diff options
| author | Pavel Kozlov <pavel.kozlov@synopsys.com> | 2023-10-17 14:01:22 +0400 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2023-10-27 18:10:33 +0200 |
| commit | 8c2f6218f81ab5303e07bad4e13f181aa9581d92 (patch) | |
| tree | 14030c5133917d0f27f375c53e05ecd60b761cc1 /include/sys | |
| parent | 223d46f66af17e18be6e1eb2933a2c70eb64ad47 (diff) | |
setrlimit/getrlimit: fix prlimit64 syscall use for 32-bit CPUs
Commit 95e38b37 ("add support for systems without legacy setrlimit/getrlimit
syscalls") has added use of the prlimit64 syscall in getrlimit and setrlimit
functions. This change causes memory corruption on getrlimit call for 32-bit
CPUs like ARC, as ARC doesn't have ugetrlimit syscall and uses prlimit64.
Also, setrlimit has been broken by prlimit64 call on 32-bit CPUs like, i386,
ARM, ARC.
For the prlimit64 syscall the kernel expects an rlimit struct with 64-bit fields,
but on 32-bit CPUs without _FILE_OFFSET_BITS=64 the struct rlimit has 32-bit
fields.
Add safe implementations of getrlimit, setrlimit, prlimit for 32-bit CPUs with a
local struct rlimit64 variable for use in the prlimit64 syscall.
For 64-bit CPUs and configurations with _FILE_OFFSET_BITS=64 use
getrlimit, setrlimit, prlimit as aliases to getrlimit64, setrlimit64 and
prlimit64. Add a new function prlimit64.
Tested on aarch64, arm, i386, arc.
Fixes: 95e38b37 ("add support for systems without legacy setrlimit/getrlimit syscalls")
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
Diffstat (limited to 'include/sys')
| -rw-r--r-- | include/sys/resource.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/sys/resource.h b/include/sys/resource.h index 00c63ff0f..e9fac2c65 100644 --- a/include/sys/resource.h +++ b/include/sys/resource.h @@ -106,6 +106,10 @@ libc_hidden_proto(setpriority) extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource, const struct rlimit *__new_limit, struct rlimit *__old_limit) __THROW; + +extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource, + const struct rlimit64 *__new_limit, + struct rlimit64 *__old_limit) __THROW; #endif __END_DECLS |