107 lines
2.1 KiB
Plaintext
107 lines
2.1 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0-only
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/// Find functions that refer to GFP_KERNEL but are called with locks held.
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//# The proposed change of converting the GFP_KERNEL is not necessarily the
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//# correct one. It may be desired to unlock the lock, or to not call the
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//# function under the lock in the first place.
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///
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// Confidence: Moderate
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// Copyright: (C) 2012 Nicolas Palix.
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// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.
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// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.
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// URL: https://coccinelle.gitlabpages.inria.fr/website
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// Comments:
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// Options: --no-includes --include-headers
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virtual patch
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virtual context
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virtual org
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virtual report
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@gfp exists@
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identifier fn;
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position p;
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@@
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fn(...) {
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... when != read_unlock_irq(...)
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when != write_unlock_irq(...)
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when != read_unlock_irqrestore(...)
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when != write_unlock_irqrestore(...)
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when != spin_unlock(...)
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when != spin_unlock_irq(...)
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when != spin_unlock_irqrestore(...)
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when != local_irq_enable(...)
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when any
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GFP_KERNEL@p
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... when any
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}
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@locked exists@
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identifier gfp.fn;
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position p1,p2;
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@@
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(
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read_lock_irq@p1
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write_lock_irq@p1
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read_lock_irqsave@p1
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write_lock_irqsave@p1
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spin_lock@p1
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spin_trylock@p1
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spin_lock_irq@p1
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spin_lock_irqsave@p1
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local_irq_disable@p1
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)
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(...)
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... when != read_unlock_irq(...)
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when != write_unlock_irq(...)
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when != read_unlock_irqrestore(...)
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when != write_unlock_irqrestore(...)
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when != spin_unlock(...)
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when != spin_unlock_irq(...)
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when != spin_unlock_irqrestore(...)
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when != local_irq_enable(...)
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fn@p2(...)
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@depends on locked && patch@
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position gfp.p;
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@@
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- GFP_KERNEL@p
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+ GFP_ATOMIC
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@depends on locked && !patch@
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position gfp.p;
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@@
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* GFP_KERNEL@p
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@script:python depends on !patch && org@
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p << gfp.p;
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fn << gfp.fn;
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p1 << locked.p1;
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p2 << locked.p2;
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@@
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cocci.print_main("lock",p1)
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cocci.print_secs("call",p2)
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cocci.print_secs("GFP_KERNEL",p)
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@script:python depends on !patch && report@
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p << gfp.p;
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fn << gfp.fn;
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p1 << locked.p1;
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p2 << locked.p2;
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@@
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msg = "ERROR: function %s called on line %s inside lock on line %s but uses GFP_KERNEL" % (fn,p2[0].line,p1[0].line)
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coccilib.report.print_report(p[0], msg)
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