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| author | Joseph J Allen <eerykitty@gmail.com> | 2021-01-03 01:34:35 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-11 23:35:07 +1100 |
| commit | caccf2ac5c5d085cd35043027b3eb93c4ffead07 (patch) | |
| tree | 5772eea0140cd7a795717f1216ce70d4758d56a7 /arch/powerpc/kernel | |
| parent | 2377c92e37fe97bc5b365f55cf60f56dfc4849f5 (diff) | |
| download | linux-stable-caccf2ac5c5d085cd35043027b3eb93c4ffead07.tar.gz linux-stable-caccf2ac5c5d085cd35043027b3eb93c4ffead07.tar.bz2 linux-stable-caccf2ac5c5d085cd35043027b3eb93c4ffead07.zip | |
powerpc: use kernel endianness in MSR in 32-bit signal handler
This mirrors the behavior in handle_rt_signal32, to obey kernel endianness
rather than assume a 32-bit process is big-endian. Without this change,
any 32-bit little-endian process will SIGILL immediately upon handling a
signal.
Signed-off-by: Joseph J Allen <eerykitty@gmail.com>
Signed-off-by: Will Springer <skirmisher@protonmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2058876.irdbgypaU6@sheen
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 934cbdf6dd10..75ee918a120a 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -929,8 +929,9 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset, regs->gpr[3] = ksig->sig; regs->gpr[4] = (unsigned long) sc; regs->nip = (unsigned long)ksig->ka.sa.sa_handler; - /* enter the signal handler in big-endian mode */ + /* enter the signal handler in native-endian mode */ regs->msr &= ~MSR_LE; + regs->msr |= (MSR_KERNEL & MSR_LE); return 0; failed: |