ace8e9a5c4
- fix statfs in linux-user - disable FIEMAP support in linux-user OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=102
49 lines
2.2 KiB
Diff
49 lines
2.2 KiB
Diff
From 496ac41ba22b2dcda7eb0a90690dc55ae86c7c50 Mon Sep 17 00:00:00 2001
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From: Alexander Graf <agraf@suse.de>
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Date: Tue, 21 Aug 2012 11:16:06 +0200
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Subject: [PATCH] linux-user: fix statfs
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The statfs syscall should always memset(0) its full struct extent before
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writing to it. Newer versions of the syscall use one of the reserved fields
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for flags, which would otherwise get stale values from uncleaned memory.
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This fixes libarchive for me, which got confused about the return value of
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pathconf("/", _PC_REC_XFER_ALIGN) otherwise, as it some times gave old pointers
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as return value.
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Signed-off-by: Alexander Graf <agraf@suse.de>
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---
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linux-user/syscall.c | 12 ++++++++++++
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1 files changed, 12 insertions(+), 0 deletions(-)
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diff --git a/linux-user/syscall.c b/linux-user/syscall.c
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index df4a538..60cf77f 100644
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--- a/linux-user/syscall.c
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+++ b/linux-user/syscall.c
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@@ -6667,6 +6667,12 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
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__put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
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__put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
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__put_user(stfs.f_namelen, &target_stfs->f_namelen);
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+ __put_user(stfs.f_frsize, &target_stfs->f_frsize);
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+ __put_user(0, &target_stfs->f_spare[0]);
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+ __put_user(0, &target_stfs->f_spare[1]);
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+ __put_user(0, &target_stfs->f_spare[2]);
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+ __put_user(0, &target_stfs->f_spare[3]);
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+ __put_user(0, &target_stfs->f_spare[4]);
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unlock_user_struct(target_stfs, arg2, 1);
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}
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break;
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@@ -6695,6 +6701,12 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
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__put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
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__put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
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__put_user(stfs.f_namelen, &target_stfs->f_namelen);
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+ __put_user(stfs.f_frsize, &target_stfs->f_frsize);
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+ __put_user(0, &target_stfs->f_spare[0]);
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+ __put_user(0, &target_stfs->f_spare[1]);
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+ __put_user(0, &target_stfs->f_spare[2]);
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+ __put_user(0, &target_stfs->f_spare[3]);
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+ __put_user(0, &target_stfs->f_spare[4]);
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unlock_user_struct(target_stfs, arg3, 1);
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}
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break;
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