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[PATCH 34/55] block/backup: fix backup_cow_with_offload for last cluster
From: |
Michael Roth |
Subject: |
[PATCH 34/55] block/backup: fix backup_cow_with_offload for last cluster |
Date: |
Tue, 5 Nov 2019 14:52:22 -0600 |
From: Vladimir Sementsov-Ogievskiy <address@hidden>
We shouldn't try to copy bytes beyond EOF. Fix it.
Fixes: 9ded4a0114968e
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Reviewed-by: John Snow <address@hidden>
Message-id: address@hidden
Signed-off-by: Max Reitz <address@hidden>
(cherry picked from commit 1048ddf0a32dcdaa952e581bd503d49adad527cc)
Signed-off-by: Michael Roth <address@hidden>
---
block/backup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/backup.c b/block/backup.c
index 7067d1d1ad..8761f1f9a7 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -167,7 +167,7 @@ static int coroutine_fn
backup_cow_with_offload(BackupBlockJob *job,
assert(QEMU_IS_ALIGNED(job->copy_range_size, job->cluster_size));
assert(QEMU_IS_ALIGNED(start, job->cluster_size));
- nbytes = MIN(job->copy_range_size, end - start);
+ nbytes = MIN(job->copy_range_size, MIN(end, job->len) - start);
nr_clusters = DIV_ROUND_UP(nbytes, job->cluster_size);
hbitmap_reset(job->copy_bitmap, start, job->cluster_size * nr_clusters);
ret = blk_co_copy_range(blk, start, job->target, start, nbytes,
--
2.17.1
- [PATCH 36/55] make-release: pull in edk2 submodules so we can build it from tarballs, (continued)
- [PATCH 36/55] make-release: pull in edk2 submodules so we can build it from tarballs, Michael Roth, 2019/11/05
- [PATCH 27/55] curl: Report only ready sockets, Michael Roth, 2019/11/05
- [PATCH 30/55] block/qcow2: Fix corruption introduced by commit 8ac0f15f335, Michael Roth, 2019/11/05
- [PATCH 29/55] blockjob: update nodes head while removing all bdrv, Michael Roth, 2019/11/05
- [PATCH 02/55] Revert "ide/ahci: Check for -ECANCELED in aio callbacks", Michael Roth, 2019/11/05
- [PATCH 22/55] block/nfs: tear down aio before nfs_close, Michael Roth, 2019/11/05
- [PATCH 31/55] coroutine: Add qemu_co_mutex_assert_locked(), Michael Roth, 2019/11/05
- [PATCH 33/55] block/backup: fix max_transfer handling for copy_range, Michael Roth, 2019/11/05
- [PATCH 38/55] s390: PCI: fix IOMMU region init, Michael Roth, 2019/11/05
- [PATCH 35/55] hw/arm/boot.c: Set NSACR.{CP11, CP10} for NS kernel boots, Michael Roth, 2019/11/05
- [PATCH 34/55] block/backup: fix backup_cow_with_offload for last cluster,
Michael Roth <=
- [PATCH 39/55] block/snapshot: Restrict set of snapshot nodes, Michael Roth, 2019/11/05
- [PATCH 03/55] s390x/tcg: Fix VERIM with 32/64 bit elements, Michael Roth, 2019/11/05
- [PATCH 43/55] qcow2: Limit total allocation range to INT_MAX, Michael Roth, 2019/11/05
- [PATCH 44/55] iotests: Test large write request to qcow2 file, Michael Roth, 2019/11/05
- [PATCH 47/55] virtio: new post_load hook, Michael Roth, 2019/11/05
- [PATCH 07/55] xen-bus: check whether the frontend is active during device reset..., Michael Roth, 2019/11/05
- [PATCH 48/55] virtio-net: prevent offloads reset on migration, Michael Roth, 2019/11/05
- [PATCH 42/55] hw/core/loader: Fix possible crash in rom_copy(), Michael Roth, 2019/11/05
- [PATCH 45/55] mirror: Do not dereference invalid pointers, Michael Roth, 2019/11/05
- [PATCH 52/55] target/arm: Allow reading flags from FPSCR for M-profile, Michael Roth, 2019/11/05