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Revision 9aea5a65aa7a1af9a4236dfaeb0088f1624f9919 authored by Roland McGrath on 08 September 2010, 02:37:06 UTC, committed by Linus Torvalds on 10 September 2010, 15:10:26 UTC 
execve: make responsive to SIGKILL with large arguments
 
An execve with a very large total of argument/environment strings
can take a really long time in the execve system call.  It runs
uninterruptibly to count and copy all the strings.  This change
makes it abort the exec quickly if sent a SIGKILL.

Note that this is the conservative change, to interrupt only for
SIGKILL, by using fatal_signal_pending().  It would be perfectly
correct semantics to let any signal interrupt the string-copying in
execve, i.e. use signal_pending() instead of fatal_signal_pending().
We'll save that change for later, since it could have user-visible
consequences, such as having a timer set too quickly make it so that
an execve can never complete, though it always happened to work before.

Signed-off-by: Roland McGrath <roland@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 7993bc1
Raw File
Kconfig 
menu "Device Drivers"

source "drivers/base/Kconfig"

source "drivers/connector/Kconfig"

source "drivers/mtd/Kconfig"

source "drivers/of/Kconfig"

source "drivers/parport/Kconfig"

source "drivers/pnp/Kconfig"

source "drivers/block/Kconfig"

# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4

source "drivers/misc/Kconfig"

source "drivers/ide/Kconfig"

source "drivers/scsi/Kconfig"

source "drivers/ata/Kconfig"

source "drivers/md/Kconfig"

source "drivers/message/fusion/Kconfig"

source "drivers/firewire/Kconfig"

source "drivers/message/i2o/Kconfig"

source "drivers/macintosh/Kconfig"

source "drivers/net/Kconfig"

source "drivers/isdn/Kconfig"

source "drivers/telephony/Kconfig"

# input before char - char/joystick depends on it. As does USB.

source "drivers/input/Kconfig"

source "drivers/char/Kconfig"

source "drivers/i2c/Kconfig"

source "drivers/spi/Kconfig"

source "drivers/pps/Kconfig"

source "drivers/gpio/Kconfig"

source "drivers/w1/Kconfig"

source "drivers/power/Kconfig"

source "drivers/hwmon/Kconfig"

source "drivers/thermal/Kconfig"

source "drivers/watchdog/Kconfig"

source "drivers/ssb/Kconfig"

source "drivers/mfd/Kconfig"

source "drivers/regulator/Kconfig"

source "drivers/media/Kconfig"

source "drivers/video/Kconfig"

source "sound/Kconfig"

source "drivers/hid/Kconfig"

source "drivers/usb/Kconfig"

source "drivers/uwb/Kconfig"

source "drivers/mmc/Kconfig"

source "drivers/memstick/Kconfig"

source "drivers/leds/Kconfig"

source "drivers/accessibility/Kconfig"

source "drivers/infiniband/Kconfig"

source "drivers/edac/Kconfig"

source "drivers/rtc/Kconfig"

source "drivers/dma/Kconfig"

source "drivers/dca/Kconfig"

source "drivers/auxdisplay/Kconfig"

source "drivers/uio/Kconfig"

source "drivers/vlynq/Kconfig"

source "drivers/xen/Kconfig"

source "drivers/staging/Kconfig"

source "drivers/platform/Kconfig"
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