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Bug 796737 - net-libs/libslirp-4.6.0 breaks app-emulation/qemu-6.0.0 user mode DHCP server
Summary: net-libs/libslirp-4.6.0 breaks app-emulation/qemu-6.0.0 user mode DHCP server
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Stabilization (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Zac Medico
Depends on:
Blocks: CVE-2021-3592, CVE-2021-3593, CVE-2021-3594, CVE-2021-3595
  Show dependency tree
Reported: 2021-06-19 10:31 UTC by Chris Mayo
Modified: 2021-06-19 18:20 UTC (History)
1 user (show)

See Also:
Package list:
net-libs/libslirp-4.6.1 *
Runtime testing required: ---


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Description Chris Mayo 2021-06-19 10:31:38 UTC
No IP address is assigned to the guest network interface when starting qemu with the default -nic user and using DHCP in the guest.

Fixed by reverting to net-libs/libslirp-4.3.1-r1 (although this has multiple CVEs bug 796347).

Also appears to be fixed in libslirp-4.6.1:

Fix DHCP regression introduced in 4.6.0. !95
Comment 1 Larry the Git Cow gentoo-dev 2021-06-19 16:03:22 UTC
The bug has been closed via the following commit(s):

commit c12ee84df0feb4f2b0d21d8048abb4796d6c459c
Author:     Zac Medico <>
AuthorDate: 2021-06-19 16:01:34 +0000
Commit:     Zac Medico <>
CommitDate: 2021-06-19 16:03:06 +0000

    net-libs/libslirp: Bump to version 4.6.1
    Package-Manager: Portage-3.0.20, Repoman-3.0.3
    Signed-off-by: Zac Medico <>

 net-libs/libslirp/Manifest                                         | 2 +-
 net-libs/libslirp/{libslirp-4.6.0.ebuild => libslirp-4.6.1.ebuild} | 0
 2 files changed, 1 insertion(+), 1 deletion(-)
Comment 2 Sam James archtester gentoo-dev Security 2021-06-19 17:34:30 UTC
I suppose we need to stabilise it now given QEMU 6.0.0 is.
Comment 3 Zac Medico gentoo-dev 2021-06-19 18:20:06 UTC
Yeah, I went ahead and bumped it with stable keywords.