devices: correctly check device types #2529
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Can we have rc92 right after merging this? |
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Sure, especially since this breaks Docker. |
AkihiroSuda
reviewed
Jul 28, 2020
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Thanks! |
AkihiroSuda
reviewed
Jul 28, 2020
(mode&S_IFCHR == S_IFCHR) is the wrong way of checking the type of an inode because the S_IF* bits are actually not a bitmask and instead must be checked using S_IF*. This bug was neatly hidden behind a (major == 0) sanity-check but that was removed by [1]. In addition, add a test that makes sure that HostDevices() doesn't give rubbish results -- because we broke this and fixed this before[2]. [1]: 24388be ("configs: use different types for .Devices and .Resources.Devices") [2]: 3ed492a ("Handle non-devices correctly in DeviceFromPath") Fixes: b0d014d ("libcontainer: one more switch from syscall to x/sys/unix") Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
AkihiroSuda
approved these changes
Jul 28, 2020
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Thanks @cyphar 👍 |
mrunalp
approved these changes
Jul 28, 2020
This was referenced Dec 1, 2021
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(mode&S_IFCHR == S_IFCHR) is the wrong way of checking the type of an
inode because the S_IF* bits are actually not a bitmask and instead must
be checked using S_IF*. This bug was neatly hidden behind a (major == 0)
sanity-check but that was removed by me[1].
In addition, add a test that makes sure that HostDevices() doesn't give
rubbish results -- because we broke this and fixed this before[2].
[1] 24388be ("configs: use different types for .Devices and .Resources.Devices")
[2] 3ed492a ("Handle non-devices correctly in DeviceFromPath")
Fixes: b0d014d ("libcontainer: one more switch from syscall to x/sys/unix")
Signed-off-by: Aleksa Sarai cyphar@cyphar.com