https://github.com/torvalds/linux
Revision 60bb83b81169820c691fbfa33a6a4aef32aa4b0b authored by Takashi Iwai on 13 April 2018, 22:35:13 UTC, committed by Linus Torvalds on 14 April 2018, 00:10:27 UTC
We've got a bug report indicating a kernel panic at booting on an x86-32 system, and it turned out to be the invalid PCI resource assigned after reallocation. __find_resource() first aligns the resource start address and resets the end address with start+size-1 accordingly, then checks whether it's contained. Here the end address may overflow the integer, although resource_contains() still returns true because the function validates only start and end address. So this ends up with returning an invalid resource (start > end). There was already an attempt to cover such a problem in the commit 47ea91b4052d ("Resource: fix wrong resource window calculation"), but this case is an overseen one. This patch adds the validity check of the newly calculated resource for avoiding the integer overflow problem. Bugzilla: http://bugzilla.opensuse.org/show_bug.cgi?id=1086739 Link: http://lkml.kernel.org/r/s5hpo37d5l8.wl-tiwai@suse.de Fixes: 23c570a67448 ("resource: ability to resize an allocated resource") Signed-off-by: Takashi Iwai <tiwai@suse.de> Reported-by: Michael Henders <hendersm@shaw.ca> Tested-by: Michael Henders <hendersm@shaw.ca> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Ram Pai <linuxram@us.ibm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 16e205c
Tip revision: 60bb83b81169820c691fbfa33a6a4aef32aa4b0b authored by Takashi Iwai on 13 April 2018, 22:35:13 UTC
resource: fix integer overflow at reallocation
resource: fix integer overflow at reallocation
Tip revision: 60bb83b
File | Mode | Size |
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ac97 | ||
aoa | ||
arm | ||
atmel | ||
core | ||
drivers | ||
firewire | ||
hda | ||
i2c | ||
isa | ||
mips | ||
oss | ||
parisc | ||
pci | ||
pcmcia | ||
ppc | ||
sh | ||
soc | ||
sparc | ||
spi | ||
synth | ||
usb | ||
x86 | ||
Kconfig | -rw-r--r-- | 2.7 KB |
Makefile | -rw-r--r-- | 549 bytes |
ac97_bus.c | -rw-r--r-- | 3.1 KB |
last.c | -rw-r--r-- | 1.2 KB |
sound_core.c | -rw-r--r-- | 14.5 KB |
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