| 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
| ||
|
Message-ID: <20060914143433.B30207@unix-os.sc.intel.com> Date: Thu, 14 Sep 2006 14:34:34 -0700 From: Keshavamurthy Anil S <anil.s.keshavamurthy@...el.com> To: Linux IA64 <linux-ia64@...r.kernel.org> Cc: Linux Kernel <linux-kernel@...r.kernel.org>, Systemtap <systemtap@...rces.redhat.com> Subject: [PATCH] Kprobes - fixup the pagefault exception caused by probehandlers If the user-specified kprobe handler causes the page fault when accessing user space address, fixup this fault since do_page_fault() should not continue as the kprobe handler are run with preemption disabled. Please apply. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com> --- arch/ia64/kernel/kprobes.c | 6 ++++++ 1 file changed, 6 insertions(+) Index: 2.6.18-rc6-git2/arch/ia64/kernel/kprobes.c =================================================================== --- 2.6.18-rc6-git2.orig/arch/ia64/kernel/kprobes.c +++ 2.6.18-rc6-git2/arch/ia64/kernel/kprobes.c @@ -768,6 +768,12 @@ static int __kprobes kprobes_fault_handl */ if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr)) return 1; + /* + * In case the user-specified fault handler returned + * zero, try to fix up. + */ + if (ia64_done_with_exception(regs)) + return 1; /* * In case the user-specified fault handler returned - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists