Alexander Bulekov a2e1753b80 memory: prevent dma-reentracy issues ... Add a flag to the DeviceState, when a device is engaged in PIO/MMIO/DMA. This flag is set/checked prior to calling a device's MemoryRegion handlers, and set when device code initiates DMA. The purpose of this flag is to prevent two types of DMA-based reentrancy issues: 1.) mmio -> dma -> mmio case 2.) bh -> dma write -> mmio case These issues have led to problems such as stack-exhaustion and use-after-frees. Summary of the problem from Peter Maydell: https://lore.kernel.org/qemu-devel/CAFEAcA_23vc7hE3iaM-JVA6W38LK4hJoWae5KcknhPRD5fPBZA@mail.gmail.com Resolves: https://gitlab.com/qemu-project/qemu/-/issues/62 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/540 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/541 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/556 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/557 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/827 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1282 Resolves: CVE-2023-0330 Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20230427211013.2994127-2-alxndr@bu.edu> [thuth: Replace warn_report() with warn_report_once()] Signed-off-by: Thomas Huth <thuth@redhat.com>		2023-04-28 11:20:01 +02:00
..
authz
block	thread-pool: avoid passing the pool parameter every time	2023-04-25 13:17:28 +02:00
chardev
crypto	replace TABs with spaces	2023-03-20 12:43:50 +01:00
disas	replace TABs with spaces	2023-03-20 12:43:50 +01:00
exec	memory: prevent dma-reentracy issues	2023-04-28 11:20:01 +02:00
fpu
gdbstub	gdbstub: Remove gdb_do_syscallv	2023-03-07 20:44:09 +00:00
hw	memory: prevent dma-reentracy issues	2023-04-28 11:20:01 +02:00
io	io: mark mixed functions that can suspend	2023-04-20 11:17:35 +02:00
libdecnumber
migration	migration: move migration_global_dump() to migration-hmp-cmds.c	2023-04-24 15:01:46 +02:00
monitor	hmp: add cryptodev info command	2023-03-07 12:38:59 -05:00
net	net/eth: Introduce EthL4HdrProto	2023-03-10 15:35:38 +08:00
qapi	monitor: mark mixed functions that can suspend	2023-04-20 11:17:35 +02:00
qemu	util/mmap-alloc: qemu_fd_getfs()	2023-04-24 11:29:00 +02:00
qom
scsi
semihosting
standard-headers	linux-headers: Update to v6.2-rc8	2023-02-16 12:13:46 -07:00
sysemu	linux-aio: use LinuxAioState from the running thread	2023-04-25 13:17:28 +02:00
tcg	tcg: Replace tcg_abort with g_assert_not_reached	2023-04-23 08:17:46 +01:00
ui	ui: introduce egl_init()	2023-03-13 23:48:45 +04:00
user	*: Add missing includes of qemu/plugin.h	2023-03-22 15:06:57 +00:00
elf.h	replace TABs with spaces	2023-03-20 12:43:50 +01:00
glib-compat.h
qemu-io.h
qemu-main.h