diff options
| author | Daniel Verkamp <daniel@drv.nu> | 2024-03-11 17:56:40 -0700 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2024-03-12 10:27:40 -0400 |
| commit | 3722c21de19ba64de56495502c0c025b913a9b15 (patch) | |
| tree | ff22edad57ae0fb1546dcd535e07338f6aa9cde1 | |
| parent | 5d87ff2542c1116e07ae74ba84197a0013e08db1 (diff) | |
| download | seabios-3722c21de19ba64de56495502c0c025b913a9b15.tar.gz | |
vgasrc: round up save/restore size
When calculating the size of the buffer required for the VGA/VBE state,
round up rather than truncating when dividing the number of bytes to get
the number of 64-byte blocks. Without this modification, the save state
function will write past the end of a buffer of the size requested.
Signed-off-by: Daniel Verkamp <daniel@drv.nu>
| -rw-r--r-- | vgasrc/vbe.c | 2 | ||||
| -rw-r--r-- | vgasrc/vgabios.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/vgasrc/vbe.c b/vgasrc/vbe.c index 91abc9ab..20437dba 100644 --- a/vgasrc/vbe.c +++ b/vgasrc/vbe.c @@ -244,7 +244,7 @@ vbe_104f04(struct bregs *regs) if (ret < 0) goto fail; if (cmd == 0) - regs->bx = ret / 64; + regs->bx = DIV_ROUND_UP(ret, 64); regs->ax = 0x004f; return; fail: diff --git a/vgasrc/vgabios.c b/vgasrc/vgabios.c index 198ee555..73ba1c3d 100644 --- a/vgasrc/vgabios.c +++ b/vgasrc/vgabios.c @@ -1081,7 +1081,7 @@ handle_101c(struct bregs *regs) if (ret < 0) goto fail; if (cmd == 0) - regs->bx = ret / 64; + regs->bx = DIV_ROUND_UP(ret, 64); regs->al = 0x1c; fail: return; |