Online Linux Driver Verification Service (alpha)

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Verification Report

Driver: tests-model-32_1--test-doublelock.tar.bz2
Timestamp: 2012-07-25 19:52:57
Verification architecture: x86_64

You can see verification verdict for each rule and linux kernel. Verdict may be:

Safe - there is no mistakes for the given linux kernel and rule.
Unsafe - driver may contain an error. You can see the error trace by clicking on the "Unsafe" link for the corresponding linux kernel and rule.
Build failed - your driver is not compatible with the given linux kernel. In this case you may see the compile error trace by clicking on the "more details" link.
Unknown - tools can not determine whether your driver Safe or Unsafe.
Queued - the driver waits for the turn to verification.

93%

linux-3.0
Rule	Verdict
Mutex lock/unlock You should not acquire or release the same mutex twice in the same process. All locked mutexes should be unlocked at finalization. More information...	Unsafe
Module get/put Once you blocked a driver using `try_module_get()` you should unblock it by `module_put()`. More information...	Safe
Memory allocation inside spinlocks You should use `GFP_ATOMIC` flag when calling memory allocation functions when spinlock is held. More information...
Usb alloc/free urb More information...	Safe
Spinlocks lock/unlock It’s not allowed to acquire spin_lock twice. It’s not allowed to release not acquired spin_lock. At the end all spin_lock should be released. It’s not allowed to re-release a lock by spin_unlock/spin_unlock_irqrestore functions. More information...	Safe
linux-2.6.37
Rule	Verdict
Mutex lock/unlock You should not acquire or release the same mutex twice in the same process. All locked mutexes should be unlocked at finalization. More information...	Unsafe
Module get/put Once you blocked a driver using `try_module_get()` you should unblock it by `module_put()`. More information...	Safe
Memory allocation inside spinlocks You should use `GFP_ATOMIC` flag when calling memory allocation functions when spinlock is held. More information...	Safe
Usb alloc/free urb More information...	Safe
Spinlocks lock/unlock It’s not allowed to acquire spin_lock twice. It’s not allowed to release not acquired spin_lock. At the end all spin_lock should be released. It’s not allowed to re-release a lock by spin_unlock/spin_unlock_irqrestore functions. More information...	Safe
linux-2.6.32.12
Rule	Verdict
Mutex lock/unlock You should not acquire or release the same mutex twice in the same process. All locked mutexes should be unlocked at finalization. More information...	Unsafe
Module get/put Once you blocked a driver using `try_module_get()` you should unblock it by `module_put()`. More information...	Safe
Memory allocation inside spinlocks You should use `GFP_ATOMIC` flag when calling memory allocation functions when spinlock is held. More information...	Safe
Usb alloc/free urb More information...	Safe
Spinlocks lock/unlock It’s not allowed to acquire spin_lock twice. It’s not allowed to release not acquired spin_lock. At the end all spin_lock should be released. It’s not allowed to re-release a lock by spin_unlock/spin_unlock_irqrestore functions. More information...	Safe

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Online Linux Driver Verification Service (alpha)