================================================================================ UBSAN: Undefined behaviour in net/bridge/br_private.h:586:29 load of value 3 is not a valid value for type '_Bool' CPU: 1 PID: 8203 Comm: syz-executor.4 Not tainted 4.19.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 device bridge_slave_1 left promiscuous mode __ubsan_handle_load_invalid_value.cold+0x63/0x6f lib/ubsan.c:454 br_skb_isolated net/bridge/br_private.h:586 [inline] should_deliver net/bridge/br_forward.c:34 [inline] maybe_deliver.cold+0x15/0x34 net/bridge/br_forward.c:178 br_flood+0x180/0x4f0 net/bridge/br_forward.c:226 br_dev_xmit+0xdd0/0x1510 net/bridge/br_device.c:103 __netdev_start_xmit include/linux/netdevice.h:4333 [inline] netdev_start_xmit include/linux/netdevice.h:4347 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x960 net/core/dev.c:3272 bridge0: port 2(bridge_slave_1) entered disabled state __dev_queue_xmit+0x276a/0x2ec0 net/core/dev.c:3838 mrp_queue_xmit net/802/mrp.c:354 [inline] mrp_join_timer+0x8a/0xc0 net/802/mrp.c:598 call_timer_fn+0x177/0x760 kernel/time/timer.c:1338 expire_timers+0x243/0x500 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1703 [inline] run_timer_softirq+0x259/0x730 kernel/time/timer.c:1716 __do_softirq+0x27d/0xad2 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x22d/0x270 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x15f/0x5d0 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0033:0x412f72 Code: 48 8d 6f fc 44 39 c1 49 89 ee 77 28 48 83 e8 04 39 ca 76 0e 0f 1f 40 00 48 83 e8 04 8b 10 39 ca 77 f6 48 39 e8 76 16 89 57 fc <44> 89 00 8b 50 fc 41 8b 0c 24 44 8b 07 48 83 c7 04 eb c3 4c 89 ea RSP: 002b:00007ffc932489b0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 00007f65d743ee68 RBX: 00007f65d743ede0 RCX: 0000000081773d9c RDX: 0000000081773d9c RSI: 00007f65d743ee98 RDI: 00007f65d743ee0c RBP: 00007f65d743ee08 R08: 0000000081773d9c R09: 0000000000000000 R10: 00007ffc93248c70 R11: 0000000000000246 R12: 00007f65d743edd8 R13: 0000000000000015 R14: 00007f65d743ee08 R15: 0000000000035a02 ================================================================================ device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state XFS (loop0): Invalid superblock magic number netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. XFS (loop0): Invalid superblock magic number netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. XFS (loop0): Invalid superblock magic number Bluetooth: hci5: command 0x0405 tx timeout nla_parse: 8 callbacks suppressed netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 176 bytes leftover after parsing attributes in process `syz-executor.4'. bridge1: port 1(syz_tun) entered blocking state bridge1: port 1(syz_tun) entered disabled state device syz_tun entered promiscuous mode bridge1: port 1(syz_tun) entered blocking state bridge1: port 1(syz_tun) entered forwarding state netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. device syz_tun left promiscuous mode bridge1: port 1(syz_tun) entered disabled state bridge2: port 1(syz_tun) entered blocking state bridge2: port 1(syz_tun) entered disabled state device syz_tun entered promiscuous mode netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. bridge2: port 1(syz_tun) entered blocking state bridge2: port 1(syz_tun) entered forwarding state bridge2: received packet on syz_tun with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0) netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 176 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. device syz_tun left promiscuous mode bridge2: port 1(syz_tun) entered disabled state bridge3: port 1(syz_tun) entered blocking state bridge3: port 1(syz_tun) entered disabled state device syz_tun entered promiscuous mode netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. bridge3: port 1(syz_tun) entered blocking state bridge3: port 1(syz_tun) entered forwarding state