===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.5/4466 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.5/4466: #0: ffff88800f5343f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880095ee330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f428950 (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: 4466 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260115 #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: 0033:0x7f8a7df6c427 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:00007ffcc1021518 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8a7df6c427 RDX: 00007ffcc10215f7 RSI: 00007f8a7dfc7019 RDI: 00007ffcc10215e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc10213b0 R10: 00007ffcc1021267 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc10215e0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4466 Modules linked in: CPU: 0 UID: 0 PID: 4466 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260115 #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:ffff88804c2179a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801a2b8000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801a2b83fc RBP: ffff88801a2b8000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801a2b8000 R13: 0000000000000001 R14: ffffffff85c0dfb0 R15: ffff8880095eb2c0 FS: 0000555584222400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8a7dfec545 CR3: 000000000dc96000 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: 0033:0x7f8a7df6c427 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:00007ffcc1021518 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8a7df6c427 RDX: 00007ffcc10215f7 RSI: 00007f8a7dfc7019 RDI: 00007ffcc10215e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc10213b0 R10: 00007ffcc1021267 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc10215e0 irq event stamp: 175 hardirqs last enabled at (175): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (174): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (168): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (166): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- process 'syz-executor.3' launched './file1' with NULL argv: empty string added loop6: detected capacity change from 0 to 64 loop7: detected capacity change from 0 to 63 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop1: detected capacity change from 0 to 4 EXT4-fs warning (device loop1): ext4_init_metadata_csum:4643: metadata_csum and uninit_bg are redundant flags; please run fsck. EXT4-fs (loop1): VFS: Found ext4 filesystem with unknown checksum algorithm. loop7: detected capacity change from 0 to 63 loop1: detected capacity change from 0 to 4 EXT4-fs warning (device loop1): ext4_init_metadata_csum:4643: metadata_csum and uninit_bg are redundant flags; please run fsck. EXT4-fs (loop1): VFS: Found ext4 filesystem with unknown checksum algorithm. loop4: detected capacity change from 0 to 512 loop7: detected capacity change from 0 to 63 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 64 EXT4-fs (loop1): unable to read superblock FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 63 loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 4 FAT-fs (loop2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. loop2: detected capacity change from 0 to 4 FAT-fs (loop2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. EXT4-fs (loop1): unable to read superblock EXT4-fs (loop1): unable to read superblock loop2: detected capacity change from 0 to 4096 EXT4-fs (loop2): ext4_check_descriptors: Block bitmap for group 0 not in group (block 512)! EXT4-fs (loop2): group descriptors corrupted! loop2: detected capacity change from 0 to 4096 EXT4-fs (loop2): ext4_check_descriptors: Block bitmap for group 0 not in group (block 512)! EXT4-fs (loop2): group descriptors corrupted! loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): VFS: Can't find ext4 filesystem