1f0277483b
- block: bugfix: Don't pause vm when NOSPACE EIO happened - block: enable cache mode of empty cdrom - block/mirror: fix file-system went to read-only after block-mirror - scsi-bus: fix incorrect call for blk_error_retry_reset_timeout() - scsi-bus: fix unmatched object_unref() - block: Add sanity check when setting retry parameters - block-backend: Stop retrying when draining - scsi-disk: Add support for retry on errors - scsi-bus: Refactor the code that retries requests - virtio_blk: Add support for retry on errors - block: Add error retry param setting - block-backend: Add timeout support for retry - block-backend: Enable retry action on errors - block-backend: Add device specific retry callback - block-backend: Introduce retry timer - qapi/block-core: Add retry option for error action - scsi: bugfix: fix division by zero - scsi: cdrom: Fix crash after remote cdrom detached - qemu-pr: fixed ioctl failed for multipath disk - scsi-disk: define props in scsi_block_disk to avoid memleaks - bugfix: fix possible memory leak - bugfix: fix some illegal memory access and memory leak - util/log: add CONFIG_DISABLE_QEMU_LOG macro - log: Add some logs on VM runtime path - bugfix: fix eventfds may double free when vm_id reused in ivshmem - hw/display/macfb: Fix missing ERRP_GUARD() in macfb_nubus_realize() - hw/cxl/cxl-host: Fix missing ERRP_GUARD() in cxl_fixed_memory_window_config() - qemu-img create: 'cache' paramter only use for reg file image - qemu-img: add qemu-img direct create - qemu-img block: set zero flags only when discard_zeros of the block supported - Revert "file-posix: Remove unused s->discard_zeroes" - pcie_sriov: Validate NumVFs (CVE-2024-26327) - hw/nvme: Use pcie_sriov_num_vfs() (CVE-2024-26328) - hw/acpi/cpu: Use CPUState typedef - target/i386/sev: Fix missing ERRP_GUARD() for error_prepend() - virtio-gpu: remove needless condition - hw/i2c/smbus_slave: Add object path on error prints - vfio/pci: Ascend710 change to bar2 quirk - vfio/pci: Ascend910 need 4Bytes quirk in bar0 - vfio/pci: Ascend710 need 4Bytes quirk in bar0 - vfio/pci: Ascend310 need 4Bytes quirk in bar4 - chardev/char-socket: Fix TLS io channels sending too much data to the backend - i386/cpuid: Move leaf 7 to correct group - i386/cpuid: Decrease cpuid_i when skipping CPUID leaf 1F - i386/cpu: Mask with XCR0/XSS mask for FEAT_XSAVE_XCR0_HI and FEAT_XSAVE_XSS_HI leafs - i386/cpu: Clear FEAT_XSAVE_XSS_LO/HI leafs when CPUID_EXT_XSAVE is not available - blkio: Respect memory-alignment for bounce buffer allocations - virtio-gpu: Correct virgl_renderer_resource_get_info() error check - hw/usb: Style cleanup - tests/qemu-iotests: resolved the problem that the 108 test cases in the container fail Signed-off-by: Jiabo Feng <fengjiabo1@huawei.com> (cherry picked from commit 404d45bf9147058a475a8031c454a6c8e0acc123)
50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
From 6588c017de54bab8a11509d43e2ddabf065cfa50 Mon Sep 17 00:00:00 2001
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From: jiangdongxu <jiangdongxu1@huawei.com>
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Date: Thu, 10 Feb 2022 21:50:28 +0800
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Subject: [PATCH] bugfix: fix eventfds may double free when vm_id reused in
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ivshmem
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As the ivshmem Server-Client Protol describes, when a
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client disconnects from the server, server sends disconnect
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notifications to the other clients. And the other clients
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will free the eventfds of the disconnected client according
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to the client ID. If the client ID is reused, the eventfds
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may be double freed.
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It will be solved by setting eventfds to NULL after freeing
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and allocating memory for it when it's used.
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Signed-off-by: Peng Liang <liangpeng10@huawei.com>
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Signed-off-by: jiangdongxu <jiangdongxu1@huawei.com>
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Signed-off-by: Adttil <yangtao286@huawei.com>
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---
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hw/misc/ivshmem.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
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index 0447888029..ad9a3c546e 100644
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--- a/hw/misc/ivshmem.c
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+++ b/hw/misc/ivshmem.c
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@@ -400,6 +400,7 @@ static void close_peer_eventfds(IVShmemState *s, int posn)
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}
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g_free(s->peers[posn].eventfds);
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+ s->peers[posn].eventfds = NULL;
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s->peers[posn].nb_eventfds = 0;
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}
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@@ -533,6 +534,10 @@ static void process_msg_connect(IVShmemState *s, uint16_t posn, int fd,
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close(fd);
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return;
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}
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+ if (peer->eventfds == NULL) {
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+ peer->eventfds = g_new0(EventNotifier, s->vectors);
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+ peer->nb_eventfds = 0;
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+ }
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vector = peer->nb_eventfds++;
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IVSHMEM_DPRINTF("eventfds[%d][%d] = %d\n", posn, vector, fd);
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--
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2.27.0
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