aboutsummaryrefslogtreecommitdiffstats
path: root/arch/um/os-Linux
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/os-Linux')
-rw-r--r--arch/um/os-Linux/execvp.c1
-rw-r--r--arch/um/os-Linux/file.c9
-rw-r--r--arch/um/os-Linux/helper.c5
-rw-r--r--arch/um/os-Linux/mem.c22
-rw-r--r--arch/um/os-Linux/registers.c4
-rw-r--r--arch/um/os-Linux/sigio.c13
-rw-r--r--arch/um/os-Linux/signal.c8
-rw-r--r--arch/um/os-Linux/skas/process.c23
-rw-r--r--arch/um/os-Linux/start_up.c2
-rw-r--r--arch/um/os-Linux/time.c6
-rw-r--r--arch/um/os-Linux/umid.c3
-rw-r--r--arch/um/os-Linux/user_syms.c5
-rw-r--r--arch/um/os-Linux/util.c6
13 files changed, 79 insertions, 28 deletions
diff --git a/arch/um/os-Linux/execvp.c b/arch/um/os-Linux/execvp.c
index 84a0777c2a45..c09a5fd5e225 100644
--- a/arch/um/os-Linux/execvp.c
+++ b/arch/um/os-Linux/execvp.c
@@ -93,6 +93,7 @@ int execvp_noalloc(char *buf, const char *file, char *const argv[])
up finding no executable we can use, we want to diagnose
that we did find one but were denied access. */
got_eacces = 1;
+ break;
case ENOENT:
case ESTALE:
case ENOTDIR:
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index e4421dbc4c36..fc4450db59bd 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -625,6 +625,15 @@ int os_falloc_punch(int fd, unsigned long long offset, int len)
return n;
}
+int os_falloc_zeroes(int fd, unsigned long long offset, int len)
+{
+ int n = fallocate(fd, FALLOC_FL_ZERO_RANGE|FALLOC_FL_KEEP_SIZE, offset, len);
+
+ if (n < 0)
+ return -errno;
+ return n;
+}
+
int os_eventfd(unsigned int initval, int flags)
{
int fd = eventfd(initval, flags);
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c
index 32e88baf18dd..b459745f52e2 100644
--- a/arch/um/os-Linux/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -4,6 +4,7 @@
*/
#include <stdlib.h>
+#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sched.h>
@@ -99,6 +100,10 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv)
CATCH_EINTR(waitpid(pid, NULL, __WALL));
}
+ if (ret < 0)
+ printk(UM_KERN_ERR "run_helper : failed to exec %s on host: %s\n",
+ argv[0], strerror(-ret));
+
out_free2:
kfree(data.buf);
out_close:
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 3c1b77474d2d..8530b2e08604 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -17,6 +17,28 @@
#include <init.h>
#include <os.h>
+/*
+ * kasan_map_memory - maps memory from @start with a size of @len.
+ * The allocated memory is filled with zeroes upon success.
+ * @start: the start address of the memory to be mapped
+ * @len: the length of the memory to be mapped
+ *
+ * This function is used to map shadow memory for KASAN in uml
+ */
+void kasan_map_memory(void *start, size_t len)
+{
+ if (mmap(start,
+ len,
+ PROT_READ|PROT_WRITE,
+ MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE|MAP_NORESERVE,
+ -1,
+ 0) == MAP_FAILED) {
+ os_info("Couldn't allocate shadow memory: %s\n.",
+ strerror(errno));
+ exit(1);
+ }
+}
+
/* Set by make_tempfile() during early boot. */
static char *tempdir = NULL;
diff --git a/arch/um/os-Linux/registers.c b/arch/um/os-Linux/registers.c
index 2d9270508e15..b123955be7ac 100644
--- a/arch/um/os-Linux/registers.c
+++ b/arch/um/os-Linux/registers.c
@@ -21,7 +21,7 @@ int save_registers(int pid, struct uml_pt_regs *regs)
return 0;
}
-int restore_registers(int pid, struct uml_pt_regs *regs)
+int restore_pid_registers(int pid, struct uml_pt_regs *regs)
{
int err;
@@ -36,7 +36,7 @@ int restore_registers(int pid, struct uml_pt_regs *regs)
static unsigned long exec_regs[MAX_REG_NR];
static unsigned long exec_fp_regs[FP_SIZE];
-int init_registers(int pid)
+int init_pid_registers(int pid)
{
int err;
diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index 6597ea1986ff..37d60e72cf26 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -3,6 +3,7 @@
* Copyright (C) 2002 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
+#include <linux/minmax.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
@@ -50,7 +51,7 @@ static struct pollfds all_sigio_fds;
static int write_sigio_thread(void *unused)
{
- struct pollfds *fds, tmp;
+ struct pollfds *fds;
struct pollfd *p;
int i, n, respond_fd;
char c;
@@ -77,9 +78,7 @@ static int write_sigio_thread(void *unused)
"write_sigio_thread : "
"read on socket failed, "
"err = %d\n", errno);
- tmp = current_poll;
- current_poll = next_poll;
- next_poll = tmp;
+ swap(current_poll, next_poll);
respond_fd = sigio_private[1];
}
else {
@@ -132,7 +131,7 @@ static void update_thread(void)
int n;
char c;
- flags = set_signals_trace(0);
+ flags = um_set_signals_trace(0);
CATCH_EINTR(n = write(sigio_private[0], &c, sizeof(c)));
if (n != sizeof(c)) {
printk(UM_KERN_ERR "update_thread : write failed, err = %d\n",
@@ -147,7 +146,7 @@ static void update_thread(void)
goto fail;
}
- set_signals_trace(flags);
+ um_set_signals_trace(flags);
return;
fail:
/* Critical section start */
@@ -161,7 +160,7 @@ static void update_thread(void)
close(write_sigio_fds[0]);
close(write_sigio_fds[1]);
/* Critical section end */
- set_signals_trace(flags);
+ um_set_signals_trace(flags);
}
int __add_sigio_fd(int fd)
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 6cf098c23a39..24a403a70a02 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -94,7 +94,7 @@ void sig_handler(int sig, struct siginfo *si, mcontext_t *mc)
sig_handler_common(sig, si, mc);
- set_signals_trace(enabled);
+ um_set_signals_trace(enabled);
}
static void timer_real_alarm_handler(mcontext_t *mc)
@@ -126,7 +126,7 @@ void timer_alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc)
signals_active &= ~SIGALRM_MASK;
- set_signals_trace(enabled);
+ um_set_signals_trace(enabled);
}
void deliver_alarm(void) {
@@ -348,7 +348,7 @@ void unblock_signals(void)
}
}
-int set_signals(int enable)
+int um_set_signals(int enable)
{
int ret;
if (signals_enabled == enable)
@@ -362,7 +362,7 @@ int set_signals(int enable)
return ret;
}
-int set_signals_trace(int enable)
+int um_set_signals_trace(int enable)
{
int ret;
if (signals_enabled == enable)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 87d3129e7362..b24db6017ded 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -5,6 +5,7 @@
*/
#include <stdlib.h>
+#include <stdbool.h>
#include <unistd.h>
#include <sched.h>
#include <errno.h>
@@ -251,7 +252,7 @@ static int userspace_tramp(void *stack)
signal(SIGTERM, SIG_DFL);
signal(SIGWINCH, SIG_IGN);
- fd = phys_mapping(to_phys(__syscall_stub_start), &offset);
+ fd = phys_mapping(uml_to_phys(__syscall_stub_start), &offset);
addr = mmap64((void *) STUB_CODE, UM_KERN_PAGE_SIZE,
PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset);
if (addr == MAP_FAILED) {
@@ -261,7 +262,7 @@ static int userspace_tramp(void *stack)
}
if (stack != NULL) {
- fd = phys_mapping(to_phys(stack), &offset);
+ fd = phys_mapping(uml_to_phys(stack), &offset);
addr = mmap((void *) STUB_DATA,
UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_SHARED, fd, offset);
@@ -534,7 +535,7 @@ int copy_context_skas0(unsigned long new_stack, int pid)
struct stub_data *data = (struct stub_data *) current_stack;
struct stub_data *child_data = (struct stub_data *) new_stack;
unsigned long long new_offset;
- int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset);
+ int new_fd = phys_mapping(uml_to_phys((void *)new_stack), &new_offset);
/*
* prepare offset and fd of child's stack as argument for parent's
@@ -707,10 +708,24 @@ void halt_skas(void)
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_HALT);
}
+static bool noreboot;
+
+static int __init noreboot_cmd_param(char *str, int *add)
+{
+ noreboot = true;
+ return 0;
+}
+
+__uml_setup("noreboot", noreboot_cmd_param,
+"noreboot\n"
+" Rather than rebooting, exit always, akin to QEMU's -no-reboot option.\n"
+" This is useful if you're using CONFIG_PANIC_TIMEOUT in order to catch\n"
+" crashes in CI\n");
+
void reboot_skas(void)
{
block_signals_trace();
- UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT);
+ UML_LONGJMP(&initial_jmpbuf, noreboot ? INIT_JMP_HALT : INIT_JMP_REBOOT);
}
void __switch_mm(struct mm_id *mm_idp)
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 8a72c99994eb..e3ee4db58b40 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -368,7 +368,7 @@ void __init os_early_checks(void)
check_tmpexec();
pid = start_ptraced_child();
- if (init_registers(pid))
+ if (init_pid_registers(pid))
fatal("Failed to initialize default registers");
stop_ptraced_child(pid, 1, 1);
}
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index 6c5041c5560b..4d5591d96d8c 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -18,12 +18,6 @@
static timer_t event_high_res_timer = 0;
-static inline long long timeval_to_ns(const struct timeval *tv)
-{
- return ((long long) tv->tv_sec * UM_NSEC_PER_SEC) +
- tv->tv_usec * UM_NSEC_PER_USEC;
-}
-
static inline long long timespec_to_ns(const struct timespec *ts)
{
return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) + ts->tv_nsec;
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
index a3dd61521d24..7a1abb829930 100644
--- a/arch/um/os-Linux/umid.c
+++ b/arch/um/os-Linux/umid.c
@@ -136,7 +136,7 @@ out:
static inline int is_umdir_used(char *dir)
{
char pid[sizeof("nnnnnnnnn")], *end, *file;
- int dead, fd, p, n, err;
+ int fd, p, n, err;
size_t filelen = strlen(dir) + sizeof("/pid") + 1;
file = malloc(filelen);
@@ -145,7 +145,6 @@ static inline int is_umdir_used(char *dir)
snprintf(file, filelen, "%s/pid", dir);
- dead = 0;
fd = open(file, O_RDONLY);
if (fd < 0) {
fd = -errno;
diff --git a/arch/um/os-Linux/user_syms.c b/arch/um/os-Linux/user_syms.c
index 715594fe5719..fd575ecbcaec 100644
--- a/arch/um/os-Linux/user_syms.c
+++ b/arch/um/os-Linux/user_syms.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
+#define __NO_FORTIFY
#include <linux/types.h>
#include <linux/module.h>
@@ -27,10 +28,10 @@ EXPORT_SYMBOL(strstr);
#ifndef __x86_64__
extern void *memcpy(void *, const void *, size_t);
EXPORT_SYMBOL(memcpy);
-#endif
-
EXPORT_SYMBOL(memmove);
EXPORT_SYMBOL(memset);
+#endif
+
EXPORT_SYMBOL(printf);
/* Here, instead, I can provide a fake prototype. Yes, someone cares: genksyms.
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 41297ec404bf..fc0f2a9dee5a 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -14,6 +14,7 @@
#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/utsname.h>
+#include <sys/random.h>
#include <init.h>
#include <os.h>
@@ -96,6 +97,11 @@ static inline void __attribute__ ((noreturn)) uml_abort(void)
exit(127);
}
+ssize_t os_getrandom(void *buf, size_t len, unsigned int flags)
+{
+ return getrandom(buf, len, flags);
+}
+
/*
* UML helper threads must not handle SIGWINCH/INT/TERM
*/
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.