From: "tip-bot2 for Borislav Petkov" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Borislav Petkov <bp@suse.de>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: x86/core] perf/x86/intel/ds: Check return values of insn decoder functions
Date: Mon, 15 Mar 2021 15:47:47 -0000 [thread overview]
Message-ID: <161582326782.398.3184167624440051970.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20210304174237.31945-9-bp@alien8.de>
The following commit has been merged into the x86/core branch of tip:
Commit-ID: 8c98a605544cfdec21d32fcf8fc855dc439f608f
Gitweb: https://git.kernel.org/tip/8c98a605544cfdec21d32fcf8fc855dc439f608f
Author: Borislav Petkov <bp@suse.de>
AuthorDate: Fri, 06 Nov 2020 16:36:24 +01:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Mon, 15 Mar 2021 11:23:48 +01:00
perf/x86/intel/ds: Check return values of insn decoder functions
branch_type() doesn't need to call the full insn_decode() because it
doesn't need it in all cases thus leave the calls separate.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210304174237.31945-9-bp@alien8.de
---
arch/x86/events/intel/lbr.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c
index 21890da..9ecf502 100644
--- a/arch/x86/events/intel/lbr.c
+++ b/arch/x86/events/intel/lbr.c
@@ -1224,8 +1224,7 @@ static int branch_type(unsigned long from, unsigned long to, int abort)
is64 = kernel_ip((unsigned long)addr) || any_64bit_mode(current_pt_regs());
#endif
insn_init(&insn, addr, bytes_read, is64);
- insn_get_opcode(&insn);
- if (!insn.opcode.got)
+ if (insn_get_opcode(&insn))
return X86_BR_ABORT;
switch (insn.opcode.bytes[0]) {
@@ -1262,8 +1261,7 @@ static int branch_type(unsigned long from, unsigned long to, int abort)
ret = X86_BR_INT;
break;
case 0xe8: /* call near rel */
- insn_get_immediate(&insn);
- if (insn.immediate1.value == 0) {
+ if (insn_get_immediate(&insn) || insn.immediate1.value == 0) {
/* zero length call */
ret = X86_BR_ZERO_CALL;
break;
@@ -1279,7 +1277,9 @@ static int branch_type(unsigned long from, unsigned long to, int abort)
ret = X86_BR_JMP;
break;
case 0xff: /* call near absolute, call far absolute ind */
- insn_get_modrm(&insn);
+ if (insn_get_modrm(&insn))
+ return X86_BR_ABORT;
+
ext = (insn.modrm.bytes[0] >> 3) & 0x7;
switch (ext) {
case 2: /* near ind call */
next prev parent reply other threads:[~2021-03-15 15:49 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 17:42 [PATCH v3 00/21] x86/insn: Add an insn_decode() API Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 01/21] x86/insn: Rename insn_decode() to insn_decode_from_regs() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 02/21] x86/insn: Add @buf_len param to insn_init() kernel-doc comment Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 03/21] x86/insn: Add a __ignore_sync_check__ marker Borislav Petkov
2021-03-12 3:07 ` Masami Hiramatsu
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 04/21] x86/insn: Add an insn_decode() API Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-15 16:53 ` Peter Zijlstra
2021-03-17 1:14 ` [PATCH v3 04/21] " Ian Rogers
2021-03-24 13:43 ` Arnaldo Carvalho de Melo
2021-03-24 13:54 ` Borislav Petkov
2021-03-24 18:21 ` Ian Rogers
2021-03-24 18:52 ` Arnaldo Carvalho de Melo
2021-03-04 17:42 ` [PATCH v3 05/21] x86/insn-eval: Handle return values from the decoder Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 06/21] x86/boot/compressed/sev-es: Convert to insn_decode() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 07/21] perf/x86/intel/ds: Check insn_get_length() retval Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 08/21] perf/x86/intel/ds: Check return values of insn decoder functions Borislav Petkov
2021-03-15 15:47 ` tip-bot2 for Borislav Petkov [this message]
2021-03-04 17:42 ` [PATCH v3 09/21] x86/alternative: Use insn_decode() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 10/21] x86/mce: Convert to insn_decode() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 11/21] x86/kprobes: " Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 12/21] x86/sev-es: Split vc_decode_insn() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 13/21] x86/sev-es: Convert to insn_decode() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 14/21] x86/traps: " Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 15/21] x86/uprobes: " Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 16/21] x86/tools/insn_decoder_test: " Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 17/21] tools/objtool: " Borislav Petkov
2021-03-04 17:49 ` Peter Zijlstra
2021-03-04 18:06 ` Borislav Petkov
2021-03-05 8:55 ` Peter Zijlstra
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 18/21] x86/tools/insn_sanity: " Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 19/21] tools/perf: " Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 20/21] x86/insn: Remove kernel_insn_init() Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
2021-03-04 17:42 ` [PATCH v3 21/21] x86/insn: Make insn_complete() static Borislav Petkov
2021-03-15 15:47 ` [tip: x86/core] " tip-bot2 for Borislav Petkov
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