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List:       linux-rt-users
Subject:    glibc nptl tst-robustpi8.c crashes since v5.0.3-rt1
From:       He Zhe <zhe.he () windriver ! com>
Date:       2019-05-29 10:20:56
Message-ID: edd7c4be-738e-5b4f-73f4-0ff4b233a281 () windriver ! com
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Hi,

Since v5.0.3-rt1, glibc/nptl/tst-robustpi8.c causes the following crash.
https://github.com/lattera/glibc/blob/master/nptl/tst-robustpi8.c

root@intel-x86-64:~# ./tst-robustpi8
007: ------------[ cut here ]------------
007: kernel BUG at /buildarea2/zhe/repo/linux-rt-devel/kernel/locking/rtmutex.c:1336!
007: invalid opcode: 0000 [#1] PREEMPT SMP PTI
007: CPU: 7 PID: 536 Comm: tst-robustpi8 Tainted: G        W         \
                5.0.3-yocto-preempt-rt+ #23
007: Hardware name: Intel Corporation Broadwell Client platform/Basking Ridge, BIOS \
                BDW-E2R1.86C.0118.R01.1503110618 03/11/2015
007: RIP: 0010:task_blocks_on_rt_mutex+0x211/0x240
007: Code: 89 de 4c 89 e7 e8 0f f7 ff ff 4c 89 e7 e8 f7 f7 ff ff 49 8b 84 24 30 09 00 \
00 31 d2 48 83 f8 02 0f 97 c2 e9 07 ff ff ff 0f 0b <0f> 0b 0f 0b 48 89 5d c8 e9 99 fe \
                ff ff b8 dd ff ff ff e9 61 ff ff
007: RSP: 0018:ffffa15c41adfab0 EFLAGS: 00010096
007:
007: RAX: ffffa15c41adfc80 RBX: ffffa15c41adfb50 RCX: 0000000000000000
007: RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9af85af288d0
007: RBP: ffffa15c41adfaf0 R08: 0000000000000001 R09: 0000000000000000
007: R10: 0000000000000000 R11: ffff9af85af283a8 R12: ffff9af85af20000
007: R13: ffff9af85af288d0 R14: ffff9af85af28000 R15: ffffa15c414a2308
007: FS:  00007fac9dd8b700(0000) GS:ffff9af878fc0000(0000) knlGS:0000000000000000
007: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
007: CR2: 000055fd7d150240 CR3: 000000005af18005 CR4: 00000000003606e0
007: Call Trace:
007:  rt_spin_lock_slowlock_locked+0x87/0x230
007:  rt_spin_lock_slowlock+0x67/0xa0
007:  rt_spin_lock+0x38/0x40
007:  ? futex_lock_pi+0x2cd/0x490
007:  futex_lock_pi+0x2cd/0x490
007:  ? hrtimer_init_sleeper+0x130/0x130
007:  do_futex+0x330/0xc40
007:  ? trace_hardirqs_on_thunk+0x1a/0x1c
007:  ? _copy_from_user+0x36/0x70
007:  __se_sys_futex+0x7f/0x170
007:  __x64_sys_futex+0x29/0x30
007:  do_syscall_64+0x55/0x130
007:  entry_SYSCALL_64_after_hwframe+0x49/0xbe
007: RIP: 0033:0x7fac9f7590c4
007: Code: 85 c0 0f 84 ee 03 00 00 be 06 00 00 00 45 85 c0 0f 84 b0 04 00 00 4c 8b 54 \
24 18 ba 01 00 00 00 48 89 df b8 ca 00 00 00 0f 05 <3d> 00 f0 ff ff 0f 86 59 04 00 00 \
                83 f8 92 74 72 89 c2 83 e2 df 83
007: RSP: 002b:00007fac9dd8ade0 EFLAGS: 00000202
007:  ORIG_RAX: 00000000000000ca
007: RAX: ffffffffffffffda RBX: 00007fac9f7727d0 RCX: 00007fac9f7590c4
007: RDX: 0000000000000001 RSI: 0000000000000006 RDI: 00007fac9f7727d0
007: RBP: 00007fac9f7727e0 R08: 0000000000000010 R09: 0000000000000000
007: R10: 000055fd7d150240 R11: 0000000000000202 R12: 00007ffe550b363e
007: R13: 0000000000000218 R14: 00007fac9dd8b700 R15: 0000000000000000
007: Modules linked in:
007:
007: ---[ end trace ae0f59c8162f348b ]---
007: RIP: 0010:task_blocks_on_rt_mutex+0x211/0x240
007: Code: 89 de 4c 89 e7 e8 0f f7 ff ff 4c 89 e7 e8 f7 f7 ff ff 49 8b 84 24 30 09 00 \
00 31 d2 48 83 f8 02 0f 97 c2 e9 07 ff ff ff 0f 0b <0f> 0b 0f 0b 48 89 5d c8 e9 99 fe \
                ff ff b8 dd ff ff ff e9 61 ff ff
007: RSP: 0018:ffffa15c41adfab0 EFLAGS: 00010096
007:
007: RAX: ffffa15c41adfc80 RBX: ffffa15c41adfb50 RCX: 0000000000000000
007: RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9af85af288d0
007: RBP: ffffa15c41adfaf0 R08: 0000000000000001 R09: 0000000000000000
007: R10: 0000000000000000 R11: ffff9af85af283a8 R12: ffff9af85af20000
007: R13: ffff9af85af288d0 R14: ffff9af85af28000 R15: ffffa15c414a2308
007: FS:  00007fac9dd8b700(0000) GS:ffff9af878fc0000(0000) knlGS:0000000000000000
007: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
007: CR2: 000055fd7d150240 CR3: 000000005af18005 CR4: 00000000003606e0


Zhe


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