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3c02e04fd4
crypto: Fix divide error in do_xor_speed()
From: Kirill Tkhai <ktkhai@virtuozzo.com>
Latest (but not only latest) linux-next panics with divide
error on my QEMU setup.
The patch at the bottom of this message fixes the problem.
xor: measuring software checksum speed
divide error: 0000 [#1] PREEMPT SMP KASAN
PREEMPT SMP KASAN
CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.10.0-next-20201223+ #2177
RIP: 0010:do_xor_speed+0xbb/0xf3
Code: 41 ff cc 75 b5 bf 01 00 00 00 e8 3d 23 8b fe 65 8b 05 f6 49 83 7d 85 c0 75 05 e8
84 70 81 fe b8 00 00 50 c3 31 d2 48 8d 7b 10 <f7> f5 41 89 c4 e8 58 07 a2 fe 44 89 63 10 48 8d 7b 08
e8 cb 07 a2
RSP: 0000:ffff888100137dc8 EFLAGS: 00010246
RAX: 00000000c3500000 RBX: ffffffff823f0160 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000808 RDI: ffffffff823f0170
RBP: 0000000000000000 R08: ffffffff8109c50f R09: ffffffff824bb6f7
R10: fffffbfff04976de R11: 0000000000000001 R12: 0000000000000000
R13: ffff888101997000 R14: ffff888101994000 R15: ffffffff823f0178
FS: 0000000000000000(0000) GS:ffff8881f7780000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000220e000 CR4: 00000000000006a0
Call Trace:
calibrate_xor_blocks+0x13c/0x1c4
? do_xor_speed+0xf3/0xf3
do_one_initcall+0xc1/0x1b7
? start_kernel+0x373/0x373
? unpoison_range+0x3a/0x60
kernel_init_freeable+0x1dd/0x238
? rest_init+0xc6/0xc6
kernel_init+0x8/0x10a
ret_from_fork+0x1f/0x30
---[ end trace 5bd3c1d0b77772da ]---
Fixes:
|
History
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
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In order to build the documentation, use ``make htmldocs`` or
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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
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