EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.7/5543 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.7/5543: #0: ffff88800fb543f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a1b8d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a438950 (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: 5543 Comm: syz-executor.7 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: 0033:0x7f33d3347427 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:00007ffcc98b3658 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f33d3347427 RDX: 00007ffcc98b3737 RSI: 00007f33d33a2019 RDI: 00007ffcc98b3720 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc98b34f0 R10: 00007ffcc98b33a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc98b3720 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/5543 Modules linked in: CPU: 1 UID: 0 PID: 5543 Comm: syz-executor.7 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:ffff88801e6af9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b33b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801b33bafc RBP: ffff88801b33b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b33b700 R13: 0000000000000001 R14: ffffffff85c0e5f0 R15: ffff88804a1e1fb0 FS: 000055555d87b400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33d33c7547 CR3: 00000000496d1000 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: 0033:0x7f33d3347427 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:00007ffcc98b3658 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f33d3347427 RDX: 00007ffcc98b3737 RSI: 00007f33d33a2019 RDI: 00007ffcc98b3720 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc98b34f0 R10: 00007ffcc98b33a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc98b3720 irq event stamp: 209 hardirqs last enabled at (209): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (208): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (204): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (202): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop4: detected capacity change from 0 to 1312 loop0: detected capacity change from 0 to 4096 loop1: 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 error (device loop0): ext4_acquire_dquot:6991: comm syz-executor.0: Failed to acquire dquot type 1 EXT4-fs error (device loop0): ext4_acquire_dquot:6991: comm syz-executor.0: Failed to acquire dquot type 1 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. FAT-fs (loop4): error, corrupted directory (invalid entries) FAT-fs (loop4): Filesystem has been set read-only EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs error (device loop1): ext4_acquire_dquot:6991: comm syz-executor.1: Failed to acquire dquot type 1 EXT4-fs error (device loop1): ext4_acquire_dquot:6991: comm syz-executor.1: Failed to acquire dquot type 1 tmpfs: Unknown parameter '' EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. tmpfs: Unknown parameter '' loop4: detected capacity change from 0 to 1312 loop0: detected capacity change from 0 to 4096 loop3: detected capacity change from 0 to 288 loop2: detected capacity change from 0 to 1312 FAT-fs (loop4): error, corrupted directory (invalid entries) FAT-fs (loop4): Filesystem has been set read-only loop1: detected capacity change from 0 to 4096 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. loop3: detected capacity change from 0 to 288 __quota_error: 10 callbacks suppressed Quota error (device loop0): find_block_dqentry: Quota for id 0 referenced but not present Quota error (device loop1): find_block_dqentry: Quota for id 0 referenced but not present Quota error (device loop0): qtree_read_dquot: Can't read quota structure for id 0 Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0 EXT4-fs error (device loop1): ext4_acquire_dquot:6991: comm syz-executor.1: Failed to acquire dquot type 1 EXT4-fs error (device loop0): ext4_acquire_dquot:6991: comm syz-executor.0: Failed to acquire dquot type 1 tmpfs: Unknown parameter '' Quota error (device loop0): find_block_dqentry: Quota for id 0 referenced but not present Quota error (device loop0): qtree_read_dquot: Can't read quota structure for id 0 EXT4-fs error (device loop0): ext4_acquire_dquot:6991: comm syz-executor.0: Failed to acquire dquot type 1 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop2: detected capacity change from 0 to 1312 EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 1312 loop3: detected capacity change from 0 to 288 loop1: detected capacity change from 0 to 4096