Messages in this thread | | | Date | Fri, 23 Aug 2019 01:21:33 +0530 | From | Bharath Vedartham <> | Subject | net/dst_cache.c: preemption bug in net/dst_cache.c |
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Hi all,
I just want to bring attention to the syzbot bug [1]
Even though syzbot claims the bug to be in net/tipc, I feel it is in net/dst_cache.c. Please correct me if I am wrong.
This bug is being triggered a lot of times by syzbot since the day it was reported. Also given that this is core networking code, I felt it was important to bring this to attention.
It looks like preemption needs to be disabled before using this_cpu_ptr or maybe we would be better of using a get_cpu_var and put_cpu_var combo here.
[1] https://syzkaller.appspot.com/bug?id=dc6352b92862eb79373fe03fdf9af5928753e057
Thank you Bharath
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