This is the mail archive of the systemtap@sourceware.org mailing list for the systemtap project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[Bug runtime/19000] several task tapset functions can cause kernel crash


https://sourceware.org/bugzilla/show_bug.cgi?id=19000

--- Comment #4 from Martin Cermak <mcermak at redhat dot com> ---
Hmm, same with `stap -ge 'probe oneshot {println(task_euid(0))}'` on rhel7.2 /
s390x kernel:

=======
[ 3661.098528] stap_d81f3e59f58b2c26a85410ab00420e35_3393: module verification
f
ailed: signature and/or required key missing - tainting kernel
[ 3661.138794] Unable to handle kernel pointer dereference at virtual kernel
add
ress 00a8b00000011000
[ 3661.138835] Oops: 0038 [#1] SMP
[ 3661.138839] Modules linked in:
stap_d81f3e59f58b2c26a85410ab00420e35_3393(OE)
 nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache vmur nfsd auth_rpcgss
nfs_
acl lockd grace sunrpc ip_tables xfs libcrc32c dasd_fba_mod qeth_l2
dasd_eckd_mo
d dasd_mod lcs ctcm fsm qeth qdio ccwgroup dm_mirror dm_region_hash dm_log
dm_mo
d
[ 3661.138874] CPU: 0 PID: 3393 Comm: stapio Tainted: G           OE 
----------
--   3.10.0-319.el7.s390x #1
[ 3661.138877] task: 000000007d439b90 ti: 000000007cb98000 task.ti:
000000007cb9
8000
[ 3661.138881] Krnl PSW : 0704e00180000000 00000000001c2816
(map_id_up+0x6/0x80)

[ 3661.138890]            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0
EA:
3
Krnl GPRS: 0000000000000081 00000000001c28e0 00a8b00000011202 0000000000000000
[ 3661.138935]            000003ff00000001 0000000000000000 000003e0817fa270
000
000007cb9bd90
[ 3661.138941]            0000000000000000 000003e0817fa000 000003ff00000001
000
0000000000000
[ 3661.138943]            000000000000000c 000000000000092f 00000000001c2908
000
000007cb9bcc0
[ 3661.138952] Krnl Code: 00000000001c280c: 07fe                bcr     15,%r14
           00000000001c280e: 0707               bcr     0,%r7
          #00000000001c2810: ebbcf0700024       stmg    %r11,%r12,112(%r15)
          >00000000001c2816: 58b02000           l       %r11,0(%r2)
           00000000001c281a: 07e0               bcr     14,%r0
           00000000001c281c: ecb8001b007e       cij     %r11,0,8,1c2852
           00000000001c2822: b9040012           lgr     %r1,%r2
           00000000001c2826: a7080000           lhi     %r0,0
[ 3661.139022] Call Trace:
[ 3661.139025] ([<0000000000000001>] 0x1)
[ 3661.139031]  [<000003ff8092e508>] probe_2757+0x178/0x320
[stap_d81f3e59f58b2c
26a85410ab00420e35_3393]
[ 3661.139038]  [<000003ff8092fade>] 01: HCPGSP2629I The virtual machine is
plac
ed in CP mode due to a SIGP stop from
 CPU 01.
enter_be_probe+0x10e/0x230 [stap_d81f3e59f58b2c26a85410ab00420e35_3393]
[ 3661.139070]  [<000003ff80930a5e>] _stp_ctl_write_cmd+0x94e/0x9d0
[stap_d81f3e
59f58b2c26a85410ab00420e35_3393]
[ 3661.139073]  [<000000000028b4ea>] vfs_write+0xa2/0x1c8
[ 3661.139078]  [<000000000028c084>] SyS_write+0x6c/0x100
[ 3661.139081]  [<00000000005d66fa>] sysc_tracego+0x14/0x1a
[ 3661.139087]  [<000003fffd475520>] 0x3fffd475520
[ 3661.139094] Last Breaking-Event-Address:
[ 3661.139102]  [<00000000001c2902>] from_kuid_munged+0x22/0x48
[ 3661.139106]
[ 3661.139107] Kernel panic - not syncing: Fatal exception: panic_on_oops
00: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000
0010EC20
=======

-- 
You are receiving this mail because:
You are the assignee for the bug.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]