The rulesets still don't explicitly forbid this syscall and it still
gets massively logged into dmesg, making it totally unusable.
```
audit: type=1326 audit(1610482813.754:1835962): auid=1000 uid=1000 gid=1000
ses=4 pid=2201984 comm="chrome"
exe="/snap/chromium/1444/usr/lib/chromium-browser/chr
The relevant syscall is `sched_setaffinity`, which when used with a
first argument of `0` is allowed in the default policy. Can someone who
is experiencing this bug run an strace to determine what argument
chromium is trying to use with sched_setaffinity ? We allow any
sched_setaffinity arguments w
It doesn't break it visibly. I would prefer if it were allowed to set
its affinity, but if that can't be done, silencing is a must. This is
incredibly spammy.
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> Can someone who is experiencing this bug run an strace to determine
what argument chromium is trying to use with sched_setaffinity ?
I'm not sure how its possible to strace a snap container ran under a
specific user. Could you provide the command?
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Title:
[snap] chromium spams dmesg
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[pid 1278569] sched_setaffinity(1278640, 128, [18, 19, 20, 21, 22, 23]
[pid 1278569] <... sched_setaffinity resumed>) = -1 EPERM (Operation not
permitted)
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[pid 1278591] sched_setaffinity(1278591, 128, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
So I did a bit of looking and it appears that Chromium only calls
sched_setaffinity for it's renderer threads on Android (maybe?). I'm not
super familiar with Chromium source code so it's a bit difficult for me
to tell, but I tried playing videos etc. which might trigger some sort
of rendering code
> @avamander, do you have a reproducer for this?
I'm just using it on a Ryzen 9 3900x and Radeon R7 360. I have GPU
acceleration enabled to the extent it is possible.
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I see sched_setaffinity also used in base/cpu_affinity_posix.cc, so I
doubt it's only beneficial on ARM.
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Title:
[snap] chromium spams dmesg
To
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: chromium-browser (Ubuntu)
Status: New => Confirmed
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Ti
This is not chromium-specific, those are audit messages emitted by
apparmor (see
https://gitlab.com/apparmor/apparmor/-/wikis/AppArmorAuditing for
details).
Installing auditd might help.
** Changed in: chromium-browser (Ubuntu)
Status: New => Incomplete
** Changed in: chromium-browser (Ub
Your rulesets are bad, it's not apparmor's fault.
** Changed in: chromium-browser (Ubuntu)
Status: Invalid => New
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Title:
snap chromium s
** Summary changed:
- snap chromium spams dmesg
+ [snap] chromium spams dmesg
** Tags added: snap
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Title:
[snap] chromium spams dmesg
To manag
** Package changed: snap (Ubuntu) => snapd (Ubuntu)
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Title:
[snap] chromium spams dmesg
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