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Nickolai Zeldovich 0992b79577 net/xfrm/xfrm_replay: avoid division by zero 
All of the xfrm_replay->advance functions in xfrm_replay.c check if
x->replay_esn->replay_window is zero (and return if so).  However,
one of them, xfrm_replay_advance_bmp(), divides by that value (in the
'%' operator) before doing the check, which can potentially trigger
a divide-by-zero exception.  Some compilers will also assume that the
earlier division means the value cannot be zero later, and thus will
eliminate the subsequent zero check as dead code.

This patch moves the division to after the check.

Signed-off-by: Nickolai Zeldovich <nickolai@csail.mit.edu>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Change-Id: I0a8ed8f8a3ccc89e3081c5c94ac67a0c70670529
2020-11-30 19:39:08 +03:00
..
9p 9p: forgetting to cancel request on interrupted zero-copy RPC 2015-10-22 09:20:07 +08:00
802
8021q net: Replace u64_stats_fetch_begin_bh to u64_stats_fetch_begin_irq 2020-11-30 19:26:49 +03:00
appletalk appletalk: Fix socket referencing in skb 2014-07-28 07:06:45 -07:00
atm atm: deal with setting entry before mkip was called 2016-03-21 09:17:56 +08:00
ax25 net: add validation for the socket syscall protocol argument 2016-10-29 23:12:11 +08:00
batman-adv
bluetooth Bluetooth: cmtp: cmtp_add_connection() should verify that it's dealing with l2cap socket 2018-01-13 17:14:31 +03:00
bridge net: Explicitly initialize u64_stats_sync structures for lockdep 2020-11-30 19:26:40 +03:00
caif caif: remove wrong dev_net_set() call 2015-04-14 17:33:59 +08:00
can can: add missing initialisations in CAN related skbuffs 2015-06-19 11:40:23 +08:00
ceph crush: fix a bug in tree bucket decode 2015-10-22 09:20:07 +08:00
core tcp: TCP Small Queues 2020-11-30 19:35:00 +03:00
dcb dcbnl: fix various netlink info leaks 2013-03-20 13:05:02 -07:00
dccp Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
decnet net: Loopback ifindex is constant now 2018-08-27 14:52:48 +00:00
dns_resolver dns_resolver: Null-terminate the right string 2014-07-28 07:06:46 -07:00
dsa
econet
ethernet
ieee802154 6lowpan: Uncompression of traffic class field was incorrect 2013-12-08 07:29:41 -08:00
ipv4 tcp: gso: fix truesize tracking 2020-11-30 19:35:22 +03:00
ipv6 tcp: TCP Small Queues 2020-11-30 19:35:00 +03:00
ipx ipx: call ipxitf_put() in ioctl error path 2018-02-16 20:15:04 -07:00
irda Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
iucv net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:41 -08:00
key net: Fix RCU splat in af_key 2016-03-21 09:17:52 +08:00
l2tp Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
lapb
llc Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
mac80211 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
netfilter net: Replace u64_stats_fetch_begin_bh to u64_stats_fetch_begin_irq 2020-11-30 19:26:49 +03:00
netlabel netlabel: improve domain mapping validation 2013-06-27 11:27:31 -07:00
netlink Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
netrom net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:41 -08:00
nfc net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:41 -08:00
openvswitch net: Replace u64_stats_fetch_begin_bh to u64_stats_fetch_begin_irq 2020-11-30 19:26:49 +03:00
packet Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
phonet inet: prevent leakage of uninitialized memory to user in recv syscalls 2013-12-08 07:29:41 -08:00
rds RDS: fix race condition when sending a message on unbound socket 2016-03-21 09:17:54 +08:00
rfkill Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
rose NET: ROSE: Don't dereference NULL neighbour pointer. 2015-09-18 09:20:47 +08:00
rxrpc Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
sched Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
sctp Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
sunrpc vfs: make it possible to access the dentry hash/len as one 64-bit entry 2018-12-07 22:20:38 +04:00
tipc tipc: clear 'next'-pointer of message fragments before reassembly 2014-07-28 07:06:45 -07:00
unix pull mnt_want_write()/mnt_drop_write() into kern_path_create()/done_path_create() resp. 2018-12-07 22:28:48 +04:00
wanrouter
wimax
wireless cfg80211: Fix use after free when process wdev events 2020-10-25 02:37:54 -04:00
x25 net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:41 -08:00
xfrm net/xfrm/xfrm_replay: avoid division by zero 2020-11-30 19:39:08 +03:00
activity_stats.c
compat.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
Kconfig
Makefile
nonet.c
socket.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
sysctl_net.c