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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 12:56:44 +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 #3 from Martin Cermak <mcermak at redhat dot com> ---
Using stap release-2.9-4-g4dc97b40ad9e, `stap -ge 'probe oneshot
{println(task_egid(0))}'` still seems to kill the rhel7/s390x kernel:
=======
[ 727.130211] stap_09eb0146da34d3191a27df63ae2c7fb4_3098: module verification
f
ailed: signature and/or required key missing - tainting kernel
[ 727.170592] Unable to handle kernel pointer dereference at virtual kernel
add
ress 00a8b00000001000
[ 727.170635] Oops: 0038 [#1] SMP
[ 727.170639] Modules linked in:
stap_09eb0146da34d3191a27df63ae2c7fb4_3098(OE)
vmur nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c
dasd_f
ba_mod qeth_l2 dasd_eckd_mod dasd_mod lcs ctcm qeth qdio ccwgroup fsm dm_mirror
dm_region_hash dm_log dm_mod
[ 727.170667] CPU: 1 PID: 3098 Comm: stapio Tainted: G OE
----------
-- 3.10.0-319.el7.s390x #1
[ 727.170671] task: 0000000001fa5be0 ti: 000000007ab54000 task.ti:
000000007ab5
4000
[ 727.170675] Krnl PSW : 0704e00180000000 00000000001c2816
(map_id_up+0x6/0x80)
[ 727.170683] 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 00000000001c2980 00a8b00000001044 0000000000000000
[ 727.170692] 000003ff00000001 0000000000000000 000003e081e05270
000
000007ab57d90
[ 727.170701] 0000000000000000 000003e081e05000 000003ff00000001
000
0000000000000
[ 727.170702] 000000000000000c 000000000000092f 00000000001c29ac
000
000007ab57cc0
[ 727.170710] 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
[ 727.170722] Call Trace:
[ 727.170723] ([<0000000000000001>] 0x1)
[ 727.170725] [<000003ff80839508>] probe_2757+0x178/0x320
[stap_09eb0146da34d3
191a27df63ae2c7fb4_3098]
[ 727.170728] [<000003ff8083aade>] enter_be_probe+0x10e/0x230
[stap_09eb0146da
34d3191a27df63ae2c7fb4_3098]
[ 727.170730] [<000003ff8083ba5e>] _stp_ctl_write_cmd+0x94e/0x9d0
[stap_09eb01
46da34d3191a27df63ae2c7fb4_3098]
[ 727.170733] [<000000000028b4ea>] vfs_write+0xa2/0x1c8
[ 727.170737] [<000000000028c084>] SyS_write+0x6c/0x100
[ 727.170738] [<00000000005d66fa>] sysc_tracego+0x14/0x1a
[ 727.170742] [<000003fffd389520>] 0x3fffd389520
[ 727.170744] Last Breaking-Event-Address:
[ 727.170744] [<00000000001c29a6>] from_kgid_munged+0x26/0x48
[ 727.170746]
[ 727.170747] Kernel panic - not syncing: Fatal exception: panic_on_oops
00: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop
from
CPU 00.
01: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000
0010EC20
=======
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