lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sun, 17 Jul 2022 01:17:11 +0200 (CEST) From: Thomas Gleixner <tglx@...utronix.de> To: LKML <linux-kernel@...r.kernel.org> Cc: x86@...nel.org, Linus Torvalds <torvalds@...ux-foundation.org>, Tim Chen <tim.c.chen@...ux.intel.com>, Josh Poimboeuf <jpoimboe@...nel.org>, Andrew Cooper <Andrew.Cooper3@...rix.com>, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, Johannes Wikner <kwikner@...z.ch>, Alyssa Milburn <alyssa.milburn@...ux.intel.com>, Jann Horn <jannh@...gle.com>, "H.J. Lu" <hjl.tools@...il.com>, Joao Moreira <joao.moreira@...el.com>, Joseph Nuzman <joseph.nuzman@...el.com>, Steven Rostedt <rostedt@...dmis.org>, Juergen Gross <jgross@...e.com> Subject: [patch 01/38] x86/paravirt: Ensure proper alignment The entries in the .parainstr sections are 8 byte aligned and the corresponding C struct makes the array offset 16 bytes. Though the pushed entries are only using 12 bytes. .parainstr_end is therefore 4 bytes short. That works by chance because it's only used in a loop: for (p = start; p < end; p++) But this falls flat when calculating the number of elements: n = end - start That's obviously off by one. Ensure that the gap is filled and the last entry is occupying 16 bytes. Signed-off-by: Thomas Gleixner <tglx@...utronix.de> Cc: Juergen Gross <jgross@...e.com> --- arch/x86/include/asm/paravirt.h | 1 + arch/x86/include/asm/paravirt_types.h | 1 + 2 files changed, 2 insertions(+) --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -743,6 +743,7 @@ extern void default_banner(void); word 771b; \ .byte ptype; \ .byte 772b-771b; \ + _ASM_ALIGN; \ .popsection --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -294,6 +294,7 @@ extern struct paravirt_patch_template pv " .byte " type "\n" \ " .byte 772b-771b\n" \ " .short " clobber "\n" \ + _ASM_ALIGN "\n" \ ".popsection\n" /* Generate patchable code, with the default asm parameters. */
Powered by blists - more mailing lists