===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/4667 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.2/4667: #0: ffff88800f91c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801a91d9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f928950 (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: 4667 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260116 #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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc2efc88427 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:00007ffdfb6d76e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc2efc88427 RDX: 00007ffdfb6d77c7 RSI: 00007fc2efce3019 RDI: 00007ffdfb6d77b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdfb6d7580 R10: 00007ffdfb6d7437 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffdfb6d77b0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.2/4667 Modules linked in: CPU: 0 UID: 0 PID: 4667 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260116 #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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88801ef979a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801ac91b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801ac91f7c RBP: ffff88801ac91b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801ac91b80 R13: 0000000000000001 R14: ffffffff85c0f2c0 R15: ffff88804a116268 FS: 0000555560bb5400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc2efd08542 CR3: 00000000161df000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc2efc88427 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:00007ffdfb6d76e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc2efc88427 RDX: 00007ffdfb6d77c7 RSI: 00007fc2efce3019 RDI: 00007ffdfb6d77b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdfb6d7580 R10: 00007ffdfb6d7437 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffdfb6d77b0 irq event stamp: 555 hardirqs last enabled at (555): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (554): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (550): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (548): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- vfat: Unknown parameter 't' loop2: detected capacity change from 0 to 10 vfat: Bad value for 'shortname' loop2: detected capacity change from 0 to 100 tmpfs: Bad value for 'mode' loop2: detected capacity change from 0 to 10 vfat: Bad value for 'shortname' loop2: detected capacity change from 0 to 100 tmpfs: Bad value for 'mode' loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): inodes count not valid: 8224 vs 32 SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22 audit: type=1400 audit(1768733973.752:16): avc: denied { watch_reads } for pid=4709 comm="syz-executor.2" path="/syzkaller-testdir632098980/syzkaller.TjczZ1/27" dev="sda" ino=15986 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): inodes count not valid: 8224 vs 32 SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22 netlink: 188 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 188 bytes leftover after parsing attributes in process `syz-executor.7'. loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop3): group descriptors corrupted! netlink: 188 bytes leftover after parsing attributes in process `syz-executor.7'. loop5: detected capacity change from 0 to 2048 ext4: Unknown parameter '+CÏùÉ’JísèWõWÁÅ6†(?Ë쨗…­Â®Xê­Õ;ùåWÚøÿód´ºÕž~ËsbƒÊå$¾àï¬' loop5: detected capacity change from 0 to 2048