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Date: Tue, 10 Aug 2021 21:46:13 +0800 From: Tuo Li <islituo@...il.com> To: john.fastabend@...il.com, kpsingh@...nel.org Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org, baijiaju1990@...il.com Subject: [BUG] ipv6: possible null-pointer dereference in ip6_xmit() Hello, Our static analysis tool finds a possible null-pointer dereference in ip6_output.c in Linux 5.14.0-rc3: The variable n is checked in: 314: if (np) This indicates that it can be NULL. If so, a null-pointer dereference will occur in the called function ip6_autoflowlabel() at Line 320: 252: if (!np->autoflowlabel_set) I am not quite sure whether this possible null-pointer dereference is real and how to fix it if it is real. Any feedback would be appreciated, thanks! Reported-by: TOTE Robot <oslab@...nghua.edu.cn> Best wishes, Tuo Li
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