[Linux-kernel-mentees] [PATCH net v2 1/2] ipmr: Fix RCU list debugging warning

David Miller davem at davemloft.net
Fri May 15 01:01:25 UTC 2020


From: Amol Grover <frextrite at gmail.com>
Date: Thu, 14 May 2020 23:31:02 +0530

> ipmr_for_each_table() macro uses list_for_each_entry_rcu()
> for traversing outside of an RCU read side critical section
> but under the protection of rtnl_mutex. Hence, add the
> corresponding lockdep expression to silence the following
> false-positive warning at boot:
> 
> [    4.319347] =============================
> [    4.319349] WARNING: suspicious RCU usage
> [    4.319351] 5.5.4-stable #17 Tainted: G            E
> [    4.319352] -----------------------------
> [    4.319354] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!!
> 
> Fixes: f0ad0860d01e ("ipv4: ipmr: support multiple tables")
> Signed-off-by: Amol Grover <frextrite at gmail.com>

Applied.


More information about the Linux-kernel-mentees mailing list