device veth15 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth15: link is not ready device veth13 entered promiscuous mode kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events linkwatch_event RIP: 0010:hsr_check_carrier_and_operstate+0x3f/0x810 net/hsr/hsr_device.c:116 Code: f9 be 04 00 00 00 48 89 ef e8 cd a8 ff ff 49 89 c6 48 83 c0 10 48 89 c2 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 64 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b RSP: 0018:ffff8880b5ad7ac8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888044462dc0 RCX: ffffffff87ea596e RDX: 0000000000000002 RSI: ffffffff87ea5977 RDI: 0000000000000004 RBP: ffff8880451fad40 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8b0bc900 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ef29000 CR3: 000000004f842000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hsr_netdev_notify+0x270/0x9f0 net/hsr/hsr_main.c:51 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 netdev_state_change net/core/dev.c:1349 [inline] netdev_state_change+0x100/0x130 net/core/dev.c:1342 linkwatch_do_dev+0xaa/0x110 net/core/link_watch.c:164 __linkwatch_run_queue+0x22d/0x5d0 net/core/link_watch.c:202 linkwatch_event+0x4a/0x60 net/core/link_watch.c:237 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 Modules linked in: ---[ end trace beb45bbfd2f5822c ]--- RIP: 0010:hsr_check_carrier_and_operstate+0x3f/0x810 net/hsr/hsr_device.c:116 Code: f9 be 04 00 00 00 48 89 ef e8 cd a8 ff ff 49 89 c6 48 83 c0 10 48 89 c2 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 64 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b RSP: 0018:ffff8880b5ad7ac8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888044462dc0 RCX: ffffffff87ea596e RDX: 0000000000000002 RSI: ffffffff87ea5977 RDI: 0000000000000004 RBP: ffff8880451fad40 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8b0bc900 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ef2e000 CR3: 00000000aa079000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: f9 stc 1: be 04 00 00 00 mov $0x4,%esi 6: 48 89 ef mov %rbp,%rdi 9: e8 cd a8 ff ff callq 0xffffa8db e: 49 89 c6 mov %rax,%r14 11: 48 83 c0 10 add $0x10,%rax 15: 48 89 c2 mov %rax,%rdx 18: 48 89 04 24 mov %rax,(%rsp) 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 64 07 00 00 jne 0x798 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 49 rex.WB 3f: 8b .byte 0x8b