41 lines
2.4 KiB
Diff
41 lines
2.4 KiB
Diff
From d182960ae974a0074010a058d0d909846a2f3f79 Mon Sep 17 00:00:00 2001
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From: Patrik Flykt <patrik.flykt@linux.intel.com>
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Date: Fri, 29 Aug 2014 09:20:46 +0300
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Subject: [PATCH] test-dhcp6-client: Fix option length
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The whole DHCPv6 test message length was incorrectly used as the length
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of DHCPv6 options causing the following bad memory access:
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$ build/test-dhcp6-client
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Assertion 'interface_index >= -1' failed at ../src/libsystemd-network/sd-dhcp6-client.c:129, function sd_dhcp6_client_set_index(). Ignoring.
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=================================================================
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==29135==ERROR: AddressSanitizer: global-buffer-overflow on address 0x7fe204aa9148 at pc 0x7fe204a5958f bp 0x7fff3e47d470 sp 0x7fff3e47d460
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READ of size 1 at 0x7fe204aa9148 thread T0
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#0 0x7fe204a5958e in option_parse_hdr ../src/libsystemd-network/dhcp6-option.c:145
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#1 0x7fe204a59884 in dhcp6_option_parse ../src/libsystemd-network/dhcp6-option.c:165
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#2 0x7fe204a4eb9c in test_advertise_option ../src/libsystemd-network/test-dhcp6-client.c:227
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#3 0x7fe204a51c58 in main ../src/libsystemd-network/test-dhcp6-client.c:584
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#4 0x7fe2031590df in __libc_start_main (/lib64/libc.so.6+0x200df)
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#5 0x7fe204a4cc5b (/home/test/systemd/build/test-dhcp6-client+0x25c5b)
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0x7fe204aa9148 is located 2 bytes to the right of global variable 'msg_advertise' from '../src/libsystemd-network/test-dhcp6-client.c' (0x7fe204aa9080) of size 198
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0x7fe204aa9148 is located 56 bytes to the left of global variable 'msg_reply' from '../src/libsystemd-network/test-dhcp6-client.c' (0x7fe204aa9180) of size 173
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SUMMARY: AddressSanitizer: global-buffer-overflow ../src/libsystemd-network/dhcp6-option.c:145 option_parse_hdr
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---
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src/libsystemd-network/test-dhcp6-client.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/libsystemd-network/test-dhcp6-client.c b/src/libsystemd-network/test-dhcp6-client.c
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index 96c68e1feb..259db33bcd 100644
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--- a/src/libsystemd-network/test-dhcp6-client.c
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+++ b/src/libsystemd-network/test-dhcp6-client.c
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@@ -207,7 +207,7 @@ static int test_advertise_option(sd_event *e) {
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DHCP6Message *advertise = (DHCP6Message *)msg_advertise;
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uint8_t *optval, *opt = &msg_advertise[sizeof(DHCP6Message)];
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uint16_t optcode;
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- size_t optlen, len = sizeof(msg_advertise);
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+ size_t optlen, len = sizeof(msg_advertise) - sizeof(DHCP6Message);
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be32_t val;
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uint8_t preference = 255;
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struct in6_addr addr;
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