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SUSE:SLE-15-SP5:Update
qemu-linux-user.26284
0130-hw-net-net_tx_pkt-fix-assertion-fai.patch
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File 0130-hw-net-net_tx_pkt-fix-assertion-fai.patch of Package qemu-linux-user.26284
From: Mauro Matteo Cascella <mcascell@redhat.com> Date: Sat, 1 Aug 2020 18:42:38 +0200 Subject: hw/net/net_tx_pkt: fix assertion failure in net_tx_pkt_add_raw_fragment() Git-commit: 035e69b063835a5fd23cacabd63690a3d84532a8 References: bsc#1174641, CVE-2020-16092 An assertion failure issue was found in the code that processes network packets while adding data fragments into the packet context. It could be abused by a malicious guest to abort the QEMU process on the host. This patch replaces the affected assert() with a conditional statement, returning false if the current data fragment exceeds max_raw_frags. Reported-by: Alexander Bulekov <alxndr@bu.edu> Reported-by: Ziming Zhang <ezrakiez@gmail.com> Reviewed-by: Dmitry Fleytman <dmitry.fleytman@gmail.com> Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Bruce Rogers <brogers@suse.com> --- hw/net/net_tx_pkt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c index 162f802dd77e09b89c0cb65583e8..54d4c3bbd02dccc33ee3c7e710b4 100644 --- a/hw/net/net_tx_pkt.c +++ b/hw/net/net_tx_pkt.c @@ -379,7 +379,10 @@ bool net_tx_pkt_add_raw_fragment(struct NetTxPkt *pkt, hwaddr pa, hwaddr mapped_len = 0; struct iovec *ventry; assert(pkt); - assert(pkt->max_raw_frags > pkt->raw_frags); + + if (pkt->raw_frags >= pkt->max_raw_frags) { + return false; + } if (!len) { return true;
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