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linuxkm/linuxkm_wc_port.h, linuxkm/module_hooks.c: on kernel >= 7.2, remove indirect symbol support for strncpy and add backward-compat implementation wc_linuxkm_strncpy().

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This commit is contained in:
Daniel Pouzzner
2026-06-27 14:34:06 -05:00
parent 538262a5dc
commit bf088dfc3c
2 changed files with 24 additions and 0 deletions
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linuxkm/linuxkm_wc_port.h
+22
View File
@@ -1012,9 +1012,12 @@
#ifndef __ARCH_STRSTR_NO_REDIRECT
typeof(strstr) *strstr;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(7, 2, 0)
/* note strncpy() purged from kernel by 079a028d63 */
#ifndef __ARCH_STRNCPY_NO_REDIRECT
typeof(strncpy) *strncpy;
#endif
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(7, 2, 0) */
#ifndef __ARCH_STRNCAT_NO_REDIRECT
typeof(strncat) *strncat;
#endif
@@ -1364,9 +1367,11 @@
#ifndef __ARCH_STRSTR_NO_REDIRECT
#define strstr WC_PIE_INDIRECT_SYM(strstr)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(7, 2, 0)
#ifndef __ARCH_STRNCPY_NO_REDIRECT
#define strncpy WC_PIE_INDIRECT_SYM(strncpy)
#endif
#endif
#ifndef __ARCH_STRNCAT_NO_REDIRECT
#define strncat WC_PIE_INDIRECT_SYM(strncat)
#endif
@@ -1774,6 +1779,23 @@
#endif /* BUILDING_WOLFSSL */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(7, 2, 0)
/* note strncpy() purged from kernel by 079a028d63 */
static __always_inline char *wc_linuxkm_strncpy(char *dst, const char *src, size_t dsize) {
char *dstart = dst, *dend = dst + dsize;
while (dst < dend) {
if (*src == 0) {
*dst = 0;
/* don't bother zero-filling dst. */
break;
}
*dst++ = *src++;
}
return dstart;
}
#define strncpy wc_linuxkm_strncpy
#endif
#if !defined(BUILDING_WOLFSSL)
/* some caller code needs these. */
#if defined(WOLFSSL_USE_SAVE_VECTOR_REGISTERS)
linuxkm/module_hooks.c
+2
View File
@@ -1412,9 +1412,11 @@ static int set_up_wolfssl_linuxkm_pie_redirect_table(void) {
#ifndef __ARCH_STRSTR_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strstr = strstr;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(7, 2, 0)
#ifndef __ARCH_STRNCPY_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strncpy = strncpy;
#endif
#endif
#ifndef __ARCH_STRNCAT_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strncat = strncat;
#endif