netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.2:28513] Modules linked in: irq event stamp: 3496321 hardirqs last enabled at (3496320): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3496321): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (5319): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (5319): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 28513 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:pie_timer+0x645/0x740 net/sched/sch_pie.c:438 Code: ca 9a 3b 00 76 5f e8 9a 34 c8 fa 45 8d a7 a1 70 3d 0a be a1 70 3d 0a 31 ff 44 89 a3 a0 02 00 00 e8 f0 35 c8 fa e9 61 ff ff ff 76 34 c8 fa 48 c7 c0 80 d9 e0 89 48 ba 00 00 00 00 00 fc ff df RSP: 0018:ffff8880ba107cb8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000102 RBX: 0000000000000003 RCX: ffffffff869a4f9b RDX: 0000000000000003 RSI: ffff8880257e6000 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 00000000ffeced30 R13: 0000000000000000 R14: ffff88804daa1530 R15: 0000000000000000 FS: 00007fa5f8cf2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd8e292c90 CR3: 0000000048db5000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__orc_find+0x58/0xf0 arch/x86/kernel/unwind_orc.c:46 Code: 00 00 fc ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 <48> 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 RSP: 0018:ffff8880226af420 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff110044d5e96 RCX: ffffffff8122efe1 RDX: 0000000000000004 RSI: ffffffff8b8fd628 RDI: ffffffff8b325124 RBP: ffffffff8b325124 R08: 0000000000000000 R09: ffffffff8b8fd628 R10: ffff8880226af6af R11: 0000000000074071 R12: ffffffff8b325134 R13: ffffffff8b325124 R14: ffffffff8b325124 R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:159 [inline] unwind_next_frame+0x339/0x1400 arch/x86/kernel/unwind_orc.c:422 __unwind_start+0x5b8/0x960 arch/x86/kernel/unwind_orc.c:667 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x72/0x190 arch/x86/kernel/stacktrace.c:43 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x144/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] match_strdup+0x58/0xa0 lib/parser.c:331 parse_opts net/9p/client.c:193 [inline] p9_client_create+0x539/0x12e0 net/9p/client.c:1037 v9fs_session_init+0x1dd/0x1770 fs/9p/v9fs.c:421 v9fs_mount+0x73/0x910 fs/9p/vfs_super.c:135 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa5fa37d209 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa5f8cf2168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa5fa48ff60 RCX: 00007fa5fa37d209 RDX: 0000000020000b80 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007fa5fa3d7161 R08: 0000000020000500 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed271604f R14: 00007fa5f8cf2300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 38 Comm: kworker/u4:2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: netns cleanup_net RIP: 0010:__lock_release kernel/locking/lockdep.c:3684 [inline] RIP: 0010:lock_release+0x268/0x8b0 kernel/locking/lockdep.c:3927 Code: 4c 89 f7 e8 ba 72 ff ff 48 85 c0 0f 84 a9 03 00 00 48 8d 78 24 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 0f b6 0c 11 <48> 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 19 05 00 00 8b RSP: 0018:ffff8880b5147a90 EFLAGS: 00000803 RAX: ffff8880b5138bc0 RBX: ffffffff8d243760 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff89f85fa0 RDI: ffff8880b5138be4 RBP: ffffffff89f85fa0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11016a28f55 R13: ffffffff86d664b1 R14: ffff8880b51382c0 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2feee6b718 CR3: 0000000009e6d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] inet_twsk_purge+0x558/0x7c0 net/ipv4/inet_timewait_sock.c:298 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415