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* [BUG] ipv6: possible null-pointer dereference in ip6_xmit()
@ 2021-08-10 13:46 Tuo Li
  0 siblings, 0 replies; only message in thread
From: Tuo Li @ 2021-08-10 13:46 UTC (permalink / raw)
  To: john.fastabend, kpsingh; +Cc: netdev, linux-kernel, bpf, baijiaju1990


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 <>

Best wishes,
Tuo Li

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2021-08-10 13:46 [BUG] ipv6: possible null-pointer dereference in ip6_xmit() Tuo Li

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