Signed-off-by: Mathura_Kumar <academic1mathura@gmail.com>
---
include/linux/compat.h | 6 +-
include/linux/syscalls.h | 6 +
include/uapi/asm-generic/unistd.h | 7 +-
include/uapi/linux/mqueue.h | 18 ++-
ipc/mqueue.c | 186 ++++++++++++++++++++++++++++--
ipc/msg.c | 2 +-
ipc/msgutil.c | 48 ++++----
ipc/util.h | 3 +-
kernel/sys_ni.c | 1 +
9 files changed, 235 insertions(+), 42 deletions(-)
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 56cebaff0c91..9f5ca26e76d8 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -22,6 +22,7 @@
#include <asm/compat.h>
#include <asm/siginfo.h>
#include <asm/signal.h>
+#include <linux/mqueue.h>
#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
/*
@@ -801,8 +802,9 @@ asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
const struct iovec __user *vec,
unsigned long vlen, loff_t pos, rwf_t flags);
#endif
-
-
+asmlinkage long compat_sys_mq_timedreceive2(mqd_t mqdes, struct compat_mq_timedreceive2_args __user *uargs,
+ unsigned int flags, unsigned long index,
+ struct old_timespec32 __user *abs_timeout);
/*
* Deprecated system calls which are still defined in
* include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 02bd6ddb6278..993e570c90ab 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -79,6 +79,7 @@ struct mnt_id_req;
struct ns_id_req;
struct xattr_args;
struct file_attr;
+struct mq_timedreceive2_args;
#include <linux/types.h>
#include <linux/aio_abi.h>
@@ -93,6 +94,7 @@ struct file_attr;
#include <linux/key.h>
#include <linux/personality.h>
#include <trace/syscall.h>
+#include <linux/mqueue.h>
#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
/*
@@ -746,6 +748,10 @@ asmlinkage long sys_mq_timedsend_time32(mqd_t mqdes,
const char __user *u_msg_ptr,
unsigned int msg_len, unsigned int msg_prio,
const struct old_timespec32 __user *u_abs_timeout);
+asmlinkage long
+sys_mq_timedreceive2(mqd_t mqdes, struct mq_timedreceive2_args __user *uargs,
+ unsigned int flags, unsigned long index,
+ struct __kernel_timespec __user *abs_timeout);
asmlinkage long sys_msgget(key_t key, int msgflg);
asmlinkage long sys_old_msgctl(int msqid, int cmd, struct msqid_ds __user *buf);
asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf);
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index a627acc8fb5f..200ee7fde5c4 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -863,9 +863,12 @@ __SYSCALL(__NR_listns, sys_listns)
#define __NR_rseq_slice_yield 471
__SYSCALL(__NR_rseq_slice_yield, sys_rseq_slice_yield)
-#undef __NR_syscalls
-#define __NR_syscalls 472
+#define __NR_mq_timedreceive2 472
+__SC_COMP(__NR_mq_timedreceive2, sys_mq_timedreceive2,
+ compat_sys_mq_timedreceive2)
+#undef __NR_syscalls
+#define __NR_syscalls 473
/*
* 32 bit systems traditionally used different
* syscalls for off_t and loff_t arguments, while
diff --git a/include/uapi/linux/mqueue.h b/include/uapi/linux/mqueue.h
index b516b66840ad..9a4f5dfa7a68 100644
--- a/include/uapi/linux/mqueue.h
+++ b/include/uapi/linux/mqueue.h
@@ -18,7 +18,6 @@
#ifndef _LINUX_MQUEUE_H
#define _LINUX_MQUEUE_H
-
#include <linux/types.h>
#define MQ_PRIO_MAX 32768
@@ -33,6 +32,23 @@ struct mq_attr {
__kernel_long_t __reserved[4]; /* ignored for input, zeroed for output */
};
+struct mq_timedreceive2_args {
+ size_t msg_len;
+ unsigned int *msg_prio;
+ char *msg_ptr;
+};
+
+#ifdef CONFIG_COMPAT
+#include <asm/compat.h>
+
+struct compat_mq_timedreceive2_args {
+ compat_size_t msg_len;
+ compat_uptr_t msg_prio;
+ compat_uptr_t msg_ptr;
+};
+
+#endif
+
/*
* SIGEV_THREAD implementation:
* SIGEV_THREAD must be implemented in user space. If SIGEV_THREAD is passed
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 4798b375972b..78dc414967a2 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -53,6 +53,7 @@ struct mqueue_fs_context {
#define SEND 0
#define RECV 1
+#define MQ_PEEK 2
#define STATE_NONE 0
#define STATE_READY 1
@@ -1230,6 +1231,115 @@ static int do_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
return ret;
}
+static struct msg_msg *mq_peek_index(struct mqueue_inode_info *info, int index)
+{
+ struct rb_node *node;
+ struct posix_msg_tree_node *leaf;
+ struct msg_msg *msg;
+
+ int count = 0;
+
+ /* Start from highest priority */
+ node = rb_last(&info->msg_tree);
+ while (node) {
+ leaf = rb_entry(node, struct posix_msg_tree_node, rb_node);
+ list_for_each_entry(msg, &leaf->msg_list, m_list) {
+ if (count == index)
+ return msg;
+ count++;
+ }
+
+ node = rb_prev(node);
+ }
+
+ return NULL;
+}
+
+static int do_mq_timedreceive2(mqd_t mqdes, struct mq_timedreceive2_args *args,
+ unsigned int flags, unsigned long index,
+ struct timespec64 *ts)
+{
+ ssize_t ret;
+ struct msg_msg *msg_ptr, *k_msg_buffer;
+ long k_m_type;
+ size_t k_m_ts;
+ struct inode *inode;
+ struct mqueue_inode_info *info;
+
+ if (!(flags & MQ_PEEK)) {
+ return do_mq_timedreceive(mqdes, args->msg_ptr, args->msg_len,
+ args->msg_prio, ts);
+ }
+ audit_mq_sendrecv(mqdes, args->msg_len, 0, ts);
+ CLASS(fd, f)(mqdes);
+ if (fd_empty(f))
+ return -EBADF;
+
+ inode = file_inode(fd_file(f));
+ if (unlikely(fd_file(f)->f_op != &mqueue_file_operations))
+ return -EBADF;
+ info = MQUEUE_I(inode);
+ audit_file(fd_file(f));
+
+ if (unlikely(!(fd_file(f)->f_mode & FMODE_READ)))
+ return -EBADF;
+
+ if (unlikely(args->msg_len < info->attr.mq_msgsize))
+ return -EMSGSIZE;
+ if (index >= (unsigned long)info->attr.mq_maxmsg)
+ return -ENOENT;
+
+ spin_lock(&info->lock);
+ if (info->attr.mq_curmsgs == 0) {
+ spin_unlock(&info->lock);
+ return -EAGAIN;
+ }
+ msg_ptr = mq_peek_index(info, index);
+ if (!msg_ptr) {
+ spin_unlock(&info->lock);
+ return -ENOENT;
+ }
+ k_m_type = msg_ptr->m_type;
+ k_m_ts = msg_ptr->m_ts;
+ spin_unlock(&info->lock);
+
+ k_msg_buffer = alloc_msg(k_m_ts);
+ if (!k_msg_buffer)
+ return -ENOMEM;
+
+ /*
+ * Two spin locks are necessary here. We are avoiding atomic memory
+ * allocation and premature allocation before confirming that
+ * a message actually exists to peek.
+ */
+ spin_lock(&info->lock);
+ msg_ptr = mq_peek_index(info, index);
+ if (!msg_ptr || msg_ptr->m_type != k_m_type ||
+ msg_ptr->m_ts != k_m_ts) {
+ spin_unlock(&info->lock);
+ free_msg(k_msg_buffer);
+ return -EAGAIN;
+ }
+ if (IS_ERR(copy_msg(msg_ptr, k_msg_buffer, k_m_ts))) {
+ spin_unlock(&info->lock);
+ free_msg(k_msg_buffer);
+ return -EINVAL;
+ }
+ spin_unlock(&info->lock);
+
+ ret = k_msg_buffer->m_ts;
+ if (args->msg_prio && put_user(k_m_type, args->msg_prio)) {
+ free_msg(k_msg_buffer);
+ return -EFAULT;
+ }
+ if (store_msg(args->msg_ptr, k_msg_buffer, k_m_ts)) {
+ free_msg(k_msg_buffer);
+ return -EFAULT;
+ }
+ free_msg(k_msg_buffer);
+ return ret;
+}
+
SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr,
size_t, msg_len, unsigned int, msg_prio,
const struct __kernel_timespec __user *, u_abs_timeout)
@@ -1258,6 +1368,27 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
return do_mq_timedreceive(mqdes, u_msg_ptr, msg_len, u_msg_prio, p);
}
+SYSCALL_DEFINE5(mq_timedreceive2, mqd_t, mqdes,
+ struct mq_timedreceive2_args __user *, uargs, unsigned int,
+ flags, const unsigned long, index,
+ const struct __kernel_timespec __user *, u_abs_timeout)
+{
+ struct mq_timedreceive2_args args;
+ struct timespec64 ts, *p = NULL;
+
+ if (copy_from_user(&args, uargs, sizeof(args)))
+ return -EFAULT;
+
+ if (u_abs_timeout) {
+ int res = prepare_timeout(u_abs_timeout, &ts);
+
+ if (res)
+ return res;
+ p = &ts;
+ }
+ return do_mq_timedreceive2(mqdes, &args, flags, index, p);
+}
+
/*
* Notes: the case when user wants us to deregister (with NULL as pointer)
* and he isn't currently owner of notification, will be silently discarded.
@@ -1449,6 +1580,17 @@ SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
return 0;
}
+#ifdef CONFIG_COMPAT_32BIT_TIME
+static int compat_prepare_timeout(const struct old_timespec32 __user *p,
+ struct timespec64 *ts)
+{
+ if (get_old_timespec32(ts, p))
+ return -EFAULT;
+ if (!timespec64_valid(ts))
+ return -EINVAL;
+ return 0;
+}
+
#ifdef CONFIG_COMPAT
struct compat_mq_attr {
@@ -1490,6 +1632,22 @@ static inline int put_compat_mq_attr(const struct mq_attr *attr,
return 0;
}
+static inline int get_compat_mq_args(struct mq_timedreceive2_args *args,
+ struct compat_mq_timedreceive2_args __user *uargs)
+{
+ struct compat_mq_timedreceive2_args v;
+
+ if (copy_from_user(&v, uargs, sizeof(v)))
+ return -EFAULT;
+
+ memset(args, 0, sizeof(*args));
+ args->msg_len = (size_t)v.msg_len;
+ args->msg_prio = (unsigned int *)compat_ptr(v.msg_prio);
+ args->msg_ptr = (char *)compat_ptr(v.msg_ptr);
+
+ return 0;
+}
+
COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name,
int, oflag, compat_mode_t, mode,
struct compat_mq_attr __user *, u_attr)
@@ -1541,19 +1699,30 @@ COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
return -EFAULT;
return 0;
}
-#endif
-#ifdef CONFIG_COMPAT_32BIT_TIME
-static int compat_prepare_timeout(const struct old_timespec32 __user *p,
- struct timespec64 *ts)
+COMPAT_SYSCALL_DEFINE5(mq_timedreceive2, mqd_t, mqdes,
+ struct compat_mq_timedreceive2_args __user *, uargs,
+ unsigned int, flags, const unsigned long, index,
+ const struct old_timespec32 __user *, u_abs_timeout)
{
- if (get_old_timespec32(ts, p))
+ struct mq_timedreceive2_args args;
+ struct timespec64 ts, *p = NULL;
+
+ if (get_compat_mq_args(&args, uargs))
return -EFAULT;
- if (!timespec64_valid(ts))
- return -EINVAL;
- return 0;
+
+ if (u_abs_timeout) {
+ int res = compat_prepare_timeout(u_abs_timeout, &ts);
+
+ if (res)
+ return res;
+ p = &ts;
+ }
+ return do_mq_timedreceive2(mqdes, &args, flags, index, p);
}
+#endif
+
SYSCALL_DEFINE5(mq_timedsend_time32, mqd_t, mqdes,
const char __user *, u_msg_ptr,
unsigned int, msg_len, unsigned int, msg_prio,
@@ -1583,6 +1752,7 @@ SYSCALL_DEFINE5(mq_timedreceive_time32, mqd_t, mqdes,
}
return do_mq_timedreceive(mqdes, u_msg_ptr, msg_len, u_msg_prio, p);
}
+
#endif
static const struct inode_operations mqueue_dir_inode_operations = {
diff --git a/ipc/msg.c b/ipc/msg.c
index 62996b97f0ac..6392b11dd7f7 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -1156,7 +1156,7 @@ static long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, in
* not update queue parameters.
*/
if (msgflg & MSG_COPY) {
- msg = copy_msg(msg, copy);
+ msg = copy_msg(msg, copy, msg->m_ts);
goto out_unlock0;
}
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index e28f0cecb2ec..c5536ce47cc2 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -51,7 +51,7 @@ static int __init init_msg_buckets(void)
}
subsys_initcall(init_msg_buckets);
-static struct msg_msg *alloc_msg(size_t len)
+struct msg_msg *alloc_msg(size_t len)
{
struct msg_msg *msg;
struct msg_msgseg **pseg;
@@ -122,39 +122,33 @@ struct msg_msg *load_msg(const void __user *src, size_t len)
free_msg(msg);
return ERR_PTR(err);
}
-#ifdef CONFIG_CHECKPOINT_RESTORE
-struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
+
+struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst, size_t len)
{
- struct msg_msgseg *dst_pseg, *src_pseg;
- size_t len = src->m_ts;
- size_t alen;
+ struct msg_msgseg *src_seg, *dst_seg;
+ size_t remaining, chunk;
- if (src->m_ts > dst->m_ts)
+ if (len > src->m_ts)
return ERR_PTR(-EINVAL);
-
- alen = min(len, DATALEN_MSG);
- memcpy(dst + 1, src + 1, alen);
-
- for (dst_pseg = dst->next, src_pseg = src->next;
- src_pseg != NULL;
- dst_pseg = dst_pseg->next, src_pseg = src_pseg->next) {
-
- len -= alen;
- alen = min(len, DATALEN_SEG);
- memcpy(dst_pseg + 1, src_pseg + 1, alen);
+ chunk = min(len, DATALEN_MSG);
+ memcpy(dst + 1, src + 1, chunk);
+ remaining = len - chunk;
+ src_seg = src->next;
+ dst_seg = dst->next;
+ while (remaining > 0 && src_seg && dst_seg) {
+ chunk = min(remaining, DATALEN_SEG);
+ memcpy(dst_seg + 1, src_seg + 1, chunk);
+ remaining -= chunk;
+ src_seg = src_seg->next;
+ dst_seg = dst_seg->next;
}
-
+ if (remaining != 0)
+ return ERR_PTR(-EINVAL);
dst->m_type = src->m_type;
- dst->m_ts = src->m_ts;
-
+ dst->m_ts = src->m_ts;
return dst;
}
-#else
-struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
-{
- return ERR_PTR(-ENOSYS);
-}
-#endif
+
int store_msg(void __user *dest, struct msg_msg *msg, size_t len)
{
size_t alen;
diff --git a/ipc/util.h b/ipc/util.h
index a55d6cebe6d3..374abeee79b3 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -197,8 +197,9 @@ int ipc_parse_version(int *cmd);
extern void free_msg(struct msg_msg *msg);
extern struct msg_msg *load_msg(const void __user *src, size_t len);
-extern struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst);
+extern struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst, size_t len);
extern int store_msg(void __user *dest, struct msg_msg *msg, size_t len);
+extern struct msg_msg *alloc_msg(size_t len);
static inline int ipc_checkid(struct kern_ipc_perm *ipcp, int id)
{
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index add3032da16f..658d6b8274b3 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -391,6 +391,7 @@ COND_SYSCALL(setuid16);
/* restartable sequence */
COND_SYSCALL(rseq);
COND_SYSCALL(rseq_slice_yield);
+COND_SYSCALL(mq_timedreceive2);
COND_SYSCALL(uretprobe);
COND_SYSCALL(uprobe);
--
2.43.0Hi Mathura_Kumar,
kernel test robot noticed the following build warnings:
[auto build test WARNING on perf-tools-next/perf-tools-next]
[also build test WARNING on tip/perf/core perf-tools/perf-tools linus/master v7.0-rc6 next-20260402]
[cannot apply to acme/perf/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Mathura_Kumar/IPC-Added-New-system-call-do_mq_timedreceive2-for-non-destructive-peek-on-posix-mqueue/20260315-143134
base: https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next
patch link: https://lore.kernel.org/r/20260315040827.156558-2-academic1mathura%40gmail.com
patch subject: [PATCH v1 1/4] IPC: Added New system call do_mq_timedreceive2() for non-destructive peek on posix mqueue
config: parisc-allyesconfig (https://download.01.org/0day-ci/archive/20260403/202604030707.7rWWvONm-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260403/202604030707.7rWWvONm-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604030707.7rWWvONm-lkp@intel.com/
All warnings (new ones prefixed by >>):
error: include/uapi/linux/mqueue.h: leak CONFIG_COMPAT to user-space
make[3]: *** [scripts/Makefile.headersinst:63: usr/include/linux/mqueue.h] Error 1
make[3]: Target '__headers' not remade because of errors.
make[2]: *** [Makefile:1431: headers] Error 2
In file included from arch/parisc/kernel/signal32.h:9,
from arch/parisc/kernel/asm-offsets.c:34:
>> include/linux/compat.h:805:65: warning: 'struct compat_mq_timedreceive2_args' declared inside parameter list will not be visible outside of this definition or declaration
805 | asmlinkage long compat_sys_mq_timedreceive2(mqd_t mqdes, struct compat_mq_timedreceive2_args __user *uargs,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:248: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +805 include/linux/compat.h
799
800 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
801 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
802 const struct iovec __user *vec,
803 unsigned long vlen, loff_t pos, rwf_t flags);
804 #endif
> 805 asmlinkage long compat_sys_mq_timedreceive2(mqd_t mqdes, struct compat_mq_timedreceive2_args __user *uargs,
806 unsigned int flags, unsigned long index,
807 struct old_timespec32 __user *abs_timeout);
808 /*
809 * Deprecated system calls which are still defined in
810 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
811 */
812
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Mathura_Kumar, kernel test robot noticed the following build errors: [auto build test ERROR on perf-tools-next/perf-tools-next] [also build test ERROR on tip/perf/core perf-tools/perf-tools linus/master v7.0-rc6 next-20260401] [cannot apply to acme/perf/core] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Mathura_Kumar/IPC-Added-New-system-call-do_mq_timedreceive2-for-non-destructive-peek-on-posix-mqueue/20260315-143134 base: https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next patch link: https://lore.kernel.org/r/20260315040827.156558-2-academic1mathura%40gmail.com patch subject: [PATCH v1 1/4] IPC: Added New system call do_mq_timedreceive2() for non-destructive peek on posix mqueue config: arc-allmodconfig (https://download.01.org/0day-ci/archive/20260403/202604030741.FjjnwM09-lkp@intel.com/config) compiler: arc-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260403/202604030741.FjjnwM09-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202604030741.FjjnwM09-lkp@intel.com/ All errors (new ones prefixed by >>): >> error: include/uapi/linux/mqueue.h: leak CONFIG_COMPAT to user-space make[3]: *** [scripts/Makefile.headersinst:63: usr/include/linux/mqueue.h] Error 1 make[3]: Target '__headers' not remade because of errors. make[2]: *** [Makefile:1431: headers] Error 2 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:248: __sub-make] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:248: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
Hi Mathura_Kumar,
kernel test robot noticed the following build warnings:
[auto build test WARNING on perf-tools-next/perf-tools-next]
[also build test WARNING on tip/perf/core perf-tools/perf-tools linus/master v7.0-rc6 next-20260401]
[cannot apply to acme/perf/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Mathura_Kumar/IPC-Added-New-system-call-do_mq_timedreceive2-for-non-destructive-peek-on-posix-mqueue/20260315-143134
base: https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next
patch link: https://lore.kernel.org/r/20260315040827.156558-2-academic1mathura%40gmail.com
patch subject: [PATCH v1 1/4] IPC: Added New system call do_mq_timedreceive2() for non-destructive peek on posix mqueue
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20260403/202604030850.kLrlQyOM-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project e3cbd9984a78422c3799629eb6b5f7f7818c1a11)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260403/202604030850.kLrlQyOM-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604030850.kLrlQyOM-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from init/do_mounts.c:23:
In file included from include/linux/nfs_fs.h:32:
In file included from include/linux/sunrpc/clnt.h:29:
In file included from include/net/ipv6.h:12:
In file included from include/linux/ipv6.h:103:
In file included from include/linux/tcp.h:19:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:44:
In file included from include/uapi/linux/neighbour.h:6:
In file included from include/linux/netlink.h:9:
In file included from include/net/scm.h:13:
In file included from include/net/compat.h:8:
>> include/linux/compat.h:805:65: warning: declaration of 'struct compat_mq_timedreceive2_args' will not be visible outside of this function [-Wvisibility]
805 | asmlinkage long compat_sys_mq_timedreceive2(mqd_t mqdes, struct compat_mq_timedreceive2_args __user *uargs,
| ^
1 warning generated.
vim +805 include/linux/compat.h
799
800 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
801 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
802 const struct iovec __user *vec,
803 unsigned long vlen, loff_t pos, rwf_t flags);
804 #endif
> 805 asmlinkage long compat_sys_mq_timedreceive2(mqd_t mqdes, struct compat_mq_timedreceive2_args __user *uargs,
806 unsigned int flags, unsigned long index,
807 struct old_timespec32 __user *abs_timeout);
808 /*
809 * Deprecated system calls which are still defined in
810 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
811 */
812
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Mathura_Kumar, kernel test robot noticed the following build errors: [auto build test ERROR on perf-tools-next/perf-tools-next] [also build test ERROR on tip/perf/core perf-tools/perf-tools linus/master v7.0-rc3 next-20260313] [cannot apply to acme/perf/core] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Mathura_Kumar/IPC-Added-New-system-call-do_mq_timedreceive2-for-non-destructive-peek-on-posix-mqueue/20260315-143134 base: https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next patch link: https://lore.kernel.org/r/20260315040827.156558-2-academic1mathura%40gmail.com patch subject: [PATCH v1 1/4] IPC: Added New system call do_mq_timedreceive2() for non-destructive peek on posix mqueue config: powerpc64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260315/202603150853.00qBX9c6-lkp@intel.com/config) compiler: powerpc64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260315/202603150853.00qBX9c6-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/r/202603150853.00qBX9c6-lkp@intel.com/ All errors (new ones prefixed by >>): >> error: include/uapi/linux/mqueue.h: leak CONFIG_COMPAT to user-space -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
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