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authorChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
commit3e4c5a6261770bced301b5e74233e7866166ea5b (patch)
tree9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/2853
parente5634e2806195bee44407853c4bf8776f7abfa4f (diff)
downloadqemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz
qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip
clean up repository
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/2853')
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diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/2853 b/gitlab/issues_text/target_missing/host_missing/accel_missing/2853
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-double-free in vmdk_add_extent()
-Description of problem:
-A double-free issue in the VMDK driver occurs when handling snapshots.
-The memory allocated for extent structures is freed twice: first in
-vmdk_close (block/vmdk.c) and then in vmdk_add_extent (block/vmdk.c).
-Steps to reproduce:
-1. [test.raw](/uploads/deeb9dc3cab1916adadd211173cd175a/test.raw)
-2. ./qemu-img snapshot -q -a test test.raw
-Additional information:
-<details>
-<pre>
-./qemu-img snapshot -q -a test  test.raw
-==18180==WARNING: ASan doesn't fully support makecontext/swapcontext functions and may produce false positives in some cases!
-=================================================================
-==18180==ERROR: AddressSanitizer: attempting double-free on 0x612000011bc0 in thread T0:
-    #0 0x5605ba505168 in realloc /usr/src/RPM/BUILD/llvm-11.0.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:164:3
-    #1 0x7f22be5fd6b7 in g_realloc (/lib64/libglib-2.0.so.0+0x5c6b7)
-    #2 0x5605ba866a79 in vmdk_add_extent /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:570:18
-    #3 0x5605ba86122e in vmdk_open_vmdk4 /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:1059:11
-    #4 0x5605ba86122e in vmdk_open_sparse /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:1127:20
-    #5 0x5605ba85723a in vmdk_open /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:1371:19
-    #6 0x5605ba803ca4 in bdrv_snapshot_goto /home/gerben/qemu-img_fuzz/build/../block/snapshot.c:299:20
-    #7 0x5605baa8cdd2 in img_snapshot /home/gerben/qemu-img_fuzz/build/../qemu-img.c:3500:15
-    #8 0x7f22bd559efc in __libc_start_main (/lib64/libc.so.6+0x27efc)
-    #9 0x5605ba4619f9 in _start /usr/src/RPM/BUILD/glibc-2.32-alt5.p10.3/csu/../sysdeps/x86_64/start.S:120
-
-0x612000011bc0 is located 0 bytes inside of 272-byte region [0x612000011bc0,0x612000011cd0)
-freed by thread T0 here:
-    #0 0x5605ba504aef in free /usr/src/RPM/BUILD/llvm-11.0.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:123:3
-    #1 0x5605ba857e6d in vmdk_close /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:2889:5
-    #2 0x5605ba803bb2 in bdrv_snapshot_goto /home/gerben/qemu-img_fuzz/build/../block/snapshot.c:290:13
-    #3 0x5605baa8cdd2 in img_snapshot /home/gerben/qemu-img_fuzz/build/../qemu-img.c:3500:15
-    #4 0x7f22bd559efc in __libc_start_main (/lib64/libc.so.6+0x27efc)
-
-previously allocated by thread T0 here:
-    #0 0x5605ba505168 in realloc /usr/src/RPM/BUILD/llvm-11.0.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:164:3
-    #1 0x7f22be5fd6b7 in g_realloc (/lib64/libglib-2.0.so.0+0x5c6b7)
-    #2 0x5605ba86122e in vmdk_open_vmdk4 /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:1059:11
-    #3 0x5605ba86122e in vmdk_open_sparse /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:1127:20
-    #4 0x5605ba85723a in vmdk_open /home/gerben/qemu-img_fuzz/build/../block/vmdk.c:1371:19
-    #5 0x5605ba56e3a2 in bdrv_open_driver /home/gerben/qemu-img_fuzz/build/../block.c:1660:15
-    #6 0x5605ba57ea50 in bdrv_open_common /home/gerben/qemu-img_fuzz/build/../block.c:1985:11
-    #7 0x5605ba57ea50 in bdrv_open_inherit /home/gerben/qemu-img_fuzz/build/../block.c:4153:11
-    #8 0x5605ba585cb8 in bdrv_open /home/gerben/qemu-img_fuzz/build/../block.c:4248:12
-    #9 0x5605ba637d4c in blk_new_open /home/gerben/qemu-img_fuzz/build/../block/block-backend.c:457:10
-    #10 0x5605baa9193b in img_open_file /home/gerben/qemu-img_fuzz/build/../qemu-img.c:405:11
-    #11 0x5605baa9143e in img_open /home/gerben/qemu-img_fuzz/build/../qemu-img.c:450:15
-    #12 0x5605baa8cc71 in img_snapshot /home/gerben/qemu-img_fuzz/build/../qemu-img.c:3468:11
-    #13 0x7f22bd559efc in __libc_start_main (/lib64/libc.so.6+0x27efc)
-
-SUMMARY: AddressSanitizer: double-free /usr/src/RPM/BUILD/llvm-11.0.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:164:3 in realloc
-==18180==ABORTING
-</pre>
-</details>