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fix: bound nest counter in bsdkm vecreg save #10874

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fix: bound nest counter in bsdkm vecreg save #10874

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8 changes: 8 additions & 0 deletions bsdkm/x86_vecreg.c
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,10 @@ int wolfkmod_vecreg_save(int flags_unused)
td_tid, curthread->td_tid);
return (EINVAL);
}
if (fpu_states[PCPU_GET(cpuid)].nest == UINT_MAX) {
printf("error: wolfkmod_vecreg_save: nest overflow\n");
return (EINVAL);
Comment on lines +169 to +170
}
fpu_states[PCPU_GET(cpuid)].nest++;
Comment on lines +168 to 172
}
else {
Expand All @@ -184,6 +188,10 @@ int wolfkmod_vecreg_save(int flags_unused)
}

/* increment nest and save td_tid. */
if (fpu_states[PCPU_GET(cpuid)].nest == UINT_MAX) {
printf("error: wolfkmod_vecreg_save: nest overflow\n");
return (EINVAL);
}
fpu_states[PCPU_GET(cpuid)].nest++;
fpu_states[PCPU_GET(cpuid)].td_tid = curthread->td_tid;
}
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