===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.5/4205 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.5/4205: #0: ffff88800fc0e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b2d5020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa02950 (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: 4205 Comm: syz-executor.5 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: 0033:0x7f5994308427 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:00007ffd569d67f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5994308427 RDX: 00007ffd569d68d7 RSI: 00007f5994363019 RDI: 00007ffd569d68c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd569d6690 R10: 00007ffd569d6547 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffd569d68c0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4205 Modules linked in: CPU: 0 UID: 0 PID: 4205 Comm: syz-executor.5 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:ffff88801e6cf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801e570000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801e5703fc RBP: ffff88801e570000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801e570000 R13: 0000000000000001 R14: ffffffff85c0ddd0 R15: ffff88801b2d6bf0 FS: 000055557b70e400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5994388545 CR3: 0000000009ee9000 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: 0033:0x7f5994308427 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:00007ffd569d67f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5994308427 RDX: 00007ffd569d68d7 RSI: 00007f5994363019 RDI: 00007ffd569d68c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd569d6690 R10: 00007ffd569d6547 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffd569d68c0 irq event stamp: 225 hardirqs last enabled at (225): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (224): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (216): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (214): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 276 loop1: detected capacity change from 0 to 276 loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. IPv6: NLM_F_REPLACE set, but no existing node found! Bluetooth: MGMT ver 1.23 loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci7: command 0x0405 tx timeout loop5: detected capacity change from 0 to 2048 rfkill: input handler disabled loop7: detected capacity change from 0 to 2320 IPv6: NLM_F_REPLACE set, but no existing node found! loop3: detected capacity change from 0 to 276 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) rfkill: input handler enabled ISO 9660 Extensions: Microsoft Joliet Level 3 rfkill: input handler disabled ISO 9660 Extensions: RRIP_1991A EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. rfkill: input handler enabled loop1: detected capacity change from 0 to 1024 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. loop5: detected capacity change from 0 to 276 loop3: detected capacity change from 0 to 276 loop4: detected capacity change from 0 to 368 loop7: detected capacity change from 0 to 2320 EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A