linux-kernel - next-20250605: Test regression: qemu-x86_64-compat mode ltp tracing Oops int3 kernel panic

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Message-ID: <CA+G9fYsLu0roY3DV=tKyqP7FEKbOEETRvTDhnpPxJGbA=Cg+4w@mail.gmail.com>
Date: Thu, 5 Jun 2025 17:12:10 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: open list <linux-kernel@...r.kernel.org>, 
	Linux trace kernel <linux-trace-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org
Cc: Stephen Rothwell <sfr@...b.auug.org.au>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Anders Roxell <anders.roxell@...aro.org>
Subject: next-20250605: Test regression: qemu-x86_64-compat mode ltp tracing
 Oops int3 kernel panic

Regressions found on qemu-x86_64 with compat mode (64-bit kernel
running on 32-bit userspace) while running LTP tracing test suite
on Linux next-20250605 tag kernel.

Regressions found on
 - LTP tracing

Regression Analysis:
 - New regression? Yes
 - Reproducible? Intermittent

Test regression: qemu-x86_64-compat mode ltp tracing Oops int3 kernel panic

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

## Test log
ftrace-stress-test: <12>[   21.971153] /usr/local/bin/kirk[277]:
starting test ftrace-stress-test (ftrace_stress_test.sh 90)
<4>[   58.997439] Oops: int3: 0000 [#1] SMP PTI
<4>[   58.998089] CPU: 0 UID: 0 PID: 323 Comm: sh Not tainted
6.15.0-next-20250605 #1 PREEMPT(voluntary)
<4>[   58.998152] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),
BIOS 1.16.3-debian-1.16.3-2 04/01/2014
<4>[   58.998260] RIP: 0010:_raw_spin_lock+0x5/0x50
<4>[   58.998563] Code: 5d e9 ff 12 00 00 66 66 2e 0f 1f 84 00 00 00
00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
0f 1e fa 0f <1f> 44 00 00 55 48 89 e5 53 48 89 fb bf 01 00 00 00 e8 15
12 e4 fe
<4>[   58.998610] RSP: 0018:ffff9494007bbe98 EFLAGS: 00000246
<4>[   58.998715] RAX: ffff912a042edd00 RBX: 000000000000000b RCX:
0000000000000000
<4>[   58.998727] RDX: 0000000000000000 RSI: 0000000000000006 RDI:
ffff912a00f2c8c0
<4>[   58.998737] RBP: ffff9494007bbeb8 R08: 0000000000000000 R09:
0000000000000000
<4>[   58.998748] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff912a00f2c8c0
<4>[   58.998759] R13: ffff912a00f2c840 R14: 0000000000000006 R15:
0000000000000000
<4>[   58.998804] FS:  0000000000000000(0000)
GS:ffff912ad7cbf000(0063) knlGS:00000000f7f05580
<4>[   58.998821] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
<4>[   58.998832] CR2: 00000000f7d8f890 CR3: 000000010124e000 CR4:
00000000000006f0
<4>[   58.998915] Call Trace:
<4>[   58.999010]  <TASK>
<4>[   58.999077]  ? file_close_fd+0x32/0x60
<4>[   58.999147]  __ia32_sys_close+0x18/0x90
<4>[   58.999172]  ia32_sys_call+0x1c3c/0x27e0
<4>[   58.999183]  __do_fast_syscall_32+0x79/0x1e0
<4>[   58.999194]  do_fast_syscall_32+0x37/0x80
<4>[   58.999203]  do_SYSENTER_32+0x23/0x30
<4>[   58.999211]  entry_SYSENTER_compat_after_hwframe+0x84/0x8e
<4>[   58.999254] RIP: 0023:0xf7f0c579
<4>[   58.999459] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10
08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5
0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 2e 8d b4 26 00 00 00 00 8d b4 26
00 00 00
<4>[   58.999466] RSP: 002b:00000000fff98500 EFLAGS: 00000206
ORIG_RAX: 0000000000000006
<4>[   58.999479] RAX: ffffffffffffffda RBX: 000000000000000b RCX:
0000000000000000
<4>[   58.999484] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000000
<4>[   58.999488] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000000000000000
<4>[   58.999492] R10: 0000000000000000 R11: 0000000000000206 R12:
0000000000000000
<4>[   58.999497] R13: 0000000000000000 R14: 0000000000000000 R15:
0000000000000000
<4>[   58.999534]  </TASK>
<4>[   58.999579] Modules linked in:
<4>[   58.999895] ---[ end trace 0000000000000000 ]---
<4>[   58.999892] Oops: int3: 0000 [#2] SMP PTI
<4>[   58.999997] RIP: 0010:_raw_spin_lock+0x5/0x50
<4>[   59.000008] Code: 5d e9 ff 12 00 00 66 66 2e 0f 1f 84 00 00 00
00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
0f 1e fa 0f <1f> 44 00 00 55 48 89 e5 53 48 89 fb bf 01 00 00 00 e8 15
12 e4 fe
<4>[   59.000010] CPU: 1 UID: 0 PID: 339 Comm: sh Tainted: G      D
         6.15.0-next-20250605 #1 PREEMPT(voluntary)
<4>[   59.000014] RSP: 0018:ffff9494007bbe98 EFLAGS: 00000246
<4>[   59.000021] RAX: ffff912a042edd00 RBX: 000000000000000b RCX:
0000000000000000
<4>[   59.000026] RDX: 0000000000000000 RSI: 0000000000000006 RDI:
ffff912a00f2c8c0
<4>[   59.000030] RBP: ffff9494007bbeb8 R08: 0000000000000000 R09:
0000000000000000
<4>[   59.000040] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff912a00f2c8c0
<4>[   59.000044] R13: ffff912a00f2c840 R14: 0000000000000006 R15:
0000000000000000
<4>[   59.000049] FS:  0000000000000000(0000)
GS:ffff912ad7cbf000(0063) knlGS:00000000f7f05580
<4>[   59.000054] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
<4>[   59.000059] CR2: 00000000f7d8f890 CR3: 000000010124e000 CR4:
00000000000006f0
<4>[   59.000070] Tainted: [D]=DIE
<4>[   59.000080] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),
BIOS 1.16.3-debian-1.16.3-2 04/01/2014
<4>[   59.000085] RIP: 0010:_raw_spin_lock+0x5/0x50
<4>[   59.000101] Code: 5d e9 ff 12 00 00 66 66 2e 0f 1f 84 00 00 00
00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
0f 1e fa 0f <1f> 44 00 00 55 48 89 e5 53 48 89 fb bf 01 00 00 00 e8 15
12 e4 fe
<4>[   59.000108] RSP: 0018:ffff9494000e0e88 EFLAGS: 00000097
<4>[   59.000117] RAX: 0000000000010002 RBX: ffff912a7bd29500 RCX:
ffff912a7bd2a400
<0>[   59.000179] Kernel panic - not syncing: Fatal exception in interrupt
<0>[   60.592321] Shutting down cpus with NMI
<0>[   60.593242] Kernel Offset: 0x20800000 from 0xffffffff81000000
(relocation range: 0xffffffff80000000-0xffffffffbfffffff)
<0>[   60.618536] ---[ end Kernel panic - not syncing: Fatal exception
in interrupt ]---

## Source
* Kernel version: 6.15.0-next-20250605
* Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
* Git sha: 4f27f06ec12190c7c62c722e99ab6243dea81a94

## Build
* Test log: https://qa-reports.linaro.org/api/testruns/28675335/log_file/
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2y4whKazVqJKOUFD08taHC8XHRq/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2y4whKazVqJKOUFD08taHC8XHRq/config


--
Linaro LKFT
https://lkft.linaro.org