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| author | Brian Gerst <brgerst@gmail.com> | 2020-11-30 17:30:59 -0500 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-12-28 11:58:59 +0100 |
| commit | 2ca408d9c749c32288bc28725f9f12ba30299e8f (patch) | |
| tree | ed7eff796318b8a87b1c88ca7e490529626df089 /arch | |
| parent | 5c8fe583cce542aa0b84adc939ce85293de36e5e (diff) | |
| download | linux-stable-2ca408d9c749c32288bc28725f9f12ba30299e8f.tar.gz linux-stable-2ca408d9c749c32288bc28725f9f12ba30299e8f.tar.bz2 linux-stable-2ca408d9c749c32288bc28725f9f12ba30299e8f.zip | |
fanotify: Fix sys_fanotify_mark() on native x86-32
Commit
121b32a58a3a ("x86/entry/32: Use IA32-specific wrappers for syscalls taking 64-bit arguments")
converted native x86-32 which take 64-bit arguments to use the
compat handlers to allow conversion to passing args via pt_regs.
sys_fanotify_mark() was however missed, as it has a general compat
handler. Add a config option that will use the syscall wrapper that
takes the split args for native 32-bit.
[ bp: Fix typo in Kconfig help text. ]
Fixes: 121b32a58a3a ("x86/entry/32: Use IA32-specific wrappers for syscalls taking 64-bit arguments")
Reported-by: Paweł Jasiak <pawel@jasiak.xyz>
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Jan Kara <jack@suse.cz>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20201130223059.101286-1-brgerst@gmail.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Kconfig | 6 | ||||
| -rw-r--r-- | arch/x86/Kconfig | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 78c6f05b10f9..24862d15f3a3 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1105,6 +1105,12 @@ config HAVE_ARCH_PFN_VALID config ARCH_SUPPORTS_DEBUG_PAGEALLOC bool +config ARCH_SPLIT_ARG64 + bool + help + If a 32-bit architecture requires 64-bit arguments to be split into + pairs of 32-bit arguments, select this option. + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7b6dd10b162a..21f851179ff0 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -19,6 +19,7 @@ config X86_32 select KMAP_LOCAL select MODULES_USE_ELF_REL select OLD_SIGACTION + select ARCH_SPLIT_ARG64 config X86_64 def_bool y |