CVS log for src/sys/netinet/ip_input.c

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Default branch: MAIN
Current tag: pgoyette-compat-base

Revision 1.376 / (download) - annotate - [select for diffs], Sat Feb 24 07:37:09 2018 UTC (4 months, 3 weeks ago) by ozaki-r
Branch: MAIN
CVS Tags: pgoyette-compat-base, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315
Branch point for: pgoyette-compat
Changes since 1.375: +4 -4 lines
Diff to previous 1.375 (colored)

Avoid a deadlock between softnet_lock and IFNET_LOCK

A deadlock occurs because there is a violation of the rule of lock ordering;
softnet_lock is held with hodling IFNET_LOCK, which violates the rule.
To avoid the deadlock, replace softnet_lock in in_control and in6_control
with KERNEL_LOCK.

We also need to add some KERNEL_LOCKs to protect the network stack surely.
This is required, for example, for PR kern/51356.

Fix PR kern/53043

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