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authorDavid Howells <dhowells@redhat.com>2020-01-26 01:02:53 +0000
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-26 08:54:04 -0800
commita45ea48e2bcd92c1f678b794f488ca0bda9835b8 (patch)
treea2431d7794f409ed383c3813b4105494c32d58cd /drivers/infiniband
parentMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm (diff)
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afs: Fix characters allowed into cell names
The afs filesystem needs to prohibit certain characters from cell names, such as '/', as these are used to form filenames in procfs, leading to the following warning being generated: WARNING: CPU: 0 PID: 3489 at fs/proc/generic.c:178 Fix afs_alloc_cell() to disallow nonprintable characters, '/', '@' and names that begin with a dot. Remove the check for "@cell" as that is then redundant. This can be tested by running: echo add foo/.bar 1.2.3.4 >/proc/fs/afs/cells Note that we will also need to deal with: - Names ending in ".invalid" shouldn't be passed to the DNS. - Names that contain non-valid domainname chars shouldn't be passed to the DNS. - DNS replies that say "your-dns-needs-immediate-attention.<gTLD>" and replies containing A records that say 127.0.53.53 should be considered invalid. [https://www.icann.org/en/system/files/files/name-collision-mitigation-01aug14-en.pdf] but these need to be dealt with by the kafs-client DNS program rather than the kernel. Reported-by: syzbot+b904ba7c947a37b4b291@syzkaller.appspotmail.com Cc: stable@kernel.org Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/infiniband')
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