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Bug 1794959 - SELinux is preventing accounts-daemon from using the 'setsched' accesses on a process.
Summary: SELinux is preventing accounts-daemon from using the 'setsched' accesses on a...
Keywords:
Status: CLOSED DUPLICATE of bug 1795524
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: rawhide
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Zdenek Pytela
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: abrt_hash:575ec141e95739a84ae1e2df157...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-01-25 20:28 UTC by Matt Fagnani
Modified: 2020-01-28 08:48 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-01-28 08:48:01 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Matt Fagnani 2020-01-25 20:28:05 UTC 
Description of problem:
I ran sudo dnf upgrade --refresh on the Rawhide KDE Plasma spin on 2020-1-25. The upgrade included about ~300 rpms including glib2-2.63.4-1.fc32.x86_64, gcc-10.0.1-0.5.fc32.x86_64, sssd-2.2.2-5.fc32.x86_64, annobin-9.01-2.fc32.x86_64, binutils-2.33.1-12.fc32.x86_64, colord-1.4.4-3.fc32.x86_64, elfutils-0.178-8.fc32.x86_64. I rebooted. The plymouth output showed lines like 
Failed to start ModemManager 
Failed to start Accounts Service

The journal and audit logs had denials of ModemManager using setsched on a process with modemmanager_t possibly itself repeated many times. ModemManager restarted and was sent the trap signal. ModemManager crashed 9 times in total.

There were also denials of accounts-daemon using setsched and sysnice followed by accounts-daemon getting the trap signal and crashing once.
colord was denied setsched and crashed with the trap signal also. So the denials might be due to a change in a package that ModemManager, accounts-daemon, and colord were all using. glib2-2.63.4-1.fc32.x86_64 is in the traces of the crashing threads of each of them so glib might be involved. I'll submit the other denials and crashes separately and put the links here. The same denials and crashes happened on 2 consecutive boots.
SELinux is preventing accounts-daemon from using the 'setsched' accesses on a process.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that accounts-daemon should be allowed setsched access on processes labeled accountsd_t by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'accounts-daemon' --raw | audit2allow -M my-accountsdaemon
# semodule -X 300 -i my-accountsdaemon.pp

Additional Information:
Source Context                system_u:system_r:accountsd_t:s0
Target Context                system_u:system_r:accountsd_t:s0
Target Objects                Unknown [ process ]
Source                        accounts-daemon
Source Path                   accounts-daemon
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.5-20.fc32.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 5.5.0-0.rc6.git3.1.fc32.x86_64 #1
                              SMP Fri Jan 17 18:29:51 UTC 2020 x86_64 x86_64
Alert Count                   1
First Seen                    2020-01-25 14:29:55 EST
Last Seen                     2020-01-25 14:29:55 EST
Local ID                      6f28eecf-d2a2-42a2-997c-6ddf43eb7a8f

Raw Audit Messages
type=AVC msg=audit(1579980595.135:221): avc:  denied  { setsched } for  pid=985 comm="accounts-daemon" scontext=system_u:system_r:accountsd_t:s0 tcontext=system_u:system_r:accountsd_t:s0 tclass=process permissive=0


Hash: accounts-daemon,accountsd_t,accountsd_t,process,setsched

Version-Release number of selected component:
selinux-policy-3.14.5-20.fc32.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.11.3
hashmarkername: setroubleshoot
kernel:         5.5.0-0.rc6.git3.1.fc32.x86_64
type:           libreport
Comment 1 Matt Fagnani 2020-01-25 21:33:51 UTC 
accounts-daemon was denied sysnice at the same time with the following audit message
type=AVC msg=audit(1579980595.135:220): avc:  denied  { sys_nice } for  pid=985 comm="accounts-daemon" capability=23  scontext=system_u:system_r:accountsd_t:s0 tcontext=system_u:system_r:accountsd_t:s0 tclass=capability permissive=0

The accounts-daemon crash had errors like "Failed to set scheduler settings: Permission denied" in frame 2 g_logv at ../glib/gmessages.c:1350 in glib2-2.63.4-1.fc32.x86_64 and in frame 3. Those errors might be due to the denials

Core was generated by `/usr/libexec/accounts-daemon'.
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
 accountsservice-0.6.55-1.fc32.x86_64
#0  _g_log_abort (breakpoint=1) at ../glib/gmessages.c:554
554         G_BREAKPOINT ();
[Current thread is 1 (Thread 0x7fc6ef9bf700 (LWP 999))]
(gdb) bt full
#0  _g_log_abort (breakpoint=1) at ../glib/gmessages.c:554
        debugger_present = 1
#1  0x00007fc6fd911e89 in g_log_default_handler
    (log_domain=<optimized out>, log_level=<optimized out>, message=<optimized out>, unused_data=<optimized out>) at ../glib/gmessages.c:3123
        fields = 
            {{key = 0x7fc6fd963666 "GLIB_OLD_LOG_API", value = 0x7fc6fd9bc850, length = -1}, {key = 0x7fc6fd9635a1 "MESSAGE", value = 0x7fc6e0002b30, length = -1}, {key = 0x7fc6fd9635b4 "PRIORITY", value = 0x7fc6fd963462, length = -1}, {key = 0x7fc6fd96360e "GLIB_DOMAIN", value = 0x7fc6fd95900e, length = -1}}
        n_fields = <optimized out>
#2  0x00007fc6fd9120bb in g_logv
    (log_domain=0x7fc6fd95900e "GLib", log_level=G_LOG_LEVEL_ERROR, format=<optimized out>, args=args@entry=0x7fc6ef9bec90) at ../glib/gmessages.c:1350
        domain = 0x0
        data = 0x0
        depth = 1
        log_func = 0x560e68cd65d0 <log_handler>
        domain_fatal_mask = <optimized out>
        masquerade_fatal = 0
        test_level = 6
        was_fatal = 0
        was_recursion = 0
        msg = 0x7fc6e0002b30 "Failed to set scheduler settings: Permission denied"
        msg_alloc = 0x7fc6e0002b30 "Failed to set scheduler settings: Permission denied"
--Type <RET> for more, q to quit, c to continue without paging--c
        i = 2
#3  0x00007fc6fd9122a3 in g_log (log_domain=log_domain@entry=0x7fc6fd95900e "GLib", log_level=log_level@entry=G_LOG_LEVEL_ERROR, format=format@entry=0x7fc6fd9bee70 "Failed to set scheduler settings: %s") at ../glib/gmessages.c:1415
        args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fc6ef9bed70, reg_save_area = 0x7fc6ef9becb0}}
#4  0x00007fc6fd95752b in linux_pthread_proxy (data=0x560e69e67060) at ../glib/gthread-posix.c:1238
        tid = <optimized out>
        flags = 0
        res = <optimized out>
        thread = 0x560e69e67060
#5  0x00007fc6fd5aa432 in start_thread (arg=<optimized out>) at pthread_create.c:477
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140492400228096, -7997416898972201573, 140731737061774, 140731737061775, 140731737061920, 140492400228096, 7966490075805404571, 7966459850453175707}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007fc6fd7a2873 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Those errors are the same as those from the ModemManager crashes at https://bugzilla.redhat.com/show_bug.cgi?id=1794964
Comment 2 Mikhail 2020-01-26 15:03:05 UTC 
Similar problem has been detected:

happens when I start virtual machine or build package in mock

hashmarkername: setroubleshoot
kernel:         5.5.0-0.rc7.git0.2.fc32.x86_64
package:        selinux-policy-3.14.5-20.fc32.noarch
reason:         SELinux is preventing accounts-daemon from using the 'setsched' accesses on a process.
type:           libreport
Comment 3 Lukas Vrabec 2020-01-28 08:48:01 UTC 

*** This bug has been marked as a duplicate of bug 1795524 ***
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