===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.4/3958 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.4/3958: #0: ffff88800f8b03f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804c0a59a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8b4950 (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: 3958 Comm: syz-executor.4 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_symlink+0x406/0xb40 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: 0033:0x7fdff3f58427 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:00007ffc4a399df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdff3f58427 RDX: 00007ffc4a399ed3 RSI: 00007fdff3fb3022 RDI: 00007ffc4a399ec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc4a399c90 R10: 00007ffc4a399b47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc4a399ec0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/3958 Modules linked in: CPU: 1 UID: 0 PID: 3958 Comm: syz-executor.4 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:ffff88804ef9f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880178d3700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff8880178d3afc RBP: ffff8880178d3700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880178d3700 R13: 0000000000000001 R14: ffffffff85c110c0 R15: ffff88804c091fb0 FS: 00005555644f2400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdff3fd8544 CR3: 000000004cea8000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 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: 0033:0x7fdff3f58427 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:00007ffc4a399df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdff3f58427 RDX: 00007ffc4a399ed3 RSI: 00007fdff3fb3022 RDI: 00007ffc4a399ec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc4a399c90 R10: 00007ffc4a399b47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc4a399ec0 irq event stamp: 321 hardirqs last enabled at (321): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (320): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (314): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (312): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci0: Opcode 0x0c03 failed: -4 Bluetooth: hci0: Opcode 0x0c03 failed: -4 audit: type=1400 audit(1768293320.810:10): avc: denied { tracepoint } for pid=4040 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 iso9660: Unknown parameter 'fsname' iso9660: Unknown parameter 'fsname' iso9660: Unknown parameter 'fsname' iso9660: Unknown parameter 'fsname' ref_ctr_offset mismatch. inode: 0x3e8c offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 iso9660: Unknown parameter 'fsname' ref_ctr_offset mismatch. inode: 0x3e98 offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 ref_ctr_offset mismatch. inode: 0x3e97 offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 ref_ctr_offset mismatch. inode: 0x3e82 offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 ref_ctr_offset mismatch. inode: 0x3e80 offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 audit: type=1400 audit(1768293323.449:11): avc: denied { write } for pid=4290 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 ref_ctr_offset mismatch. inode: 0x3e88 offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 ref_ctr_offset mismatch. inode: 0x3e9c offset: 0x0 ref_ctr_offset(old): 0x0 ref_ctr_offset(new): 0x4 loop2: detected capacity change from 0 to 6 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed loop2: detected capacity change from 0 to 6 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop2: detected capacity change from 0 to 6 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed audit: type=1400 audit(1768293325.213:12): avc: denied { read } for pid=4481 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop5: detected capacity change from 0 to 264192 EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 0 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 0 (only 16 groups) SELinux: Context system_u: is not valid (left unmapped). EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 0 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 0 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 0 (only 16 groups) loop7: detected capacity change from 0 to 2048 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000.