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parisc architecture fix for kernel v6.15-rc5:

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Fix a double SIGFPE crash.
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Merge tag 'parisc-for-6.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc fix from Helge Deller:
 "Fix a double SIGFPE crash"

* tag 'parisc-for-6.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix double SIGFPE crash
This commit is contained in:
Linus Torvalds 2025-05-04 08:47:18 -07:00
commit 593bde4ca9
1 changed files with 13 additions and 3 deletions
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12
arch/parisc/math-emu/driver.c
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@ -97,7 +97,17 @@ handle_fpe(struct pt_regs *regs)
memcpy(regs->fr, frcopy, sizeof regs->fr); memcpy(regs->fr, frcopy, sizeof regs->fr);
if (signalcode != 0) { if (signalcode != 0) {
force_sig_fault(signalcode >> 24, signalcode & 0xffffff, int sig = signalcode >> 24;
if (sig == SIGFPE) {
/*
* Clear floating point trap bit to avoid trapping
* again on the first floating-point instruction in
* the userspace signal handler.
*/
regs->fr[0] &= ~(1ULL << 38);
}
force_sig_fault(sig, signalcode & 0xffffff,
(void __user *) regs->iaoq[0]); (void __user *) regs->iaoq[0]);
return -1; return -1;
} }