===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.7/5361 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.7/5361: #0: ffff88800fa243f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801a9c6cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f948950 (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: 5361 Comm: syz-executor.7 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: 0033:0x7fab15da0427 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:00007ffc3c1b3378 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fab15da0427 RDX: 00007ffc3c1b3453 RSI: 00007fab15dfb022 RDI: 00007ffc3c1b3440 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc3c1b3210 R10: 00007ffc3c1b30c7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc3c1b3440 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/5361 Modules linked in: CPU: 1 UID: 0 PID: 5361 Comm: syz-executor.7 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:ffff888049a979a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800dbb9b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800dbb9f7c RBP: ffff88800dbb9b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800dbb9b80 R13: 0000000000000001 R14: ffffffff85c0edc0 R15: ffff88801aaf9628 FS: 000055555f3d3400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fab15e20547 CR3: 000000001ebac000 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: 0033:0x7fab15da0427 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:00007ffc3c1b3378 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fab15da0427 RDX: 00007ffc3c1b3453 RSI: 00007fab15dfb022 RDI: 00007ffc3c1b3440 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc3c1b3210 R10: 00007ffc3c1b30c7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc3c1b3440 irq event stamp: 329 hardirqs last enabled at (329): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (328): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (322): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (320): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO loop4: detected capacity change from 0 to 8 loop4: detected capacity change from 0 to 8 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 UID: 0 PID: 5412 Comm: syz-executor.2 Tainted: G W 6.19.0-rc5-next-20260116 #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 _copy_from_user+0x30/0xd0 copy_from_sockptr_offset.constprop.0+0x167/0x1a0 do_ipv6_setsockopt+0xb21/0x47f0 ipv6_setsockopt+0xcb/0x170 udpv6_setsockopt+0x84/0xd0 do_sock_setsockopt+0xf7/0x1e0 __sys_setsockopt+0x11f/0x1a0 __x64_sys_setsockopt+0xbe/0x160 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb94eb3eb19 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:00007fb94c0b4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fb94ec51f60 RCX: 00007fb94eb3eb19 RDX: 0000000000000014 RSI: 0000000000000029 RDI: 0000000000000004 RBP: 00007fb94c0b41d0 R08: 0000000000000014 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff355f6ecf R14: 00007fb94c0b4300 R15: 0000000000022000