[PATCH] OpenSSH: fix login on i?86

[PATCH] OpenSSH: fix login on i?86

[Arne Fitzenreiter]

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glibc calls clock_nanosleep_time64 syscall even if it not defined in
the headers for this arch and the seccomp filter kills the process
with because an unknown syscall.

Signed-off-by: Arne Fitzenreiter <arne_f(a)ipfire.org>
---
 lfs/openssh                                         |  1 +
 ...SH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch

diff --git a/lfs/openssh b/lfs/openssh
index 68a7d63cd..2f3eda74f 100644
--- a/lfs/openssh
+++ b/lfs/openssh
@@ -71,6 +71,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 	@$(PREBUILD)
 	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE)
 	cd $(DIR_APP) && sed -i "s/lkrb5 -ldes/lkrb5/" configure
+	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
 	cd $(DIR_APP) && ./configure \
 		--prefix=/usr \
 		--sysconfdir=/etc/ssh \
diff --git a/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch b/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
new file mode 100644
index 000000000..5199872d9
--- /dev/null
+++ b/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
@@ -0,0 +1,13 @@
+diff -Naur openssh-8.2p1.org/sandbox-seccomp-filter.c openssh-8.2p1/sandbox-seccomp-filter.c
+--- openssh-8.2p1.org/sandbox-seccomp-filter.c	2020-04-10 18:14:56.152309584 +0200
++++ openssh-8.2p1/sandbox-seccomp-filter.c	2020-04-10 21:05:45.827921765 +0200
+@@ -253,6 +253,9 @@
+ #endif
+ #ifdef __NR_clock_nanosleep_time64
+ 	SC_ALLOW(__NR_clock_nanosleep_time64),
++#else
++	/* on i586 glibc call syscall 407 which is not defined */
++	SC_ALLOW(407),
+ #endif
+ #ifdef __NR_clock_gettime64
+ 	SC_ALLOW(__NR_clock_gettime64),
-- 
2.17.1

Re: [PATCH] OpenSSH: fix login on i?86

[Michael Tremer]

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Hi Arne,

interesting solution, but I am okay with it for the time being.

Hopefully upstream will fix this in the next release.

Best,
-Michael

> On 10 Apr 2020, at 20:46, Arne Fitzenreiter <arne_f(a)ipfire.org> wrote:
> 
> glibc calls clock_nanosleep_time64 syscall even if it not defined in
> the headers for this arch and the seccomp filter kills the process
> with because an unknown syscall.
> 
> Signed-off-by: Arne Fitzenreiter <arne_f(a)ipfire.org>
> ---
> lfs/openssh                                         |  1 +
> ...SH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch | 13 +++++++++++++
> 2 files changed, 14 insertions(+)
> create mode 100644 src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
> 
> diff --git a/lfs/openssh b/lfs/openssh
> index 68a7d63cd..2f3eda74f 100644
> --- a/lfs/openssh
> +++ b/lfs/openssh
> @@ -71,6 +71,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
> 	@$(PREBUILD)
> 	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE)
> 	cd $(DIR_APP) && sed -i "s/lkrb5 -ldes/lkrb5/" configure
> +	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
> 	cd $(DIR_APP) && ./configure \
> 		--prefix=/usr \
> 		--sysconfdir=/etc/ssh \
> diff --git a/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch b/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
> new file mode 100644
> index 000000000..5199872d9
> --- /dev/null
> +++ b/src/patches/OpenSSH-8.2p1_glibc-2.31_clock_nanosleep_time64.patch
> @@ -0,0 +1,13 @@
> +diff -Naur openssh-8.2p1.org/sandbox-seccomp-filter.c openssh-8.2p1/sandbox-seccomp-filter.c
> +--- openssh-8.2p1.org/sandbox-seccomp-filter.c	2020-04-10 18:14:56.152309584 +0200
> ++++ openssh-8.2p1/sandbox-seccomp-filter.c	2020-04-10 21:05:45.827921765 +0200
> +@@ -253,6 +253,9 @@
> + #endif
> + #ifdef __NR_clock_nanosleep_time64
> + 	SC_ALLOW(__NR_clock_nanosleep_time64),
> ++#else
> ++	/* on i586 glibc call syscall 407 which is not defined */
> ++	SC_ALLOW(407),
> + #endif
> + #ifdef __NR_clock_gettime64
> + 	SC_ALLOW(__NR_clock_gettime64),
> -- 
> 2.17.1
>