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seccomp: add obsolete argument to command line

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This patch introduces the argument [,obsolete=allow] to the `-sandbox on'
option. It allows Qemu to run safely on old system that still relies on
old system calls.

Signed-off-by: Eduardo Otubo <otubo@redhat.com>
This commit is contained in:
Eduardo Otubo 2017-03-01 23:17:29 +01:00
parent 1bd6152ae2
commit 2b716fa6d6
4 changed files with 53 additions and 5 deletions
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12
qemu-options.hx
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@ -4017,13 +4017,21 @@ Old param mode (ARM only).
ETEXI
DEF("sandbox", HAS_ARG, QEMU_OPTION_sandbox, \
"-sandbox <arg> Enable seccomp mode 2 system call filter (default 'off').\n",
"-sandbox on[,obsolete=allow|deny]\n" \
" Enable seccomp mode 2 system call filter (default 'off').\n" \
" use 'obsolete' to allow obsolete system calls that are provided\n" \
" by the kernel, but typically no longer used by modern\n" \
" C library implementations.\n",
QEMU_ARCH_ALL)
STEXI
@item -sandbox @var{arg}
@item -sandbox @var{arg}[,obsolete=@var{string}]
@findex -sandbox
Enable Seccomp mode 2 system call filter. 'on' will enable syscall filtering and 'off' will
disable it. The default is 'off'.
@table @option
@item obsolete=@var{string}
Enable Obsolete system calls
@end table
ETEXI
DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig,