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1ddae9d67e
It's not really possible to start diagnosing this without knowing the actual error. Also update the mlock2 helper to behave like libc would by setting errno and returning -1. Link: https://lkml.kernel.org/r/20250311-mm-selftests-v4-12-dec210a658f5@google.com Signed-off-by: Brendan Jackman <jackmanb@google.com> Cc: Dev Jain <dev.jain@arm.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Mateusz Guzik <mjguzik@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
55 lines
960 B
C
55 lines
960 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <syscall.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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static int mlock2_(void *start, size_t len, int flags)
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{
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int ret = syscall(__NR_mlock2, start, len, flags);
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if (ret) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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static FILE *seek_to_smaps_entry(unsigned long addr)
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{
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FILE *file;
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char *line = NULL;
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size_t size = 0;
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unsigned long start, end;
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char perms[5];
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unsigned long offset;
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char dev[32];
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unsigned long inode;
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char path[BUFSIZ];
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file = fopen("/proc/self/smaps", "r");
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if (!file)
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ksft_exit_fail_msg("fopen smaps: %s\n", strerror(errno));
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while (getline(&line, &size, file) > 0) {
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if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n",
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&start, &end, perms, &offset, dev, &inode, path) < 6)
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goto next;
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if (start <= addr && addr < end)
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goto out;
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next:
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free(line);
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line = NULL;
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size = 0;
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}
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fclose(file);
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file = NULL;
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out:
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free(line);
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return file;
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}
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