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It is unclear why in6_pcblookup_local() would require write access

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to the PCB hash.  The function doesn't modify the hash. It always
asserted write lock historically, but with epoch conversion this
fails in some special cases.

Reviewed by:	rwatson, bz
Reported-by:	syzbot+0b0488ca537e20cb2429@syzkaller.appspotmail.com
This commit is contained in:
Gleb Smirnoff 2019-11-11 06:28:25 +00:00
parent f2cb29075f
commit c17cd08f53
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=354607
1 changed files with 1 additions and 1 deletions
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2
sys/netinet6/in6_pcb.c
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@ -714,7 +714,7 @@ in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
("%s: invalid lookup flags %d", __func__, lookupflags));
INP_HASH_WLOCK_ASSERT(pcbinfo);
INP_HASH_LOCK_ASSERT(pcbinfo);
if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
struct inpcbhead *head;