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================================================================== BUG: KCSAN: data-race in ip6_mtu / rt6_disable_ip write to 0xffff88811517f300 of 8 bytes by task 3370 on cpu 0: rt6_uncached_list_flush_dev net/ipv6/route.c:184 [inline] rt6_disable_ip+0x349/0x5f0 net/ipv6/route.c:4914 addrconf_ifdown+0xa2/0xf20 net/ipv6/addrconf.c:3858 addrconf_notify+0x2ff/0x950 notifier_call_chain kernel/notifier.c:93 [inline] raw_notifier_call_chain+0x6f/0x1d0 kernel/notifier.c:461 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:1996 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] dev_close_many+0x174/0x240 net/core/dev.c:1589 unregister_netdevice_many_notify+0x263/0x11b0 net/core/dev.c:11373 unregister_netdevice_many+0x19/0x20 net/core/dev.c:11461 cleanup_net+0x411/0x810 net/core/net_namespace.c:621 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffff88811517f300 of 8 bytes by task 3339 on cpu 1: ip6_dst_mtu_maybe_forward include/net/ip6_route.h:340 [inline] ip6_mtu+0x53/0x120 net/ipv6/route.c:3219 dst_mtu include/net/dst.h:216 [inline] ip6_skb_dst_mtu include/net/ip6_route.h:280 [inline] __ip6_finish_output net/ipv6/ip6_output.c:207 [inline] ip6_finish_output+0x117/0x540 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0xf5/0x230 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] mld_sendpack+0x421/0x6d0 net/ipv6/mcast.c:1819 mld_send_cr net/ipv6/mcast.c:2120 [inline] mld_ifc_work+0x51a/0x7e0 net/ipv6/mcast.c:2651 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0xffff8881368a0000 -> 0xffff8881021c5000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3339 Comm: kworker/1:3 Tainted: G W 6.11.0-syzkaller-05319-g4a39ac5b7d62 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: mld mld_ifc_work ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/09/19 06:04 | upstream | 4a39ac5b7d62 | c673ca06 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in ip6_mtu / rt6_disable_ip |