Re: [syzbot] WARNING: refcount bug in qrtr_node_lookup
From: syzbot <hidden>
Date: 2021-09-03 11:04:19
Also in:
lkml
Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: UBSAN: object-size-mismatch in wg_xmit ================================================================================ UBSAN: object-size-mismatch in ./include/linux/skbuff.h:2048:28 member access within address 0000000096a277f4 with insufficient space for an object of type 'struct sk_buff' CPU: 0 PID: 3568 Comm: kworker/0:5 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x15e/0x1d3 lib/dump_stack.c:105 ubsan_epilogue lib/ubsan.c:151 [inline] handle_object_size_mismatch lib/ubsan.c:232 [inline] ubsan_type_mismatch_common+0x1de/0x390 lib/ubsan.c:245 __ubsan_handle_type_mismatch_v1+0x41/0x50 lib/ubsan.c:274 __skb_queue_before include/linux/skbuff.h:2048 [inline] __skb_queue_tail include/linux/skbuff.h:2081 [inline] wg_xmit+0x4da/0xa60 drivers/net/wireguard/device.c:182 __netdev_start_xmit include/linux/netdevice.h:4970 [inline] netdev_start_xmit+0x7b/0x140 include/linux/netdevice.h:4984 xmit_one net/core/dev.c:3576 [inline] dev_hard_start_xmit+0x182/0x2e0 net/core/dev.c:3592 __dev_queue_xmit+0x13b0/0x21a0 net/core/dev.c:4202 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0xc51/0x11b0 net/ipv6/ip6_output.c:126 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0x835/0xcf0 net/ipv6/ndisc.c:508 addrconf_dad_completed+0x6c5/0xa70 net/ipv6/addrconf.c:4203 addrconf_dad_work+0xba5/0x1510 net/ipv6/addrconf.c:3970 process_one_work+0x4b5/0x8d0 kernel/workqueue.c:2297 worker_thread+0x686/0x9e0 kernel/workqueue.c:2444 kthread+0x3ca/0x3f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ================================================================================ ================================================================================ UBSAN: object-size-mismatch in ./include/linux/skbuff.h:1941:2 member access within address 0000000096a277f4 with insufficient space for an object of type 'struct sk_buff' CPU: 0 PID: 3568 Comm: kworker/0:5 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x15e/0x1d3 lib/dump_stack.c:105 ubsan_epilogue lib/ubsan.c:151 [inline] handle_object_size_mismatch lib/ubsan.c:232 [inline] ubsan_type_mismatch_common+0x1de/0x390 lib/ubsan.c:245 __ubsan_handle_type_mismatch_v1+0x41/0x50 lib/ubsan.c:274 __skb_insert include/linux/skbuff.h:1941 [inline] __skb_queue_before include/linux/skbuff.h:2048 [inline] __skb_queue_tail include/linux/skbuff.h:2081 [inline] wg_xmit+0x53c/0xa60 drivers/net/wireguard/device.c:182 __netdev_start_xmit include/linux/netdevice.h:4970 [inline] netdev_start_xmit+0x7b/0x140 include/linux/netdevice.h:4984 xmit_one net/core/dev.c:3576 [inline] dev_hard_start_xmit+0x182/0x2e0 net/core/dev.c:3592 __dev_queue_xmit+0x13b0/0x21a0 net/core/dev.c:4202 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0xc51/0x11b0 net/ipv6/ip6_output.c:126 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0x835/0xcf0 net/ipv6/ndisc.c:508 addrconf_dad_completed+0x6c5/0xa70 net/ipv6/addrconf.c:4203 addrconf_dad_work+0xba5/0x1510 net/ipv6/addrconf.c:3970 process_one_work+0x4b5/0x8d0 kernel/workqueue.c:2297 worker_thread+0x686/0x9e0 kernel/workqueue.c:2444 kthread+0x3ca/0x3f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ================================================================================ IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready Tested on: commit: a9c9a6f7 Merge tag 'scsi-misc' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=134c5b6d300000 kernel config: https://syzkaller.appspot.com/x/.config?x=5f845e3d82a95a0e dashboard link: https://syzkaller.appspot.com/bug?extid=c613e88b3093ebf3686e compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 patch: https://syzkaller.appspot.com/x/patch.diff?x=14673df5300000