diff mbox series

[PULL,v3,07/16] linux-user: do prlimit selectively

Message ID 20200319092627.51487-8-laurent@vivier.eu (mailing list archive)
State New, archived
Headers show
Series [PULL,v3,01/16] target/i386: Renumber EXCP_SYSCALL | expand

Commit Message

Laurent Vivier March 19, 2020, 9:26 a.m. UTC 
From: Tobias Koch <tobias.koch@nonterra.com>

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>
---
 linux-user/syscall.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 811495c3a0bc..be676c3a4fb4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -11904,7 +11904,10 @@  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;
             }