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Stefan Hajnoczi d7cd369402 migration: restrict scope of incoming fd read handler 
The incoming migration is processed in a coroutine and uses an fd read
handler to enter the yielded coroutine when data becomes available.

The read handler was set too broadly, so that spurious coroutine entries
were be triggered if other coroutine users yielded (like the block
layer's bdrv_write() function).

Install the fd read only only when yielding for more data to become
available.  This prevents spurious coroutine entries which break code
that assumes only a specific set of places can re-enter the coroutine.

This patch fixes crashes in block/raw-posix.c that are triggered with
"migrate -b" when qiov becomes a dangling pointer due to a spurious
coroutine entry that frees qiov early.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1360598505-5512-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-11 13:22:52 -06:00
audio audio: Replace non-portable asprintf in debug code by g_strdup_printf 2013-01-16 12:03:26 -06:00
backends Make all static TypeInfos const 2013-01-10 15:11:53 -06:00
block block/vpc: Fix size calculation 2013-02-11 08:14:41 -06:00
bsd-user linux-user: bsd-user: Don't reset X86CPU twice 2013-02-01 01:35:43 +01:00
default-configs Add TEWS TPCI200 IndustryPack emulation 2013-01-14 13:26:12 -06:00
disas build: remove universal-obj-y 2013-01-26 13:15:35 +00:00
docs trace: Fix location of simpletrace.py in docs 2013-02-05 21:52:55 +01:00
fpu softfloat: Handle float_muladd_negate_c when product is zero 2013-01-26 13:22:09 +00:00
fsdev virtfs-proxy-helper: Fix unchecked strdup() by conv. to g_strdup() 2013-01-30 11:14:46 +01:00
gdb-xml
hw error: Strip trailing '\n' from error string arguments (again) 2013-02-11 08:13:19 -06:00
include bswap: Fix width of swap in leul_to_cpu 2013-02-06 08:29:21 -06:00
ldscripts build: create ldscripts/ 2012-12-19 08:29:06 +01:00
libcacard libcacard: Fix unchecked strdup() by converting to g_strdup() 2013-01-30 11:14:46 +01:00
linux-headers Update Linux kernel headers 2013-01-18 19:06:57 +01:00
linux-user Merge branch 'for-linux-user' of https://git.gitorious.org/qemu-m68k/qemu-m68k into staging 2013-02-06 16:39:04 -06:00
net net: fix infinite loop on exit 2013-02-07 13:13:39 -06:00
pc-bios Update OpenBIOS images 2013-02-09 13:39:45 +00:00
pixman@97336fad32 qapi: move include files to include/qobject/ 2012-12-19 08:31:31 +01:00
qapi qapi: Fix unchecked strdup() by converting to g_strdup() 2013-01-30 11:14:46 +01:00
qga qemu-ga: Fix unchecked strdup() by converting to g_strdup() 2013-01-30 11:14:46 +01:00
QMP qmp: add pull_event function 2012-10-24 10:26:22 +02:00
qobject build: move qobject files to qobject/ and libqemuutil.a 2013-01-12 18:42:50 +01:00
qom qom: remove object_delete 2013-02-01 15:53:11 -06:00
roms Update OpenBIOS images 2013-02-09 13:39:45 +00:00
scripts Merge remote-tracking branch 'qemu-kvm/uq/master' into staging 2013-01-29 16:57:41 -06:00
slirp g_strdup(NULL) returns NULL; simplify 2013-01-30 11:14:46 +01:00
stubs stubs: fully replace qemu-tool.c and qemu-user.c 2013-01-12 17:19:08 +01:00
sysconfigs/target Eliminate cpus-x86_64.conf file 2012-09-21 15:12:58 +02:00
target-alpha target-alpha: Catch attempt to instantiate abstract type in cpu_init() 2013-01-27 23:33:34 +01:00
target-arm target-arm: Rename CPU types 2013-01-30 16:03:57 +00:00
target-cris target-cris: Build fix for debug output 2013-02-04 16:12:57 +01:00
target-i386 error: Strip trailing '\n' from error string arguments (again) 2013-02-11 08:13:19 -06:00
target-lm32 cpu: Move cpu_index field to CPUState 2013-01-15 04:09:13 +01:00
target-m68k target-m68k: Fix comment 2013-02-06 15:52:07 +01:00
target-microblaze target-microblaze: Mark as unmigratable 2013-02-01 01:35:21 +01:00
target-mips target-mips: enable access to DSP ASE if implemented 2013-01-31 23:42:03 +01:00
target-openrisc target-openrisc: Rename CPU subtypes 2013-02-01 01:35:43 +01:00
target-ppc error: Strip trailing '\n' from error string arguments (again) 2013-02-11 08:13:19 -06:00
target-s390x target-s390x: Fix wrong comparison in interrupt handling 2013-02-04 15:24:15 -06:00
target-sh4 target-sh4: Mark as unmigratable 2013-02-01 01:35:22 +01:00
target-sparc cpu: do not use object_delete 2013-02-01 15:53:11 -06:00
target-unicore32 target-unicore32: Rename CPU subtypes 2013-02-01 01:35:43 +01:00
target-xtensa target-xtensa: Mark as unmigratable 2013-02-01 01:35:21 +01:00
tcg tcg/target-arm: Add missing parens to assertions 2013-01-19 10:27:45 +00:00
tests libi2c-omap: Fix endianness dependency 2013-02-11 13:22:48 -06:00
trace trace: Clean up the "try to update atomic until it worked" loops 2013-02-05 21:52:55 +01:00
ui error: Strip trailing '\n' from error string arguments (again) 2013-02-11 08:13:19 -06:00
util qemu-option: Disable two helpful messages that got broken recently 2013-02-11 08:13:19 -06:00
.exrc qemu: add .exrc 2012-09-07 09:02:44 +03:00
.gitignore Add libcacard/trace/generated-tracers.c to .gitignore 2013-01-15 10:34:54 +01:00
.gitmodules pixman: add submodule 2012-11-01 13:10:06 +01:00
.mailmap Add a .mailmap to map pre-git-conversion authors to friendly names 2011-12-12 17:06:21 -06:00
aio-posix.c aio: Fix return value of aio_poll() 2013-01-17 10:51:42 +01:00
aio-win32.c aio: Fix return value of aio_poll() 2013-01-17 10:51:42 +01:00
arch_init.c Allow XBZRLE decoding without enabling the capability 2013-02-01 08:32:21 +01:00
async.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
balloon.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
block-migration.c block-migration: fix block_save_iterate() return value 2013-02-11 08:14:05 -06:00
block.c block: Fix is_allocated_above with resized files 2013-02-01 14:58:28 +01:00
blockdev-nbd.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
blockdev.c Merge remote-tracking branch 'kwolf/for-anthony' into staging 2013-01-28 14:46:45 -06:00
blockjob.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
bt-host.c softmmu: move remaining include files to include/ subdirectories 2012-12-19 08:32:46 +01:00
bt-vhci.c softmmu: move remaining include files to include/ subdirectories 2012-12-19 08:32:46 +01:00
Changelog fix some common typos 2012-05-14 07:27:24 +02:00
cmd.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
cmd.h
CODING_STYLE Replace Qemu by QEMU in internal documentation 2012-04-07 13:58:25 +00:00
configure configure: Fix build with XFree 2013-02-06 08:29:21 -06:00
COPYING
COPYING.LIB
coroutine-gthread.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
coroutine-sigaltstack.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
coroutine-ucontext.c gcc: rename CONFIG_PRAGMA_DISABLE_UNUSED_BUT_SET to CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE 2013-01-12 12:42:53 +00:00
coroutine-win32.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
cpu-exec.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
cpus.c kvm: Pass CPUState to kvm_on_sigbus_vcpu() 2013-01-28 16:57:56 +01:00
cputlb.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
device_tree.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
disas.c monitor: move include files to include/monitor/ 2012-12-19 08:31:32 +01:00
dma-helpers.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
dump-stub.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
dump.c exec: change RAM list to a TAILQ 2012-12-20 23:08:47 +01:00
exec.c Replace non-portable asprintf by g_strdup_printf 2013-01-19 10:24:43 +00:00
gdbstub.c cpu: Move cpu_index field to CPUState 2013-01-15 04:09:13 +01:00
HACKING HACKING: List areas where we may rely on impdef C behaviour 2012-12-08 14:27:40 +00:00
hmp-commands.hx hmp: Disable chardev-add and chardev-remove 2013-02-06 16:35:43 -06:00
hmp.c error: Strip trailing '\n' from error string arguments (again) 2013-02-11 08:13:19 -06:00
hmp.h qemu-char: Saner naming of memchar stuff & doc fixes 2013-02-06 16:35:19 -06:00
iohandler.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
ioport.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
kvm-all.c kvm: Pass CPUState to kvm_on_sigbus_vcpu() 2013-01-28 16:57:56 +01:00
kvm-stub.c kvm: Pass CPUState to kvm_on_sigbus_vcpu() 2013-01-28 16:57:56 +01:00
LICENSE LICENSE: There is no libqemu.a anymore 2011-12-09 11:25:22 +00:00
main-loop.c Check return values from g_poll and select 2013-01-09 11:03:05 -06:00
MAINTAINERS prep: Move PReP machine to hw/ppc/ 2013-01-30 10:42:29 +01:00
Makefile build: remove *.lo, *.a, *.la files from all subdirectories on make clean 2013-01-26 13:30:00 +00:00
Makefile.objs Move XBZRLE encoding code to a separate file to allow testing 2013-02-01 08:32:20 +01:00
Makefile.target build: remove universal-obj-y 2013-01-26 13:15:35 +00:00
memory.c bitops: unify bitops_ffsl with the one in host-utils.h, call it bitops_ctzl 2013-02-02 20:16:00 +00:00
memory_mapping-stub.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
memory_mapping.c exec: change RAM list to a TAILQ 2012-12-20 23:08:47 +01:00
migration-exec.c migration: make writes blocking 2012-12-20 23:09:25 +01:00
migration-fd.c migration: make writes blocking 2012-12-20 23:09:25 +01:00
migration-tcp.c migration: make writes blocking 2012-12-20 23:09:25 +01:00
migration-unix.c migration: make writes blocking 2012-12-20 23:09:25 +01:00
migration.c migration: restrict scope of incoming fd read handler 2013-02-11 13:22:52 -06:00
monitor.c HMP: add sub command table to info 2013-01-17 10:24:52 -02:00
nbd.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
os-posix.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
os-win32.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
page_cache.c migration: move include files to include/migration/ 2012-12-19 08:31:32 +01:00
qapi-schema-test.json qapi: add struct-errors test case to test-qmp-output-visitor 2012-03-27 09:11:00 -03:00
qapi-schema.json qemu-char: Saner naming of memchar stuff & doc fixes 2013-02-06 16:35:19 -06:00
qdict-test-data.txt
qemu-bridge-helper.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
qemu-char.c error: Strip trailing '\n' from error string arguments (again) 2013-02-11 08:13:19 -06:00
qemu-coroutine-io.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
qemu-coroutine-lock.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
qemu-coroutine-sleep.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
qemu-coroutine.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
qemu-doc.texi Documentation: Update image format information 2012-11-30 11:33:24 +01:00
qemu-img-cmds.hx qemu-img: document 'info --backing-chain' 2012-10-24 10:26:19 +02:00
qemu-img.c qemu-img: report size overflow error message 2013-01-02 16:08:56 +01:00
qemu-img.texi Documentation: Update image format information 2012-11-30 11:33:24 +01:00
qemu-io.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
qemu-log.c qemu-log: Plug trivial memory leak in cpu_set_log_filename() 2013-01-30 11:14:46 +01:00
qemu-nbd.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
qemu-nbd.texi qemu-nbd: document --cache and --aio options 2013-02-08 11:14:19 -06:00
qemu-options-wrapper.h vl.c: In qemu -h output, only print options for the arch we are running as 2011-12-19 10:27:33 -06:00
qemu-options.h vl.c: Move option generation logic into a wrapper file 2011-12-19 10:27:33 -06:00
qemu-options.hx qemu-char: Saner naming of memchar stuff & doc fixes 2013-02-06 16:35:19 -06:00
qemu-seccomp.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
qemu-tech.texi qemu-tech.texi: update implemented xtensa features list 2012-11-29 13:00:52 -06:00
qemu-timer.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
qemu.sasl
qmp-commands.hx qemu-char: Saner naming of memchar stuff & doc fixes 2013-02-06 16:35:19 -06:00
qmp.c softmmu: move remaining include files to include/ subdirectories 2012-12-19 08:32:46 +01:00
qtest.c qtest: Use strtoull() for uint64_t 2013-02-11 13:22:39 -06:00
readline.c readline: Fix unchecked strdup() by converting to g_strdup() 2013-01-30 11:14:46 +01:00
README Update README 2011-12-11 17:50:43 -06:00
rules.mak rules/mak: make clean should blow away timestamp files 2013-01-30 01:31:08 +02:00
savevm.c migration: restrict scope of incoming fd read handler 2013-02-11 13:22:52 -06:00
spice-qemu-char.c Merge remote-tracking branch 'bonzini/header-dirs' into staging 2012-12-19 17:15:39 -06:00
tcg-runtime.c
tci.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
thread-pool.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
thunk.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
TODO
trace-events s390: Add new channel I/O based virtio transport. 2013-01-29 21:50:04 +01:00
translate-all.c translate-all.c: Use tb1->phys_hash_next directly in tb_remove 2012-12-22 12:06:24 +00:00
translate-all.h exec: move TB handling to translate-all.c 2012-12-16 08:28:41 +00:00
user-exec.c Merge remote-tracking branch 'bonzini/header-dirs' into staging 2012-12-19 17:15:39 -06:00
VERSION Update version for release 2013-02-06 18:33:47 -06:00
version.rc
vl.c vl: Exit unsuccessfully on option argument syntax error 2013-02-11 08:13:19 -06:00
xbzrle.c Move XBZRLE encoding code to a separate file to allow testing 2013-02-01 08:32:20 +01:00
xen-all.c xen: Simplify halting of first CPU 2013-01-15 04:09:14 +01:00
xen-mapcache.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
xen-stub.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00

README 

Read the documentation in qemu-doc.html or on http://wiki.qemu.org

- QEMU team