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Re: Vulnerability in uClibc-ng
by Waldemar Brodkorb 14 Mar '22

14 Mar '22

Hello Andrea, Nozomi Networks Labs Advisory wrote, > Hello, > > we are trying to contact you in order to handle and resolve a vulnerability > that we found, that is affecting all versions of uClibc-ng, and that we > submitted to ICS-CERT. > > Can you confirm that you received an email asking you to participate to the > related VINCE (CERT/CC Vulnerability Information and Coordination > Environment) vulnerability case? Yes. > In case you would like to switch to encrypted GPG communications, you may > find our key attached to this email. No, best thing is to discuss the vulnerability here on the mailing list. Unfortunately I wasn't able to fix the issue by myself and hope someone from the rather small community will step up. So sent all dirty details to this list. best regards Waldemar

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[PATCH] xtensa: fix variable reference in TLS_LD
by Max Filippov 10 Mar '22

10 Mar '22

Use @DTPOFF instead of @TPOFF in TLS_LD as specified by the xtensa ABI. DTPOFF produces variable offset relative to the variable's module TLS block, it's the linker's job to replace it with TPOFF and adjust surrounding code when the object file is linked into an executable. This fixes tests tls/tst-tls[123] on xtensa that fail if built as PIE. Signed-off-by: Max Filippov <jcmvbkbc(a)gmail.com> --- test/tls/tls-macros-xtensa.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/test/tls/tls-macros-xtensa.h b/test/tls/tls-macros-xtensa.h index 179dc5e57ce5..90fc726f6f6b 100644 --- a/test/tls/tls-macros-xtensa.h +++ b/test/tls/tls-macros-xtensa.h @@ -15,7 +15,7 @@ __asm__ ("movi a8, _TLS_MODULE_BASE_@TLSFUNC\n\t" \ "movi a10, _TLS_MODULE_BASE_@TLSARG\n\t" \ "callx8.tls a8, _TLS_MODULE_BASE_@TLSCALL\n\t" \ - "movi %0, " #x "@TPOFF\n\t" \ + "movi %0, " #x "@DTPOFF\n\t" \ "add %0, %0, a10\n\t" \ : "=r" (__l) \ : \ @@ -38,7 +38,7 @@ __asm__ ("movi a0, _TLS_MODULE_BASE_@TLSFUNC\n\t" \ "movi a2, _TLS_MODULE_BASE_@TLSARG\n\t" \ "callx0.tls a0, _TLS_MODULE_BASE_@TLSCALL\n\t" \ - "movi %0, " #x "@TPOFF\n\t" \ + "movi %0, " #x "@DTPOFF\n\t" \ "add %0, %0, a2\n\t" \ : "=r" (__l) \ : \ -- 2.30.2

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test from webinterface
by mail＠waldemar-brodkorb.de 10 Mar '22

10 Mar '22

test from webinterface

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(fwd) [PATCH] Enable build for RISC-V 32-bit target [ustcymgu@gmail.com]
by Waldemar Brodkorb 10 Mar '22

10 Mar '22

----- Forwarded message from Yimin Gu <ustcymgu(a)gmail.com> ----- Date: Thu, 10 Mar 2022 19:57:03 +0800 From: Yimin Gu <ustcymgu(a)gmail.com> To: devel(a)uclibc-ng.org Cc: wbx(a)uclibc-ng.org Subject: [PATCH] Enable build for RISC-V 32-bit target RISC-V 32-bit No-MMU is not officially supported by Linux kernel, but the current 64-bit toolchain can be built for 32-bit targets without substantial code change, thus it's nice to let uclibc compile for rv32 targets. I also managed to get uclibc/busybox running on rv32 QEMU and FPGA softcore without noticable problem based on this: https://github.com/damien-lemoal/buildroot. Note that to compile successfully, these macros need to be added in the arch/riscv/include/uapi/asm/unistd.h kernel header file: #define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_SET_GET_RLIMIT #define __ARCH_WANT_TIME32_SYSCALLS Signed-off-by: Yimin Gu <ustcymgu(a)gmail.com> --- libc/sysdeps/linux/riscv64/bits/wordsize.h | 3 ++- libc/sysdeps/linux/riscv64/sys/asm.h | 6 +++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/libc/sysdeps/linux/riscv64/bits/wordsize.h b/libc/sysdeps/linux/riscv64/bits/wordsize.h index 67a16ba62..1fc649aad 100644 --- a/libc/sysdeps/linux/riscv64/bits/wordsize.h +++ b/libc/sysdeps/linux/riscv64/bits/wordsize.h @@ -25,5 +25,6 @@ #if __riscv_xlen == 64 # define __WORDSIZE_TIME64_COMPAT32 1 #else -# error "rv32i-based targets are not supported" +# define __WORDSIZE_TIME64_COMPAT32 1 +// # warning "rv32i-based targets are experimental" #endif diff --git a/libc/sysdeps/linux/riscv64/sys/asm.h b/libc/sysdeps/linux/riscv64/sys/asm.h index ddb84b683..3d0f7afbc 100644 --- a/libc/sysdeps/linux/riscv64/sys/asm.h +++ b/libc/sysdeps/linux/riscv64/sys/asm.h @@ -26,7 +26,11 @@ # define REG_S sd # define REG_L ld #elif __riscv_xlen == 32 -# error "rv32i-based targets are not supported" +# warning "rv32i-based targets are experimental" +# define PTRLOG 2 +# define SZREG 4 +# define REG_S sw +# define REG_L lw #else # error __riscv_xlen must equal 32 or 64 #endif -- 2.35.1 ----- End forwarded message -----

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tst-cancel18 failing
by Max Filippov 10 Mar '22

10 Mar '22

Hello, I've noticed that with the uclibc-ng 1.0.39 the tests tst-cancel18 and tst-cancelx18 are failing in NPTL-enabled configs (on xtensa). Bisection pointed me to the commit 08d46f1ce21e ("librt: avoid compilation error") which effectively turned off cancellation for clock_nanosleep. Reverting it fixes the tests for me, and does not break uclibc-ng build on nommu configs with or without threads support. So I'm curious what was the original issue that mentioned commit tried to solve (what arch/config)? -- Thanks. -- Max

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uclibc-ng 1.0.40 - prlimit issues
by Lance Fredrickson 07 Feb '22

07 Feb '22

I'm having an issue with the new 'prlimit' additions to 1.0.40. One of my targets runs an older kernel that predates the prlimit64 syscall. I sent in patch that guards around that code, though it would still be defined in headers and probably still cause me issues. My other target uses kernel 2.6.36.4, which should include the syscall, but I get an error the same as this github issue. https://github.com/util-linux/util-linux/commit/01e94325e676f36b364032a6f5a… Also, when I try to compile sample program that target: #include <sys/types.h> #include <sys/time.h> #include <sys/resource.h> #include <stddef.h> int main () { int ret; ret = prlimit(0, RLIMIT_AS, NULL, NULL); if (ret != 0) { return 1; }; return 0; } I get error prlimit.c:10:11: warning: implicit declaration of function ‘prlimit’; did you mean ‘setrlimit’? [-Wimplicit-function-declaration] 10 | ret = prlimit(0, RLIMIT_AS, NULL, NULL); | ^~~~~~~ | setrlimit on unpatched uclibc-ng like symbols still aren't being visible. thanks, Lance Fredrickson

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[PATCH] guard new syscall prlimit
by lancethepants 03 Feb '22

03 Feb '22

This patch guards the newly added syscall wrapper prlimit for kernels that predate this feature. Lance Fredrickson --- libc/sysdeps/linux/common/prlimit.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libc/sysdeps/linux/common/prlimit.c b/libc/sysdeps/linux/common/prlimit.c index cdb64ba0d..dbb0de0d3 100644 --- a/libc/sysdeps/linux/common/prlimit.c +++ b/libc/sysdeps/linux/common/prlimit.c @@ -18,6 +18,7 @@ #include <sys/resource.h> #include <sysdep.h> +#ifdef __NR_prlimit int prlimit (__pid_t pid, enum __rlimit_resource resource, const struct rlimit *new_rlimit, struct rlimit *old_rlimit) @@ -25,3 +26,4 @@ prlimit (__pid_t pid, enum __rlimit_resource resource, return INLINE_SYSCALL (prlimit64, 4, pid, resource, new_rlimit, old_rlimit); } +#endif -- 2.20.1

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VU#473698 RE: Vulnerability in uClibc-ng and also uClibc
by Timur David Snoke 02 Feb '22

02 Feb '22

Greetings, We have received a report that indicates that one of your products contains a vulnerability. In the interest of coordinated disclosure (which aims to address vulnerabilities before they can be exploited by attackers), we would like to communicate this information to you. To view the details associated with this case, please visit https://kb.cert.org/vince/ and create an account on VINCE, which is our coordination platform. Within VINCE, it is possible to view the original vulnerability report. VINCE also facilitates direct communication with the reporter, pending the reporter's willingness to communicate about the case. If you need to reply to this email, please do not alter the VU# in the subject line to ensure that your message is routed properly on our end. Regards, Vulnerability Analysis Team ====================================================================== CERT Coordination Center kb.cert.org / cert(a)cert.org ====================================================================== -----Original Message----- From: Waldemar Brodkorb <wbx(a)uclibc-ng.org> Sent: Tuesday, February 1, 2022 1:21 PM To: Timur David Snoke <tdsnoke(a)cert.org> Cc: 'devel(a)uclibc-ng.org' <devel(a)uclibc-ng.org> Subject: Re: [uclibc-ng-devel] Vulnerability in uClibc-ng and also uClibc Hi Timur, Timur David Snoke wrote, > Greetings, > > > > We have a reported vulnerability in both this library and the > unmaintained one, how can we communicate this to the developers? > > > > Regards, sent an email to the list. best regards Waldemar

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Vulnerability in uClibc-ng and also uClibc
by Timur David Snoke 01 Feb '22

01 Feb '22

Greetings, We have a reported vulnerability in both this library and the unmaintained one, how can we communicate this to the developers? Regards, Vulnerability Analysis Team ====================================================================== CERT Coordination Center kb.cert.org / cert(a)cert.org<mailto:cert@cert.org> ======================================================================

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[PATCH v2 1/1] sched.h: Add SCHED_DEADLINE
by Petr Vorel 28 Jan '22

28 Jan '22

Defined in kernel v3.14, commit aab03e05e8f7 ("sched/deadline: Add SCHED_DEADLINE structures & implementation") Signed-off-by: Petr Vorel <petr.vorel(a)gmail.com> --- Changes v1->v2: * fix patch title libc/sysdeps/linux/common/bits/sched.h | 1 + 1 file changed, 1 insertion(+) diff --git a/libc/sysdeps/linux/common/bits/sched.h b/libc/sysdeps/linux/common/bits/sched.h index 9d05314f5..18a9fb98d 100644 --- a/libc/sysdeps/linux/common/bits/sched.h +++ b/libc/sysdeps/linux/common/bits/sched.h @@ -31,6 +31,7 @@ #ifdef __USE_GNU # define SCHED_BATCH 3 # define SCHED_IDLE 5 +# define SCHED_DEADLINE 6 # define SCHED_RESET_ON_FORK 0x40000000 #endif -- 2.34.1

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