RBP: 00007f25689791d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000280 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff1d190cdf R14: 00007f2568979300 R15: 0000000000022000 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.5/5653 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.5/5653: #0: ffff88800fcd43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801ea3c698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fcb8950 (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: 5653 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: 0033:0x7f8dc54fa427 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:00007fffada6bfc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8dc54fa427 RDX: 00007fffada6c0a7 RSI: 00007f8dc5555019 RDI: 00007fffada6c090 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffada6be60 R10: 00007fffada6bd17 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fffada6c090 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.5/5653 Modules linked in: CPU: 1 UID: 0 PID: 5653 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:ffff88804945f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88805a0d5280 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88805a0d567c RBP: ffff88805a0d5280 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88805a0d5280 R13: 0000000000000001 R14: ffffffff85c0dab0 R15: ffff88801ea19628 FS: 000055557f2f5400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8dc557a545 CR3: 000000004dc85000 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: 0033:0x7f8dc54fa427 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:00007fffada6bfc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8dc54fa427 RDX: 00007fffada6c0a7 RSI: 00007f8dc5555019 RDI: 00007fffada6c090 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffada6be60 R10: 00007fffada6bd17 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fffada6c090 irq event stamp: 285 hardirqs last enabled at (285): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (284): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (280): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (278): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FAULT_INJECTION: forcing a failure. name fail_futex, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 5664 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260114 #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_fail_futex+0x4d/0x80 futex_lock_pi_atomic+0x148/0xb70 futex_lock_pi+0x20f/0x7a0 do_futex+0x12d/0x370 __x64_sys_futex+0x1c9/0x4d0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f256b403b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f2568979188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f256b516f60 RCX: 00007f256b403b19 RDX: 0000000000000000 RSI: 000000000000000d RDI: 0000000020000240 RBP: 00007f25689791d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000280 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff1d190cdf R14: 00007f2568979300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_futex, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5672 Comm: syz-executor.4 Tainted: G W 6.19.0-rc5-next-20260114 #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 get_futex_key+0xf75/0x1510 futex_lock_pi+0x1af/0x7a0 do_futex+0x12d/0x370 __x64_sys_futex+0x1c9/0x4d0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9b1ca94b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f9b1a00a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f9b1cba7f60 RCX: 00007f9b1ca94b19 RDX: 0000000000000000 RSI: 000000000000000d RDI: 0000000020000240 RBP: 00007f9b1a00a1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000280 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc89f09b5f R14: 00007f9b1a00a300 R15: 0000000000022000 cgroup: fork rejected by pids controller in /syz7 FAULT_INJECTION: forcing a failure. name fail_futex, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 5734 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260114 #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_fail_futex+0x4d/0x80 lock_pi_update_atomic+0x1f/0x140 futex_lock_pi_atomic+0x1cd/0xb70 futex_lock_pi+0x20f/0x7a0 do_futex+0x12d/0x370 __x64_sys_futex+0x1c9/0x4d0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f256b403b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f2568979188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f256b516f60 RCX: 00007f256b403b19 RDX: 0000000000000000 RSI: 000000000000000d RDI: 0000000020000240 RBP: 00007f25689791d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000280 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fff1d190cdf R14: 00007f2568979300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name fail_futex, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5755 Comm: syz-executor.4 Tainted: G W 6.19.0-rc5-next-20260114 #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_fail_futex+0x4d/0x80 futex_lock_pi_atomic+0x102/0xb70 futex_lock_pi+0x20f/0x7a0 do_futex+0x12d/0x370 __x64_sys_futex+0x1c9/0x4d0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9b1ca94b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f9b1a00a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f9b1cba7f60 RCX: 00007f9b1ca94b19 RDX: 0000000000000000 RSI: 000000000000000d RDI: 0000000020000240 RBP: 00007f9b1a00a1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000280 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc89f09b5f R14: 00007f9b1a00a300 R15: 0000000000022000