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linux-user: do prlimit selectively

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Analogous to what commit 5dfa88f7 did for setrlimit, this commit
selectively ignores limits for memory-related resources in prlimit64
calls. This is to prevent too restrictive limits from causing QEMU
itself to malfunction.

Signed-off-by: Tobias Koch <tobias.koch@nonterra.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200305202400.27574-1-tobias.koch@nonterra.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Tobias Koch 2020-03-05 21:24:00 +01:00 committed by Laurent Vivier
parent e0d1673d39
commit 055d92f867
1 changed files with 4 additions and 1 deletions
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5
linux-user/syscall.c
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@ -11871,7 +11871,10 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
struct target_rlimit64 *target_rnew, *target_rold;
struct host_rlimit64 rnew, rold, *rnewp = 0;
int resource = target_to_host_resource(arg2);
if (arg3) {
if (arg3 && (resource != RLIMIT_AS &&
resource != RLIMIT_DATA &&
resource != RLIMIT_STACK)) {
if (!lock_user_struct(VERIFY_READ, target_rnew, arg3, 1)) {
return -TARGET_EFAULT;
}