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90 lines
2.3 KiB
90 lines
2.3 KiB
From d9431a66b312084644186f16ba9ca2f9f21b64dd Mon Sep 17 00:00:00 2001 |
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From: Peter Jones <pjones@redhat.com> |
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Date: Tue, 12 Jul 2016 11:59:39 -0400 |
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Subject: [PATCH 210/237] Coverity rightly noticed that |
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grub_ipv6_get_masksize() was broken. |
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This fixes it with a version that even seems to work. |
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Related: rhbz#1154226 |
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Signed-off-by: Peter Jones <pjones@redhat.com> |
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--- |
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grub-core/net/net.c | 27 ++++++++++++++++----------- |
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include/grub/net.h | 2 +- |
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2 files changed, 17 insertions(+), 12 deletions(-) |
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diff --git a/grub-core/net/net.c b/grub-core/net/net.c |
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index 19a81bc..36fc0d8 100644 |
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--- a/grub-core/net/net.c |
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+++ b/grub-core/net/net.c |
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@@ -970,29 +970,34 @@ grub_net_network_level_interface_register (struct grub_net_network_level_interfa |
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} |
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int |
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-grub_ipv6_get_masksize(grub_uint8_t *be_mask) |
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+grub_ipv6_get_masksize (grub_uint16_t be_mask[8]) |
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{ |
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grub_uint8_t *mask; |
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grub_uint16_t mask16[8]; |
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- unsigned int x; |
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- int ret = 0; |
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+ int x, y; |
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+ int ret = 128; |
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- grub_memcpy (mask16, be_mask, sizeof(mask16)); |
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+ grub_memcpy (mask16, be_mask, sizeof (mask16)); |
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for (x = 0; x < 8; x++) |
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mask16[x] = grub_be_to_cpu16 (mask16[x]); |
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mask = (grub_uint8_t *)mask16; |
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- for (x = 15; x > 0; x--) |
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+ for (x = 15; x >= 0; x--) |
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{ |
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grub_uint8_t octet = mask[x]; |
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- while (octet & 0x80) |
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+ if (!octet) |
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{ |
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- ret++; |
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- octet <<= 1; |
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+ ret -= 8; |
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+ continue; |
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+ } |
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+ for (y = 0; y < 8; y++) |
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+ { |
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+ if (octet & (1 << y)) |
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+ break; |
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+ else |
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+ ret--; |
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} |
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- if (ret) |
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- ret += 8 * (15 - x); |
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break; |
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} |
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@@ -1009,7 +1014,7 @@ grub_net_add_ipv6_local (struct grub_net_network_level_interface *inter, |
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return 0; |
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if (mask == -1) |
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- mask = grub_ipv6_get_masksize ((grub_uint8_t *)inter->address.ipv6); |
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+ mask = grub_ipv6_get_masksize ((grub_uint16_t *)inter->address.ipv6); |
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if (mask == -1) |
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return 0; |
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diff --git a/include/grub/net.h b/include/grub/net.h |
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index c7b8e2a..bd930f4 100644 |
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--- a/include/grub/net.h |
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+++ b/include/grub/net.h |
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@@ -500,7 +500,7 @@ grub_net_configure_by_dhcpv6_ack (const char *name, |
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int is_def, char **device, char **path); |
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int |
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-grub_ipv6_get_masksize(grub_uint8_t *mask); |
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+grub_ipv6_get_masksize(grub_uint16_t *mask); |
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grub_err_t |
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grub_net_add_ipv6_local (struct grub_net_network_level_interface *inf, |
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-- |
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2.9.3 |
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