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linuxkm/module_hooks.c: in dump_to_file(), accommodate mis-prototyped kernel_write() in kernels 3.9-4.13.

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This commit is contained in:
Daniel Pouzzner
2026-03-04 13:12:55 -06:00
parent f67c29ae51
commit fe93ec87b1
1 changed files with 20 additions and 7 deletions
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linuxkm/module_hooks.c
+20 -7
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@@ -268,16 +268,19 @@ static ssize_t dump_to_file(const char *path, const u8 *buf, size_t buf_len)
return ret;
}
fp = filp_open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
fp = filp_open(path, O_WRONLY | O_CREAT, 0644);
if (IS_ERR(fp)) {
pr_err("libwolfssl: cannot open %s: %ld\n", path, PTR_ERR(fp));
return PTR_ERR(fp);
}
WC_SANITIZE_DISABLE();
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
/* kernel_write() exported by 7bb307e894d51 */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
/* kernel_write() fixed by e13ec939e9 */
ret = kernel_write(fp, buf, buf_len, &pos);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
/* kernel_write() exported by 7bb307e894d51 */
ret = kernel_write(fp, (char *)buf, buf_len, pos);
#else
ret = vfs_write(fp, buf, buf_len, &pos);
#endif
@@ -575,12 +578,22 @@ static int wolfssl_init(void)
#ifdef WC_SYM_RELOC_TABLES
if (text_dump_path) {
if (dump_to_file(text_dump_path, (u8 *)__wc_text_start, (size_t)((uintptr_t)__wc_text_end - (uintptr_t)__wc_text_start)) > 0)
pr_info("libwolfssl: dumped .wolfcrypt_text (%zu bytes) to %s.\n", (size_t)((uintptr_t)__wc_text_end - (uintptr_t)__wc_text_start), text_dump_path);
if (dump_to_file(text_dump_path,
(u8 *)__wc_text_start,
(size_t)((uintptr_t)__wc_text_end - (uintptr_t)__wc_text_start)
> 0)
pr_info("libwolfssl: dumped .wolfcrypt_text (%zu bytes) to %s.\n",
(size_t)((uintptr_t)__wc_text_end - (uintptr_t)__wc_text_start),
text_dump_path);
}
if (rodata_dump_path) {
if (dump_to_file(rodata_dump_path, (u8 *)__wc_rodata_start, (size_t)((uintptr_t)__wc_rodata_end - (uintptr_t)__wc_rodata_start)) > 0)
pr_info("libwolfssl: dumped .wolfcrypt_rodata (%zu bytes) to %s.\n", (size_t)((uintptr_t)__wc_rodata_end - (uintptr_t)__wc_rodata_start), rodata_dump_path);
if (dump_to_file(rodata_dump_path,
(u8 *)__wc_rodata_start,
(size_t)((uintptr_t)__wc_rodata_end - (uintptr_t)__wc_rodata_start))
> 0)
pr_info("libwolfssl: dumped .wolfcrypt_rodata (%zu bytes) to %s.\n",
(size_t)((uintptr_t)__wc_rodata_end - (uintptr_t)__wc_rodata_start),
rodata_dump_path);
}
#else
if ((text_dump_path != NULL) ||