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4837a1a516
qemu/hw
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Jan Beulich 4837a1a516 xen/blkif: avoid double access to any shared ring request fields 
Commit f9e98e5d7a ("xen/blkif: Avoid double access to
src->nr_segments") didn't go far enough: src->operation is also being
used twice. And nothing was done to prevent the compiler from using the
source side of the copy done by blk_get_request() (granted that's very
unlikely).

Move the barrier()s up, and add another one to blk_get_request().

Note that for completing XSA-155, the barrier() getting added to
blk_get_request() would suffice, and hence the changes to xen_blkif.h
are more like just cleanup. And since, as said, the unpatched code
getting compiled to something vulnerable is very unlikely (and not
observed in practice), this isn't being viewed as a new security issue.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
2016-06-13 14:32:28 +01:00
..
9pfs all: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
acpi acpi: make bios_linker_loader_add_checksum() API offset based 2016-06-07 15:39:27 +03:00
alpha alpha: include cpu-qom.h in files that require AlphaCPU 2016-05-19 16:42:27 +02:00
arm hw/arm: virt uart fix 2016-06-08 19:41:44 +01:00
audio audio: Use DIV_ROUND_UP 2016-06-07 18:19:25 +03:00
block xen/blkif: avoid double access to any shared ring request fields 2016-06-13 14:32:28 +01:00
bt bt: rewrite csrhci_write to avoid out-of-bounds writes 2016-05-29 09:11:11 +02:00
char hw/char: QOM'ify escc.c (fix) 2016-06-06 18:57:06 +02:00
core qdev: Clean up around properties 2016-06-07 18:19:23 +03:00
cpu explicitly include qom/cpu.h 2016-05-19 16:42:27 +02:00
cris hw/char: QOM'ify etraxfs_ser.c 2016-05-29 09:11:10 +02:00
display xen: Use DIV_ROUND_UP 2016-06-07 18:19:24 +03:00
dma hw: explicitly include qemu/log.h 2016-05-19 16:42:29 +02:00
gpio hw: clean up hw/hw.h includes 2016-05-19 16:42:30 +02:00
i2c i2c: add aspeed i2c controller 2016-06-06 16:59:29 +01:00
i386 cpu-exec: Rename cpu_resume_from_signal() to cpu_loop_exit_noexc() 2016-06-09 15:55:02 +01:00
ide macio: use DMA memory interface for non-block ATAPI transfers 2016-06-07 10:17:45 +10:00
input hw: explicitly include qemu/log.h 2016-05-19 16:42:29 +02:00
intc hw: Clean up includes 2016-06-07 18:19:23 +03:00
ipack ipack: Update e-mail address 2016-05-18 15:04:27 +03:00
ipmi hw/ipmi: fix spelling 2016-06-07 18:02:48 +03:00
isa ICH9: fix typo 2016-06-07 18:19:23 +03:00
lm32 hw/char: QOM'ify milkymist-uart.c 2016-05-29 09:11:10 +02:00
m68k hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
mem pc-dimm: introduce realize callback 2016-06-07 15:39:28 +03:00
microblaze hw/char: QOM'ify xilinx_uartlite model 2016-06-06 16:59:32 +01:00
mips mips: use MIPSCPU instead of CPUMIPSState 2016-05-19 16:42:27 +02:00
misc dbdma: use DMA memory interface for memory accesses 2016-06-07 10:17:45 +10:00
moxie hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
net rocker: Use DIV_ROUND_UP 2016-06-07 18:19:25 +03:00
nvram fw_cfg: follow CODING_STYLE 2016-06-07 18:19:23 +03:00
openrisc hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
pci pcie: Introduce function for DSN capability creation 2016-06-02 10:42:26 +08:00
pci-bridge hw/pci-bridge: Add missing unref in case register-bus fails 2016-04-07 19:57:33 +03:00
pci-host hw: explicitly include qemu/log.h 2016-05-19 16:42:29 +02:00
pcmcia hw: Clean up includes 2016-01-29 15:07:25 +00:00
ppc ppc: Remove a potential overflow in muldiv64() 2016-06-07 18:02:49 +03:00
s390x s390x/virtio-ccw: fix spelling 2016-06-07 18:02:48 +03:00
scsi * max-ram-below-4g improvement (Gerd) 2016-06-08 14:45:28 +01:00
sd hw: explicitly include qemu/log.h 2016-05-19 16:42:29 +02:00
sh4 cpu: move exec-all.h inclusion out of cpu.h 2016-05-19 16:42:29 +02:00
smbios include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
sparc vl: Replace DT_NOGRAPHIC with machine option 2016-05-20 14:28:54 -03:00
sparc64 util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
ssi hw: explicitly include qemu/log.h 2016-05-19 16:42:29 +02:00
timer hw: Clean up includes 2016-06-07 18:19:23 +03:00
tpm tpm: Fix write to file descriptor function 2016-04-13 19:52:34 +03:00
tricore hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
unicore32 hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
usb usb: Use DIV_ROUND_UP 2016-06-07 18:19:25 +03:00
vfio vfio: Check that IOMMU MR translates to system address space 2016-05-26 11:12:09 -06:00
virtio -----BEGIN PGP SIGNATURE----- 2016-06-07 15:59:28 +01:00
watchdog nmi: remove x86 specific nmi handling 2016-05-23 16:53:46 +02:00
xen xen: write information about supported backends 2016-05-23 13:30:03 +02:00
xenpv xen: add pvUSB backend 2016-05-23 13:30:03 +02:00
xtensa replace muldiv64(a, b, c) by (uint64_t)a * b / c 2016-06-07 18:02:49 +03:00
Makefile.objs Add a base IPMI interface 2015-12-22 18:39:19 +02:00