Alexey Dobriyan 0147fc058d tcp: restrict net.ipv4.tcp_adv_win_scale (#20312) ... tcp_win_from_space() does the following: if (sysctl_tcp_adv_win_scale <= 0) return space >> (-sysctl_tcp_adv_win_scale); else return space - (space >> sysctl_tcp_adv_win_scale); "space" is int. As per C99 6.5.7 (3) shifting int for 32 or more bits is undefined behaviour. Indeed, if sysctl_tcp_adv_win_scale is exactly 32, space >> 32 equals space and function returns 0. Which means we busyloop in tcp_fixup_rcvbuf(). Restrict net.ipv4.tcp_adv_win_scale to [-31, 31]. Fix https://bugzilla.kernel.org/show_bug.cgi?id=20312 Steps to reproduce: echo 32 >/proc/sys/net/ipv4/tcp_adv_win_scale wget www.kernel.org [softlockup] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2010-11-28 10:39:45 -08:00
..
ABI	oom: document obsolete oom_adj tunable	2010-11-12 07:55:31 -08:00
accounting	delay-accounting: reimplement -c for getdelays.c to report information on a target command	2010-10-27 18:03:17 -07:00
acpi
aoe
arm	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-10-24 13:41:39 -07:00
auxdisplay
blackfin
block	Documentation: remove anticipatory scheduler info	2010-11-11 12:09:59 +01:00
blockdev
cdrom
cgroups	cgroup: add clone_children control file	2010-10-27 18:03:09 -07:00
connector
console
cpu-freq
cpuidle
cris
crypto
development-process
device-mapper
DocBook	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb	2010-10-29 11:49:38 -07:00
driver-model
dvb
early-userspace
fault-injection
fb	Merge branch 'viafb-next' of git://github.com/schandinat/linux-2.6	2010-10-27 19:02:41 -07:00
filesystems	xfs: remove experimental tag from the delaylog option	2010-11-10 12:00:47 -06:00
firmware_class
frv
hwmon	hwmon: (it87) Add support for the IT8721F/IT8758E	2010-10-28 20:31:51 +02:00
i2c	i2c-i801: Add PCI idents for Patsburg 'IDF' SMBus controllers	2010-10-31 21:07:00 +01:00
i2o
ia64
ide
infiniband
input
ioctl	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6	2010-10-28 12:13:00 -07:00
isdn
ja_JP
kbuild	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	2010-10-28 16:18:59 -07:00
kdump
ko_KR
kvm	KVM: Document that KVM_GET_SUPPORTED_CPUID may return emulated values	2010-10-24 10:52:48 +02:00
laptops
leds	Documentation: led drivers lp5521 and lp5523	2010-11-12 07:55:32 -08:00
lguest
m68k
make
mips
misc-devices	Documentation: short descriptions for bh1770glc and apds990x drivers	2010-10-26 16:52:14 -07:00
mmc
mn10300
mtd
namespaces
netlabel
networking	tcp: restrict net.ipv4.tcp_adv_win_scale (#20312)	2010-11-28 10:39:45 -08:00
parisc
PCI
pcmcia
power
powerpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6	2010-10-22 20:30:48 -07:00
pps
prctl
RCU
s390
scheduler
scsi	[SCSI] megaraid_sas: Version and documentation update	2010-10-26 11:11:12 -05:00
serial
sh
sound	Merge branch 'topic/hda' into for-linus	2010-10-25 10:40:05 +02:00
sparc
spi
sysctl	Restrict unprivileged access to kernel syslog	2010-11-12 07:55:32 -08:00
telephony
thermal
timers	Documentation/timers/hpet_example.c: add supporting info for hpet_example	2010-10-26 16:52:11 -07:00
trace	tracing, vmscan: add trace events for LRU list shrinking	2010-10-26 16:52:07 -07:00
uml
usb
video4linux
vm	mm: highmem documentation	2010-10-26 16:52:08 -07:00
w1
watchdog
wimax
x86
zh_CN
.gitignore
00-INDEX
apparmor.txt
applying-patches.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
Changes
circular-buffers.txt
coccinelle.txt	Coccinelle: Fix documentation	2010-10-28 00:32:23 +02:00
CodingStyle
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
credentials.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6	2010-10-28 09:35:11 -07:00
DMA-API-HOWTO.txt
DMA-API.txt
DMA-attributes.txt
DMA-ISA-LPC.txt
dmaengine.txt
dontdiff
dynamic-debug-howto.txt
edac.txt
eisa.txt
email-clients.txt
feature-removal-schedule.txt	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6	2010-10-28 09:35:11 -07:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gpio.txt
highuid.txt
HOWTO
hw_random.txt
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt	Documentation: remove anticipatory scheduler info	2010-11-11 12:09:59 +01:00
keys-request-key.txt
keys.txt
kmemcheck.txt
kmemleak.txt
kobject.txt
kprobes.txt
kref.txt
ldm.txt
leds-class.txt	led-class: always implement blinking	2010-11-12 07:55:32 -08:00
leds-lp3944.txt
local_ops.txt
lockdep-design.txt
lockstat.txt
logo.gif
logo.txt
magic-number.txt
Makefile
ManagementStyle
mca.txt
md.txt
memory-barriers.txt
memory-hotplug.txt
memory.txt
mono.txt
mutex-design.txt
nmi_watchdog.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
pi-futex.txt
pnp.txt
preempt-locking.txt
printk-formats.txt
prio_tree.txt
rbtree.txt	Documentation: remove anticipatory scheduler info	2010-11-11 12:09:59 +01:00
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rt-mutex-design.txt
rt-mutex.txt
rtc.txt
SAK.txt
SecurityBugs
SELinux.txt
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
SM501.txt
Smack.txt
sparse.txt
spinlocks.txt
stable_api_nonsense.txt
stable_kernel_rules.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches
svga.txt
sysfs-rules.txt
sysrq.txt	documentation: update sysrq.txt magic sysrq keys	2010-10-26 17:32:41 -07:00
tomoyo.txt
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
volatile-considered-harmful.txt
workqueue.txt
zorro.txt