===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.6/284 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.6/284: #0: ffff88800f6f83f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b844698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6fc950 (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: 284 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260113 #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: 0033:0x7f27cb23cc27 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:00007ffc53ee8ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc53ee8b60 RCX: 00007f27cb23cc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc53ee8b60 RBP: 00007ffc53ee8b3c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc53ee8876 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000050d28 R14: 0000000000000002 R15: 00007ffc53ee8ba0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/284 Modules linked in: CPU: 1 UID: 0 PID: 284 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88801b1c79e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888013e19b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888013e19f7c RBP: ffff888013e19b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888013e19b80 R13: 0000000000000001 R14: ffffffff85c0e320 R15: ffff888049eae268 FS: 000055556a08e400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f61e96e7000 CR3: 000000001ebc0000 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: 0033:0x7f27cb23cc27 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:00007ffc53ee8ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc53ee8b60 RCX: 00007f27cb23cc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc53ee8b60 RBP: 00007ffc53ee8b3c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc53ee8876 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000050d28 R14: 0000000000000002 R15: 00007ffc53ee8ba0 irq event stamp: 343577 hardirqs last enabled at (343577): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (343576): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (343572): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (343570): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs error (device loop0): __ext4_fill_super:5553: inode #2: comm syz-executor.0: iget: special inode unallocated EXT4-fs (loop0): get root inode failed EXT4-fs (loop0): mount failed FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 loop4: detected capacity change from 0 to 512 CPU: 1 UID: 0 PID: 5118 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 __kmalloc_cache_noprof+0x80/0x780 proc_self_get_link+0x1ae/0x230 pick_link+0xaff/0x1320 step_into_slowpath+0x972/0xec0 link_path_walk+0xc00/0x1c80 path_openat+0x1c7/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_openat+0x142/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f27cb1f0a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f27c87b3060 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f27cb350f60 RCX: 00007f27cb1f0a04 RDX: 0000000000000002 RSI: 00007f27c87b30f0 RDI: 00000000ffffff9c RBP: 00007f27c87b30f0 R08: 0000000000000000 R09: 00007f27c87b2f70 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffc53ee888f R14: 00007f27c87b3300 R15: 0000000000022000 EXT4-fs error (device loop4): ext4_quota_enable:7177: inode #3: comm syz-executor.4: iget: special inode unallocated EXT4-fs error (device loop4): ext4_quota_enable:7179: comm syz-executor.4: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop4): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop4): mount failed loop0: detected capacity change from 0 to 512 tmpfs: Unknown parameter '00000000000000000000000' tmpfs: Unknown parameter '00000000000000000000000' EXT4-fs error (device loop0): __ext4_fill_super:5553: inode #2: comm syz-executor.0: iget: special inode unallocated EXT4-fs (loop0): get root inode failed EXT4-fs (loop0): mount failed loop4: detected capacity change from 0 to 512 EXT4-fs error (device loop4): __ext4_fill_super:5553: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5161 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 kmem_cache_alloc_lru_noprof+0x84/0x770 __d_alloc+0x34/0xa10 d_alloc_parallel+0x112/0x13c0 lookup_open.isra.0+0x57b/0x1030 path_openat+0x15e8/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_openat+0x142/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f27cb1f0a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f27c87b3060 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f27cb350f60 RCX: 00007f27cb1f0a04 RDX: 0000000000000002 RSI: 00007f27c87b30f0 RDI: 00000000ffffff9c RBP: 00007f27c87b30f0 R08: 0000000000000000 R09: 00007f27c87b2f70 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffc53ee888f R14: 00007f27c87b3300 R15: 0000000000022000 loop0: detected capacity change from 0 to 512 EXT4-fs error (device loop0): __ext4_fill_super:5553: inode #2: comm syz-executor.0: iget: special inode unallocated EXT4-fs (loop0): get root inode failed EXT4-fs (loop0): mount failed