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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues/target_missing/host_missing/accel_missing/1638.toml | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | emulator-bug-study-9260319e7411ff8281700a532caa436f40120ec4.tar.gz emulator-bug-study-9260319e7411ff8281700a532caa436f40120ec4.zip | |
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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/1638.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/1638.toml | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/1638.toml b/gitlab/issues/target_missing/host_missing/accel_missing/1638.toml deleted file mode 100644 index 54aa80a5..00000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/1638.toml +++ /dev/null @@ -1,27 +0,0 @@ -id = 1638 -title = "BUG: Segmentation fault when -object memory-backend-file use readonly=on, prealloc=on together" -state = "opened" -created_at = "2023-05-07T16:04:44.630Z" -closed_at = "n/a" -labels = [] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1638" -host-os = "Ubuntu 20.04 LTS" -host-arch = "x86_64" -qemu-version = "7" -guest-os = "Ubuntu20.04LTS" -guest-arch = "x86_64" -description = """Segmentation Fault while booting VM.""" -reproduce = """1. set qemu boot params to `-object memory-backend-file,id=mem1,readonly=on,prealloc=on,mem-path=<any-img-file>,size=4G` -2. -3.""" -additional = """It might not be a bug, probably a feature. -The reason of this segfault is: -readonly would mmap the backend file using PROT_READ, make it readonly, -but the prealloc=on would touch_pages the memory mmaped by the file. -SO the segfault happens. - -But there is no docs about this segfault condition (the readonly and prealloc cannot be used together.) - -And maybe there is a way to solve this problem, I think. -Use mmap the memory backend file to PROT_READ|PROT_WRITE at the beginnning, after touch_pages, then mprotect the memory. -change the prot to readonly if required.""" |