================================================================== 8021q: adding VLAN 0 to HW filter on device batadv2 BUG: KASAN: user-memory-access in atomic_add include/asm-generic/atomic-instrumented.h:143 [inline] BUG: KASAN: user-memory-access in do_profile_hits.constprop.0+0x2ae/0x610 kernel/profile.c:324 Write of size 4 at addr 00000007fffc4414 by task syz-executor.2/8370 CPU: 1 PID: 8370 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: netlink: 'syz-executor.1': attribute type 5 has an invalid length. __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 kasan_report_error.cold+0x15b/0x1b9 mm/kasan/report.c:352 device dummy0 entered promiscuous mode kasan_report+0x8f/0xa0 mm/kasan/report.c:412 atomic_add include/asm-generic/atomic-instrumented.h:143 [inline] do_profile_hits.constprop.0+0x2ae/0x610 kernel/profile.c:324 profile_hits kernel/profile.c:398 [inline] profile_hit include/linux/profile.h:64 [inline] profile_tick+0xd7/0xf0 kernel/profile.c:408 device macvlan2 entered promiscuous mode tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 IPv6: ADDRCONF(NETDEV_UP): macvlan2: link is not ready RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d RSP: 0018:ffff88804d8b7890 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: ffff888093150340 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888093150bc4 RBP: ffff8880ba12b0c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba12b0c0 R13: ffff8880b4cde440 R14: 0000000000000000 R15: 0000000000000000 finish_lock_switch kernel/sched/core.c:2578 [inline] finish_task_switch+0x146/0x760 kernel/sched/core.c:2678 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x88f/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 freezable_schedule include/linux/freezer.h:172 [inline] futex_wait_queue_me+0x2fc/0x5e0 kernel/futex.c:2722 futex_wait+0x1ef/0x610 kernel/futex.c:2837 do_futex+0x268/0x1880 kernel/futex.c:3889 __do_sys_futex kernel/futex.c:3950 [inline] __se_sys_futex+0x28f/0x3b0 kernel/futex.c:3918 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f47f62bd049 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:00007ffc6f913538 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f47f63cff6c RCX: 00007f47f62bd049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f47f63cff6c RBP: 00007f47f63cff60 R08: 00000088ae6be76f R09: 0000000000000000 R10: 00007ffc6f913620 R11: 0000000000000246 R12: 0000000000081722 R13: 00007ffc6f913620 R14: 00007ffc6f913640 R15: 0000000000000032 ================================================================== ---------------- Code disassembly (best guess), 5 bytes skipped: 0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 7: fc ff df a: 48 c1 e8 03 shr $0x3,%rax e: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 12: 75 31 jne 0x45 14: 48 83 3d 01 31 d8 01 cmpq $0x0,0x1d83101(%rip) # 0x1d8311d 1b: 00 1c: 74 25 je 0x43 1e: fb sti 1f: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 25: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2a: e8 26 1b 28 f9 callq 0xf9281b55 2f: 65 8b 05 9f 8d e8 77 mov %gs:0x77e88d9f(%rip),%eax # 0x77e88dd5 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp