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Message-ID: <2024070944-fled-strum-88ab@gregkh>
Date: Tue, 9 Jul 2024 11:48:30 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org,
akpm@...ux-foundation.org,
torvalds@...ux-foundation.org,
stable@...r.kernel.org
Cc: lwn@....net,
jslaby@...e.cz,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Linux 6.6.38
diff --git a/Makefile b/Makefile
index 8a73b886156a..badff3368218 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 6
PATCHLEVEL = 6
-SUBLEVEL = 37
+SUBLEVEL = 38
EXTRAVERSION =
NAME = Hurr durr I'ma ninja sloth
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index ac8e4d9bf954..6a1c9fca5260 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -1982,21 +1982,28 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
/* If building the body of the JITed code fails somehow,
* we fall back to the interpretation.
*/
- if (build_body(&ctx) < 0)
- goto out_free;
+ if (build_body(&ctx) < 0) {
+ image_ptr = NULL;
+ bpf_jit_binary_free(header);
+ prog = orig_prog;
+ goto out_imms;
+ }
build_epilogue(&ctx);
/* 3.) Extra pass to validate JITed Code */
- if (validate_code(&ctx))
- goto out_free;
+ if (validate_code(&ctx)) {
+ image_ptr = NULL;
+ bpf_jit_binary_free(header);
+ prog = orig_prog;
+ goto out_imms;
+ }
flush_icache_range((u32)header, (u32)(ctx.target + ctx.idx));
if (bpf_jit_enable > 1)
/* there are 2 passes here */
bpf_jit_dump(prog->len, image_size, 2, ctx.target);
- if (bpf_jit_binary_lock_ro(header))
- goto out_free;
+ bpf_jit_binary_lock_ro(header);
prog->bpf_func = (void *)ctx.target;
prog->jited = 1;
prog->jited_len = image_size;
@@ -2013,11 +2020,5 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
bpf_jit_prog_release_other(prog, prog == orig_prog ?
tmp : orig_prog);
return prog;
-
-out_free:
- image_ptr = NULL;
- bpf_jit_binary_free(header);
- prog = orig_prog;
- goto out_imms;
}
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
index 13cd480385ca..9eb7753d117d 100644
--- a/arch/loongarch/net/bpf_jit.c
+++ b/arch/loongarch/net/bpf_jit.c
@@ -1206,19 +1206,16 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
flush_icache_range((unsigned long)header, (unsigned long)(ctx.image + ctx.idx));
if (!prog->is_func || extra_pass) {
- int err;
-
if (extra_pass && ctx.idx != jit_data->ctx.idx) {
pr_err_once("multi-func JIT bug %d != %d\n",
ctx.idx, jit_data->ctx.idx);
- goto out_free;
- }
- err = bpf_jit_binary_lock_ro(header);
- if (err) {
- pr_err_once("bpf_jit_binary_lock_ro() returned %d\n",
- err);
- goto out_free;
+ bpf_jit_binary_free(header);
+ prog->bpf_func = NULL;
+ prog->jited = 0;
+ prog->jited_len = 0;
+ goto out_offset;
}
+ bpf_jit_binary_lock_ro(header);
} else {
jit_data->ctx = ctx;
jit_data->image = image_ptr;
@@ -1249,13 +1246,6 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
out_offset = -1;
return prog;
-
-out_free:
- bpf_jit_binary_free(header);
- prog->bpf_func = NULL;
- prog->jited = 0;
- prog->jited_len = 0;
- goto out_offset;
}
/* Indicate the JIT backend supports mixing bpf2bpf and tailcalls. */
diff --git a/arch/mips/net/bpf_jit_comp.c b/arch/mips/net/bpf_jit_comp.c
index e355dfca4400..a40d926b6513 100644
--- a/arch/mips/net/bpf_jit_comp.c
+++ b/arch/mips/net/bpf_jit_comp.c
@@ -1012,8 +1012,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
bpf_prog_fill_jited_linfo(prog, &ctx.descriptors[1]);
/* Set as read-only exec and flush instruction cache */
- if (bpf_jit_binary_lock_ro(header))
- goto out_err;
+ bpf_jit_binary_lock_ro(header);
flush_icache_range((unsigned long)header,
(unsigned long)&ctx.target[ctx.jit_index]);
diff --git a/arch/parisc/net/bpf_jit_core.c b/arch/parisc/net/bpf_jit_core.c
index 979f45d4d1fb..d6ee2fd45550 100644
--- a/arch/parisc/net/bpf_jit_core.c
+++ b/arch/parisc/net/bpf_jit_core.c
@@ -167,13 +167,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
bpf_flush_icache(jit_data->header, ctx->insns + ctx->ninsns);
if (!prog->is_func || extra_pass) {
- if (bpf_jit_binary_lock_ro(jit_data->header)) {
- bpf_jit_binary_free(jit_data->header);
- prog->bpf_func = NULL;
- prog->jited = 0;
- prog->jited_len = 0;
- goto out_offset;
- }
+ bpf_jit_binary_lock_ro(jit_data->header);
prologue_len = ctx->epilogue_offset - ctx->body_len;
for (i = 0; i < prog->len; i++)
ctx->offset[i] += prologue_len;
diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h
index cdea5dccaefe..72b7bb34fade 100644
--- a/arch/powerpc/net/bpf_jit.h
+++ b/arch/powerpc/net/bpf_jit.h
@@ -36,6 +36,9 @@
EMIT(PPC_RAW_BRANCH(offset)); \
} while (0)
+/* bl (unconditional 'branch' with link) */
+#define PPC_BL(dest) EMIT(PPC_RAW_BL((dest) - (unsigned long)(image + ctx->idx)))
+
/* "cond" here covers BO:BI fields. */
#define PPC_BCC_SHORT(cond, dest) \
do { \
@@ -144,6 +147,12 @@ struct codegen_context {
#define BPF_FIXUP_LEN 2 /* Two instructions => 8 bytes */
#endif
+static inline void bpf_flush_icache(void *start, void *end)
+{
+ smp_wmb(); /* smp write barrier */
+ flush_icache_range((unsigned long)start, (unsigned long)end);
+}
+
static inline bool bpf_is_seen_register(struct codegen_context *ctx, int i)
{
return ctx->seen & (1 << (31 - i));
@@ -160,17 +169,16 @@ static inline void bpf_clear_seen_register(struct codegen_context *ctx, int i)
}
void bpf_jit_init_reg_mapping(struct codegen_context *ctx);
-int bpf_jit_emit_func_call_rel(u32 *image, u32 *fimage, struct codegen_context *ctx, u64 func);
-int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct codegen_context *ctx,
+int bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func);
+int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
u32 *addrs, int pass, bool extra_pass);
void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx);
void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx);
void bpf_jit_realloc_regs(struct codegen_context *ctx);
int bpf_jit_emit_exit_insn(u32 *image, struct codegen_context *ctx, int tmp_reg, long exit_addr);
-int bpf_add_extable_entry(struct bpf_prog *fp, u32 *image, u32 *fimage, int pass,
- struct codegen_context *ctx, int insn_idx,
- int jmp_off, int dst_reg);
+int bpf_add_extable_entry(struct bpf_prog *fp, u32 *image, int pass, struct codegen_context *ctx,
+ int insn_idx, int jmp_off, int dst_reg);
#endif
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index cee6a57b9d08..37043dfc1add 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -39,13 +39,10 @@ int bpf_jit_emit_exit_insn(u32 *image, struct codegen_context *ctx, int tmp_reg,
return 0;
}
-struct powerpc_jit_data {
- /* address of rw header */
- struct bpf_binary_header *hdr;
- /* address of ro final header */
- struct bpf_binary_header *fhdr;
+struct powerpc64_jit_data {
+ struct bpf_binary_header *header;
u32 *addrs;
- u8 *fimage;
+ u8 *image;
u32 proglen;
struct codegen_context ctx;
};
@@ -62,18 +59,15 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
u8 *image = NULL;
u32 *code_base;
u32 *addrs;
- struct powerpc_jit_data *jit_data;
+ struct powerpc64_jit_data *jit_data;
struct codegen_context cgctx;
int pass;
int flen;
- struct bpf_binary_header *fhdr = NULL;
- struct bpf_binary_header *hdr = NULL;
+ struct bpf_binary_header *bpf_hdr;
struct bpf_prog *org_fp = fp;
struct bpf_prog *tmp_fp;
bool bpf_blinded = false;
bool extra_pass = false;
- u8 *fimage = NULL;
- u32 *fcode_base;
u32 extable_len;
u32 fixup_len;
@@ -103,16 +97,9 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
addrs = jit_data->addrs;
if (addrs) {
cgctx = jit_data->ctx;
- /*
- * JIT compiled to a writable location (image/code_base) first.
- * It is then moved to the readonly final location (fimage/fcode_base)
- * using instruction patching.
- */
- fimage = jit_data->fimage;
- fhdr = jit_data->fhdr;
+ image = jit_data->image;
+ bpf_hdr = jit_data->header;
proglen = jit_data->proglen;
- hdr = jit_data->hdr;
- image = (void *)hdr + ((void *)fimage - (void *)fhdr);
extra_pass = true;
/* During extra pass, ensure index is reset before repopulating extable entries */
cgctx.exentry_idx = 0;
@@ -132,7 +119,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
cgctx.stack_size = round_up(fp->aux->stack_depth, 16);
/* Scouting faux-generate pass 0 */
- if (bpf_jit_build_body(fp, NULL, NULL, &cgctx, addrs, 0, false)) {
+ if (bpf_jit_build_body(fp, 0, &cgctx, addrs, 0, false)) {
/* We hit something illegal or unsupported. */
fp = org_fp;
goto out_addrs;
@@ -147,7 +134,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
*/
if (cgctx.seen & SEEN_TAILCALL || !is_offset_in_branch_range((long)cgctx.idx * 4)) {
cgctx.idx = 0;
- if (bpf_jit_build_body(fp, NULL, NULL, &cgctx, addrs, 0, false)) {
+ if (bpf_jit_build_body(fp, 0, &cgctx, addrs, 0, false)) {
fp = org_fp;
goto out_addrs;
}
@@ -169,19 +156,17 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
proglen = cgctx.idx * 4;
alloclen = proglen + FUNCTION_DESCR_SIZE + fixup_len + extable_len;
- fhdr = bpf_jit_binary_pack_alloc(alloclen, &fimage, 4, &hdr, &image,
- bpf_jit_fill_ill_insns);
- if (!fhdr) {
+ bpf_hdr = bpf_jit_binary_alloc(alloclen, &image, 4, bpf_jit_fill_ill_insns);
+ if (!bpf_hdr) {
fp = org_fp;
goto out_addrs;
}
if (extable_len)
- fp->aux->extable = (void *)fimage + FUNCTION_DESCR_SIZE + proglen + fixup_len;
+ fp->aux->extable = (void *)image + FUNCTION_DESCR_SIZE + proglen + fixup_len;
skip_init_ctx:
code_base = (u32 *)(image + FUNCTION_DESCR_SIZE);
- fcode_base = (u32 *)(fimage + FUNCTION_DESCR_SIZE);
/* Code generation passes 1-2 */
for (pass = 1; pass < 3; pass++) {
@@ -189,10 +174,8 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
cgctx.idx = 0;
cgctx.alt_exit_addr = 0;
bpf_jit_build_prologue(code_base, &cgctx);
- if (bpf_jit_build_body(fp, code_base, fcode_base, &cgctx, addrs, pass,
- extra_pass)) {
- bpf_arch_text_copy(&fhdr->size, &hdr->size, sizeof(hdr->size));
- bpf_jit_binary_pack_free(fhdr, hdr);
+ if (bpf_jit_build_body(fp, code_base, &cgctx, addrs, pass, extra_pass)) {
+ bpf_jit_binary_free(bpf_hdr);
fp = org_fp;
goto out_addrs;
}
@@ -212,19 +195,17 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
#ifdef CONFIG_PPC64_ELF_ABI_V1
/* Function descriptor nastiness: Address + TOC */
- ((u64 *)image)[0] = (u64)fcode_base;
+ ((u64 *)image)[0] = (u64)code_base;
((u64 *)image)[1] = local_paca->kernel_toc;
#endif
- fp->bpf_func = (void *)fimage;
+ fp->bpf_func = (void *)image;
fp->jited = 1;
fp->jited_len = proglen + FUNCTION_DESCR_SIZE;
+ bpf_flush_icache(bpf_hdr, (u8 *)bpf_hdr + bpf_hdr->size);
if (!fp->is_func || extra_pass) {
- if (bpf_jit_binary_pack_finalize(fp, fhdr, hdr)) {
- fp = org_fp;
- goto out_addrs;
- }
+ bpf_jit_binary_lock_ro(bpf_hdr);
bpf_prog_fill_jited_linfo(fp, addrs);
out_addrs:
kfree(addrs);
@@ -234,9 +215,8 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
jit_data->addrs = addrs;
jit_data->ctx = cgctx;
jit_data->proglen = proglen;
- jit_data->fimage = fimage;
- jit_data->fhdr = fhdr;
- jit_data->hdr = hdr;
+ jit_data->image = image;
+ jit_data->header = bpf_hdr;
}
out:
@@ -250,13 +230,12 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
* The caller should check for (BPF_MODE(code) == BPF_PROBE_MEM) before calling
* this function, as this only applies to BPF_PROBE_MEM, for now.
*/
-int bpf_add_extable_entry(struct bpf_prog *fp, u32 *image, u32 *fimage, int pass,
- struct codegen_context *ctx, int insn_idx, int jmp_off,
- int dst_reg)
+int bpf_add_extable_entry(struct bpf_prog *fp, u32 *image, int pass, struct codegen_context *ctx,
+ int insn_idx, int jmp_off, int dst_reg)
{
off_t offset;
unsigned long pc;
- struct exception_table_entry *ex, *ex_entry;
+ struct exception_table_entry *ex;
u32 *fixup;
/* Populate extable entries only in the last pass */
@@ -267,16 +246,9 @@ int bpf_add_extable_entry(struct bpf_prog *fp, u32 *image, u32 *fimage, int pass
WARN_ON_ONCE(ctx->exentry_idx >= fp->aux->num_exentries))
return -EINVAL;
- /*
- * Program is first written to image before copying to the
- * final location (fimage). Accordingly, update in the image first.
- * As all offsets used are relative, copying as is to the
- * final location should be alright.
- */
pc = (unsigned long)&image[insn_idx];
- ex = (void *)fp->aux->extable - (void *)fimage + (void *)image;
- fixup = (void *)ex -
+ fixup = (void *)fp->aux->extable -
(fp->aux->num_exentries * BPF_FIXUP_LEN * 4) +
(ctx->exentry_idx * BPF_FIXUP_LEN * 4);
@@ -287,42 +259,18 @@ int bpf_add_extable_entry(struct bpf_prog *fp, u32 *image, u32 *fimage, int pass
fixup[BPF_FIXUP_LEN - 1] =
PPC_RAW_BRANCH((long)(pc + jmp_off) - (long)&fixup[BPF_FIXUP_LEN - 1]);
- ex_entry = &ex[ctx->exentry_idx];
+ ex = &fp->aux->extable[ctx->exentry_idx];
- offset = pc - (long)&ex_entry->insn;
+ offset = pc - (long)&ex->insn;
if (WARN_ON_ONCE(offset >= 0 || offset < INT_MIN))
return -ERANGE;
- ex_entry->insn = offset;
+ ex->insn = offset;
- offset = (long)fixup - (long)&ex_entry->fixup;
+ offset = (long)fixup - (long)&ex->fixup;
if (WARN_ON_ONCE(offset >= 0 || offset < INT_MIN))
return -ERANGE;
- ex_entry->fixup = offset;
+ ex->fixup = offset;
ctx->exentry_idx++;
return 0;
}
-
-void bpf_jit_free(struct bpf_prog *fp)
-{
- if (fp->jited) {
- struct powerpc_jit_data *jit_data = fp->aux->jit_data;
- struct bpf_binary_header *hdr;
-
- /*
- * If we fail the final pass of JIT (from jit_subprogs),
- * the program may not be finalized yet. Call finalize here
- * before freeing it.
- */
- if (jit_data) {
- bpf_jit_binary_pack_finalize(fp, jit_data->fhdr, jit_data->hdr);
- kvfree(jit_data->addrs);
- kfree(jit_data);
- }
- hdr = bpf_jit_binary_pack_hdr(fp);
- bpf_jit_binary_pack_free(hdr, NULL);
- WARN_ON_ONCE(!bpf_prog_kallsyms_verify_off(fp));
- }
-
- bpf_prog_unlock_free(fp);
-}
diff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c
index dd61aa4325d9..06f886850a93 100644
--- a/arch/powerpc/net/bpf_jit_comp32.c
+++ b/arch/powerpc/net/bpf_jit_comp32.c
@@ -200,13 +200,12 @@ void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx)
EMIT(PPC_RAW_BLR());
}
-/* Relative offset needs to be calculated based on final image location */
-int bpf_jit_emit_func_call_rel(u32 *image, u32 *fimage, struct codegen_context *ctx, u64 func)
+int bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func)
{
- s32 rel = (s32)func - (s32)(fimage + ctx->idx);
+ s32 rel = (s32)func - (s32)(image + ctx->idx);
if (image && rel < 0x2000000 && rel >= -0x2000000) {
- EMIT(PPC_RAW_BL(rel));
+ PPC_BL(func);
} else {
/* Load function address into r0 */
EMIT(PPC_RAW_LIS(_R0, IMM_H(func)));
@@ -279,7 +278,7 @@ static int bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32 o
}
/* Assemble the body code between the prologue & epilogue */
-int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct codegen_context *ctx,
+int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
u32 *addrs, int pass, bool extra_pass)
{
const struct bpf_insn *insn = fp->insnsi;
@@ -1010,7 +1009,7 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code
jmp_off += 4;
}
- ret = bpf_add_extable_entry(fp, image, fimage, pass, ctx, insn_idx,
+ ret = bpf_add_extable_entry(fp, image, pass, ctx, insn_idx,
jmp_off, dst_reg);
if (ret)
return ret;
@@ -1066,7 +1065,7 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code
EMIT(PPC_RAW_STW(bpf_to_ppc(BPF_REG_5), _R1, 12));
}
- ret = bpf_jit_emit_func_call_rel(image, fimage, ctx, func_addr);
+ ret = bpf_jit_emit_func_call_rel(image, ctx, func_addr);
if (ret)
return ret;
diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index 884eef1b3973..2239ce5e8501 100644
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -240,7 +240,7 @@ static int bpf_jit_emit_func_call_hlp(u32 *image, struct codegen_context *ctx, u
return 0;
}
-int bpf_jit_emit_func_call_rel(u32 *image, u32 *fimage, struct codegen_context *ctx, u64 func)
+int bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func)
{
unsigned int i, ctx_idx = ctx->idx;
@@ -361,7 +361,7 @@ asm (
);
/* Assemble the body code between the prologue & epilogue */
-int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct codegen_context *ctx,
+int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
u32 *addrs, int pass, bool extra_pass)
{
enum stf_barrier_type stf_barrier = stf_barrier_type_get();
@@ -952,8 +952,8 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code
addrs[++i] = ctx->idx * 4;
if (BPF_MODE(code) == BPF_PROBE_MEM) {
- ret = bpf_add_extable_entry(fp, image, fimage, pass, ctx,
- ctx->idx - 1, 4, dst_reg);
+ ret = bpf_add_extable_entry(fp, image, pass, ctx, ctx->idx - 1,
+ 4, dst_reg);
if (ret)
return ret;
}
@@ -1007,7 +1007,7 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code
if (func_addr_fixed)
ret = bpf_jit_emit_func_call_hlp(image, ctx, func_addr);
else
- ret = bpf_jit_emit_func_call_rel(image, fimage, ctx, func_addr);
+ ret = bpf_jit_emit_func_call_rel(image, ctx, func_addr);
if (ret)
return ret;
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 05746e22fe79..62ee557d4b49 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -1973,11 +1973,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
print_fn_code(jit.prg_buf, jit.size_prg);
}
if (!fp->is_func || extra_pass) {
- if (bpf_jit_binary_lock_ro(header)) {
- bpf_jit_binary_free(header);
- fp = orig_fp;
- goto free_addrs;
- }
+ bpf_jit_binary_lock_ro(header);
} else {
jit_data->header = header;
jit_data->ctx = jit;
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
index 73bf0aea8baf..fa0759bfe498 100644
--- a/arch/sparc/net/bpf_jit_comp_64.c
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -1602,11 +1602,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
bpf_flush_icache(header, (u8 *)header + header->size);
if (!prog->is_func || extra_pass) {
- if (bpf_jit_binary_lock_ro(header)) {
- bpf_jit_binary_free(header);
- prog = orig_prog;
- goto out_off;
- }
+ bpf_jit_binary_lock_ro(header);
} else {
jit_data->ctx = ctx;
jit_data->image = image_ptr;
diff --git a/arch/x86/net/bpf_jit_comp32.c b/arch/x86/net/bpf_jit_comp32.c
index f2fc8c38629b..429a89c5468b 100644
--- a/arch/x86/net/bpf_jit_comp32.c
+++ b/arch/x86/net/bpf_jit_comp32.c
@@ -2600,7 +2600,8 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
if (bpf_jit_enable > 1)
bpf_jit_dump(prog->len, proglen, pass + 1, image);
- if (image && !bpf_jit_binary_lock_ro(header)) {
+ if (image) {
+ bpf_jit_binary_lock_ro(header);
prog->bpf_func = (void *)image;
prog->jited = 1;
prog->jited_len = proglen;
diff --git a/include/linux/filter.h b/include/linux/filter.h
index a74d97114a54..5090e940ba3e 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -842,22 +842,20 @@ bpf_ctx_narrow_access_offset(u32 off, u32 size, u32 size_default)
#define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0]))
-static inline int __must_check bpf_prog_lock_ro(struct bpf_prog *fp)
+static inline void bpf_prog_lock_ro(struct bpf_prog *fp)
{
#ifndef CONFIG_BPF_JIT_ALWAYS_ON
if (!fp->jited) {
set_vm_flush_reset_perms(fp);
- return set_memory_ro((unsigned long)fp, fp->pages);
+ set_memory_ro((unsigned long)fp, fp->pages);
}
#endif
- return 0;
}
-static inline int __must_check
-bpf_jit_binary_lock_ro(struct bpf_binary_header *hdr)
+static inline void bpf_jit_binary_lock_ro(struct bpf_binary_header *hdr)
{
set_vm_flush_reset_perms(hdr);
- return set_memory_rox((unsigned long)hdr, hdr->size >> PAGE_SHIFT);
+ set_memory_rox((unsigned long)hdr, hdr->size >> PAGE_SHIFT);
}
int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap);
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 77a9b12e00af..4124805ad7ba 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -2375,9 +2375,7 @@ struct bpf_prog *bpf_prog_select_runtime(struct bpf_prog *fp, int *err)
}
finalize:
- *err = bpf_prog_lock_ro(fp);
- if (*err)
- return fp;
+ bpf_prog_lock_ro(fp);
/* The tail call compatibility check can only be done at
* this late stage as we need to determine, if we deal
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index aa546355918c..171045b6956d 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -18625,13 +18625,9 @@ static int jit_subprogs(struct bpf_verifier_env *env)
* bpf_prog_load will add the kallsyms for the main program.
*/
for (i = 1; i < env->subprog_cnt; i++) {
- err = bpf_prog_lock_ro(func[i]);
- if (err)
- goto out_free;
- }
-
- for (i = 1; i < env->subprog_cnt; i++)
+ bpf_prog_lock_ro(func[i]);
bpf_prog_kallsyms_add(func[i]);
+ }
/* Last step: make now unused interpreter insns from main
* prog consistent for later dump requests, so they can
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