[Bugme-janitors] [Bug 9580] New: Dereferencing NULL pointer on
kernel/irq/manage.c
bugme-daemon at bugzilla.kernel.org
bugme-daemon at bugzilla.kernel.org
Sat Dec 15 16:56:21 PST 2007
http://bugzilla.kernel.org/show_bug.cgi?id=9580
Summary: Dereferencing NULL pointer on kernel/irq/manage.c
Product: IO/Storage
Version: 2.5
KernelVersion: 2.6.23
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: io_other at kernel-bugs.osdl.org
ReportedBy: marciobuss at gmail.com
There's a potential null pointer dereference on kernel/irq/manage.c.
The error can be tracked down as follows:
(1) assume the "if" statement at line 334 is true
(2) let the first conjunct "desc->chip" on the "if" statement at line
335 be false, which means "desc->chip" points-to null and
also signifies that the "if" statement evaluates to false.
(3) the else statement starting at line 338 executes, which
means "printk" prints "unknown" as its last word
(4) let the "if" statement on line 353 be true
(5) now "desc->chip" is dereferenced at line 356 although it is null.
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