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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2017-11-10 16:12:32 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-11-21 09:34:52 +0100 |
| commit | 7b659ee3e1fe0e8eb39730afb903c64e25490ec4 (patch) | |
| tree | 9649c9e18c9ac1726b29f2ae4f9c0f4b9446763c /tools | |
| parent | 91c49c2deb96ffc3c461eaae70219d89224076b7 (diff) | |
| download | linux-7b659ee3e1fe0e8eb39730afb903c64e25490ec4.tar.gz linux-7b659ee3e1fe0e8eb39730afb903c64e25490ec4.tar.bz2 linux-7b659ee3e1fe0e8eb39730afb903c64e25490ec4.zip | |
x86/pkeys/selftests: Fix protection keys write() warning
write() is marked as having a must-check return value. Check it and
abort if we fail to write an error message from a signal handler.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171111001232.94813E58@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/x86/pkey-helpers.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/testing/selftests/x86/pkey-helpers.h b/tools/testing/selftests/x86/pkey-helpers.h index 3818f25391c2..b3cb7670e026 100644 --- a/tools/testing/selftests/x86/pkey-helpers.h +++ b/tools/testing/selftests/x86/pkey-helpers.h @@ -30,6 +30,7 @@ static inline void sigsafe_printf(const char *format, ...) if (!dprint_in_signal) { vprintf(format, ap); } else { + int ret; int len = vsnprintf(dprint_in_signal_buffer, DPRINT_IN_SIGNAL_BUF_SIZE, format, ap); @@ -39,7 +40,9 @@ static inline void sigsafe_printf(const char *format, ...) */ if (len > DPRINT_IN_SIGNAL_BUF_SIZE) len = DPRINT_IN_SIGNAL_BUF_SIZE; - write(1, dprint_in_signal_buffer, len); + ret = write(1, dprint_in_signal_buffer, len); + if (ret < 0) + abort(); } va_end(ap); } |