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[Bug runtime/19000] several task tapset functions can cause kernel crash
- From: "mcermak at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Fri, 02 Oct 2015 18:53:06 +0000
- Subject: [Bug runtime/19000] several task tapset functions can cause kernel crash
- Auto-submitted: auto-generated
- References: <bug-19000-6586 at http dot sourceware dot org/bugzilla/>
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
=======
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