From: Ben Hutchings <ben@decadent.org.uk>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: akpm@linux-foundation.org,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@kernel.org>,
"kbuild test robot" <fengguang.wu@intel.com>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
Subject: [PATCH 3.2 60/79] x86/decoder: Add new TEST instruction pattern
Date: Sun, 11 Feb 2018 04:20:06 +0000 [thread overview]
Message-ID: <lsq.1518322806.89839826@decadent.org.uk> (raw)
In-Reply-To: <lsq.1518322802.943358572@decadent.org.uk>
3.2.99-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Masami Hiramatsu <mhiramat@kernel.org>
commit 12a78d43de767eaf8fb272facb7a7b6f2dc6a9df upstream.
The kbuild test robot reported this build warning:
Warning: arch/x86/tools/test_get_len found difference at <jump_table>:ffffffff8103dd2c
Warning: ffffffff8103dd82: f6 09 d8 testb $0xd8,(%rcx)
Warning: objdump says 3 bytes, but insn_get_length() says 2
Warning: decoded and checked 1569014 instructions with 1 warnings
This sequence seems to be a new instruction not in the opcode map in the Intel SDM.
The instruction sequence is "F6 09 d8", means Group3(F6), MOD(00)REG(001)RM(001), and 0xd8.
Intel SDM vol2 A.4 Table A-6 said the table index in the group is "Encoding of Bits 5,4,3 of
the ModR/M Byte (bits 2,1,0 in parenthesis)"
In that table, opcodes listed by the index REG bits as:
000 001 010 011 100 101 110 111
TEST Ib/Iz,(undefined),NOT,NEG,MUL AL/rAX,IMUL AL/rAX,DIV AL/rAX,IDIV AL/rAX
So, it seems TEST Ib is assigned to 001.
Add the new pattern.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
arch/x86/lib/x86-opcode-map.txt | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/lib/x86-opcode-map.txt
+++ b/arch/x86/lib/x86-opcode-map.txt
@@ -759,7 +759,7 @@ EndTable
GrpTable: Grp3_1
0: TEST Eb,Ib
-1:
+1: TEST Eb,Ib
2: NOT Eb
3: NEG Eb
4: MUL AL,Eb
next prev parent reply other threads:[~2018-02-11 4:33 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-11 4:20 [PATCH 3.2 00/79] 3.2.99-rc1 review Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 09/79] scsi: bfa: integer overflow in debugfs Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 31/79] USB: usbfs: compute urb->actual_length for isochronous Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 59/79] ALSA: hda: Add Raven PCI ID Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 22/79] media: omap_vout: Fix a possible null pointer dereference in omap_vout_open() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 48/79] nfs: Fix ugly referral attributes Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 33/79] rt2x00usb: mark device removed when get ENOENT usb error Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 39/79] ocfs2: should wait dio before inode lock in ocfs2_setattr() Ben Hutchings
2018-02-11 7:39 ` alex chen
2018-02-11 18:01 ` Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 23/79] mtd: nand: Fix writing mtdoops to nand flash Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 52/79] autofs: fix careless error in recent commit Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 38/79] ocfs2: fix issue that ocfs2_setattr() does not deal with new_i_size==i_size Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 44/79] dm: discard support requires all targets in a table support discards Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 29/79] x86/smp: Don't ever patch back to UP if we unplug cpus Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 50/79] autofs4: catatonic_mode vs. notify_daemon race Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 02/79] rtc: interface: ignore expired timers when enqueuing new timers Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 27/79] eCryptfs: use after free in ecryptfs_release_messaging() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 05/79] USB: serial: garmin_gps: fix I/O after failed probe and remove Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 54/79] ALSA: timer: Remove kernel warning at compat ioctl error paths Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 12/79] fs/9p: Compare qid.path in v9fs_test_inode Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 46/79] KVM: vmx: Inject #GP on invalid PAT CR Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 19/79] l2tp: initialise l2tp_eth sessions before registering them Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 10/79] IB/srp: Avoid that a cable pull can trigger a kernel crash Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 16/79] l2tp: push all ppp pseudowire shutdown through .release handler Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 01/79] Input: adxl34x - do not treat FIFO_MODE() as boolean Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 13/79] net/9p: Switch to wait_event_killable() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 28/79] media: Don't do DMA on stack for firmware upload in the AS102 driver Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 32/79] video: udlfb: Fix read EDID timeout Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 76/79] usbip: fix stub_send_ret_submit() vulnerability to null transfer_buffer Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 07/79] media: rc: check for integer overflow Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 26/79] coda: fix 'kernel memory exposure attempt' in fsync Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 41/79] sctp: Fixup v4mapped behaviour to comply with Sock API Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 49/79] autofs4: autofs4_wait() vs. autofs4_catatonic_mode() race Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 25/79] USB: Add delay-init quirk for Corsair K70 LUX keyboards Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 35/79] blktrace: Fix potential deadlock between delete & sysfs ops Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 17/79] l2tp: ensure sessions are freed after their PPPOL2TP socket Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 71/79] usbip: Fix sscanf handling Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 74/79] usbip: fix stub_rx: harden CMD_SUBMIT path to handle malicious input Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 78/79] kaiser: Set _PAGE_NX only if supported Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 73/79] usbip: fix stub_rx: get_pipe() to validate endpoint number Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 42/79] sctp: fully initialize the IPv6 address in sctp_v6_to_addr() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 47/79] KVM: SVM: obey guest PAT Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 55/79] ALSA: usb-audio: Add sanity checks to FE parser Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 11/79] tpm-dev-common: Reject too short writes Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 65/79] netfilter: xt_TCPMSS: correct return value in tcpmss_mangle_packet Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 72/79] usb: add helper to extract bits 12:11 of wMaxPacketSize Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 77/79] [media] cx231xx: Fix the max number of interfaces Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 64/79] netfilter: xt_TCPMSS: fix handling of malformed TCP header and options Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 34/79] dm: fix race between dm_get_from_kobject() and __dm_destroy() Ben Hutchings
2018-02-11 4:20 ` Ben Hutchings [this message]
2018-02-11 4:20 ` [PATCH 3.2 20/79] l2tp: protect sock pointer of struct pppol2tp_session with RCU Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 06/79] USB: serial: garmin_gps: fix memory leak on probe errors Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 62/79] netfilter: xt_TCPOPTSTRIP: don't use tcp_hdr() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 51/79] autofs: don't fail mount for transient error Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 45/79] dm bufio: fix integer overflow when limiting maximum cache size Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 21/79] l2tp: initialise PPP sessions before registering them Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 43/79] net/sctp: Always set scope_id in sctp_inet6_skb_msgname Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 14/79] l2tp: add session reorder queue purge function to core Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 69/79] ALSA: seq: Make ioctls race-free Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 04/79] PCI/AER: Report non-fatal errors only to the affected endpoint Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 40/79] s390/disassembler: increase show_code buffer size Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 75/79] usbip: prevent vhci_hcd driver from leaking a socket pointer address Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 30/79] kprobes, x86/alternatives: Use text_mutex to protect smp_alt_modules Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 37/79] IB/mlx4: Increase maximal message size under UD QP Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 58/79] ALSA: usb-audio: Add sanity checks in v2 clock parsers Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 53/79] nilfs2: fix race condition that causes file system corruption Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 61/79] netfilter: xt_TCPOPTSTRIP: fix possible mangling beyond packet boundary Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 56/79] ALSA: usb-audio: Fix potential out-of-bound access at parsing SU Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 24/79] isofs: fix timestamps beyond 2027 Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 63/79] netfilter: xt_TCPMSS: Fix missing fragmentation handling Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 03/79] rtc: set the alarm to the next expiring timer Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 18/79] l2tp: don't register sessions in l2tp_session_create() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 79/79] kaiser: Set _PAGE_NX only if supported Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 67/79] RDS: Heap OOB write in rds_message_alloc_sgs() Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 57/79] ALSA: usb-audio: Fix potential zero-division at parsing FU Ben Hutchings
2018-02-12 6:59 ` Takashi Iwai
2018-02-13 18:28 ` Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 36/79] blktrace: fix unlocked access to init/start-stop/teardown Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 70/79] staging: usbip: removed #if 0'd out code Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 08/79] KVM: nVMX: set IDTR and GDTR limits when loading L1 host state Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 66/79] netfilter: xt_TCPMSS: add more sanity tests on tcph->doff Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 68/79] RDS: null pointer dereference in rds_atomic_free_op Ben Hutchings
2018-02-11 4:20 ` [PATCH 3.2 15/79] l2tp: purge session reorder queue on delete Ben Hutchings
2018-02-11 11:18 ` [PATCH 3.2 00/79] 3.2.99-rc1 review Guenter Roeck
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