[kernel] bug#121: User fault on kernel space handler infinite loop


X-PA-RISC Linux-PR-Message: report 121
X-PA-RISC Linux-PR-Package: kernel
X-Loop: daniel_frazier@hp.com
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          (code B ref -1); Mon, 07 May 2001 19:48:01 GMT
Date: Mon, 7 May 2001 13:38:08 -0600
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From: willy@ldl.fc.hp.com (Matthew Wilcox)

Package: kernel

I accidentally caused the kernel to spew out an infinite number of:

User Fault on Kernel Space pid=19882 command='ld.so.1'

PSW: 00000000000001000000000000001111
r0-3     0000000000000000 0000000040029db8 0000000040005e73 00000000400003f8
r4-7     0000000040029db8 0000000000088750 00000000410295d4 000000007ff00d38
r8-11    000000007ff00d30 0000000000000001 0000000000000001 000000000008a330
r12-15   0000000000000000 0000000000000000 000000000008a570 0000000000000000
r16-19   0000000000000000 0000000000000000 0000000000000000 0000000040029db8
r20-23   0000000040027060 000000004102a008 0000000040005e5c 0000000041029468
r24-27   000000007ff00d38 000000007ff00d30 0000000000000001 000000000002091c
r28-31   000000004102a39a 00000000410295d4 000000007ff00f80 00000000400097a7
sr0-3    0000000000036a80 0000000000036a80 0000000000000000 0000000000036a80
sr4-7    0000000000036a80 0000000000036a80 0000000000036a80 0000000000036a80

IASQ: 0000000000000000 0000000000000000 IAOQ: 0000000040005e73 0000000040005e77
 IIR: 43ffff80    ISR: 0000000000036a80  IOR: 0000000040027024
ORIG_R28: 0000000040172000

of course the machine got very slow, etc.  And the process didn't get
killed as it was clearly supposed to.