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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 04:17:39 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 04:17:39 +0000 |
| commit | a51ea39b76ddbe91aa5ccf9f24762ef7c8b0d0cd (patch) | |
| tree | 13f5692a56e72fd7da499f399ec0f91e68905c40 /arch/m68k/kernel | |
| parent | Adding debian version 4.19.282-1. (diff) | |
| download | linux-a51ea39b76ddbe91aa5ccf9f24762ef7c8b0d0cd.tar.xz linux-a51ea39b76ddbe91aa5ccf9f24762ef7c8b0d0cd.zip | |
Merging upstream version 4.19.289.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/m68k/kernel')
| -rw-r--r-- | arch/m68k/kernel/signal.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index c67a68b6b..d08c771b5 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -882,11 +882,17 @@ static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs * } static inline void __user * -get_sigframe(struct ksignal *ksig, size_t frame_size) +get_sigframe(struct ksignal *ksig, struct pt_regs *tregs, size_t frame_size) { unsigned long usp = sigsp(rdusp(), ksig); + unsigned long gap = 0; - return (void __user *)((usp - frame_size) & -8UL); + if (CPU_IS_020_OR_030 && tregs->format == 0xb) { + /* USP is unreliable so use worst-case value */ + gap = 256; + } + + return (void __user *)((usp - gap - frame_size) & -8UL); } static int setup_frame(struct ksignal *ksig, sigset_t *set, @@ -904,7 +910,7 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set, return -EFAULT; } - frame = get_sigframe(ksig, sizeof(*frame) + fsize); + frame = get_sigframe(ksig, tregs, sizeof(*frame) + fsize); if (fsize) err |= copy_to_user (frame + 1, regs + 1, fsize); @@ -975,7 +981,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, return -EFAULT; } - frame = get_sigframe(ksig, sizeof(*frame)); + frame = get_sigframe(ksig, tregs, sizeof(*frame)); if (fsize) err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize); |