/// If list_for_each_entry, etc complete a traversal of the list, the iterator
/// variable ends up pointing to an address at an offset from the list head,
/// and not a meaningful structure. Thus this value should not be used after
/// the end of the iterator.
//#False positives arise when there is a goto in the iterator and the
//#reported reference is at the label of this goto. Some flag tests
//#may also cause a report to be a false positive.
///
// Confidence: Moderate
// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2012 Gilles Muller, INRIA/LIP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: --no-includes --include-headers
virtual context
virtual org
virtual report
@r exists@
identifier c,member;
expression E,x;
iterator name list_for_each_entry;
iterator name list_for_each_entry_reverse;
iterator name list_for_each_entry_continue;
iterator name list_for_each_entry_continue_reverse;
iterator name list_for_each_entry_from;
iterator name list_for_each_entry_safe;
iterator name list_for_each_entry_safe_continue;
iterator name list_for_each_entry_safe_from;
iterator name list_for_each_entry_safe_reverse;
iterator name hlist_for_each_entry;
iterator name hlist_for_each_entry_continue;
iterator name hlist_for_each_entry_from;
iterator name hlist_for_each_entry_safe;
statement S;
position p1,p2;
@@
(
list_for_each_entry@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_reverse@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_continue@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_continue_reverse@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_from@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_safe@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_safe_continue@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_safe_from@p1(c,...,member) { ... when != break;
when forall
when strict
}
|
list_for_each_entry_safe_reverse@p1(c,...,member) { ... when != break;
when forall
when strict
}
)
...
(
list_for_each_entry(c,...) S
|
list_for_each_entry_reverse(c,...) S
|
list_for_each_entry_continue(c,...) S
|
list_for_each_entry_continue_reverse(c,...) S
|
list_for_each_entry_from(c,...) S
|
list_for_each_entry_safe(c,...) S
|
list_for_each_entry_safe(x,c,...) S
|
list_for_each_entry_safe_continue(c,...) S
|
list_for_each_entry_safe_continue(x,c,...) S
|
list_for_each_entry_safe_from(c,...) S
|
list_for_each_entry_safe_from(x,c,...) S
|
list_for_each_entry_safe_reverse(c,...) S
|
list_for_each_entry_safe_reverse(x,c,...) S
|
hlist_for_each_entry(c,...) S
|
hlist_for_each_entry_continue(c,...) S
|
hlist_for_each_entry_from(c,...) S
|
hlist_for_each_entry_safe(c,...) S
|
list_remove_head(x,c,...)
|
sizeof(<+...c...+>)
|
&c->member
|
c = E
|
*c@p2
)
@script:python depends on org@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("invalid iterator index reference",p2)
cocci.print_secs("iterator",p1)
@script:python depends on report@
p1 << r.p1;
p2 << r.p2;
@@
msg = "ERROR: invalid reference to the index variable of the iterator on line %s" % (p1[0].line)
coccilib.report.print_report(p2[0], msg)
'7'>7
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ
affinity code, which we root caused to the qla2xxx driver assigning all its
MSI-X vectors to the pre and post vectors, and not having any left for the
actually spread IRQs.
Fix this issue by not asking for affinity assignment when there are no
vectors to assign left.
Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()")
Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com
Reported-by: Bart Van Assche <bart.vanassche@sandisk.com>
Tested-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>