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-rw-r--r--arch/x86/include/asm/asm.h22
-rw-r--r--arch/x86/include/asm/extable.h44
-rw-r--r--arch/x86/include/asm/extable_fixup_types.h19
-rw-r--r--arch/x86/include/asm/fpu/internal.h4
-rw-r--r--arch/x86/include/asm/msr.h4
-rw-r--r--arch/x86/include/asm/segment.h2
-rw-r--r--arch/x86/kernel/cpu/mce/core.c24
-rw-r--r--arch/x86/kernel/cpu/mce/internal.h10
-rw-r--r--arch/x86/kernel/cpu/mce/severity.c21
-rw-r--r--arch/x86/mm/extable.c123
-rw-r--r--arch/x86/net/bpf_jit_comp.c11
11 files changed, 131 insertions, 153 deletions
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 719955e658a2..6aadb9a620ee 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -122,14 +122,17 @@
#ifdef __KERNEL__
+# include <asm/extable_fixup_types.h>
+
/* Exception table entry */
#ifdef __ASSEMBLY__
-# define _ASM_EXTABLE_HANDLE(from, to, handler) \
+
+# define _ASM_EXTABLE_TYPE(from, to, type) \
.pushsection "__ex_table","a" ; \
.balign 4 ; \
.long (from) - . ; \
.long (to) - . ; \
- .long (handler) - . ; \
+ .long type ; \
.popsection
# ifdef CONFIG_KPROBES
@@ -143,13 +146,13 @@
# endif
#else /* ! __ASSEMBLY__ */
-# define _EXPAND_EXTABLE_HANDLE(x) #x
-# define _ASM_EXTABLE_HANDLE(from, to, handler) \
+
+# define _ASM_EXTABLE_TYPE(from, to, type) \
" .pushsection \"__ex_table\",\"a\"\n" \
" .balign 4\n" \
" .long (" #from ") - .\n" \
" .long (" #to ") - .\n" \
- " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \
+ " .long " __stringify(type) " \n" \
" .popsection\n"
/* For C file, we already have NOKPROBE_SYMBOL macro */
@@ -165,17 +168,16 @@ register unsigned long current_stack_pointer asm(_ASM_SP);
#endif /* __ASSEMBLY__ */
#define _ASM_EXTABLE(from, to) \
- _ASM_EXTABLE_HANDLE(from, to, ex_handler_default)
+ _ASM_EXTABLE_TYPE(from, to, EX_TYPE_DEFAULT)
#define _ASM_EXTABLE_UA(from, to) \
- _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess)
+ _ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS)
#define _ASM_EXTABLE_CPY(from, to) \
- _ASM_EXTABLE_HANDLE(from, to, ex_handler_copy)
+ _ASM_EXTABLE_TYPE(from, to, EX_TYPE_COPY)
#define _ASM_EXTABLE_FAULT(from, to) \
- _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
+ _ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT)
#endif /* __KERNEL__ */
-
#endif /* _ASM_X86_ASM_H */
diff --git a/arch/x86/include/asm/extable.h b/arch/x86/include/asm/extable.h
index 1f0cbc52937c..93f400eb728f 100644
--- a/arch/x86/include/asm/extable.h
+++ b/arch/x86/include/asm/extable.h
@@ -1,12 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_EXTABLE_H
#define _ASM_X86_EXTABLE_H
+
+#include <asm/extable_fixup_types.h>
+
/*
- * The exception table consists of triples of addresses relative to the
- * exception table entry itself. The first address is of an instruction
- * that is allowed to fault, the second is the target at which the program
- * should continue. The third is a handler function to deal with the fault
- * caused by the instruction in the first field.
+ * The exception table consists of two addresses relative to the
+ * exception table entry itself and a type selector field.
+ *
+ * The first address is of an instruction that is allowed to fault, the
+ * second is the target at which the program should continue.
+ *
+ * The type entry is used by fixup_exception() to select the handler to
+ * deal with the fault caused by the instruction in the first field.
*
* All the routines below use bits of fixup code that are out of line
* with the main instruction path. This means when everything is well,
@@ -15,7 +21,7 @@
*/
struct exception_table_entry {
- int insn, fixup, handler;
+ int insn, fixup, type;
};
struct pt_regs;
@@ -25,21 +31,27 @@ struct pt_regs;
do { \
(a)->fixup = (b)->fixup + (delta); \
(b)->fixup = (tmp).fixup - (delta); \
- (a)->handler = (b)->handler + (delta); \
- (b)->handler = (tmp).handler - (delta); \
+ (a)->type = (b)->type; \
+ (b)->type = (tmp).type; \
} while (0)
-enum handler_type {
- EX_HANDLER_NONE,
- EX_HANDLER_FAULT,
- EX_HANDLER_UACCESS,
- EX_HANDLER_OTHER
-};
-
extern int fixup_exception(struct pt_regs *regs, int trapnr,
unsigned long error_code, unsigned long fault_addr);
extern int fixup_bug(struct pt_regs *regs, int trapnr);
-extern enum handler_type ex_get_fault_handler_type(unsigned long ip);
+extern int ex_get_fixup_type(unsigned long ip);
extern void early_fixup_exception(struct pt_regs *regs, int trapnr);
+#ifdef CONFIG_X86_MCE
+extern void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr);
+#else
+static inline void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr) { }
+#endif
+
+#if defined(CONFIG_BPF_JIT) && defined(CONFIG_X86_64)
+bool ex_handler_bpf(const struct exception_table_entry *x, struct pt_regs *regs);
+#else
+static inline bool ex_handler_bpf(const struct exception_table_entry *x,
+ struct pt_regs *regs) { return false; }
+#endif
+
#endif
diff --git a/arch/x86/include/asm/extable_fixup_types.h b/arch/x86/include/asm/extable_fixup_types.h
new file mode 100644
index 000000000000..0adc117618e6
--- /dev/null
+++ b/arch/x86/include/asm/extable_fixup_types.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_EXTABLE_FIXUP_TYPES_H
+#define _ASM_X86_EXTABLE_FIXUP_TYPES_H
+
+#define EX_TYPE_NONE 0
+#define EX_TYPE_DEFAULT 1
+#define EX_TYPE_FAULT 2
+#define EX_TYPE_UACCESS 3
+#define EX_TYPE_COPY 4
+#define EX_TYPE_CLEAR_FS 5
+#define EX_TYPE_FPU_RESTORE 6
+#define EX_TYPE_WRMSR 7
+#define EX_TYPE_RDMSR 8
+#define EX_TYPE_BPF 9
+
+#define EX_TYPE_WRMSR_IN_MCE 10
+#define EX_TYPE_RDMSR_IN_MCE 11
+
+#endif
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h
index 5a18694a89b2..ce6fc4f8d1d1 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -126,7 +126,7 @@ extern void save_fpregs_to_fpstate(struct fpu *fpu);
#define kernel_insn(insn, output, input...) \
asm volatile("1:" #insn "\n\t" \
"2:\n" \
- _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_fprestore) \
+ _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_FPU_RESTORE) \
: output : input)
static inline int fnsave_to_user_sigframe(struct fregs_state __user *fx)
@@ -253,7 +253,7 @@ static inline void fxsave(struct fxregs_state *fx)
XRSTORS, X86_FEATURE_XSAVES) \
"\n" \
"3:\n" \
- _ASM_EXTABLE_HANDLE(661b, 3b, ex_handler_fprestore)\
+ _ASM_EXTABLE_TYPE(661b, 3b, EX_TYPE_FPU_RESTORE) \
: \
: "D" (st), "m" (*st), "a" (lmask), "d" (hmask) \
: "memory")
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index a3f87f1015d3..6b52182e178a 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -92,7 +92,7 @@ static __always_inline unsigned long long __rdmsr(unsigned int msr)
asm volatile("1: rdmsr\n"
"2:\n"
- _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_rdmsr_unsafe)
+ _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_RDMSR)
: EAX_EDX_RET(val, low, high) : "c" (msr));
return EAX_EDX_VAL(val, low, high);
@@ -102,7 +102,7 @@ static __always_inline void __wrmsr(unsigned int msr, u32 low, u32 high)
{
asm volatile("1: wrmsr\n"
"2:\n"
- _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_wrmsr_unsafe)
+ _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_WRMSR)
: : "c" (msr), "a"(low), "d" (high) : "memory");
}
diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index 72044026eb3c..8dd8e8ec9fa5 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -339,7 +339,7 @@ static inline void __loadsegment_fs(unsigned short value)
"1: movw %0, %%fs \n"
"2: \n"
- _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_clear_fs)
+ _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_CLEAR_FS)
: : "rm" (value) : "memory");
}
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 428eed98742b..cd919fce3ca3 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -373,7 +373,7 @@ static int msr_to_offset(u32 msr)
return -1;
}
-static void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr)
+void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr)
{
if (wrmsr) {
pr_emerg("MSR access error: WRMSR to 0x%x (tried to write 0x%08x%08x) at rIP: 0x%lx (%pS)\n",
@@ -392,15 +392,6 @@ static void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr)
cpu_relax();
}
-__visible bool ex_handler_rdmsr_fault(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
-{
- ex_handler_msr_mce(regs, false);
- return true;
-}
-
/* MSR access wrappers used for error injection */
static noinstr u64 mce_rdmsrl(u32 msr)
{
@@ -430,22 +421,13 @@ static noinstr u64 mce_rdmsrl(u32 msr)
*/
asm volatile("1: rdmsr\n"
"2:\n"
- _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_rdmsr_fault)
+ _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_RDMSR_IN_MCE)
: EAX_EDX_RET(val, low, high) : "c" (msr));
return EAX_EDX_VAL(val, low, high);
}
-__visible bool ex_handler_wrmsr_fault(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
-{
- ex_handler_msr_mce(regs, true);
- return true;
-}
-
static noinstr void mce_wrmsrl(u32 msr, u64 v)
{
u32 low, high;
@@ -470,7 +452,7 @@ static noinstr void mce_wrmsrl(u32 msr, u64 v)
/* See comment in mce_rdmsrl() */
asm volatile("1: wrmsr\n"
"2:\n"
- _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_wrmsr_fault)
+ _ASM_EXTABLE_TYPE(1b, 2b, EX_TYPE_WRMSR_IN_MCE)
: : "c" (msr), "a"(low), "d" (high) : "memory");
}
diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h
index 95099225defc..3463f8cedb32 100644
--- a/arch/x86/kernel/cpu/mce/internal.h
+++ b/arch/x86/kernel/cpu/mce/internal.h
@@ -186,14 +186,4 @@ extern bool amd_filter_mce(struct mce *m);
static inline bool amd_filter_mce(struct mce *m) { return false; }
#endif
-__visible bool ex_handler_rdmsr_fault(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr);
-
-__visible bool ex_handler_wrmsr_fault(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr);
-
#endif /* __X86_MCE_INTERNAL_H__ */
diff --git a/arch/x86/kernel/cpu/mce/severity.c b/arch/x86/kernel/cpu/mce/severity.c
index 17e631443116..74fe763bffda 100644
--- a/arch/x86/kernel/cpu/mce/severity.c
+++ b/arch/x86/kernel/cpu/mce/severity.c
@@ -265,25 +265,24 @@ static bool is_copy_from_user(struct pt_regs *regs)
*/
static int error_context(struct mce *m, struct pt_regs *regs)
{
- enum handler_type t;
-
if ((m->cs & 3) == 3)
return IN_USER;
if (!mc_recoverable(m->mcgstatus))
return IN_KERNEL;
- t = ex_get_fault_handler_type(m->ip);
- if (t == EX_HANDLER_FAULT) {
- m->kflags |= MCE_IN_KERNEL_RECOV;
- return IN_KERNEL_RECOV;
- }
- if (t == EX_HANDLER_UACCESS && regs && is_copy_from_user(regs)) {
- m->kflags |= MCE_IN_KERNEL_RECOV;
+ switch (ex_get_fixup_type(m->ip)) {
+ case EX_TYPE_UACCESS:
+ case EX_TYPE_COPY:
+ if (!regs || !is_copy_from_user(regs))
+ return IN_KERNEL;
m->kflags |= MCE_IN_KERNEL_COPYIN;
+ fallthrough;
+ case EX_TYPE_FAULT:
+ m->kflags |= MCE_IN_KERNEL_RECOV;
return IN_KERNEL_RECOV;
+ default:
+ return IN_KERNEL;
}
-
- return IN_KERNEL;
}
static int mce_severity_amd_smca(struct mce *m, enum context err_ctx)
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
index d9a1046f3a98..5db46df409b5 100644
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -9,40 +9,25 @@
#include <asm/traps.h>
#include <asm/kdebug.h>
-typedef bool (*ex_handler_t)(const struct exception_table_entry *,
- struct pt_regs *, int, unsigned long,
- unsigned long);
-
static inline unsigned long
ex_fixup_addr(const struct exception_table_entry *x)
{
return (unsigned long)&x->fixup + x->fixup;
}
-static inline ex_handler_t
-ex_fixup_handler(const struct exception_table_entry *x)
-{
- return (ex_handler_t)((unsigned long)&x->handler + x->handler);
-}
-__visible bool ex_handler_default(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_default(const struct exception_table_entry *fixup,
+ struct pt_regs *regs)
{
regs->ip = ex_fixup_addr(fixup);
return true;
}
-EXPORT_SYMBOL(ex_handler_default);
-__visible bool ex_handler_fault(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_fault(const struct exception_table_entry *fixup,
+ struct pt_regs *regs, int trapnr)
{
regs->ax = trapnr;
- return ex_handler_default(fixup, regs, trapnr, error_code, fault_addr);
+ return ex_handler_default(fixup, regs);
}
-EXPORT_SYMBOL_GPL(ex_handler_fault);
/*
* Handler for when we fail to restore a task's FPU state. We should never get
@@ -54,10 +39,8 @@ EXPORT_SYMBOL_GPL(ex_handler_fault);
* of vulnerability by restoring from the initial state (essentially, zeroing
* out all the FPU registers) if we can't restore from the task's FPU state.
*/
-__visible bool ex_handler_fprestore(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_fprestore(const struct exception_table_entry *fixup,
+ struct pt_regs *regs)
{
regs->ip = ex_fixup_addr(fixup);
@@ -67,32 +50,23 @@ __visible bool ex_handler_fprestore(const struct exception_table_entry *fixup,
__restore_fpregs_from_fpstate(&init_fpstate, xfeatures_mask_fpstate());
return true;
}
-EXPORT_SYMBOL_GPL(ex_handler_fprestore);
-__visible bool ex_handler_uaccess(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_uaccess(const struct exception_table_entry *fixup,
+ struct pt_regs *regs, int trapnr)
{
WARN_ONCE(trapnr == X86_TRAP_GP, "General protection fault in user access. Non-canonical address?");
- return ex_handler_default(fixup, regs, trapnr, error_code, fault_addr);
+ return ex_handler_default(fixup, regs);
}
-EXPORT_SYMBOL(ex_handler_uaccess);
-__visible bool ex_handler_copy(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_copy(const struct exception_table_entry *fixup,
+ struct pt_regs *regs, int trapnr)
{
WARN_ONCE(trapnr == X86_TRAP_GP, "General protection fault in user access. Non-canonical address?");
- return ex_handler_fault(fixup, regs, trapnr, error_code, fault_addr);
+ return ex_handler_fault(fixup, regs, trapnr);
}
-EXPORT_SYMBOL(ex_handler_copy);
-__visible bool ex_handler_rdmsr_unsafe(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_rdmsr_unsafe(const struct exception_table_entry *fixup,
+ struct pt_regs *regs)
{
if (pr_warn_once("unchecked MSR access error: RDMSR from 0x%x at rIP: 0x%lx (%pS)\n",
(unsigned int)regs->cx, regs->ip, (void *)regs->ip))
@@ -101,14 +75,11 @@ __visible bool ex_handler_rdmsr_unsafe(const struct exception_table_entry *fixup
/* Pretend that the read succeeded and returned 0. */
regs->ax = 0;
regs->dx = 0;
- return ex_handler_default(fixup, regs, trapnr, error_code, fault_addr);
+ return ex_handler_default(fixup, regs);
}
-EXPORT_SYMBOL(ex_handler_rdmsr_unsafe);
-__visible bool ex_handler_wrmsr_unsafe(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_wrmsr_unsafe(const struct exception_table_entry *fixup,
+ struct pt_regs *regs)
{
if (pr_warn_once("unchecked MSR access error: WRMSR to 0x%x (tried to write 0x%08x%08x) at rIP: 0x%lx (%pS)\n",
(unsigned int)regs->cx, (unsigned int)regs->dx,
@@ -116,44 +87,29 @@ __visible bool ex_handler_wrmsr_unsafe(const struct exception_table_entry *fixup
show_stack_regs(regs);
/* Pretend that the write succeeded. */
- return ex_handler_default(fixup, regs, trapnr, error_code, fault_addr);
+ return ex_handler_default(fixup, regs);
}
-EXPORT_SYMBOL(ex_handler_wrmsr_unsafe);
-__visible bool ex_handler_clear_fs(const struct exception_table_entry *fixup,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code,
- unsigned long fault_addr)
+static bool ex_handler_clear_fs(const struct exception_table_entry *fixup,
+ struct pt_regs *regs)
{
if (static_cpu_has(X86_BUG_NULL_SEG))
asm volatile ("mov %0, %%fs" : : "rm" (__USER_DS));
asm volatile ("mov %0, %%fs" : : "rm" (0));
- return ex_handler_default(fixup, regs, trapnr, error_code, fault_addr);
+ return ex_handler_default(fixup, regs);
}
-EXPORT_SYMBOL(ex_handler_clear_fs);
-enum handler_type ex_get_fault_handler_type(unsigned long ip)
+int ex_get_fixup_type(unsigned long ip)
{
- const struct exception_table_entry *e;
- ex_handler_t handler;
+ const struct exception_table_entry *e = search_exception_tables(ip);
- e = search_exception_tables(ip);
- if (!e)
- return EX_HANDLER_NONE;
- handler = ex_fixup_handler(e);
- if (handler == ex_handler_fault)
- return EX_HANDLER_FAULT;
- else if (handler == ex_handler_uaccess || handler == ex_handler_copy)
- return EX_HANDLER_UACCESS;
- else
- return EX_HANDLER_OTHER;
+ return e ? e->type : EX_TYPE_NONE;
}
int fixup_exception(struct pt_regs *regs, int trapnr, unsigned long error_code,
unsigned long fault_addr)
{
const struct exception_table_entry *e;
- ex_handler_t handler;
#ifdef CONFIG_PNPBIOS
if (unlikely(SEGMENT_IS_PNP_CODE(regs->cs))) {
@@ -173,8 +129,33 @@ int fixup_exception(struct pt_regs *regs, int trapnr, unsigned long error_code,
if (!e)
return 0;
- handler = ex_fixup_handler(e);
- return handler(e, regs, trapnr, error_code, fault_addr);
+ switch (e->type) {
+ case EX_TYPE_DEFAULT:
+ return ex_handler_default(e, regs);
+ case EX_TYPE_FAULT:
+ return ex_handler_fault(e, regs, trapnr);
+ case EX_TYPE_UACCESS:
+ return ex_handler_uaccess(e, regs, trapnr);
+ case EX_TYPE_COPY:
+ return ex_handler_copy(e, regs, trapnr);
+ case EX_TYPE_CLEAR_FS:
+ return ex_handler_clear_fs(e, regs);
+ case EX_TYPE_FPU_RESTORE:
+ return ex_handler_fprestore(e, regs);
+ case EX_TYPE_RDMSR:
+ return ex_handler_rdmsr_unsafe(e, regs);
+ case EX_TYPE_WRMSR:
+ return ex_handler_wrmsr_unsafe(e, regs);
+ case EX_TYPE_BPF:
+ return ex_handler_bpf(e, regs);
+ case EX_TYPE_RDMSR_IN_MCE:
+ ex_handler_msr_mce(regs, false);
+ break;
+ case EX_TYPE_WRMSR_IN_MCE:
+ ex_handler_msr_mce(regs, true);
+ break;
+ }
+ BUG();
}
extern unsigned int early_recursion_flag;
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index 0fe6aacef3db..703dc6eaf4c7 100644
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -827,9 +827,7 @@ static int emit_atomic(u8 **pprog, u8 atomic_op,
return 0;
}
-static bool ex_handler_bpf(const struct exception_table_entry *x,
- struct pt_regs *regs, int trapnr,
- unsigned long error_code, unsigned long fault_addr)
+bool ex_handler_bpf(const struct exception_table_entry *x, struct pt_regs *regs)
{
u32 reg = x->fixup >> 8;
@@ -1313,12 +1311,7 @@ st: if (is_imm8(insn->off))
}
ex->insn = delta;
- delta = (u8 *)ex_handler_bpf - (u8 *)&ex->handler;
- if (!is_simm32(delta)) {
- pr_err("extable->handler doesn't fit into 32-bit\n");
- return -EFAULT;
- }
- ex->handler = delta;
+ ex->type = EX_TYPE_BPF;
if (dst_reg > BPF_REG_9) {
pr_err("verifier error\n");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 04:37:27 +0100