===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.7/5850 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.7/5850: #0: ffff88800fbd03f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88805a002078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fbd4950 (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: 0 UID: 0 PID: 5850 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda560eac27 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:00007fda53660fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda560eac27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000080 RBP: 00007fda53661040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000cc0 R13: 0000000020000080 R14: 00007fda53661000 R15: 0000000020000e40 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/5850 Modules linked in: CPU: 0 UID: 0 PID: 5850 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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88800f659b80 RCX: ffffffff81893bc4 RDX: 0000000000000000 RSI: ffffffff81893bdb RDI: ffff88800f659f7c RBP: ffff88800f659b80 R08: ffffffff81893b1d R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000002a R12: ffff88800f659b80 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 00007fda53661700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda53660fe8 CR3: 0000000055988000 CR4: 0000000000350ef0 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 tick_nohz_handler+0x4ff/0x8c0 __hrtimer_run_queues+0x654/0xbb0 hrtimer_interrupt+0x369/0x830 __sysvec_apic_timer_interrupt+0xbb/0x300 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__sanitizer_cov_trace_cmp8+0x4/0x20 Code: 89 fe bf 04 00 00 00 e9 da fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 a8 fe ff ff 0f 1f RSP: 0018:ffff88801af77788 EFLAGS: 00000283 RAX: 0000000000000003 RBX: ffffffff86678270 RCX: ffffc90009035000 RDX: 0000000000000000 RSI: ffffffff8125332f RDI: ffffffff815d742f RBP: ffffffff8125332f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81253321 R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4cf/0x5b0 report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 exc_invalid_op+0x35/0x80 asm_exc_invalid_op+0x1a/0x20 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:ffff88801af779e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f659b80 RCX: ffffc90009035000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800f659f7c RBP: ffff88800f659b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f659b80 R13: 0000000000000001 R14: ffffffff85c0dfb0 R15: ffff88805971b2c0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda560eac27 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:00007fda53660fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda560eac27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000080 RBP: 00007fda53661040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000cc0 R13: 0000000020000080 R14: 00007fda53661000 R15: 0000000020000e40 irq event stamp: 133 hardirqs last enabled at (133): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (132): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (128): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (126): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs warning (device sda): ext4_group_extend:1870: need to use ext2online to resize further mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs warning (device sda): ext4_group_extend:1870: need to use ext2online to resize further EXT4-fs warning (device sda): ext4_group_extend:1870: need to use ext2online to resize further EXT4-fs warning (device sda): ext4_group_extend:1870: need to use ext2online to resize further EXT4-fs warning (device sda): ext4_group_extend:1870: need to use ext2online to resize further FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) perf: interrupt took too long (5206 > 5140), lowering kernel.perf_event_max_sample_rate to 38000 perf: interrupt took too long (6533 > 6507), lowering kernel.perf_event_max_sample_rate to 30000 perf: interrupt took too long (8196 > 8166), lowering kernel.perf_event_max_sample_rate to 24000 perf: interrupt took too long (10248 > 10245), lowering kernel.perf_event_max_sample_rate to 19000 perf: interrupt took too long (12815 > 12810), lowering kernel.perf_event_max_sample_rate to 15000 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy22: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy23: Selected rate control algorithm 'minstrel_ht' ---------------- Code disassembly (best guess): 0: 89 fe mov %edi,%esi 2: bf 04 00 00 00 mov $0x4,%edi 7: e9 da fe ff ff jmpq 0xfffffee6 c: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 13: 00 00 00 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: f3 0f 1e fa endbr64 * 2a: 48 8b 0c 24 mov (%rsp),%rcx <-- trapping instruction 2e: 48 89 f2 mov %rsi,%rdx 31: 48 89 fe mov %rdi,%rsi 34: bf 06 00 00 00 mov $0x6,%edi 39: e9 a8 fe ff ff jmpq 0xfffffee6 3e: 0f .byte 0xf 3f: 1f (bad)