diff options
Diffstat (limited to 'system/easy-kernel/0202-parisc-disable-prctl.patch')
| -rw-r--r-- | system/easy-kernel/0202-parisc-disable-prctl.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/system/easy-kernel/0202-parisc-disable-prctl.patch b/system/easy-kernel/0202-parisc-disable-prctl.patch new file mode 100644 index 000000000..f892d6a19 --- /dev/null +++ b/system/easy-kernel/0202-parisc-disable-prctl.patch @@ -0,0 +1,51 @@ +From 339b41ec357c24c02ed4aed6267dbfd443ee1e8e Mon Sep 17 00:00:00 2001 +From: Helge Deller <deller@gmx.de> +Date: Mon, 13 Nov 2023 16:06:18 +0100 +Subject: prctl: Temporarily disable prctl(PR_SET_MDWE) on parisc + +systemd-254 tries to use prctl(PR_SET_MDWE) for systemd's +MemoryDenyWriteExecute functionality, but fails on PA-RISC/HPPA which +still needs executable stacks. + +Temporarily disable prctl(PR_SET_MDWE) by returning -ENODEV on parisc +for now. Note that we can't return -EINVAL since systemd will then try +to use seccomp instead. + +Reported-by: Sam James <sam@gentoo.org> +Signed-off-by: Helge Deller <deller@gmx.de> +Link: https://lore.kernel.org/all/875y2jro9a.fsf@gentoo.org/ +Link: https://github.com/systemd/systemd/issues/29775. +Cc: <stable@vger.kernel.org> # v6.3+ +--- + kernel/sys.c | 10 ++++++++-- + 1 file changed, 8 insertions(+), 2 deletions(-) + +diff --git a/kernel/sys.c b/kernel/sys.c +index 420d9cb9cc8e2..8e3eaf650d07d 100644 +--- a/kernel/sys.c ++++ b/kernel/sys.c +@@ -2700,10 +2700,16 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, + break; + #endif + case PR_SET_MDWE: +- error = prctl_set_mdwe(arg2, arg3, arg4, arg5); ++ if (IS_ENABLED(CONFIG_PARISC)) ++ error = -EINVAL; ++ else ++ error = prctl_set_mdwe(arg2, arg3, arg4, arg5); + break; + case PR_GET_MDWE: +- error = prctl_get_mdwe(arg2, arg3, arg4, arg5); ++ if (IS_ENABLED(CONFIG_PARISC)) ++ error = -EINVAL; ++ else ++ error = prctl_get_mdwe(arg2, arg3, arg4, arg5); + break; + case PR_SET_VMA: + error = prctl_set_vma(arg2, arg3, arg4, arg5); +-- +cgit +Filename: fallback-exec-stack.patch. Size: 2kb. View raw, copy, hex, or download this file. +View source code, the removal or expiry stories, or read the about page. + +This website does not claim ownership of, copyright on, and assumes no liability for provided content. Toggle color scheme. |