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fix: initialize kernel_buf arr into .bss (instead of stack) #4

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Merged
estoniec merged 3 commits into from
Apr 15, 2026
Merged

fix: initialize kernel_buf arr into .bss (instead of stack) #4

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f4a4150
fix: fixed logic error in generate next byte
estoniec Mar 31, 2026
8668b4b
fix: initialize kernel_buf arr into .bss (instead of stack)
estoniec Apr 15, 2026
46e4996
cosmetic: use clang-format to driver.c
estoniec Apr 15, 2026
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2 changes: 1 addition & 1 deletion assets/expected1.bin
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Original file line number Diff line number Diff line change
@@ -1 +1 @@
Gkwy`½?ɲ
GŽ­åú ŽŸ‚:
6 changes: 3 additions & 3 deletions driver.c
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Expand Up @@ -110,9 +110,9 @@ static int gprn_init_t(struct gf256_gprn* gprn)

static ssize_t misc_read(struct file* filp, char __user* buf, size_t length, loff_t* f_pos)
{
GF256_t kernel_buf[1024];
size_t bytes_to_read = length;
size_t chunk;
static GF256_t kernel_buf[1024];
size_t bytes_to_read = length;
size_t chunk;

if (!global_gprn)
return -ENODEV;
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11 changes: 4 additions & 7 deletions prandom.c
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Expand Up @@ -54,16 +54,13 @@ GF256_t gf256_gprn_next(struct gf256_gprn* gprn)

for (i = 0; i < POLY_DEGREE; i++)
{
if (gprn->t[i] != 0)
{
idx = (gprn->index + i) % POLY_DEGREE;
new_byte = GF256_Add(new_byte, GF256_Mul(gprn->t[i], gprn->coeff[idx]));
}
idx = (gprn->index + i) % POLY_DEGREE;
new_byte = GF256_Add(new_byte, GF256_Mul(gprn->coeff[i], gprn->t[idx]));
}

// "circular" array
gprn->coeff[gprn->index] = new_byte;
gprn->index = (gprn->index + 1) % POLY_DEGREE;
gprn->t[gprn->index] = new_byte;
gprn->index = (gprn->index + 1) % POLY_DEGREE;

return new_byte;
}
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