===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.0/276 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.0/276: #0: ffff88800fa3a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801d5ec698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa3e950 (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: 276 Comm: syz-executor.0 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ce1a51c27 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:00007ffde0958bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffde0958c40 RCX: 00007f3ce1a51c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffde0958c40 RBP: 00007ffde0958c1c R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffde0958955 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000239f6 R14: 0000000000000003 R15: 00007ffde0958c80 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/276 Modules linked in: CPU: 1 UID: 0 PID: 276 Comm: syz-executor.0 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:ffff88801c4d79e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016c13700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff888016c13afc RBP: ffff888016c13700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016c13700 R13: 0000000000000001 R14: ffffffff85c0f2c0 R15: ffff88805c8d58e0 FS: 0000555588435400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555562065c58 CR3: 000000000d34b000 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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ce1a51c27 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:00007ffde0958bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffde0958c40 RCX: 00007f3ce1a51c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffde0958c40 RBP: 00007ffde0958c1c R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffde0958955 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000239f6 R14: 0000000000000003 R15: 00007ffde0958c80 irq event stamp: 687629 hardirqs last enabled at (687629): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (687628): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (687622): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (687620): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop0: detected capacity change from 0 to 4096 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 4096 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 4096 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 4096 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs: dax option not supported EXT4-fs: dax option not supported EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs: dax option not supported EXT4-fs: dax option not supported Bluetooth: hci7: command 0x0405 tx timeout EXT4-fs: dax option not supported syz-executor.1 uses obsolete (PF_INET,SOCK_PACKET) Bluetooth: hci7: command 0x0405 tx timeout Bluetooth: hci7: command 0x0405 tx timeout netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. EXT4-fs (sda): Can't modify superblock whileperforming online resize EXT4-fs (sda): Can't modify superblock whileperforming online resize Bluetooth: hci7: command 0x0405 tx timeout blktrace: Concurrent blktraces are not allowed on sg0 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci2: ACL packet for unknown connection handle 2745 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: ACL packet for unknown connection handle 2745 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci2: ACL packet for unknown connection handle 2745 Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci0: ISO packet for unknown connection handle 1106 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: hci2: ISO packet for unknown connection handle 1106 loop4: detected capacity change from 0 to 184 Bluetooth: hci7: command 0x0405 tx timeout