooth: hci3: command tx timeout Bluetooth: hci0: command tx timeout Bluetooth: hci1: command tx timeout