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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | // SPDX-License-Identifier: GPL-2.0-only /// Find functions that refer to GFP_KERNEL but are called with locks held. //# The proposed change of converting the GFP_KERNEL is not necessarily the //# correct one. It may be desired to unlock the lock, or to not call the //# function under the lock in the first place. /// // Confidence: Moderate // Copyright: (C) 2012 Nicolas Palix. // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. // URL: http://coccinelle.lip6.fr/ // Comments: // Options: --no-includes --include-headers virtual patch virtual context virtual org virtual report @gfp exists@ identifier fn; position p; @@ fn(...) { ... when != read_unlock_irq(...) when != write_unlock_irq(...) when != read_unlock_irqrestore(...) when != write_unlock_irqrestore(...) when != spin_unlock(...) when != spin_unlock_irq(...) when != spin_unlock_irqrestore(...) when != local_irq_enable(...) when any GFP_KERNEL@p ... when any } @locked exists@ identifier gfp.fn; position p1,p2; @@ ( read_lock_irq@p1 | write_lock_irq@p1 | read_lock_irqsave@p1 | write_lock_irqsave@p1 | spin_lock@p1 | spin_trylock@p1 | spin_lock_irq@p1 | spin_lock_irqsave@p1 | local_irq_disable@p1 ) (...) ... when != read_unlock_irq(...) when != write_unlock_irq(...) when != read_unlock_irqrestore(...) when != write_unlock_irqrestore(...) when != spin_unlock(...) when != spin_unlock_irq(...) when != spin_unlock_irqrestore(...) when != local_irq_enable(...) fn@p2(...) @depends on locked && patch@ position gfp.p; @@ - GFP_KERNEL@p + GFP_ATOMIC @depends on locked && !patch@ position gfp.p; @@ * GFP_KERNEL@p @script:python depends on !patch && org@ p << gfp.p; fn << gfp.fn; p1 << locked.p1; p2 << locked.p2; @@ cocci.print_main("lock",p1) cocci.print_secs("call",p2) cocci.print_secs("GFP_KERNEL",p) @script:python depends on !patch && report@ p << gfp.p; fn << gfp.fn; p1 << locked.p1; p2 << locked.p2; @@ msg = "ERROR: function %s called on line %s inside lock on line %s but uses GFP_KERNEL" % (fn,p2[0].line,p1[0].line) coccilib.report.print_report(p[0], msg) |