https://github.com/torvalds/linux
Revision 2d860ad76f4ee4d2eba0fe3797c8d7cdce432cc0 authored by Linus Torvalds on 13 August 2009, 20:05:10 UTC, committed by Thomas Gleixner on 13 August 2009, 21:09:27 UTC
free_irq() can remove an irqaction while the corresponding interrupt is in progress, but free_irq() sets action->thread to NULL unconditionally, which might lead to a NULL pointer dereference in handle_IRQ_event() when the hard interrupt context tries to wake up the handler thread. Prevent this by moving the thread stop after synchronize_irq(). No need to set action->thread to NULL either as action is going to be freed anyway. This fixes a boot crash reported against preempt-rt which uses the mainline irq threads code to implement full irq threading. [ tglx: removed local irqthread variable ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Tip revision: 2d860ad76f4ee4d2eba0fe3797c8d7cdce432cc0 authored by Linus Torvalds on 13 August 2009, 20:05:10 UTC
genirq: prevent wakeup of freed irq thread
genirq: prevent wakeup of freed irq thread
Tip revision: 2d860ad
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .gitignore | -rw-r--r-- | 952 bytes |
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