This bug was fixed in the package linux - 5.8.0-53.60
---------------
linux (5.8.0-53.60) groovy; urgency=medium
* CVE-2021-3491
- io_uring: fix provide_buffers sign extension
- io_uring: fix overflows checks in provide buffers
- SAUCE: proc: Avoid mixing integer types in mem_rw()
- SAUCE: io_uring: truncate lengths larger than MAX_RW_COUNT on provide
buffers
* CVE-2021-3490
- bpf: Fix a verifier failure with xor
- SAUCE: bpf: verifier: fix ALU32 bounds tracking with bitwise ops
* CVE-2021-3489
- SAUCE: bpf: ringbuf: deny reserve of buffers larger than ringbuf
- SAUCE: bpf: prevent writable memory-mapping of read-only ringbuf pages
-- Stefan Bader <[email protected]> Thu, 06 May 2021 07:43:20
+0200
** Changed in: linux (Ubuntu Groovy)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3489
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3490
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3491
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https://bugs.launchpad.net/bugs/1910323
Title:
Fix implicit declaration warnings for kselftests/memfd test on newer
releases
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-5.6 package in Ubuntu:
New
Status in linux source package in Focal:
Fix Released
Status in linux-oem-5.6 source package in Focal:
Fix Released
Status in linux source package in Groovy:
Fix Released
Status in linux source package in Hirsute:
Fix Released
Bug description:
[Impact]
While debugging bug 1910277, I found that the test compilation will
print some warnings:
memfd_test.c:64:7: warning: implicit declaration of function ‘open’;
memfd_test.c:90:6: warning: implicit declaration of function ‘fcntl’
memfd_test.c:397:6: warning: implicit declaration of function ‘fallocate’;
fuse_test.c:67:6: warning: implicit declaration of function ‘fcntl’
fuse_test.c:261:7: warning: implicit declaration of function ‘open’;
It's harmless but fixing this we can make the test report easier to
read.
[Fix]
* 1c49e3783f8899 ("selftests/memfd: Fix implicit declaration warnings")
This fix can be cherry-picked into F/F-oem-5.6/G and compiled without
any problem. Older kernel does not have this issue since they're
missing some other commits.
[Test Case]
Build the memfd test in tools/testing/selftests/ with:
sudo make TARGETS=memfd
With this fix, these warnings will be gone.
[Where problems could occur]
This fix is just for fixing the test case compilation, so it's not
affecting real kernel functionality.
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