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1f3aed0147
When selecting function_graph tracer with the command:
# echo function_graph > /sys/kernel/debug/tracing/current_tracer
The kernel crashes with the following stack trace:
[69703.122389] BUG: stack guard page was hit at 000000001056545c (stack is 00000000fa3f8fed..0000000005d39503)
[69703.122403] kernel stack overflow (double-fault): 0000 [#1] SMP PTI
[69703.122413] CPU: 0 PID: 16982 Comm: bash Kdump: loaded Not tainted 4.18.0-236.el8.x86_64 #1
[69703.122420] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.0 12/17/2019
[69703.122433] RIP: 0010repare_ftrace_return+0xa/0x110
[69703.122458] Code: 05 00 0f 0b 48 c7 c7 10 ca 69 ae 0f b6 f0 e8 4b 52 0c 00 31 c0 eb ca 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 41 55 41 54 <53> 48 83 ec 18 65 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 48 85
[69703.122467] RSP: 0018:ffffbd6d01118000 EFLAGS: 00010086
[69703.122476] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
[69703.122484] RDX: 0000000000000000 RSI: ffffbd6d011180d8 RDI: ffffffffadce7550
[69703.122491] RBP: ffffbd6d01118018 R08: 0000000000000000 R09: ffff9d4b09266000
[69703.122498] R10: ffff9d4b0fc04540 R11: ffff9d4b0fc20a00 R12: ffff9d4b6e42aa90
[69703.122506] R13: ffff9d4b0fc20ab8 R14: 00000000000003e8 R15: ffffbd6d0111837c
[69703.122514] FS: 00007fd5f2588740(0000) GS:ffff9d4b6e400000(0000) knlGS:0000000000000000
[69703.122521] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[69703.122528] CR2: ffffbd6d01117ff8 CR3: 00000000565d8001 CR4: 00000000003606f0
[69703.122538] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[69703.122545] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[69703.122552] Call Trace:
[69703.122568] ftrace_graph_caller+0x6b/0xa0
[69703.122589] ? read_hv_sched_clock_tsc+0x5/0x20
[69703.122599] read_hv_sched_clock_tsc+0x5/0x20
[69703.122611] sched_clock+0x5/0x10
[69703.122621] sched_clock_local+0x12/0x80
[69703.122631] sched_clock_cpu+0x8c/0xb0
[69703.122644] trace_clock_global+0x21/0x90
[69703.122655] ring_buffer_lock_reserve+0x100/0x3c0
[69703.122671] trace_buffer_lock_reserve+0x16/0x50
[69703.122683] __trace_graph_entry+0x28/0x90
[69703.122695] trace_graph_entry+0xfd/0x1a0
[69703.122705] ? read_hv_clock_tsc_cs+0x10/0x10
[69703.122714] ? sched_clock+0x5/0x10
[69703.122723] prepare_ftrace_return+0x99/0x110
[69703.122734] ? read_hv_clock_tsc_cs+0x10/0x10
[69703.122743] ? sched_clock+0x5/0x10
[69703.122752] ftrace_graph_caller+0x6b/0xa0
[69703.122768] ? read_hv_clock_tsc_cs+0x10/0x10
[69703.122777] ? sched_clock+0x5/0x10
[69703.122786] ? read_hv_sched_clock_tsc+0x5/0x20
[69703.122796] ? ring_buffer_unlock_commit+0x1d/0xa0
[69703.122805] read_hv_sched_clock_tsc+0x5/0x20
[69703.122814] ftrace_graph_caller+0xa0/0xa0
[ ... recursion snipped ... ]
Setting the notrace attribute for read_hv_sched_clock_msr() and
read_hv_sched_clock_tsc() fixes it.
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.