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Wed, 16 Apr 2025 07:07:17 +0000 (GMT) Message-ID: <1db64a42-626d-4b3a-be08-c65e47333ce2@linux.ibm.com> Date: Wed, 16 Apr 2025 12:37:15 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-GB To: LKML , Madhavan Srinivasan , Hari Bathini , Steven Rostedt From: Venkat Rao Bagalkote Subject: [mainline]Kernel crash while running ftrace selftest Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: IcypP3BIs4qVlsnIwj7v5JcpUgHh7_vd X-Proofpoint-GUID: IcypP3BIs4qVlsnIwj7v5JcpUgHh7_vd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-16_02,2025-04-15_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 mlxscore=0 spamscore=0 malwarescore=0 mlxlogscore=787 impostorscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504160056 Hello, I am seeing kernel crash while running ftrace selftest on today mainline kernel. Head Commit: g1a1d569a75f3. After reverting below commit 0ae6b8ce200da00a78f33c055fdc4fe3225d22ec, issue is not seen. Traces: [15137.589286] Oops: Kernel access of bad area, sig: 11 [#1] [15137.589291] LE PAGE_SIZE=64K MMU=Hash  SMP NR_CPUS=8192 NUMA pSeries [15137.589298] Modules linked in: nft_compat(E) ext4(E) crc16(E) mbcache(E) jbd2(E) 8021q(E) garp(E) mrp(E) stp(E) llc(E) vrf(E) tun(E) veth(E) bonding(E) tls(E) nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nf_reject_ipv4(E) nf_reject_ipv6(E) nft_reject(E) nft_ct(E) rfkill(E) nft_chain_nat(E) ip_set(E) bnx2x(E) pseries_rng(E) be2net(E) mdio(E) ibmveth(E) hvcs(E) hvcserver(E) sg(E) vmx_crypto(E) drm(E) dm_mod(E) fuse(E) drm_panel_orientation_quirks(E) xfs(E) lpfc(E) nvmet_fc(E) nvmet(E) sr_mod(E) sd_mod(E) cdrom(E) nvme_fc(E) nvme_fabrics(E) ibmvscsi(E) scsi_transport_srp(E) nvme_core(E) scsi_transport_fc(E) [last unloaded: test_bpf(E)] [15137.589400] CPU: 0 UID: 0 PID: 146764 Comm: ftracetest Tainted: G        W  OE       6.15.0-rc2-g1a1d569a75f3 #1 VOLUNTARY [15137.589410] Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE [15137.589415] Hardware name: IBM,8375-42A POWER9 (architected) 0x4e0202 0xf000005 of:IBM,FW950.80 (VL950_131) hv:phyp pSeries [15137.589422] NIP:  c0000000003e4738 LR: c0000000003ec708 CTR: 000000000000a6a4 [15137.589428] REGS: c00000001473f720 TRAP: 0300   Tainted: G        W  OE        (6.15.0-rc2-g1a1d569a75f3) [15137.589435] MSR:  800000000280b033   CR: 42228282  XER: 00000000 [15137.589459] CFAR: c00000000000dbac DAR: 0000000000000014 DSISR: 40000000 IRQMASK: 0 [15137.589459] GPR00: c0000000003ec6ec c00000001473f9c0 c000000001da8100 0000000000000004 [15137.589459] GPR04: c000000001356618 0000000000000001 0000000000000000 c000000002ccbb88 [15137.589459] GPR08: 0000000000002710 0000000000000004 0000000000000000 0000000000008000 [15137.589459] GPR12: c00000001473f6a8 c000000002fd0000 0000000000000000 0000000000000000 [15137.589459] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [15137.589459] GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [15137.589459] GPR24: 0000000000000000 c0000000aeb5b1b0 0000000000000004 c000000156bbdd00 [15137.589459] GPR28: c000000002c24988 0000000000000004 c000000156bbdd00 c000000002c24960 [15137.589546] NIP [c0000000003e4738] ops_equal+0x8/0x170 [15137.589553] LR [c0000000003ec708] ftrace_update_ops+0x78/0xe0 [15137.589561] Call Trace: [15137.589564] [c00000001473f9c0] [c0000000003ec6ec] ftrace_update_ops+0x5c/0xe0 (unreliable) [15137.589575] [c00000001473fa00] [c0000000003f31b4] ftrace_startup_subops+0x124/0x5c0 [15137.589583] [c00000001473faa0] [c0000000004351fc] register_ftrace_graph+0x2cc/0x550 [15137.589592] [c00000001473fb80] [c00000000042c374] graph_trace_init+0x74/0xa0 [15137.589600] [c00000001473fbb0] [c000000000413828] tracing_set_tracer+0x3c8/0x610 [15137.589609] [c00000001473fc50] [c000000000413b1c] tracing_set_trace_write+0xac/0x120 [15137.589618] [c00000001473fd10] [c0000000006ecb90] vfs_write+0x160/0x4d0 [15137.589626] [c00000001473fdc0] [c0000000006ed230] ksys_write+0x80/0x150 [15137.589635] [c00000001473fe10] [c0000000000325a4] system_call_exception+0x114/0x300 [15137.589644] [c00000001473fe50] [c00000000000d05c] system_call_vectored_common+0x15c/0x2ec [15137.589653] --- interrupt: 3000 at 0x7fff88416234 [15137.589661] NIP:  00007fff88416234 LR: 00007fff88416234 CTR: 0000000000000000 [15137.589666] REGS: c00000001473fe80 TRAP: 3000   Tainted: G        W  OE        (6.15.0-rc2-g1a1d569a75f3) [15137.589673] MSR:  800000000280f033   CR: 4822244e  XER: 00000000 [15137.589696] IRQMASK: 0 [15137.589696] GPR00: 0000000000000004 00007fffed647a40 00007fff88527100 0000000000000001 [15137.589696] GPR04: 000001003178d420 000000000000000f 000000006172675f 000000000000000e [15137.589696] GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [15137.589696] GPR12: 0000000000000000 00007fff8868b1c0 0000000124cc005c 000001003180ab30 [15137.589696] GPR16: 0000000124cc9528 000001003180aba0 0000000040000000 0000000124bd2f20 [15137.589696] GPR20: 0000000000000000 00007fffed647c64 0000000000000001 0000000124c72d68 [15137.589696] GPR24: 0000000124cc8bac 0000000124cc8bb8 0000000000000000 000001003178d420 [15137.589696] GPR28: 000000000000000f 00007fff885217f0 000001003178d420 000000000000000f [15137.589777] NIP [00007fff88416234] 0x7fff88416234 [15137.589783] LR [00007fff88416234] 0x7fff88416234 [15137.589788] --- interrupt: 3000 [15137.589792] Code: 60000000 60000000 e92500d0 2c290000 4d820020 f9260110 4e800020 60000000 60000000 60000000 7c691b79 4182011c 2c2a0000 418200d0 2c240000 [15137.589824] ---[ end trace 0000000000000000 ]--- If you happen to fix this issue, please add below tag. Reported-by: Venkat Rao Bagalkote Regards, Venkat.