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: Wed, 8 Jul 2020 10:03:28 +0000 From: 彭浩(Richard) <richard.peng@...o.com> To: Will Deacon <will@...nel.org> CC: "catalin.marinas@....com" <catalin.marinas@....com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "ardb@...nel.org" <ardb@...nel.org> Subject: Re: [PATCH] arm64/module-plts: Consider the special case where plt_max_entries is 0 On Tue, Jul 07, 2020 at 07:46:08AM -0400, Peng Hao wrote: >> If plt_max_entries is 0, a warning is triggered. >> WARNING: CPU: 200 PID: 3000 at arch/arm64/kernel/module-plts.c:97 module_emit_plt_entry+0xa4/0x150 > > Which kernel are you seeing this with? There is a PLT-related change in > for-next/core, and I'd like to rule if out if possible. > 5.6.0-rc3+ >> Signed-off-by: Peng Hao <richard.peng@...o.com> >> --- >> arch/arm64/kernel/module-plts.c | 3 ++- >> 1 file changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/arch/arm64/kernel/module-plts.c b/arch/arm64/kernel/module-plts.c >> index 65b08a74aec6..1868c9ac13f2 100644 >> --- a/arch/arm64/kernel/module-plts.c >> +++ b/arch/arm64/kernel/module-plts.c >> @@ -79,7 +79,8 @@ u64 module_emit_plt_entry(struct module *mod, Elf64_Shdr *sechdrs, >> int i = pltsec->plt_num_entries; >> int j = i - 1; >> u64 val = sym->st_value + rela->r_addend; >> - >> + if (pltsec->plt_max_entries == 0) >> + return 0; > >Hmm, but if there aren't any PLTs then how do we end up here? > We also returned 0 when warning was triggered. >Will
Powered by blists - more mailing lists